package agent

import (
	"bytes"
	"context"
	"crypto/tls"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net"
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"strconv"
	"strings"
	"testing"
	"time"

	"github.com/google/tcpproxy"
	"github.com/hashicorp/consul/agent/cache"
	cachetype "github.com/hashicorp/consul/agent/cache-types"
	"github.com/hashicorp/consul/agent/checks"
	"github.com/hashicorp/consul/agent/config"
	"github.com/hashicorp/consul/agent/connect"
	"github.com/hashicorp/consul/agent/structs"
	"github.com/hashicorp/consul/api"
	"github.com/hashicorp/consul/ipaddr"
	"github.com/hashicorp/consul/sdk/freeport"
	"github.com/hashicorp/consul/sdk/testutil"
	"github.com/hashicorp/consul/sdk/testutil/retry"
	"github.com/hashicorp/consul/testrpc"
	"github.com/hashicorp/consul/types"
	"github.com/hashicorp/go-uuid"
	"github.com/hashicorp/serf/serf"
	"github.com/pascaldekloe/goe/verify"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func getService(a *TestAgent, id string) *structs.NodeService {
	return a.State.Service(structs.NewServiceID(id, nil))
}

func getCheck(a *TestAgent, id types.CheckID) *structs.HealthCheck {
	return a.State.Check(structs.NewCheckID(id, nil))
}

func requireServiceExists(t *testing.T, a *TestAgent, id string) *structs.NodeService {
	t.Helper()
	svc := getService(a, id)
	require.NotNil(t, svc, "missing service %q", id)
	return svc
}

func requireServiceMissing(t *testing.T, a *TestAgent, id string) {
	t.Helper()
	require.Nil(t, getService(a, id), "have service %q (expected missing)", id)
}

func requireCheckExists(t *testing.T, a *TestAgent, id types.CheckID) *structs.HealthCheck {
	t.Helper()
	chk := getCheck(a, id)
	require.NotNil(t, chk, "missing check %q", id)
	return chk
}

func requireCheckMissing(t *testing.T, a *TestAgent, id types.CheckID) {
	t.Helper()
	require.Nil(t, getCheck(a, id), "have check %q (expected missing)", id)
}

func requireCheckExistsMap(t *testing.T, m interface{}, id types.CheckID) {
	t.Helper()
	require.Contains(t, m, structs.NewCheckID(id, nil), "missing check %q", id)
}

func requireCheckMissingMap(t *testing.T, m interface{}, id types.CheckID) {
	t.Helper()
	require.NotContains(t, m, structs.NewCheckID(id, nil), "have check %q (expected missing)", id)
}

func externalIP() (string, error) {
	addrs, err := net.InterfaceAddrs()
	if err != nil {
		return "", fmt.Errorf("Unable to lookup network interfaces: %v", err)
	}
	for _, a := range addrs {
		if ipnet, ok := a.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
			if ipnet.IP.To4() != nil {
				return ipnet.IP.String(), nil
			}
		}
	}
	return "", fmt.Errorf("Unable to find a non-loopback interface")
}

func TestAgent_MultiStartStop(t *testing.T) {
	for i := 0; i < 10; i++ {
		t.Run("", func(t *testing.T) {
			t.Parallel()
			a := NewTestAgent(t, t.Name(), "")
			time.Sleep(250 * time.Millisecond)
			a.Shutdown()
		})
	}
}

func TestAgent_ConnectClusterIDConfig(t *testing.T) {
	tests := []struct {
		name          string
		hcl           string
		wantClusterID string
		wantErr       bool
	}{
		{
			name:          "default TestAgent has fixed cluster id",
			hcl:           "",
			wantClusterID: connect.TestClusterID,
		},
		{
			name:          "no cluster ID specified sets to test ID",
			hcl:           "connect { enabled = true }",
			wantClusterID: connect.TestClusterID,
		},
		{
			name: "non-UUID cluster_id is fatal",
			hcl: `connect {
	   enabled = true
	   ca_config {
	     cluster_id = "fake-id"
	   }
	 }`,
			wantClusterID: "",
			wantErr:       true,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			// This is a rare case where using a constructor for TestAgent
			// (NewTestAgent and the likes) won't work, since we expect an error
			// in one test case, and the constructors have built-in retry logic
			// that runs automatically upon error.
			a := &TestAgent{Name: tt.name, HCL: tt.hcl, LogOutput: testutil.TestWriter(t)}
			err := a.Start()
			if tt.wantErr {
				if err == nil {
					t.Fatal("expected error, got nil")
				}
				return // don't run the rest of the test
			}
			if !tt.wantErr && err != nil {
				t.Fatal(err)
			}
			defer a.Shutdown()

			cfg := a.consulConfig()
			assert.Equal(t, tt.wantClusterID, cfg.CAConfig.ClusterID)
		})
	}
}

func TestAgent_StartStop(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	if err := a.Leave(); err != nil {
		t.Fatalf("err: %v", err)
	}
	if err := a.Shutdown(); err != nil {
		t.Fatalf("err: %v", err)
	}

	select {
	case <-a.ShutdownCh():
	default:
		t.Fatalf("should be closed")
	}
}

func TestAgent_RPCPing(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	var out struct{}
	if err := a.RPC("Status.Ping", struct{}{}, &out); err != nil {
		t.Fatalf("err: %v", err)
	}
}

func TestAgent_TokenStore(t *testing.T) {
	t.Parallel()

	a := NewTestAgent(t, t.Name(), `
		acl_token = "user"
		acl_agent_token = "agent"
		acl_agent_master_token = "master"`,
	)
	defer a.Shutdown()

	if got, want := a.tokens.UserToken(), "user"; got != want {
		t.Fatalf("got %q want %q", got, want)
	}
	if got, want := a.tokens.AgentToken(), "agent"; got != want {
		t.Fatalf("got %q want %q", got, want)
	}
	if got, want := a.tokens.IsAgentMasterToken("master"), true; got != want {
		t.Fatalf("got %v want %v", got, want)
	}
}

func TestAgent_ReconnectConfigSettings(t *testing.T) {
	t.Parallel()
	func() {
		a := NewTestAgent(t, t.Name(), "")
		defer a.Shutdown()

		lan := a.consulConfig().SerfLANConfig.ReconnectTimeout
		if lan != 3*24*time.Hour {
			t.Fatalf("bad: %s", lan.String())
		}

		wan := a.consulConfig().SerfWANConfig.ReconnectTimeout
		if wan != 3*24*time.Hour {
			t.Fatalf("bad: %s", wan.String())
		}
	}()

	func() {
		a := NewTestAgent(t, t.Name(), `
			reconnect_timeout = "24h"
			reconnect_timeout_wan = "36h"
		`)
		defer a.Shutdown()

		lan := a.consulConfig().SerfLANConfig.ReconnectTimeout
		if lan != 24*time.Hour {
			t.Fatalf("bad: %s", lan.String())
		}

		wan := a.consulConfig().SerfWANConfig.ReconnectTimeout
		if wan != 36*time.Hour {
			t.Fatalf("bad: %s", wan.String())
		}
	}()
}

func TestAgent_ReconnectConfigWanDisabled(t *testing.T) {
	t.Parallel()

	a := NewTestAgent(t, t.Name(), `
		ports { serf_wan = -1 }
		reconnect_timeout_wan = "36h"
	`)
	defer a.Shutdown()

	// This is also testing that we dont panic like before #4515
	require.Nil(t, a.consulConfig().SerfWANConfig)
}

func TestAgent_setupNodeID(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), `
		node_id = ""
	`)
	defer a.Shutdown()

	cfg := a.config

	// The auto-assigned ID should be valid.
	id := a.consulConfig().NodeID
	if _, err := uuid.ParseUUID(string(id)); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Running again should get the same ID (persisted in the file).
	cfg.NodeID = ""
	if err := a.setupNodeID(cfg); err != nil {
		t.Fatalf("err: %v", err)
	}
	if newID := a.consulConfig().NodeID; id != newID {
		t.Fatalf("bad: %q vs %q", id, newID)
	}

	// Set an invalid ID via.Config.
	cfg.NodeID = types.NodeID("nope")
	err := a.setupNodeID(cfg)
	if err == nil || !strings.Contains(err.Error(), "uuid string is wrong length") {
		t.Fatalf("err: %v", err)
	}

	// Set a valid ID via.Config.
	newID, err := uuid.GenerateUUID()
	if err != nil {
		t.Fatalf("err: %v", err)
	}
	cfg.NodeID = types.NodeID(strings.ToUpper(newID))
	if err := a.setupNodeID(cfg); err != nil {
		t.Fatalf("err: %v", err)
	}
	if id := a.consulConfig().NodeID; string(id) != newID {
		t.Fatalf("bad: %q vs. %q", id, newID)
	}

	// Set an invalid ID via the file.
	fileID := filepath.Join(cfg.DataDir, "node-id")
	if err := ioutil.WriteFile(fileID, []byte("adf4238a!882b!9ddc!4a9d!5b6758e4159e"), 0600); err != nil {
		t.Fatalf("err: %v", err)
	}
	cfg.NodeID = ""
	err = a.setupNodeID(cfg)
	if err == nil || !strings.Contains(err.Error(), "uuid is improperly formatted") {
		t.Fatalf("err: %v", err)
	}

	// Set a valid ID via the file.
	if err := ioutil.WriteFile(fileID, []byte("ADF4238a-882b-9ddc-4a9d-5b6758e4159e"), 0600); err != nil {
		t.Fatalf("err: %v", err)
	}
	cfg.NodeID = ""
	if err := a.setupNodeID(cfg); err != nil {
		t.Fatalf("err: %v", err)
	}
	if id := a.consulConfig().NodeID; string(id) != "adf4238a-882b-9ddc-4a9d-5b6758e4159e" {
		t.Fatalf("bad: %q vs. %q", id, newID)
	}
}

func TestAgent_makeNodeID(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), `
		node_id = ""
	`)
	defer a.Shutdown()

	// We should get a valid host-based ID initially.
	id, err := a.makeNodeID()
	if err != nil {
		t.Fatalf("err: %v", err)
	}
	if _, err := uuid.ParseUUID(string(id)); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Calling again should yield a random ID by default.
	another, err := a.makeNodeID()
	if err != nil {
		t.Fatalf("err: %v", err)
	}
	if id == another {
		t.Fatalf("bad: %s vs %s", id, another)
	}

	// Turn on host-based IDs and try again. We should get the same ID
	// each time (and a different one from the random one above).
	a.Config.DisableHostNodeID = false
	id, err = a.makeNodeID()
	if err != nil {
		t.Fatalf("err: %v", err)
	}
	if id == another {
		t.Fatalf("bad: %s vs %s", id, another)
	}

	// Calling again should yield the host-based ID.
	another, err = a.makeNodeID()
	if err != nil {
		t.Fatalf("err: %v", err)
	}
	if id != another {
		t.Fatalf("bad: %s vs %s", id, another)
	}
}

func TestAgent_AddService(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_AddService(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_AddService(t, "enable_central_service_config = true")
	})
}

func testAgent_AddService(t *testing.T, extraHCL string) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), `
		node_name = "node1"
	`+extraHCL)
	defer a.Shutdown()

	tests := []struct {
		desc       string
		srv        *structs.NodeService
		wantSrv    func(ns *structs.NodeService)
		chkTypes   []*structs.CheckType
		healthChks map[string]*structs.HealthCheck
	}{
		{
			"one check",
			&structs.NodeService{
				ID:             "svcid1",
				Service:        "svcname1",
				Tags:           []string{"tag1"},
				Weights:        nil, // nil weights...
				Port:           8100,
				EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
			},
			// ... should be populated to avoid "IsSame" returning true during AE.
			func(ns *structs.NodeService) {
				ns.Weights = &structs.Weights{
					Passing: 1,
					Warning: 1,
				}
			},
			[]*structs.CheckType{
				&structs.CheckType{
					CheckID: "check1",
					Name:    "name1",
					TTL:     time.Minute,
					Notes:   "note1",
				},
			},
			map[string]*structs.HealthCheck{
				"check1": &structs.HealthCheck{
					Node:           "node1",
					CheckID:        "check1",
					Name:           "name1",
					Status:         "critical",
					Notes:          "note1",
					ServiceID:      "svcid1",
					ServiceName:    "svcname1",
					ServiceTags:    []string{"tag1"},
					Type:           "ttl",
					EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
				},
			},
		},
		{
			"multiple checks",
			&structs.NodeService{
				ID:      "svcid2",
				Service: "svcname2",
				Weights: &structs.Weights{
					Passing: 2,
					Warning: 1,
				},
				Tags:           []string{"tag2"},
				Port:           8200,
				EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
			},
			nil, // No change expected
			[]*structs.CheckType{
				&structs.CheckType{
					CheckID: "check1",
					Name:    "name1",
					TTL:     time.Minute,
					Notes:   "note1",
				},
				&structs.CheckType{
					CheckID: "check-noname",
					TTL:     time.Minute,
				},
				&structs.CheckType{
					Name: "check-noid",
					TTL:  time.Minute,
				},
				&structs.CheckType{
					TTL: time.Minute,
				},
			},
			map[string]*structs.HealthCheck{
				"check1": &structs.HealthCheck{
					Node:           "node1",
					CheckID:        "check1",
					Name:           "name1",
					Status:         "critical",
					Notes:          "note1",
					ServiceID:      "svcid2",
					ServiceName:    "svcname2",
					ServiceTags:    []string{"tag2"},
					Type:           "ttl",
					EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
				},
				"check-noname": &structs.HealthCheck{
					Node:           "node1",
					CheckID:        "check-noname",
					Name:           "Service 'svcname2' check",
					Status:         "critical",
					ServiceID:      "svcid2",
					ServiceName:    "svcname2",
					ServiceTags:    []string{"tag2"},
					Type:           "ttl",
					EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
				},
				"service:svcid2:3": &structs.HealthCheck{
					Node:           "node1",
					CheckID:        "service:svcid2:3",
					Name:           "check-noid",
					Status:         "critical",
					ServiceID:      "svcid2",
					ServiceName:    "svcname2",
					ServiceTags:    []string{"tag2"},
					Type:           "ttl",
					EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
				},
				"service:svcid2:4": &structs.HealthCheck{
					Node:           "node1",
					CheckID:        "service:svcid2:4",
					Name:           "Service 'svcname2' check",
					Status:         "critical",
					ServiceID:      "svcid2",
					ServiceName:    "svcname2",
					ServiceTags:    []string{"tag2"},
					Type:           "ttl",
					EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
				},
			},
		},
	}

	for _, tt := range tests {
		t.Run(tt.desc, func(t *testing.T) {
			// check the service registration
			t.Run(tt.srv.ID, func(t *testing.T) {
				err := a.AddService(tt.srv, tt.chkTypes, false, "", ConfigSourceLocal)
				if err != nil {
					t.Fatalf("err: %v", err)
				}

				got := getService(a, tt.srv.ID)
				// Make a copy since the tt.srv points to the one in memory in the local
				// state still so changing it is a tautology!
				want := *tt.srv
				if tt.wantSrv != nil {
					tt.wantSrv(&want)
				}
				require.Equal(t, &want, got)
				require.True(t, got.IsSame(&want))
			})

			// check the health checks
			for k, v := range tt.healthChks {
				t.Run(k, func(t *testing.T) {
					got := getCheck(a, types.CheckID(k))
					require.Equal(t, v, got)
				})
			}

			// check the ttl checks
			for k := range tt.healthChks {
				t.Run(k+" ttl", func(t *testing.T) {
					chk := a.checkTTLs[structs.NewCheckID(types.CheckID(k), nil)]
					if chk == nil {
						t.Fatal("got nil want TTL check")
					}
					if got, want := string(chk.CheckID.ID), k; got != want {
						t.Fatalf("got CheckID %v want %v", got, want)
					}
					if got, want := chk.TTL, time.Minute; got != want {
						t.Fatalf("got TTL %v want %v", got, want)
					}
				})
			}
		})
	}
}

func TestAgent_AddServices_AliasUpdateCheckNotReverted(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_AddServices_AliasUpdateCheckNotReverted(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_AddServices_AliasUpdateCheckNotReverted(t, "enable_central_service_config = true")
	})
}

func testAgent_AddServices_AliasUpdateCheckNotReverted(t *testing.T, extraHCL string) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), `
		node_name = "node1"
	`+extraHCL)
	defer a.Shutdown()

	// It's tricky to get an UpdateCheck call to be timed properly so it lands
	// right in the middle of an addServiceInternal call so we cheat a bit and
	// rely upon alias checks to do that work for us.  We add enough services
	// that probabilistically one of them is going to end up properly in the
	// critical section.
	//
	// The first number I picked here (10) surprisingly failed every time prior
	// to PR #6144 solving the underlying problem.
	const numServices = 10

	services := make([]*structs.ServiceDefinition, numServices)
	checkIDs := make([]types.CheckID, numServices)
	for i := 0; i < numServices; i++ {
		name := fmt.Sprintf("web-%d", i)

		services[i] = &structs.ServiceDefinition{
			ID:   name,
			Name: name,
			Port: 8080 + i,
			Checks: []*structs.CheckType{
				&structs.CheckType{
					Name:         "alias-for-fake-service",
					AliasService: "fake",
				},
			},
		}

		checkIDs[i] = types.CheckID("service:" + name)
	}

	// Add all of the services quickly as you might do from config file snippets.
	for _, service := range services {
		ns := service.NodeService()

		chkTypes, err := service.CheckTypes()
		require.NoError(t, err)

		require.NoError(t, a.AddService(ns, chkTypes, false, service.Token, ConfigSourceLocal))
	}

	retry.Run(t, func(r *retry.R) {
		gotChecks := a.State.Checks(nil)
		for id, check := range gotChecks {
			require.Equal(r, "passing", check.Status, "check %q is wrong", id)
			require.Equal(r, "No checks found.", check.Output, "check %q is wrong", id)
		}
	})
}

func TestAgent_AddServiceNoExec(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_AddServiceNoExec(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_AddServiceNoExec(t, "enable_central_service_config = true")
	})
}

func testAgent_AddServiceNoExec(t *testing.T, extraHCL string) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), `
		node_name = "node1"
	`+extraHCL)
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	srv := &structs.NodeService{
		ID:      "svcid1",
		Service: "svcname1",
		Tags:    []string{"tag1"},
		Port:    8100,
	}
	chk := &structs.CheckType{
		ScriptArgs: []string{"exit", "0"},
		Interval:   15 * time.Second,
	}

	err := a.AddService(srv, []*structs.CheckType{chk}, false, "", ConfigSourceLocal)
	if err == nil || !strings.Contains(err.Error(), "Scripts are disabled on this agent") {
		t.Fatalf("err: %v", err)
	}

	err = a.AddService(srv, []*structs.CheckType{chk}, false, "", ConfigSourceRemote)
	if err == nil || !strings.Contains(err.Error(), "Scripts are disabled on this agent") {
		t.Fatalf("err: %v", err)
	}
}

func TestAgent_AddServiceNoRemoteExec(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_AddServiceNoRemoteExec(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_AddServiceNoRemoteExec(t, "enable_central_service_config = true")
	})
}

func testAgent_AddServiceNoRemoteExec(t *testing.T, extraHCL string) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), `
		node_name = "node1"
		enable_local_script_checks = true
	`+extraHCL)
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	srv := &structs.NodeService{
		ID:      "svcid1",
		Service: "svcname1",
		Tags:    []string{"tag1"},
		Port:    8100,
	}
	chk := &structs.CheckType{
		ScriptArgs: []string{"exit", "0"},
		Interval:   15 * time.Second,
	}

	err := a.AddService(srv, []*structs.CheckType{chk}, false, "", ConfigSourceRemote)
	if err == nil || !strings.Contains(err.Error(), "Scripts are disabled on this agent") {
		t.Fatalf("err: %v", err)
	}
}

func TestAddServiceIPv4TaggedDefault(t *testing.T) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	srv := &structs.NodeService{
		Service: "my_service",
		ID:      "my_service_id",
		Port:    8100,
		Address: "10.0.1.2",
	}

	err := a.AddService(srv, []*structs.CheckType{}, false, "", ConfigSourceRemote)
	require.Nil(t, err)

	ns := a.State.Service(structs.NewServiceID("my_service_id", nil))
	require.NotNil(t, ns)

	svcAddr := structs.ServiceAddress{Address: srv.Address, Port: srv.Port}
	require.Equal(t, svcAddr, ns.TaggedAddresses[structs.TaggedAddressLANIPv4])
	require.Equal(t, svcAddr, ns.TaggedAddresses[structs.TaggedAddressWANIPv4])
	_, ok := ns.TaggedAddresses[structs.TaggedAddressLANIPv6]
	require.False(t, ok)
	_, ok = ns.TaggedAddresses[structs.TaggedAddressWANIPv6]
	require.False(t, ok)
}

func TestAddServiceIPv6TaggedDefault(t *testing.T) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	srv := &structs.NodeService{
		Service: "my_service",
		ID:      "my_service_id",
		Port:    8100,
		Address: "::5",
	}

	err := a.AddService(srv, []*structs.CheckType{}, false, "", ConfigSourceRemote)
	require.Nil(t, err)

	ns := a.State.Service(structs.NewServiceID("my_service_id", nil))
	require.NotNil(t, ns)

	svcAddr := structs.ServiceAddress{Address: srv.Address, Port: srv.Port}
	require.Equal(t, svcAddr, ns.TaggedAddresses[structs.TaggedAddressLANIPv6])
	require.Equal(t, svcAddr, ns.TaggedAddresses[structs.TaggedAddressWANIPv6])
	_, ok := ns.TaggedAddresses[structs.TaggedAddressLANIPv4]
	require.False(t, ok)
	_, ok = ns.TaggedAddresses[structs.TaggedAddressWANIPv4]
	require.False(t, ok)
}

func TestAddServiceIPv4TaggedSet(t *testing.T) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	srv := &structs.NodeService{
		Service: "my_service",
		ID:      "my_service_id",
		Port:    8100,
		Address: "10.0.1.2",
		TaggedAddresses: map[string]structs.ServiceAddress{
			structs.TaggedAddressWANIPv4: {
				Address: "10.100.200.5",
				Port:    8100,
			},
		},
	}

	err := a.AddService(srv, []*structs.CheckType{}, false, "", ConfigSourceRemote)
	require.Nil(t, err)

	ns := a.State.Service(structs.NewServiceID("my_service_id", nil))
	require.NotNil(t, ns)

	svcAddr := structs.ServiceAddress{Address: srv.Address, Port: srv.Port}
	require.Equal(t, svcAddr, ns.TaggedAddresses[structs.TaggedAddressLANIPv4])
	require.Equal(t, structs.ServiceAddress{Address: "10.100.200.5", Port: 8100}, ns.TaggedAddresses[structs.TaggedAddressWANIPv4])
	_, ok := ns.TaggedAddresses[structs.TaggedAddressLANIPv6]
	require.False(t, ok)
	_, ok = ns.TaggedAddresses[structs.TaggedAddressWANIPv6]
	require.False(t, ok)
}

func TestAddServiceIPv6TaggedSet(t *testing.T) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	srv := &structs.NodeService{
		Service: "my_service",
		ID:      "my_service_id",
		Port:    8100,
		Address: "::5",
		TaggedAddresses: map[string]structs.ServiceAddress{
			structs.TaggedAddressWANIPv6: {
				Address: "::6",
				Port:    8100,
			},
		},
	}

	err := a.AddService(srv, []*structs.CheckType{}, false, "", ConfigSourceRemote)
	require.Nil(t, err)

	ns := a.State.Service(structs.NewServiceID("my_service_id", nil))
	require.NotNil(t, ns)

	svcAddr := structs.ServiceAddress{Address: srv.Address, Port: srv.Port}
	require.Equal(t, svcAddr, ns.TaggedAddresses[structs.TaggedAddressLANIPv6])
	require.Equal(t, structs.ServiceAddress{Address: "::6", Port: 8100}, ns.TaggedAddresses[structs.TaggedAddressWANIPv6])
	_, ok := ns.TaggedAddresses[structs.TaggedAddressLANIPv4]
	require.False(t, ok)
	_, ok = ns.TaggedAddresses[structs.TaggedAddressWANIPv4]
	require.False(t, ok)
}

func TestAgent_RemoveService(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_RemoveService(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_RemoveService(t, "enable_central_service_config = true")
	})
}

func testAgent_RemoveService(t *testing.T, extraHCL string) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), extraHCL)
	defer a.Shutdown()

	// Remove a service that doesn't exist
	if err := a.RemoveService(structs.NewServiceID("redis", nil)); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Remove without an ID
	if err := a.RemoveService(structs.NewServiceID("", nil)); err == nil {
		t.Fatalf("should have errored")
	}

	// Removing a service with a single check works
	{
		srv := &structs.NodeService{
			ID:      "memcache",
			Service: "memcache",
			Port:    8000,
		}
		chkTypes := []*structs.CheckType{&structs.CheckType{TTL: time.Minute}}

		if err := a.AddService(srv, chkTypes, false, "", ConfigSourceLocal); err != nil {
			t.Fatalf("err: %v", err)
		}

		// Add a check after the fact with a specific check ID
		check := &structs.CheckDefinition{
			ID:        "check2",
			Name:      "check2",
			ServiceID: "memcache",
			TTL:       time.Minute,
		}
		hc := check.HealthCheck("node1")
		if err := a.AddCheck(hc, check.CheckType(), false, "", ConfigSourceLocal); err != nil {
			t.Fatalf("err: %s", err)
		}

		if err := a.RemoveService(structs.NewServiceID("memcache", nil)); err != nil {
			t.Fatalf("err: %s", err)
		}
		require.Nil(t, a.State.Check(structs.NewCheckID("service:memcache", nil)), "have memcache check")
		require.Nil(t, a.State.Check(structs.NewCheckID("check2", nil)), "have check2 check")
	}

	// Removing a service with multiple checks works
	{
		// add a service to remove
		srv := &structs.NodeService{
			ID:      "redis",
			Service: "redis",
			Port:    8000,
		}
		chkTypes := []*structs.CheckType{
			&structs.CheckType{TTL: time.Minute},
			&structs.CheckType{TTL: 30 * time.Second},
		}
		if err := a.AddService(srv, chkTypes, false, "", ConfigSourceLocal); err != nil {
			t.Fatalf("err: %v", err)
		}

		// add another service that wont be affected
		srv = &structs.NodeService{
			ID:      "mysql",
			Service: "mysql",
			Port:    3306,
		}
		chkTypes = []*structs.CheckType{
			&structs.CheckType{TTL: time.Minute},
			&structs.CheckType{TTL: 30 * time.Second},
		}
		if err := a.AddService(srv, chkTypes, false, "", ConfigSourceLocal); err != nil {
			t.Fatalf("err: %v", err)
		}

		// Remove the service
		if err := a.RemoveService(structs.NewServiceID("redis", nil)); err != nil {
			t.Fatalf("err: %v", err)
		}

		// Ensure we have a state mapping
		requireServiceMissing(t, a, "redis")

		// Ensure checks were removed
		requireCheckMissing(t, a, "service:redis:1")
		requireCheckMissing(t, a, "service:redis:2")
		requireCheckMissingMap(t, a.checkTTLs, "service:redis:1")
		requireCheckMissingMap(t, a.checkTTLs, "service:redis:2")

		// check the mysql service is unnafected
		requireCheckExistsMap(t, a.checkTTLs, "service:mysql:1")
		requireCheckExists(t, a, "service:mysql:1")
		requireCheckExistsMap(t, a.checkTTLs, "service:mysql:2")
		requireCheckExists(t, a, "service:mysql:2")
	}
}

func TestAgent_RemoveServiceRemovesAllChecks(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_RemoveServiceRemovesAllChecks(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_RemoveServiceRemovesAllChecks(t, "enable_central_service_config = true")
	})
}

func testAgent_RemoveServiceRemovesAllChecks(t *testing.T, extraHCL string) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), `
		node_name = "node1"
	`+extraHCL)
	defer a.Shutdown()
	svc := &structs.NodeService{ID: "redis", Service: "redis", Port: 8000, EnterpriseMeta: *structs.DefaultEnterpriseMeta()}
	chk1 := &structs.CheckType{CheckID: "chk1", Name: "chk1", TTL: time.Minute}
	chk2 := &structs.CheckType{CheckID: "chk2", Name: "chk2", TTL: 2 * time.Minute}
	hchk1 := &structs.HealthCheck{
		Node:           "node1",
		CheckID:        "chk1",
		Name:           "chk1",
		Status:         "critical",
		ServiceID:      "redis",
		ServiceName:    "redis",
		Type:           "ttl",
		EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
	}
	hchk2 := &structs.HealthCheck{Node: "node1",
		CheckID:        "chk2",
		Name:           "chk2",
		Status:         "critical",
		ServiceID:      "redis",
		ServiceName:    "redis",
		Type:           "ttl",
		EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
	}

	// register service with chk1
	if err := a.AddService(svc, []*structs.CheckType{chk1}, false, "", ConfigSourceLocal); err != nil {
		t.Fatal("Failed to register service", err)
	}

	// verify chk1 exists
	requireCheckExists(t, a, "chk1")

	// update the service with chk2
	if err := a.AddService(svc, []*structs.CheckType{chk2}, false, "", ConfigSourceLocal); err != nil {
		t.Fatal("Failed to update service", err)
	}

	// check that both checks are there
	require.Equal(t, hchk1, getCheck(a, "chk1"))
	require.Equal(t, hchk2, getCheck(a, "chk2"))

	// Remove service
	if err := a.RemoveService(structs.NewServiceID("redis", nil)); err != nil {
		t.Fatal("Failed to remove service", err)
	}

	// Check that both checks are gone
	requireCheckMissing(t, a, "chk1")
	requireCheckMissing(t, a, "chk2")
}

// TestAgent_IndexChurn is designed to detect a class of issues where
// we would have unnecessary catalog churn from anti-entropy. See issues
// #3259, #3642, #3845, and #3866.
func TestAgent_IndexChurn(t *testing.T) {
	t.Parallel()

	t.Run("no tags", func(t *testing.T) {
		verifyIndexChurn(t, nil)
	})

	t.Run("with tags", func(t *testing.T) {
		verifyIndexChurn(t, []string{"foo", "bar"})
	})
}

// verifyIndexChurn registers some things and runs anti-entropy a bunch of times
// in a row to make sure there are no index bumps.
func verifyIndexChurn(t *testing.T, tags []string) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	weights := &structs.Weights{
		Passing: 1,
		Warning: 1,
	}
	// Ensure we have a leader before we start adding the services
	testrpc.WaitForLeader(t, a.RPC, "dc1")

	svc := &structs.NodeService{
		ID:      "redis",
		Service: "redis",
		Port:    8000,
		Tags:    tags,
		Weights: weights,
	}
	if err := a.AddService(svc, nil, true, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}

	chk := &structs.HealthCheck{
		CheckID:   "redis-check",
		Name:      "Service-level check",
		ServiceID: "redis",
		Status:    api.HealthCritical,
	}
	chkt := &structs.CheckType{
		TTL: time.Hour,
	}
	if err := a.AddCheck(chk, chkt, true, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}

	chk = &structs.HealthCheck{
		CheckID: "node-check",
		Name:    "Node-level check",
		Status:  api.HealthCritical,
	}
	chkt = &structs.CheckType{
		TTL: time.Hour,
	}
	if err := a.AddCheck(chk, chkt, true, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}

	if err := a.sync.State.SyncFull(); err != nil {
		t.Fatalf("err: %v", err)
	}

	args := &structs.ServiceSpecificRequest{
		Datacenter:  "dc1",
		ServiceName: "redis",
	}
	var before structs.IndexedCheckServiceNodes

	// This sleep is so that the serfHealth check is added to the agent
	// A value of 375ms is sufficient enough time to ensure the serfHealth
	// check is added to an agent. 500ms so that we don't see flakiness ever.
	time.Sleep(500 * time.Millisecond)

	if err := a.RPC("Health.ServiceNodes", args, &before); err != nil {
		t.Fatalf("err: %v", err)
	}
	for _, name := range before.Nodes[0].Checks {
		a.logger.Debug("Registered node", "node", name.Name)
	}
	if got, want := len(before.Nodes), 1; got != want {
		t.Fatalf("got %d want %d", got, want)
	}
	if got, want := len(before.Nodes[0].Checks), 3; /* incl. serfHealth */ got != want {
		t.Fatalf("got %d want %d", got, want)
	}

	for i := 0; i < 10; i++ {
		a.logger.Info("Sync in progress", "iteration", i+1)
		if err := a.sync.State.SyncFull(); err != nil {
			t.Fatalf("err: %v", err)
		}
	}
	// If this test fails here this means that the Consul-X-Index
	// has changed for the RPC, which means that idempotent ops
	// are not working as intended.
	var after structs.IndexedCheckServiceNodes
	if err := a.RPC("Health.ServiceNodes", args, &after); err != nil {
		t.Fatalf("err: %v", err)
	}
	verify.Values(t, "", after, before)
}

func TestAgent_AddCheck(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), `
		enable_script_checks = true
	`)
	defer a.Shutdown()

	health := &structs.HealthCheck{
		Node:    "foo",
		CheckID: "mem",
		Name:    "memory util",
		Status:  api.HealthCritical,
	}
	chk := &structs.CheckType{
		ScriptArgs: []string{"exit", "0"},
		Interval:   15 * time.Second,
	}
	err := a.AddCheck(health, chk, false, "", ConfigSourceLocal)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	// Ensure we have a check mapping
	sChk := requireCheckExists(t, a, "mem")

	// Ensure our check is in the right state
	if sChk.Status != api.HealthCritical {
		t.Fatalf("check not critical")
	}

	// Ensure a TTL is setup
	requireCheckExistsMap(t, a.checkMonitors, "mem")
}

func TestAgent_AddCheck_StartPassing(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), `
		enable_script_checks = true
	`)
	defer a.Shutdown()

	health := &structs.HealthCheck{
		Node:    "foo",
		CheckID: "mem",
		Name:    "memory util",
		Status:  api.HealthPassing,
	}
	chk := &structs.CheckType{
		ScriptArgs: []string{"exit", "0"},
		Interval:   15 * time.Second,
	}
	err := a.AddCheck(health, chk, false, "", ConfigSourceLocal)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	// Ensure we have a check mapping
	sChk := requireCheckExists(t, a, "mem")

	// Ensure our check is in the right state
	if sChk.Status != api.HealthPassing {
		t.Fatalf("check not passing")
	}

	// Ensure a TTL is setup
	requireCheckExistsMap(t, a.checkMonitors, "mem")
}

func TestAgent_AddCheck_MinInterval(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), `
		enable_script_checks = true
	`)
	defer a.Shutdown()

	health := &structs.HealthCheck{
		Node:    "foo",
		CheckID: "mem",
		Name:    "memory util",
		Status:  api.HealthCritical,
	}
	chk := &structs.CheckType{
		ScriptArgs: []string{"exit", "0"},
		Interval:   time.Microsecond,
	}
	err := a.AddCheck(health, chk, false, "", ConfigSourceLocal)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	// Ensure we have a check mapping
	requireCheckExists(t, a, "mem")

	// Ensure a TTL is setup
	if mon, ok := a.checkMonitors[structs.NewCheckID("mem", nil)]; !ok {
		t.Fatalf("missing mem monitor")
	} else if mon.Interval != checks.MinInterval {
		t.Fatalf("bad mem monitor interval")
	}
}

func TestAgent_AddCheck_MissingService(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), `
		enable_script_checks = true
	`)
	defer a.Shutdown()

	health := &structs.HealthCheck{
		Node:      "foo",
		CheckID:   "baz",
		Name:      "baz check 1",
		ServiceID: "baz",
	}
	chk := &structs.CheckType{
		ScriptArgs: []string{"exit", "0"},
		Interval:   time.Microsecond,
	}
	err := a.AddCheck(health, chk, false, "", ConfigSourceLocal)
	if err == nil || err.Error() != fmt.Sprintf("ServiceID %q does not exist", structs.ServiceIDString("baz", nil)) {
		t.Fatalf("expected service id error, got: %v", err)
	}
}

func TestAgent_AddCheck_RestoreState(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	// Create some state and persist it
	ttl := &checks.CheckTTL{
		CheckID: structs.NewCheckID("baz", nil),
		TTL:     time.Minute,
	}
	err := a.persistCheckState(ttl, api.HealthPassing, "yup")
	if err != nil {
		t.Fatalf("err: %s", err)
	}

	// Build and register the check definition and initial state
	health := &structs.HealthCheck{
		Node:    "foo",
		CheckID: "baz",
		Name:    "baz check 1",
	}
	chk := &structs.CheckType{
		TTL: time.Minute,
	}
	err = a.AddCheck(health, chk, false, "", ConfigSourceLocal)
	if err != nil {
		t.Fatalf("err: %s", err)
	}

	// Ensure the check status was restored during registration
	check := requireCheckExists(t, a, "baz")
	if check.Status != api.HealthPassing {
		t.Fatalf("bad: %#v", check)
	}
	if check.Output != "yup" {
		t.Fatalf("bad: %#v", check)
	}
}

func TestAgent_AddCheck_ExecDisable(t *testing.T) {
	t.Parallel()

	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	health := &structs.HealthCheck{
		Node:    "foo",
		CheckID: "mem",
		Name:    "memory util",
		Status:  api.HealthCritical,
	}
	chk := &structs.CheckType{
		ScriptArgs: []string{"exit", "0"},
		Interval:   15 * time.Second,
	}
	err := a.AddCheck(health, chk, false, "", ConfigSourceLocal)
	if err == nil || !strings.Contains(err.Error(), "Scripts are disabled on this agent") {
		t.Fatalf("err: %v", err)
	}

	// Ensure we don't have a check mapping
	requireCheckMissing(t, a, "mem")

	err = a.AddCheck(health, chk, false, "", ConfigSourceRemote)
	if err == nil || !strings.Contains(err.Error(), "Scripts are disabled on this agent") {
		t.Fatalf("err: %v", err)
	}

	// Ensure we don't have a check mapping
	requireCheckMissing(t, a, "mem")
}

func TestAgent_AddCheck_ExecRemoteDisable(t *testing.T) {
	t.Parallel()

	a := NewTestAgent(t, t.Name(), `
		enable_local_script_checks = true
	`)
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	health := &structs.HealthCheck{
		Node:    "foo",
		CheckID: "mem",
		Name:    "memory util",
		Status:  api.HealthCritical,
	}
	chk := &structs.CheckType{
		ScriptArgs: []string{"exit", "0"},
		Interval:   15 * time.Second,
	}
	err := a.AddCheck(health, chk, false, "", ConfigSourceRemote)
	if err == nil || !strings.Contains(err.Error(), "Scripts are disabled on this agent from remote calls") {
		t.Fatalf("err: %v", err)
	}

	// Ensure we don't have a check mapping
	requireCheckMissing(t, a, "mem")
}

func TestAgent_AddCheck_GRPC(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	health := &structs.HealthCheck{
		Node:    "foo",
		CheckID: "grpchealth",
		Name:    "grpc health checking protocol",
		Status:  api.HealthCritical,
	}
	chk := &structs.CheckType{
		GRPC:     "localhost:12345/package.Service",
		Interval: 15 * time.Second,
	}
	err := a.AddCheck(health, chk, false, "", ConfigSourceLocal)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	// Ensure we have a check mapping
	sChk := requireCheckExists(t, a, "grpchealth")

	// Ensure our check is in the right state
	if sChk.Status != api.HealthCritical {
		t.Fatalf("check not critical")
	}

	// Ensure a check is setup
	requireCheckExistsMap(t, a.checkGRPCs, "grpchealth")
}

func TestAgent_RestoreServiceWithAliasCheck(t *testing.T) {
	// t.Parallel() don't even think about making this parallel

	// This test is very contrived and tests for the absence of race conditions
	// related to the implementation of alias checks. As such it is slow,
	// serial, full of sleeps and retries, and not generally a great test to
	// run all of the time.
	//
	// That said it made it incredibly easy to root out various race conditions
	// quite successfully.
	//
	// The original set of races was between:
	//
	//   - agent startup reloading Services and Checks from disk
	//   - API requests to also re-register those same Services and Checks
	//   - the goroutines for the as-yet-to-be-stopped CheckAlias goroutines

	if os.Getenv("SLOWTEST") != "1" {
		t.Skip("skipping slow test; set SLOWTEST=1 to run")
		return
	}

	// We do this so that the agent logs and the informational messages from
	// the test itself are interwoven properly.
	logf := func(t *testing.T, a *TestAgent, format string, args ...interface{}) {
		a.logger.Info("testharness: " + fmt.Sprintf(format, args...))
	}

	dataDir := testutil.TempDir(t, "agent") // we manage the data dir
	cfg := `
		server = false
		bootstrap = false
	    enable_central_service_config = false
		data_dir = "` + dataDir + `"
	`
	a := NewTestAgentWithFields(t, true, TestAgent{HCL: cfg, DataDir: dataDir})
	defer os.RemoveAll(dataDir)
	defer a.Shutdown()

	testCtx, testCancel := context.WithCancel(context.Background())
	defer testCancel()

	testHTTPServer, returnPort := launchHTTPCheckServer(t, testCtx)
	defer func() {
		testHTTPServer.Close()
		returnPort()
	}()

	registerServicesAndChecks := func(t *testing.T, a *TestAgent) {
		// add one persistent service with a simple check
		require.NoError(t, a.AddService(
			&structs.NodeService{
				ID:      "ping",
				Service: "ping",
				Port:    8000,
			},
			[]*structs.CheckType{
				&structs.CheckType{
					HTTP:     testHTTPServer.URL,
					Method:   "GET",
					Interval: 5 * time.Second,
					Timeout:  1 * time.Second,
				},
			},
			true, "", ConfigSourceLocal,
		))

		// add one persistent sidecar service with an alias check in the manner
		// of how sidecar_service would add it
		require.NoError(t, a.AddService(
			&structs.NodeService{
				ID:      "ping-sidecar-proxy",
				Service: "ping-sidecar-proxy",
				Port:    9000,
			},
			[]*structs.CheckType{
				&structs.CheckType{
					Name:         "Connect Sidecar Aliasing ping",
					AliasService: "ping",
				},
			},
			true, "", ConfigSourceLocal,
		))
	}

	retryUntilCheckState := func(t *testing.T, a *TestAgent, checkID string, expectedStatus string) {
		t.Helper()
		retry.Run(t, func(r *retry.R) {
			chk := requireCheckExists(t, a, types.CheckID(checkID))
			if chk.Status != expectedStatus {
				logf(t, a, "check=%q expected status %q but got %q", checkID, expectedStatus, chk.Status)
				r.Fatalf("check=%q expected status %q but got %q", checkID, expectedStatus, chk.Status)
			}
			logf(t, a, "check %q has reached desired status %q", checkID, expectedStatus)
		})
	}

	registerServicesAndChecks(t, a)

	time.Sleep(1 * time.Second)

	retryUntilCheckState(t, a, "service:ping", api.HealthPassing)
	retryUntilCheckState(t, a, "service:ping-sidecar-proxy", api.HealthPassing)

	logf(t, a, "==== POWERING DOWN ORIGINAL ====")

	require.NoError(t, a.Shutdown())

	time.Sleep(1 * time.Second)

	futureHCL := cfg + `
node_id = "` + string(a.Config.NodeID) + `"
node_name = "` + a.Config.NodeName + `"
	`

	restartOnce := func(idx int, t *testing.T) {
		t.Helper()

		// Reload and retain former NodeID and data directory.
		a2 := NewTestAgentWithFields(t, true, TestAgent{HCL: futureHCL, DataDir: dataDir})
		defer a2.Shutdown()
		a = nil

		// reregister during standup; we use an adjustable timing to try and force a race
		sleepDur := time.Duration(idx+1) * 500 * time.Millisecond
		time.Sleep(sleepDur)
		logf(t, a2, "re-registering checks and services after a delay of %v", sleepDur)
		for i := 0; i < 20; i++ { // RACE RACE RACE!
			registerServicesAndChecks(t, a2)
			time.Sleep(50 * time.Millisecond)
		}

		time.Sleep(1 * time.Second)

		retryUntilCheckState(t, a2, "service:ping", api.HealthPassing)

		logf(t, a2, "giving the alias check a chance to notice...")
		time.Sleep(5 * time.Second)

		retryUntilCheckState(t, a2, "service:ping-sidecar-proxy", api.HealthPassing)
	}

	for i := 0; i < 20; i++ {
		name := "restart-" + strconv.Itoa(i)
		ok := t.Run(name, func(t *testing.T) {
			restartOnce(i, t)
		})
		require.True(t, ok, name+" failed")
	}
}

func launchHTTPCheckServer(t *testing.T, ctx context.Context) (srv *httptest.Server, returnPortsFn func()) {
	ports := freeport.MustTake(1)
	port := ports[0]

	addr := net.JoinHostPort("127.0.0.1", strconv.Itoa(port))

	var lc net.ListenConfig
	listener, err := lc.Listen(ctx, "tcp", addr)
	require.NoError(t, err)

	handler := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
		w.WriteHeader(http.StatusOK)
		_, _ = w.Write([]byte("OK\n"))
	})

	srv = &httptest.Server{
		Listener: listener,
		Config:   &http.Server{Handler: handler},
	}
	srv.Start()
	return srv, func() { freeport.Return(ports) }
}

func TestAgent_AddCheck_Alias(t *testing.T) {
	t.Parallel()

	require := require.New(t)
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	health := &structs.HealthCheck{
		Node:    "foo",
		CheckID: "aliashealth",
		Name:    "Alias health check",
		Status:  api.HealthCritical,
	}
	chk := &structs.CheckType{
		AliasService: "foo",
	}
	err := a.AddCheck(health, chk, false, "", ConfigSourceLocal)
	require.NoError(err)

	// Ensure we have a check mapping
	sChk := requireCheckExists(t, a, "aliashealth")
	require.Equal(api.HealthCritical, sChk.Status)

	chkImpl, ok := a.checkAliases[structs.NewCheckID("aliashealth", nil)]
	require.True(ok, "missing aliashealth check")
	require.Equal("", chkImpl.RPCReq.Token)

	cs := a.State.CheckState(structs.NewCheckID("aliashealth", nil))
	require.NotNil(cs)
	require.Equal("", cs.Token)
}

func TestAgent_AddCheck_Alias_setToken(t *testing.T) {
	t.Parallel()

	require := require.New(t)
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	health := &structs.HealthCheck{
		Node:    "foo",
		CheckID: "aliashealth",
		Name:    "Alias health check",
		Status:  api.HealthCritical,
	}
	chk := &structs.CheckType{
		AliasService: "foo",
	}
	err := a.AddCheck(health, chk, false, "foo", ConfigSourceLocal)
	require.NoError(err)

	cs := a.State.CheckState(structs.NewCheckID("aliashealth", nil))
	require.NotNil(cs)
	require.Equal("foo", cs.Token)

	chkImpl, ok := a.checkAliases[structs.NewCheckID("aliashealth", nil)]
	require.True(ok, "missing aliashealth check")
	require.Equal("foo", chkImpl.RPCReq.Token)
}

func TestAgent_AddCheck_Alias_userToken(t *testing.T) {
	t.Parallel()

	require := require.New(t)
	a := NewTestAgent(t, t.Name(), `
acl_token = "hello"
	`)
	defer a.Shutdown()

	health := &structs.HealthCheck{
		Node:    "foo",
		CheckID: "aliashealth",
		Name:    "Alias health check",
		Status:  api.HealthCritical,
	}
	chk := &structs.CheckType{
		AliasService: "foo",
	}
	err := a.AddCheck(health, chk, false, "", ConfigSourceLocal)
	require.NoError(err)

	cs := a.State.CheckState(structs.NewCheckID("aliashealth", nil))
	require.NotNil(cs)
	require.Equal("", cs.Token) // State token should still be empty

	chkImpl, ok := a.checkAliases[structs.NewCheckID("aliashealth", nil)]
	require.True(ok, "missing aliashealth check")
	require.Equal("hello", chkImpl.RPCReq.Token) // Check should use the token
}

func TestAgent_AddCheck_Alias_userAndSetToken(t *testing.T) {
	t.Parallel()

	require := require.New(t)
	a := NewTestAgent(t, t.Name(), `
acl_token = "hello"
	`)
	defer a.Shutdown()

	health := &structs.HealthCheck{
		Node:    "foo",
		CheckID: "aliashealth",
		Name:    "Alias health check",
		Status:  api.HealthCritical,
	}
	chk := &structs.CheckType{
		AliasService: "foo",
	}
	err := a.AddCheck(health, chk, false, "goodbye", ConfigSourceLocal)
	require.NoError(err)

	cs := a.State.CheckState(structs.NewCheckID("aliashealth", nil))
	require.NotNil(cs)
	require.Equal("goodbye", cs.Token)

	chkImpl, ok := a.checkAliases[structs.NewCheckID("aliashealth", nil)]
	require.True(ok, "missing aliashealth check")
	require.Equal("goodbye", chkImpl.RPCReq.Token)
}

func TestAgent_RemoveCheck(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), `
		enable_script_checks = true
	`)
	defer a.Shutdown()

	// Remove check that doesn't exist
	if err := a.RemoveCheck(structs.NewCheckID("mem", nil), false); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Remove without an ID
	if err := a.RemoveCheck(structs.NewCheckID("", nil), false); err == nil {
		t.Fatalf("should have errored")
	}

	health := &structs.HealthCheck{
		Node:    "foo",
		CheckID: "mem",
		Name:    "memory util",
		Status:  api.HealthCritical,
	}
	chk := &structs.CheckType{
		ScriptArgs: []string{"exit", "0"},
		Interval:   15 * time.Second,
	}
	err := a.AddCheck(health, chk, false, "", ConfigSourceLocal)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	// Remove check
	if err := a.RemoveCheck(structs.NewCheckID("mem", nil), false); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Ensure we have a check mapping
	requireCheckMissing(t, a, "mem")

	// Ensure a TTL is setup
	requireCheckMissingMap(t, a.checkMonitors, "mem")
}

func TestAgent_HTTPCheck_TLSSkipVerify(t *testing.T) {
	t.Parallel()

	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintln(w, "GOOD")
	})
	server := httptest.NewTLSServer(handler)
	defer server.Close()

	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	health := &structs.HealthCheck{
		Node:    "foo",
		CheckID: "tls",
		Name:    "tls check",
		Status:  api.HealthCritical,
	}
	chk := &structs.CheckType{
		HTTP:          server.URL,
		Interval:      20 * time.Millisecond,
		TLSSkipVerify: true,
	}

	err := a.AddCheck(health, chk, false, "", ConfigSourceLocal)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	retry.Run(t, func(r *retry.R) {
		status := getCheck(a, "tls")
		if status.Status != api.HealthPassing {
			r.Fatalf("bad: %v", status.Status)
		}
		if !strings.Contains(status.Output, "GOOD") {
			r.Fatalf("bad: %v", status.Output)
		}
	})

}

func TestAgent_HTTPCheck_EnableAgentTLSForChecks(t *testing.T) {
	t.Parallel()

	run := func(t *testing.T, ca string) {
		a := NewTestAgentWithFields(t, true, TestAgent{
			Name:   t.Name(),
			UseTLS: true,
			HCL: `
				enable_agent_tls_for_checks = true

				verify_incoming = true
				server_name = "consul.test"
				key_file = "../test/client_certs/server.key"
				cert_file = "../test/client_certs/server.crt"
			` + ca,
		})
		defer a.Shutdown()

		health := &structs.HealthCheck{
			Node:    "foo",
			CheckID: "tls",
			Name:    "tls check",
			Status:  api.HealthCritical,
		}

		url := fmt.Sprintf("https://%s/v1/agent/self", a.srv.ln.Addr().String())
		chk := &structs.CheckType{
			HTTP:     url,
			Interval: 20 * time.Millisecond,
		}

		err := a.AddCheck(health, chk, false, "", ConfigSourceLocal)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		retry.Run(t, func(r *retry.R) {
			status := getCheck(a, "tls")
			if status.Status != api.HealthPassing {
				r.Fatalf("bad: %v", status.Status)
			}
			if !strings.Contains(status.Output, "200 OK") {
				r.Fatalf("bad: %v", status.Output)
			}
		})
	}

	// We need to test both methods of passing the CA info to ensure that
	// we propagate all the fields correctly. All the other fields are
	// covered by the HCL in the test run function.
	tests := []struct {
		desc   string
		config string
	}{
		{"ca_file", `ca_file = "../test/client_certs/rootca.crt"`},
		{"ca_path", `ca_path = "../test/client_certs/path"`},
	}
	for _, tt := range tests {
		t.Run(tt.desc, func(t *testing.T) {
			run(t, tt.config)
		})
	}
}

func TestAgent_updateTTLCheck(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	checkBufSize := 100
	health := &structs.HealthCheck{
		Node:    "foo",
		CheckID: "mem",
		Name:    "memory util",
		Status:  api.HealthCritical,
	}
	chk := &structs.CheckType{
		TTL:           15 * time.Second,
		OutputMaxSize: checkBufSize,
	}

	// Add check and update it.
	err := a.AddCheck(health, chk, false, "", ConfigSourceLocal)
	if err != nil {
		t.Fatalf("err: %v", err)
	}
	if err := a.updateTTLCheck(structs.NewCheckID("mem", nil), api.HealthPassing, "foo"); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Ensure we have a check mapping.
	status := getCheck(a, "mem")
	if status.Status != api.HealthPassing {
		t.Fatalf("bad: %v", status)
	}
	if status.Output != "foo" {
		t.Fatalf("bad: %v", status)
	}

	if err := a.updateTTLCheck(structs.NewCheckID("mem", nil), api.HealthCritical, strings.Repeat("--bad-- ", 5*checkBufSize)); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Ensure we have a check mapping.
	status = getCheck(a, "mem")
	if status.Status != api.HealthCritical {
		t.Fatalf("bad: %v", status)
	}
	if len(status.Output) > checkBufSize*2 {
		t.Fatalf("bad: %v", len(status.Output))
	}
}

func TestAgent_PersistService(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_PersistService(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_PersistService(t, "enable_central_service_config = true")
	})
}

func testAgent_PersistService(t *testing.T, extraHCL string) {
	t.Helper()

	dataDir := testutil.TempDir(t, "agent") // we manage the data dir
	defer os.RemoveAll(dataDir)

	cfg := `
		server = false
		bootstrap = false
		data_dir = "` + dataDir + `"
	` + extraHCL
	a := NewTestAgentWithFields(t, true, TestAgent{HCL: cfg, DataDir: dataDir})
	defer a.Shutdown()

	svc := &structs.NodeService{
		ID:      "redis",
		Service: "redis",
		Tags:    []string{"foo"},
		Port:    8000,
	}

	file := filepath.Join(a.Config.DataDir, servicesDir, stringHash(svc.ID))

	// Check is not persisted unless requested
	if err := a.AddService(svc, nil, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}
	if _, err := os.Stat(file); err == nil {
		t.Fatalf("should not persist")
	}

	// Persists to file if requested
	if err := a.AddService(svc, nil, true, "mytoken", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}
	if _, err := os.Stat(file); err != nil {
		t.Fatalf("err: %s", err)
	}
	expected, err := json.Marshal(persistedService{
		Token:   "mytoken",
		Service: svc,
		Source:  "local",
	})
	if err != nil {
		t.Fatalf("err: %s", err)
	}
	content, err := ioutil.ReadFile(file)
	if err != nil {
		t.Fatalf("err: %s", err)
	}
	if !bytes.Equal(expected, content) {
		t.Fatalf("bad: %s", string(content))
	}

	// Updates service definition on disk
	svc.Port = 8001
	if err := a.AddService(svc, nil, true, "mytoken", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}
	expected, err = json.Marshal(persistedService{
		Token:   "mytoken",
		Service: svc,
		Source:  "local",
	})
	if err != nil {
		t.Fatalf("err: %s", err)
	}
	content, err = ioutil.ReadFile(file)
	if err != nil {
		t.Fatalf("err: %s", err)
	}
	if !bytes.Equal(expected, content) {
		t.Fatalf("bad: %s", string(content))
	}
	a.Shutdown()

	// Should load it back during later start
	a2 := NewTestAgentWithFields(t, true, TestAgent{HCL: cfg, DataDir: dataDir})
	defer a2.Shutdown()

	restored := a2.State.ServiceState(structs.NewServiceID(svc.ID, nil))
	if restored == nil {
		t.Fatalf("service %q missing", svc.ID)
	}
	if got, want := restored.Token, "mytoken"; got != want {
		t.Fatalf("got token %q want %q", got, want)
	}
	if got, want := restored.Service.Port, 8001; got != want {
		t.Fatalf("got port %d want %d", got, want)
	}
}

func TestAgent_persistedService_compat(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_persistedService_compat(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_persistedService_compat(t, "enable_central_service_config = true")
	})
}

func testAgent_persistedService_compat(t *testing.T, extraHCL string) {
	t.Helper()

	// Tests backwards compatibility of persisted services from pre-0.5.1
	a := NewTestAgent(t, t.Name(), extraHCL)
	defer a.Shutdown()

	svc := &structs.NodeService{
		ID:              "redis",
		Service:         "redis",
		Tags:            []string{"foo"},
		Port:            8000,
		TaggedAddresses: map[string]structs.ServiceAddress{},
		Weights:         &structs.Weights{Passing: 1, Warning: 1},
		EnterpriseMeta:  *structs.DefaultEnterpriseMeta(),
	}

	// Encode the NodeService directly. This is what previous versions
	// would serialize to the file (without the wrapper)
	encoded, err := json.Marshal(svc)
	if err != nil {
		t.Fatalf("err: %s", err)
	}

	// Write the content to the file
	file := filepath.Join(a.Config.DataDir, servicesDir, stringHash(svc.ID))
	if err := os.MkdirAll(filepath.Dir(file), 0700); err != nil {
		t.Fatalf("err: %s", err)
	}
	if err := ioutil.WriteFile(file, encoded, 0600); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Load the services
	if err := a.loadServices(a.Config, nil); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Ensure the service was restored
	result := requireServiceExists(t, a, "redis")
	require.Equal(t, svc, result)
}

func TestAgent_PurgeService(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_PurgeService(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_PurgeService(t, "enable_central_service_config = true")
	})
}

func testAgent_PurgeService(t *testing.T, extraHCL string) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), extraHCL)
	defer a.Shutdown()

	svc := &structs.NodeService{
		ID:      "redis",
		Service: "redis",
		Tags:    []string{"foo"},
		Port:    8000,
	}

	file := filepath.Join(a.Config.DataDir, servicesDir, stringHash(svc.ID))
	if err := a.AddService(svc, nil, true, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}
	// Exists
	if _, err := os.Stat(file); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Not removed
	if err := a.removeService(structs.NewServiceID(svc.ID, nil), false); err != nil {
		t.Fatalf("err: %s", err)
	}
	if _, err := os.Stat(file); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Re-add the service
	if err := a.AddService(svc, nil, true, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Removed
	if err := a.removeService(structs.NewServiceID(svc.ID, nil), true); err != nil {
		t.Fatalf("err: %s", err)
	}
	if _, err := os.Stat(file); !os.IsNotExist(err) {
		t.Fatalf("bad: %#v", err)
	}
}

func TestAgent_PurgeServiceOnDuplicate(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_PurgeServiceOnDuplicate(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_PurgeServiceOnDuplicate(t, "enable_central_service_config = true")
	})
}

func testAgent_PurgeServiceOnDuplicate(t *testing.T, extraHCL string) {
	t.Helper()

	dataDir := testutil.TempDir(t, "agent") // we manage the data dir
	defer os.RemoveAll(dataDir)

	cfg := `
		data_dir = "` + dataDir + `"
		server = false
		bootstrap = false
	` + extraHCL
	a := NewTestAgentWithFields(t, true, TestAgent{HCL: cfg, DataDir: dataDir})
	defer a.Shutdown()

	svc1 := &structs.NodeService{
		ID:      "redis",
		Service: "redis",
		Tags:    []string{"foo"},
		Port:    8000,
	}

	// First persist the service
	require.NoError(t, a.AddService(svc1, nil, true, "", ConfigSourceLocal))
	a.Shutdown()

	// Try bringing the agent back up with the service already
	// existing in the config
	a2 := NewTestAgentWithFields(t, true, TestAgent{Name: t.Name() + "-a2", HCL: cfg + `
		service = {
			id = "redis"
			name = "redis"
			tags = ["bar"]
			port = 9000
		}
	`, DataDir: dataDir})
	defer a2.Shutdown()

	sid := svc1.CompoundServiceID()
	file := filepath.Join(a.Config.DataDir, servicesDir, sid.StringHash())
	_, err := os.Stat(file)
	require.Error(t, err, "should have removed persisted service")
	result := requireServiceExists(t, a, "redis")
	require.NotEqual(t, []string{"bar"}, result.Tags)
	require.NotEqual(t, 9000, result.Port)
}

func TestAgent_PersistCheck(t *testing.T) {
	t.Parallel()
	dataDir := testutil.TempDir(t, "agent") // we manage the data dir
	cfg := `
		data_dir = "` + dataDir + `"
		server = false
		bootstrap = false
		enable_script_checks = true
	`
	a := NewTestAgentWithFields(t, true, TestAgent{HCL: cfg, DataDir: dataDir})
	defer os.RemoveAll(dataDir)
	defer a.Shutdown()

	check := &structs.HealthCheck{
		Node:    a.config.NodeName,
		CheckID: "mem",
		Name:    "memory check",
		Status:  api.HealthPassing,
	}
	chkType := &structs.CheckType{
		ScriptArgs: []string{"/bin/true"},
		Interval:   10 * time.Second,
	}

	cid := check.CompoundCheckID()
	file := filepath.Join(a.Config.DataDir, checksDir, cid.StringHash())

	// Not persisted if not requested
	require.NoError(t, a.AddCheck(check, chkType, false, "", ConfigSourceLocal))
	_, err := os.Stat(file)
	require.Error(t, err, "should not persist")

	// Should persist if requested
	require.NoError(t, a.AddCheck(check, chkType, true, "mytoken", ConfigSourceLocal))
	_, err = os.Stat(file)
	require.NoError(t, err)

	expected, err := json.Marshal(persistedCheck{
		Check:   check,
		ChkType: chkType,
		Token:   "mytoken",
		Source:  "local",
	})
	require.NoError(t, err)

	content, err := ioutil.ReadFile(file)
	require.NoError(t, err)

	require.Equal(t, expected, content)

	// Updates the check definition on disk
	check.Name = "mem1"
	require.NoError(t, a.AddCheck(check, chkType, true, "mytoken", ConfigSourceLocal))
	expected, err = json.Marshal(persistedCheck{
		Check:   check,
		ChkType: chkType,
		Token:   "mytoken",
		Source:  "local",
	})
	require.NoError(t, err)
	content, err = ioutil.ReadFile(file)
	require.NoError(t, err)
	require.Equal(t, expected, content)
	a.Shutdown()

	// Should load it back during later start
	a2 := NewTestAgentWithFields(t, true, TestAgent{Name: t.Name() + "-a2", HCL: cfg, DataDir: dataDir})
	defer a2.Shutdown()

	result := requireCheckExists(t, a2, check.CheckID)
	require.Equal(t, api.HealthCritical, result.Status)
	require.Equal(t, "mem1", result.Name)

	// Should have restored the monitor
	requireCheckExistsMap(t, a2.checkMonitors, check.CheckID)
	chkState := a2.State.CheckState(structs.NewCheckID(check.CheckID, nil))
	require.NotNil(t, chkState)
	require.Equal(t, "mytoken", chkState.Token)
}

func TestAgent_PurgeCheck(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	check := &structs.HealthCheck{
		Node:    a.Config.NodeName,
		CheckID: "mem",
		Name:    "memory check",
		Status:  api.HealthPassing,
	}

	file := filepath.Join(a.Config.DataDir, checksDir, checkIDHash(check.CheckID))
	if err := a.AddCheck(check, nil, true, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Not removed
	if err := a.RemoveCheck(structs.NewCheckID(check.CheckID, nil), false); err != nil {
		t.Fatalf("err: %s", err)
	}
	if _, err := os.Stat(file); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Removed
	if err := a.RemoveCheck(structs.NewCheckID(check.CheckID, nil), true); err != nil {
		t.Fatalf("err: %s", err)
	}
	if _, err := os.Stat(file); !os.IsNotExist(err) {
		t.Fatalf("bad: %#v", err)
	}
}

func TestAgent_PurgeCheckOnDuplicate(t *testing.T) {
	t.Parallel()
	nodeID := NodeID()
	dataDir := testutil.TempDir(t, "agent")
	a := NewTestAgentWithFields(t, true, TestAgent{
		Name:    t.Name(),
		DataDir: dataDir,
		HCL: `
	    node_id = "` + nodeID + `"
	    node_name = "Node ` + nodeID + `"
		data_dir = "` + dataDir + `"
		server = false
		bootstrap = false
		enable_script_checks = true
	`})
	defer os.RemoveAll(dataDir)
	defer a.Shutdown()

	check1 := &structs.HealthCheck{
		Node:           a.Config.NodeName,
		CheckID:        "mem",
		Name:           "memory check",
		Status:         api.HealthPassing,
		EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
	}

	// First persist the check
	if err := a.AddCheck(check1, nil, true, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}
	a.Shutdown()

	// Start again with the check registered in config
	a2 := NewTestAgentWithFields(t, true, TestAgent{
		Name:    t.Name() + "-a2",
		DataDir: dataDir,
		HCL: `
	    node_id = "` + nodeID + `"
	    node_name = "Node ` + nodeID + `"
		data_dir = "` + dataDir + `"
		server = false
		bootstrap = false
		enable_script_checks = true
		check = {
			id = "mem"
			name = "memory check"
			notes = "my cool notes"
			args = ["/bin/check-redis.py"]
			interval = "30s"
		}
	`})
	defer a2.Shutdown()

	cid := check1.CompoundCheckID()
	file := filepath.Join(dataDir, checksDir, cid.StringHash())
	if _, err := os.Stat(file); err == nil {
		t.Fatalf("should have removed persisted check")
	}
	result := requireCheckExists(t, a2, "mem")
	expected := &structs.HealthCheck{
		Node:           a2.Config.NodeName,
		CheckID:        "mem",
		Name:           "memory check",
		Status:         api.HealthCritical,
		Notes:          "my cool notes",
		EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
	}
	require.Equal(t, expected, result)
}

func TestAgent_loadChecks_token(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), `
		check = {
			id = "rabbitmq"
			name = "rabbitmq"
			token = "abc123"
			ttl = "10s"
		}
	`)
	defer a.Shutdown()

	requireCheckExists(t, a, "rabbitmq")
	require.Equal(t, "abc123", a.State.CheckToken(structs.NewCheckID("rabbitmq", nil)))
}

func TestAgent_unloadChecks(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	// First register a service
	svc := &structs.NodeService{
		ID:      "redis",
		Service: "redis",
		Tags:    []string{"foo"},
		Port:    8000,
	}
	if err := a.AddService(svc, nil, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Register a check
	check1 := &structs.HealthCheck{
		Node:        a.Config.NodeName,
		CheckID:     "service:redis",
		Name:        "redischeck",
		Status:      api.HealthPassing,
		ServiceID:   "redis",
		ServiceName: "redis",
	}
	if err := a.AddCheck(check1, nil, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %s", err)
	}

	requireCheckExists(t, a, check1.CheckID)

	// Unload all of the checks
	if err := a.unloadChecks(); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Make sure it was unloaded
	requireCheckMissing(t, a, check1.CheckID)
}

func TestAgent_loadServices_token(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_loadServices_token(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_loadServices_token(t, "enable_central_service_config = true")
	})
}

func testAgent_loadServices_token(t *testing.T, extraHCL string) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), `
		service = {
			id = "rabbitmq"
			name = "rabbitmq"
			port = 5672
			token = "abc123"
		}
	`+extraHCL)
	defer a.Shutdown()

	requireServiceExists(t, a, "rabbitmq")
	if token := a.State.ServiceToken(structs.NewServiceID("rabbitmq", nil)); token != "abc123" {
		t.Fatalf("bad: %s", token)
	}
}

func TestAgent_loadServices_sidecar(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_loadServices_sidecar(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_loadServices_sidecar(t, "enable_central_service_config = true")
	})
}

func testAgent_loadServices_sidecar(t *testing.T, extraHCL string) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), `
		service = {
			id = "rabbitmq"
			name = "rabbitmq"
			port = 5672
			token = "abc123"
			connect = {
				sidecar_service {}
			}
		}
	`+extraHCL)
	defer a.Shutdown()

	svc := requireServiceExists(t, a, "rabbitmq")
	if token := a.State.ServiceToken(structs.NewServiceID("rabbitmq", nil)); token != "abc123" {
		t.Fatalf("bad: %s", token)
	}
	requireServiceExists(t, a, "rabbitmq-sidecar-proxy")
	if token := a.State.ServiceToken(structs.NewServiceID("rabbitmq-sidecar-proxy", nil)); token != "abc123" {
		t.Fatalf("bad: %s", token)
	}

	// Sanity check rabbitmq service should NOT have sidecar info in state since
	// it's done it's job and should be a registration syntax sugar only.
	assert.Nil(t, svc.Connect.SidecarService)
}

func TestAgent_loadServices_sidecarSeparateToken(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_loadServices_sidecarSeparateToken(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_loadServices_sidecarSeparateToken(t, "enable_central_service_config = true")
	})
}

func testAgent_loadServices_sidecarSeparateToken(t *testing.T, extraHCL string) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), `
		service = {
			id = "rabbitmq"
			name = "rabbitmq"
			port = 5672
			token = "abc123"
			connect = {
				sidecar_service {
					token = "789xyz"
				}
			}
		}
	`+extraHCL)
	defer a.Shutdown()

	requireServiceExists(t, a, "rabbitmq")
	if token := a.State.ServiceToken(structs.NewServiceID("rabbitmq", nil)); token != "abc123" {
		t.Fatalf("bad: %s", token)
	}
	requireServiceExists(t, a, "rabbitmq-sidecar-proxy")
	if token := a.State.ServiceToken(structs.NewServiceID("rabbitmq-sidecar-proxy", nil)); token != "789xyz" {
		t.Fatalf("bad: %s", token)
	}
}

func TestAgent_loadServices_sidecarInheritMeta(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_loadServices_sidecarInheritMeta(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_loadServices_sidecarInheritMeta(t, "enable_central_service_config = true")
	})
}

func testAgent_loadServices_sidecarInheritMeta(t *testing.T, extraHCL string) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), `
		service = {
			id = "rabbitmq"
			name = "rabbitmq"
			port = 5672
			tags = ["a", "b"],
			meta = {
				environment = "prod"
			}
			connect = {
				sidecar_service {

				}
			}
		}
	`+extraHCL)
	defer a.Shutdown()

	svc := requireServiceExists(t, a, "rabbitmq")
	require.Len(t, svc.Tags, 2)
	require.Len(t, svc.Meta, 1)

	sidecar := requireServiceExists(t, a, "rabbitmq-sidecar-proxy")
	require.ElementsMatch(t, svc.Tags, sidecar.Tags)
	require.Len(t, sidecar.Meta, 1)
	meta, ok := sidecar.Meta["environment"]
	require.True(t, ok, "missing sidecar service meta")
	require.Equal(t, "prod", meta)
}

func TestAgent_loadServices_sidecarOverrideMeta(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_loadServices_sidecarOverrideMeta(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_loadServices_sidecarOverrideMeta(t, "enable_central_service_config = true")
	})
}

func testAgent_loadServices_sidecarOverrideMeta(t *testing.T, extraHCL string) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), `
		service = {
			id = "rabbitmq"
			name = "rabbitmq"
			port = 5672
			tags = ["a", "b"],
			meta = {
				environment = "prod"
			}
			connect = {
				sidecar_service {
					tags = ["foo"],
					meta = {
						environment = "qa"
					}
				}
			}
		}
	`+extraHCL)
	defer a.Shutdown()

	svc := requireServiceExists(t, a, "rabbitmq")
	require.Len(t, svc.Tags, 2)
	require.Len(t, svc.Meta, 1)

	sidecar := requireServiceExists(t, a, "rabbitmq-sidecar-proxy")
	require.Len(t, sidecar.Tags, 1)
	require.Equal(t, "foo", sidecar.Tags[0])
	require.Len(t, sidecar.Meta, 1)
	meta, ok := sidecar.Meta["environment"]
	require.True(t, ok, "missing sidecar service meta")
	require.Equal(t, "qa", meta)
}

func TestAgent_unloadServices(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_unloadServices(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_unloadServices(t, "enable_central_service_config = true")
	})
}

func testAgent_unloadServices(t *testing.T, extraHCL string) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), extraHCL)
	defer a.Shutdown()

	svc := &structs.NodeService{
		ID:      "redis",
		Service: "redis",
		Tags:    []string{"foo"},
		Port:    8000,
	}

	// Register the service
	if err := a.AddService(svc, nil, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}

	requireServiceExists(t, a, svc.ID)

	// Unload all services
	if err := a.unloadServices(); err != nil {
		t.Fatalf("err: %s", err)
	}
	if len(a.State.Services(structs.WildcardEnterpriseMeta())) != 0 {
		t.Fatalf("should have unloaded services")
	}
}

func TestAgent_Service_MaintenanceMode(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	svc := &structs.NodeService{
		ID:      "redis",
		Service: "redis",
		Tags:    []string{"foo"},
		Port:    8000,
	}

	// Register the service
	if err := a.AddService(svc, nil, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}

	sid := structs.NewServiceID("redis", nil)
	// Enter maintenance mode for the service
	if err := a.EnableServiceMaintenance(sid, "broken", "mytoken"); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Make sure the critical health check was added
	checkID := serviceMaintCheckID(sid)
	check := a.State.Check(checkID)
	if check == nil {
		t.Fatalf("should have registered critical maintenance check")
	}

	// Check that the token was used to register the check
	if token := a.State.CheckToken(checkID); token != "mytoken" {
		t.Fatalf("expected 'mytoken', got: '%s'", token)
	}

	// Ensure the reason was set in notes
	if check.Notes != "broken" {
		t.Fatalf("bad: %#v", check)
	}

	// Leave maintenance mode
	if err := a.DisableServiceMaintenance(sid); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Ensure the check was deregistered

	if found := a.State.Check(checkID); found != nil {
		t.Fatalf("should have deregistered maintenance check")
	}

	// Enter service maintenance mode without providing a reason
	if err := a.EnableServiceMaintenance(sid, "", ""); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Ensure the check was registered with the default notes
	check = a.State.Check(checkID)
	if check == nil {
		t.Fatalf("should have registered critical check")
	}
	if check.Notes != defaultServiceMaintReason {
		t.Fatalf("bad: %#v", check)
	}
}

func TestAgent_Service_Reap(t *testing.T) {
	// t.Parallel() // timing test. no parallel
	a := NewTestAgent(t, t.Name(), `
		check_reap_interval = "50ms"
		check_deregister_interval_min = "0s"
	`)
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	svc := &structs.NodeService{
		ID:      "redis",
		Service: "redis",
		Tags:    []string{"foo"},
		Port:    8000,
	}
	chkTypes := []*structs.CheckType{
		&structs.CheckType{
			Status:                         api.HealthPassing,
			TTL:                            25 * time.Millisecond,
			DeregisterCriticalServiceAfter: 200 * time.Millisecond,
		},
	}

	// Register the service.
	if err := a.AddService(svc, chkTypes, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Make sure it's there and there's no critical check yet.
	requireServiceExists(t, a, "redis")
	require.Len(t, a.State.CriticalCheckStates(structs.WildcardEnterpriseMeta()), 0, "should not have critical checks")

	// Wait for the check TTL to fail but before the check is reaped.
	time.Sleep(100 * time.Millisecond)
	requireServiceExists(t, a, "redis")
	require.Len(t, a.State.CriticalCheckStates(nil), 1, "should have 1 critical check")

	// Pass the TTL.
	if err := a.updateTTLCheck(structs.NewCheckID("service:redis", nil), api.HealthPassing, "foo"); err != nil {
		t.Fatalf("err: %v", err)
	}
	requireServiceExists(t, a, "redis")
	require.Len(t, a.State.CriticalCheckStates(structs.WildcardEnterpriseMeta()), 0, "should not have critical checks")

	// Wait for the check TTL to fail again.
	time.Sleep(100 * time.Millisecond)
	requireServiceExists(t, a, "redis")
	require.Len(t, a.State.CriticalCheckStates(structs.WildcardEnterpriseMeta()), 1, "should have 1 critical check")

	// Wait for the reap.
	time.Sleep(400 * time.Millisecond)
	requireServiceMissing(t, a, "redis")
	require.Len(t, a.State.CriticalCheckStates(structs.WildcardEnterpriseMeta()), 0, "should not have critical checks")
}

func TestAgent_Service_NoReap(t *testing.T) {
	// t.Parallel() // timing test. no parallel
	a := NewTestAgent(t, t.Name(), `
		check_reap_interval = "50ms"
		check_deregister_interval_min = "0s"
	`)
	defer a.Shutdown()

	svc := &structs.NodeService{
		ID:      "redis",
		Service: "redis",
		Tags:    []string{"foo"},
		Port:    8000,
	}
	chkTypes := []*structs.CheckType{
		&structs.CheckType{
			Status: api.HealthPassing,
			TTL:    25 * time.Millisecond,
		},
	}

	// Register the service.
	if err := a.AddService(svc, chkTypes, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Make sure it's there and there's no critical check yet.
	requireServiceExists(t, a, "redis")
	require.Len(t, a.State.CriticalCheckStates(structs.WildcardEnterpriseMeta()), 0)

	// Wait for the check TTL to fail.
	time.Sleep(200 * time.Millisecond)
	requireServiceExists(t, a, "redis")
	require.Len(t, a.State.CriticalCheckStates(structs.WildcardEnterpriseMeta()), 1)

	// Wait a while and make sure it doesn't reap.
	time.Sleep(200 * time.Millisecond)
	requireServiceExists(t, a, "redis")
	require.Len(t, a.State.CriticalCheckStates(structs.WildcardEnterpriseMeta()), 1)
}

func TestAgent_AddService_restoresSnapshot(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		t.Parallel()
		testAgent_AddService_restoresSnapshot(t, "")
	})
	t.Run("service manager", func(t *testing.T) {
		t.Parallel()
		testAgent_AddService_restoresSnapshot(t, "enable_central_service_config = true")
	})
}

func testAgent_AddService_restoresSnapshot(t *testing.T, extraHCL string) {
	t.Helper()

	a := NewTestAgent(t, t.Name(), extraHCL)
	defer a.Shutdown()

	// First register a service
	svc := &structs.NodeService{
		ID:      "redis",
		Service: "redis",
		Tags:    []string{"foo"},
		Port:    8000,
	}
	require.NoError(t, a.AddService(svc, nil, false, "", ConfigSourceLocal))

	// Register a check
	check1 := &structs.HealthCheck{
		Node:        a.Config.NodeName,
		CheckID:     "service:redis",
		Name:        "redischeck",
		Status:      api.HealthPassing,
		ServiceID:   "redis",
		ServiceName: "redis",
	}
	require.NoError(t, a.AddCheck(check1, nil, false, "", ConfigSourceLocal))

	// Re-registering the service preserves the state of the check
	chkTypes := []*structs.CheckType{&structs.CheckType{TTL: 30 * time.Second}}
	require.NoError(t, a.AddService(svc, chkTypes, false, "", ConfigSourceLocal))
	check := requireCheckExists(t, a, "service:redis")
	require.Equal(t, api.HealthPassing, check.Status)
}

func TestAgent_AddCheck_restoresSnapshot(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	// First register a service
	svc := &structs.NodeService{
		ID:      "redis",
		Service: "redis",
		Tags:    []string{"foo"},
		Port:    8000,
	}
	if err := a.AddService(svc, nil, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Register a check
	check1 := &structs.HealthCheck{
		Node:        a.Config.NodeName,
		CheckID:     "service:redis",
		Name:        "redischeck",
		Status:      api.HealthPassing,
		ServiceID:   "redis",
		ServiceName: "redis",
	}
	if err := a.AddCheck(check1, nil, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Re-registering the check preserves its state
	check1.Status = ""
	if err := a.AddCheck(check1, &structs.CheckType{TTL: 30 * time.Second}, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %s", err)
	}
	check := requireCheckExists(t, a, "service:redis")
	if check.Status != api.HealthPassing {
		t.Fatalf("bad: %s", check.Status)
	}
}

func TestAgent_NodeMaintenanceMode(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	// Enter maintenance mode for the node
	a.EnableNodeMaintenance("broken", "mytoken")

	// Make sure the critical health check was added
	check := requireCheckExists(t, a, structs.NodeMaint)

	// Check that the token was used to register the check
	if token := a.State.CheckToken(structs.NodeMaintCheckID); token != "mytoken" {
		t.Fatalf("expected 'mytoken', got: '%s'", token)
	}

	// Ensure the reason was set in notes
	if check.Notes != "broken" {
		t.Fatalf("bad: %#v", check)
	}

	// Leave maintenance mode
	a.DisableNodeMaintenance()

	// Ensure the check was deregistered
	requireCheckMissing(t, a, structs.NodeMaint)

	// Enter maintenance mode without passing a reason
	a.EnableNodeMaintenance("", "")

	// Make sure the check was registered with the default note
	check = requireCheckExists(t, a, structs.NodeMaint)
	if check.Notes != defaultNodeMaintReason {
		t.Fatalf("bad: %#v", check)
	}
}

func TestAgent_checkStateSnapshot(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	// First register a service
	svc := &structs.NodeService{
		ID:      "redis",
		Service: "redis",
		Tags:    []string{"foo"},
		Port:    8000,
	}
	if err := a.AddService(svc, nil, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Register a check
	check1 := &structs.HealthCheck{
		Node:        a.Config.NodeName,
		CheckID:     "service:redis",
		Name:        "redischeck",
		Status:      api.HealthPassing,
		ServiceID:   "redis",
		ServiceName: "redis",
	}
	if err := a.AddCheck(check1, nil, true, "", ConfigSourceLocal); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Snapshot the state
	snap := a.snapshotCheckState()

	// Unload all of the checks
	if err := a.unloadChecks(); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Reload the checks and restore the snapshot.
	if err := a.loadChecks(a.Config, snap); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Search for the check
	out := requireCheckExists(t, a, check1.CheckID)

	// Make sure state was restored
	if out.Status != api.HealthPassing {
		t.Fatalf("should have restored check state")
	}
}

func TestAgent_loadChecks_checkFails(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	// Persist a health check with an invalid service ID
	check := &structs.HealthCheck{
		Node:      a.Config.NodeName,
		CheckID:   "service:redis",
		Name:      "redischeck",
		Status:    api.HealthPassing,
		ServiceID: "nope",
	}
	if err := a.persistCheck(check, nil, ConfigSourceLocal); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Check to make sure the check was persisted
	checkHash := checkIDHash(check.CheckID)
	checkPath := filepath.Join(a.Config.DataDir, checksDir, checkHash)
	if _, err := os.Stat(checkPath); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Try loading the checks from the persisted files
	if err := a.loadChecks(a.Config, nil); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Ensure the erroneous check was purged
	if _, err := os.Stat(checkPath); err == nil {
		t.Fatalf("should have purged check")
	}
}

func TestAgent_persistCheckState(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	cid := structs.NewCheckID("check1", nil)
	// Create the TTL check to persist
	check := &checks.CheckTTL{
		CheckID: cid,
		TTL:     10 * time.Minute,
	}

	// Persist some check state for the check
	err := a.persistCheckState(check, api.HealthCritical, "nope")
	if err != nil {
		t.Fatalf("err: %s", err)
	}

	// Check the persisted file exists and has the content
	file := filepath.Join(a.Config.DataDir, checkStateDir, cid.StringHash())
	buf, err := ioutil.ReadFile(file)
	if err != nil {
		t.Fatalf("err: %s", err)
	}

	// Decode the state
	var p persistedCheckState
	if err := json.Unmarshal(buf, &p); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Check the fields
	if p.CheckID != cid.ID {
		t.Fatalf("bad: %#v", p)
	}
	if p.Output != "nope" {
		t.Fatalf("bad: %#v", p)
	}
	if p.Status != api.HealthCritical {
		t.Fatalf("bad: %#v", p)
	}

	// Check the expiration time was set
	if p.Expires < time.Now().Unix() {
		t.Fatalf("bad: %#v", p)
	}
}

func TestAgent_loadCheckState(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	// Create a check whose state will expire immediately
	check := &checks.CheckTTL{
		CheckID: structs.NewCheckID("check1", nil),
		TTL:     0,
	}

	// Persist the check state
	err := a.persistCheckState(check, api.HealthPassing, "yup")
	if err != nil {
		t.Fatalf("err: %s", err)
	}

	// Try to load the state
	health := &structs.HealthCheck{
		CheckID: "check1",
		Status:  api.HealthCritical,
	}
	if err := a.loadCheckState(health); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Should not have restored the status due to expiration
	if health.Status != api.HealthCritical {
		t.Fatalf("bad: %#v", health)
	}
	if health.Output != "" {
		t.Fatalf("bad: %#v", health)
	}

	// Should have purged the state
	file := filepath.Join(a.Config.DataDir, checksDir, stringHash("check1"))
	if _, err := os.Stat(file); !os.IsNotExist(err) {
		t.Fatalf("should have purged state")
	}

	// Set a TTL which will not expire before we check it
	check.TTL = time.Minute
	err = a.persistCheckState(check, api.HealthPassing, "yup")
	if err != nil {
		t.Fatalf("err: %s", err)
	}

	// Try to load
	if err := a.loadCheckState(health); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Should have restored
	if health.Status != api.HealthPassing {
		t.Fatalf("bad: %#v", health)
	}
	if health.Output != "yup" {
		t.Fatalf("bad: %#v", health)
	}
}

func TestAgent_purgeCheckState(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	cid := structs.NewCheckID("check1", nil)
	// No error if the state does not exist
	if err := a.purgeCheckState(cid); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Persist some state to the data dir
	check := &checks.CheckTTL{
		CheckID: cid,
		TTL:     time.Minute,
	}
	err := a.persistCheckState(check, api.HealthPassing, "yup")
	if err != nil {
		t.Fatalf("err: %s", err)
	}

	// Purge the check state
	if err := a.purgeCheckState(cid); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Removed the file
	file := filepath.Join(a.Config.DataDir, checkStateDir, cid.StringHash())
	if _, err := os.Stat(file); !os.IsNotExist(err) {
		t.Fatalf("should have removed file")
	}
}

func TestAgent_GetCoordinate(t *testing.T) {
	t.Parallel()
	check := func(server bool) {
		a := NewTestAgent(t, t.Name(), `
			server = true
		`)
		defer a.Shutdown()

		// This doesn't verify the returned coordinate, but it makes
		// sure that the agent chooses the correct Serf instance,
		// depending on how it's configured as a client or a server.
		// If it chooses the wrong one, this will crash.
		if _, err := a.GetLANCoordinate(); err != nil {
			t.Fatalf("err: %s", err)
		}
	}

	check(true)
	check(false)
}

func TestAgent_reloadWatches(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	// Normal watch with http addr set, should succeed
	newConf := *a.config
	newConf.Watches = []map[string]interface{}{
		{
			"type": "key",
			"key":  "asdf",
			"args": []interface{}{"ls"},
		},
	}
	if err := a.reloadWatches(&newConf); err != nil {
		t.Fatalf("bad: %s", err)
	}

	// Should fail to reload with connect watches
	newConf.Watches = []map[string]interface{}{
		{
			"type": "connect_roots",
			"key":  "asdf",
			"args": []interface{}{"ls"},
		},
	}
	if err := a.reloadWatches(&newConf); err == nil || !strings.Contains(err.Error(), "not allowed in agent config") {
		t.Fatalf("bad: %s", err)
	}

	// Should still succeed with only HTTPS addresses
	newConf.HTTPSAddrs = newConf.HTTPAddrs
	newConf.HTTPAddrs = make([]net.Addr, 0)
	newConf.Watches = []map[string]interface{}{
		{
			"type": "key",
			"key":  "asdf",
			"args": []interface{}{"ls"},
		},
	}
	if err := a.reloadWatches(&newConf); err != nil {
		t.Fatalf("bad: %s", err)
	}

	// Should fail to reload with no http or https addrs
	newConf.HTTPSAddrs = make([]net.Addr, 0)
	newConf.Watches = []map[string]interface{}{
		{
			"type": "key",
			"key":  "asdf",
			"args": []interface{}{"ls"},
		},
	}
	if err := a.reloadWatches(&newConf); err == nil || !strings.Contains(err.Error(), "watch plans require an HTTP or HTTPS endpoint") {
		t.Fatalf("bad: %s", err)
	}
}

func TestAgent_reloadWatchesHTTPS(t *testing.T) {
	t.Parallel()
	a := TestAgent{Name: t.Name(), UseTLS: true}
	if err := a.Start(); err != nil {
		t.Fatal(err)
	}
	defer a.Shutdown()

	// Normal watch with http addr set, should succeed
	newConf := *a.config
	newConf.Watches = []map[string]interface{}{
		{
			"type": "key",
			"key":  "asdf",
			"args": []interface{}{"ls"},
		},
	}
	if err := a.reloadWatches(&newConf); err != nil {
		t.Fatalf("bad: %s", err)
	}
}

func TestAgent_loadTokens(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), `
		acl = {
			enabled = true
			tokens = {
				agent = "alfa"
				agent_master = "bravo",
				default = "charlie"
				replication = "delta"
			}
		}

	`)
	defer a.Shutdown()
	require := require.New(t)

	tokensFullPath := filepath.Join(a.config.DataDir, tokensPath)

	t.Run("original-configuration", func(t *testing.T) {
		require.Equal("alfa", a.tokens.AgentToken())
		require.Equal("bravo", a.tokens.AgentMasterToken())
		require.Equal("charlie", a.tokens.UserToken())
		require.Equal("delta", a.tokens.ReplicationToken())
	})

	t.Run("updated-configuration", func(t *testing.T) {
		cfg := &config.RuntimeConfig{
			ACLToken:            "echo",
			ACLAgentToken:       "foxtrot",
			ACLAgentMasterToken: "golf",
			ACLReplicationToken: "hotel",
		}
		// ensures no error for missing persisted tokens file
		require.NoError(a.loadTokens(cfg))
		require.Equal("echo", a.tokens.UserToken())
		require.Equal("foxtrot", a.tokens.AgentToken())
		require.Equal("golf", a.tokens.AgentMasterToken())
		require.Equal("hotel", a.tokens.ReplicationToken())
	})

	t.Run("persisted-tokens", func(t *testing.T) {
		cfg := &config.RuntimeConfig{
			ACLToken:            "echo",
			ACLAgentToken:       "foxtrot",
			ACLAgentMasterToken: "golf",
			ACLReplicationToken: "hotel",
		}

		tokens := `{
			"agent" : "india",
			"agent_master" : "juliett",
			"default": "kilo",
			"replication" : "lima"
		}`

		require.NoError(ioutil.WriteFile(tokensFullPath, []byte(tokens), 0600))
		require.NoError(a.loadTokens(cfg))

		// no updates since token persistence is not enabled
		require.Equal("echo", a.tokens.UserToken())
		require.Equal("foxtrot", a.tokens.AgentToken())
		require.Equal("golf", a.tokens.AgentMasterToken())
		require.Equal("hotel", a.tokens.ReplicationToken())

		a.config.ACLEnableTokenPersistence = true
		require.NoError(a.loadTokens(cfg))

		require.Equal("india", a.tokens.AgentToken())
		require.Equal("juliett", a.tokens.AgentMasterToken())
		require.Equal("kilo", a.tokens.UserToken())
		require.Equal("lima", a.tokens.ReplicationToken())
	})

	t.Run("persisted-tokens-override", func(t *testing.T) {
		tokens := `{
			"agent" : "mike",
			"agent_master" : "november",
			"default": "oscar",
			"replication" : "papa"
		}`

		cfg := &config.RuntimeConfig{
			ACLToken:            "quebec",
			ACLAgentToken:       "romeo",
			ACLAgentMasterToken: "sierra",
			ACLReplicationToken: "tango",
		}

		require.NoError(ioutil.WriteFile(tokensFullPath, []byte(tokens), 0600))
		require.NoError(a.loadTokens(cfg))

		require.Equal("mike", a.tokens.AgentToken())
		require.Equal("november", a.tokens.AgentMasterToken())
		require.Equal("oscar", a.tokens.UserToken())
		require.Equal("papa", a.tokens.ReplicationToken())
	})

	t.Run("partial-persisted", func(t *testing.T) {
		tokens := `{
			"agent" : "uniform",
			"agent_master" : "victor"
		}`

		cfg := &config.RuntimeConfig{
			ACLToken:            "whiskey",
			ACLAgentToken:       "xray",
			ACLAgentMasterToken: "yankee",
			ACLReplicationToken: "zulu",
		}

		require.NoError(ioutil.WriteFile(tokensFullPath, []byte(tokens), 0600))
		require.NoError(a.loadTokens(cfg))

		require.Equal("uniform", a.tokens.AgentToken())
		require.Equal("victor", a.tokens.AgentMasterToken())
		require.Equal("whiskey", a.tokens.UserToken())
		require.Equal("zulu", a.tokens.ReplicationToken())
	})

	t.Run("persistence-error-not-json", func(t *testing.T) {
		cfg := &config.RuntimeConfig{
			ACLToken:            "one",
			ACLAgentToken:       "two",
			ACLAgentMasterToken: "three",
			ACLReplicationToken: "four",
		}

		require.NoError(ioutil.WriteFile(tokensFullPath, []byte{0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08}, 0600))
		err := a.loadTokens(cfg)
		require.Error(err)

		require.Equal("one", a.tokens.UserToken())
		require.Equal("two", a.tokens.AgentToken())
		require.Equal("three", a.tokens.AgentMasterToken())
		require.Equal("four", a.tokens.ReplicationToken())
	})

	t.Run("persistence-error-wrong-top-level", func(t *testing.T) {
		cfg := &config.RuntimeConfig{
			ACLToken:            "alfa",
			ACLAgentToken:       "bravo",
			ACLAgentMasterToken: "charlie",
			ACLReplicationToken: "foxtrot",
		}

		require.NoError(ioutil.WriteFile(tokensFullPath, []byte("[1,2,3]"), 0600))
		err := a.loadTokens(cfg)
		require.Error(err)

		require.Equal("alfa", a.tokens.UserToken())
		require.Equal("bravo", a.tokens.AgentToken())
		require.Equal("charlie", a.tokens.AgentMasterToken())
		require.Equal("foxtrot", a.tokens.ReplicationToken())
	})
}

func TestAgent_ReloadConfigOutgoingRPCConfig(t *testing.T) {
	t.Parallel()
	dataDir := testutil.TempDir(t, "agent") // we manage the data dir
	defer os.RemoveAll(dataDir)
	hcl := `
		data_dir = "` + dataDir + `"
		verify_outgoing = true
		ca_file = "../test/ca/root.cer"
		cert_file = "../test/key/ourdomain.cer"
		key_file = "../test/key/ourdomain.key"
		verify_server_hostname = false
	`
	a := NewTestAgent(t, t.Name(), hcl)
	defer a.Shutdown()
	tlsConf := a.tlsConfigurator.OutgoingRPCConfig()
	require.True(t, tlsConf.InsecureSkipVerify)
	require.Len(t, tlsConf.ClientCAs.Subjects(), 1)
	require.Len(t, tlsConf.RootCAs.Subjects(), 1)

	hcl = `
		data_dir = "` + dataDir + `"
		verify_outgoing = true
		ca_path = "../test/ca_path"
		cert_file = "../test/key/ourdomain.cer"
		key_file = "../test/key/ourdomain.key"
		verify_server_hostname = true
	`
	c := TestConfig(testutil.Logger(t), config.Source{Name: t.Name(), Format: "hcl", Data: hcl})
	require.NoError(t, a.ReloadConfig(c))
	tlsConf = a.tlsConfigurator.OutgoingRPCConfig()
	require.False(t, tlsConf.InsecureSkipVerify)
	require.Len(t, tlsConf.RootCAs.Subjects(), 2)
	require.Len(t, tlsConf.ClientCAs.Subjects(), 2)
}

func TestAgent_ReloadConfigAndKeepChecksStatus(t *testing.T) {
	t.Parallel()
	dataDir := testutil.TempDir(t, "agent") // we manage the data dir
	defer os.RemoveAll(dataDir)
	waitDurationSeconds := 1
	hcl := `data_dir = "` + dataDir + `"
		enable_local_script_checks=true
		services=[{
		  name="webserver1",
		  check{name="check1",
		  args=["true"],
		  interval="` + strconv.Itoa(waitDurationSeconds) + `s"}}
		]`
	a := NewTestAgent(t, t.Name(), hcl)
	defer a.Shutdown()

	// Initially, state is critical during waitDurationSeconds seconds
	retry.Run(t, func(r *retry.R) {
		gotChecks := a.State.Checks(nil)
		require.Equal(r, 1, len(gotChecks), "Should have a check registered, but had %#v", gotChecks)
		for id, check := range gotChecks {
			require.Equal(r, "critical", check.Status, "check %q is wrong", id)
		}
	})
	c := TestConfig(testutil.Logger(t), config.Source{Name: t.Name(), Format: "hcl", Data: hcl})
	a.ReloadConfig(c)
	time.Sleep(time.Duration(waitDurationSeconds) * time.Second)
	// It should now be passing
	retry.Run(t, func(r *retry.R) {
		gotChecks := a.State.Checks(nil)
		for id, check := range gotChecks {
			require.Equal(r, "passing", check.Status, "check %q is wrong", id)
		}
	})

	require.NoError(t, a.ReloadConfig(c))
	// After reload, should be passing directly (no critical state)
	for id, check := range a.State.Checks(nil) {
		require.Equal(t, "passing", check.Status, "check %q is wrong", id)
	}
	// Ensure to take reload into account event with async stuff
	time.Sleep(time.Duration(100) * time.Millisecond)
	// Of course, after a sleep, should be Ok too
	for id, check := range a.State.Checks(nil) {
		require.Equal(t, "passing", check.Status, "check %q is wrong", id)
	}
}

func TestAgent_ReloadConfigIncomingRPCConfig(t *testing.T) {
	t.Parallel()
	dataDir := testutil.TempDir(t, "agent") // we manage the data dir
	defer os.RemoveAll(dataDir)
	hcl := `
		data_dir = "` + dataDir + `"
		verify_outgoing = true
		ca_file = "../test/ca/root.cer"
		cert_file = "../test/key/ourdomain.cer"
		key_file = "../test/key/ourdomain.key"
		verify_server_hostname = false
	`
	a := NewTestAgent(t, t.Name(), hcl)
	defer a.Shutdown()
	tlsConf := a.tlsConfigurator.IncomingRPCConfig()
	require.NotNil(t, tlsConf.GetConfigForClient)
	tlsConf, err := tlsConf.GetConfigForClient(nil)
	require.NoError(t, err)
	require.NotNil(t, tlsConf)
	require.True(t, tlsConf.InsecureSkipVerify)
	require.Len(t, tlsConf.ClientCAs.Subjects(), 1)
	require.Len(t, tlsConf.RootCAs.Subjects(), 1)

	hcl = `
		data_dir = "` + dataDir + `"
		verify_outgoing = true
		ca_path = "../test/ca_path"
		cert_file = "../test/key/ourdomain.cer"
		key_file = "../test/key/ourdomain.key"
		verify_server_hostname = true
	`
	c := TestConfig(testutil.Logger(t), config.Source{Name: t.Name(), Format: "hcl", Data: hcl})
	require.NoError(t, a.ReloadConfig(c))
	tlsConf, err = tlsConf.GetConfigForClient(nil)
	require.NoError(t, err)
	require.False(t, tlsConf.InsecureSkipVerify)
	require.Len(t, tlsConf.ClientCAs.Subjects(), 2)
	require.Len(t, tlsConf.RootCAs.Subjects(), 2)
}

func TestAgent_ReloadConfigTLSConfigFailure(t *testing.T) {
	t.Parallel()
	dataDir := testutil.TempDir(t, "agent") // we manage the data dir
	defer os.RemoveAll(dataDir)
	hcl := `
		data_dir = "` + dataDir + `"
		verify_outgoing = true
		ca_file = "../test/ca/root.cer"
		cert_file = "../test/key/ourdomain.cer"
		key_file = "../test/key/ourdomain.key"
		verify_server_hostname = false
	`
	a := NewTestAgent(t, t.Name(), hcl)
	defer a.Shutdown()
	tlsConf := a.tlsConfigurator.IncomingRPCConfig()

	hcl = `
		data_dir = "` + dataDir + `"
		verify_incoming = true
	`
	c := TestConfig(testutil.Logger(t), config.Source{Name: t.Name(), Format: "hcl", Data: hcl})
	require.Error(t, a.ReloadConfig(c))
	tlsConf, err := tlsConf.GetConfigForClient(nil)
	require.NoError(t, err)
	require.Equal(t, tls.NoClientCert, tlsConf.ClientAuth)
	require.Len(t, tlsConf.ClientCAs.Subjects(), 1)
	require.Len(t, tlsConf.RootCAs.Subjects(), 1)
}

func TestAgent_consulConfig_AutoEncryptAllowTLS(t *testing.T) {
	t.Parallel()
	dataDir := testutil.TempDir(t, "agent") // we manage the data dir
	defer os.RemoveAll(dataDir)
	hcl := `
		data_dir = "` + dataDir + `"
		verify_incoming = true
		ca_file = "../test/ca/root.cer"
		cert_file = "../test/key/ourdomain.cer"
		key_file = "../test/key/ourdomain.key"
		auto_encrypt { allow_tls = true }
	`
	a := NewTestAgent(t, t.Name(), hcl)
	defer a.Shutdown()
	require.True(t, a.consulConfig().AutoEncryptAllowTLS)
}

func TestAgent_consulConfig_RaftTrailingLogs(t *testing.T) {
	t.Parallel()
	hcl := `
		raft_trailing_logs = 812345
	`
	a := NewTestAgent(t, t.Name(), hcl)
	defer a.Shutdown()
	require.Equal(t, uint64(812345), a.consulConfig().RaftConfig.TrailingLogs)
}

func TestAgent_grpcInjectAddr(t *testing.T) {
	tt := []struct {
		name string
		grpc string
		ip   string
		port int
		want string
	}{
		{
			name: "localhost web svc",
			grpc: "localhost:8080/web",
			ip:   "192.168.0.0",
			port: 9090,
			want: "192.168.0.0:9090/web",
		},
		{
			name: "localhost no svc",
			grpc: "localhost:8080",
			ip:   "192.168.0.0",
			port: 9090,
			want: "192.168.0.0:9090",
		},
		{
			name: "ipv4 web svc",
			grpc: "127.0.0.1:8080/web",
			ip:   "192.168.0.0",
			port: 9090,
			want: "192.168.0.0:9090/web",
		},
		{
			name: "ipv4 no svc",
			grpc: "127.0.0.1:8080",
			ip:   "192.168.0.0",
			port: 9090,
			want: "192.168.0.0:9090",
		},
		{
			name: "ipv6 no svc",
			grpc: "2001:db8:1f70::999:de8:7648:6e8:5000",
			ip:   "192.168.0.0",
			port: 9090,
			want: "192.168.0.0:9090",
		},
		{
			name: "ipv6 web svc",
			grpc: "2001:db8:1f70::999:de8:7648:6e8:5000/web",
			ip:   "192.168.0.0",
			port: 9090,
			want: "192.168.0.0:9090/web",
		},
		{
			name: "zone ipv6 web svc",
			grpc: "::FFFF:C0A8:1%1:5000/web",
			ip:   "192.168.0.0",
			port: 9090,
			want: "192.168.0.0:9090/web",
		},
		{
			name: "ipv6 literal web svc",
			grpc: "::FFFF:192.168.0.1:5000/web",
			ip:   "192.168.0.0",
			port: 9090,
			want: "192.168.0.0:9090/web",
		},
		{
			name: "ipv6 injected into ipv6 url",
			grpc: "2001:db8:1f70::999:de8:7648:6e8:5000",
			ip:   "::FFFF:C0A8:1",
			port: 9090,
			want: "::FFFF:C0A8:1:9090",
		},
		{
			name: "ipv6 injected into ipv6 url with svc",
			grpc: "2001:db8:1f70::999:de8:7648:6e8:5000/web",
			ip:   "::FFFF:C0A8:1",
			port: 9090,
			want: "::FFFF:C0A8:1:9090/web",
		},
		{
			name: "ipv6 injected into ipv6 url with special",
			grpc: "2001:db8:1f70::999:de8:7648:6e8:5000/service-$name:with@special:Chars",
			ip:   "::FFFF:C0A8:1",
			port: 9090,
			want: "::FFFF:C0A8:1:9090/service-$name:with@special:Chars",
		},
	}
	for _, tt := range tt {
		t.Run(tt.name, func(t *testing.T) {
			got := grpcInjectAddr(tt.grpc, tt.ip, tt.port)
			if got != tt.want {
				t.Errorf("httpInjectAddr() got = %v, want %v", got, tt.want)
			}
		})
	}
}

func TestAgent_httpInjectAddr(t *testing.T) {
	tt := []struct {
		name string
		url  string
		ip   string
		port int
		want string
	}{
		{
			name: "localhost health",
			url:  "http://localhost:8080/health",
			ip:   "192.168.0.0",
			port: 9090,
			want: "http://192.168.0.0:9090/health",
		},
		{
			name: "https localhost health",
			url:  "https://localhost:8080/health",
			ip:   "192.168.0.0",
			port: 9090,
			want: "https://192.168.0.0:9090/health",
		},
		{
			name: "https ipv4 health",
			url:  "https://127.0.0.1:8080/health",
			ip:   "192.168.0.0",
			port: 9090,
			want: "https://192.168.0.0:9090/health",
		},
		{
			name: "https ipv4 without path",
			url:  "https://127.0.0.1:8080",
			ip:   "192.168.0.0",
			port: 9090,
			want: "https://192.168.0.0:9090",
		},
		{
			name: "https ipv6 health",
			url:  "https://[2001:db8:1f70::999:de8:7648:6e8]:5000/health",
			ip:   "192.168.0.0",
			port: 9090,
			want: "https://192.168.0.0:9090/health",
		},
		{
			name: "https ipv6 with zone",
			url:  "https://[::FFFF:C0A8:1%1]:5000/health",
			ip:   "192.168.0.0",
			port: 9090,
			want: "https://192.168.0.0:9090/health",
		},
		{
			name: "https ipv6 literal",
			url:  "https://[::FFFF:192.168.0.1]:5000/health",
			ip:   "192.168.0.0",
			port: 9090,
			want: "https://192.168.0.0:9090/health",
		},
		{
			name: "https ipv6 without path",
			url:  "https://[2001:db8:1f70::999:de8:7648:6e8]:5000",
			ip:   "192.168.0.0",
			port: 9090,
			want: "https://192.168.0.0:9090",
		},
		{
			name: "ipv6 injected into ipv6 url",
			url:  "https://[2001:db8:1f70::999:de8:7648:6e8]:5000",
			ip:   "::FFFF:C0A8:1",
			port: 9090,
			want: "https://[::FFFF:C0A8:1]:9090",
		},
		{
			name: "ipv6 with brackets injected into ipv6 url",
			url:  "https://[2001:db8:1f70::999:de8:7648:6e8]:5000",
			ip:   "[::FFFF:C0A8:1]",
			port: 9090,
			want: "https://[::FFFF:C0A8:1]:9090",
		},
		{
			name: "short domain health",
			url:  "http://i.co:8080/health",
			ip:   "192.168.0.0",
			port: 9090,
			want: "http://192.168.0.0:9090/health",
		},
		{
			name: "nested url in query",
			url:  "http://my.corp.com:8080/health?from=http://google.com:8080",
			ip:   "192.168.0.0",
			port: 9090,
			want: "http://192.168.0.0:9090/health?from=http://google.com:8080",
		},
	}
	for _, tt := range tt {
		t.Run(tt.name, func(t *testing.T) {
			got := httpInjectAddr(tt.url, tt.ip, tt.port)
			if got != tt.want {
				t.Errorf("httpInjectAddr() got = %v, want %v", got, tt.want)
			}
		})
	}
}

func TestDefaultIfEmpty(t *testing.T) {
	require.Equal(t, "", defaultIfEmpty("", ""))
	require.Equal(t, "foo", defaultIfEmpty("", "foo"))
	require.Equal(t, "bar", defaultIfEmpty("bar", "foo"))
	require.Equal(t, "bar", defaultIfEmpty("bar", ""))
}

func TestConfigSourceFromName(t *testing.T) {
	cases := []struct {
		in     string
		expect configSource
		bad    bool
	}{
		{in: "local", expect: ConfigSourceLocal},
		{in: "remote", expect: ConfigSourceRemote},
		{in: "", expect: ConfigSourceLocal},
		{in: "LOCAL", bad: true},
		{in: "REMOTE", bad: true},
		{in: "garbage", bad: true},
		{in: " ", bad: true},
	}

	for _, tc := range cases {
		tc := tc
		t.Run(tc.in, func(t *testing.T) {
			got, ok := ConfigSourceFromName(tc.in)
			if tc.bad {
				require.False(t, ok)
				require.Empty(t, got)
			} else {
				require.True(t, ok)
				require.Equal(t, tc.expect, got)
			}
		})
	}
}

func TestAgent_RerouteExistingHTTPChecks(t *testing.T) {
	t.Parallel()

	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	// Register a service without a ProxyAddr
	svc := &structs.NodeService{
		ID:      "web",
		Service: "web",
		Address: "localhost",
		Port:    8080,
	}
	chks := []*structs.CheckType{
		{
			CheckID:       "http",
			HTTP:          "http://localhost:8080/mypath?query",
			Interval:      20 * time.Millisecond,
			TLSSkipVerify: true,
		},
		{
			CheckID:       "grpc",
			GRPC:          "localhost:8080/myservice",
			Interval:      20 * time.Millisecond,
			TLSSkipVerify: true,
		},
	}
	if err := a.AddService(svc, chks, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("failed to add svc: %v", err)
	}

	// Register a proxy and expose HTTP checks
	// This should trigger setting ProxyHTTP and ProxyGRPC in the checks
	proxy := &structs.NodeService{
		Kind:    "connect-proxy",
		ID:      "web-proxy",
		Service: "web-proxy",
		Address: "localhost",
		Port:    21500,
		Proxy: structs.ConnectProxyConfig{
			DestinationServiceName: "web",
			DestinationServiceID:   "web",
			LocalServiceAddress:    "localhost",
			LocalServicePort:       8080,
			MeshGateway:            structs.MeshGatewayConfig{},
			Expose: structs.ExposeConfig{
				Checks: true,
			},
		},
	}
	if err := a.AddService(proxy, nil, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("failed to add svc: %v", err)
	}

	retry.Run(t, func(r *retry.R) {
		chks := a.ServiceHTTPBasedChecks(structs.NewServiceID("web", nil))

		got := chks[0].ProxyHTTP
		if got == "" {
			r.Fatal("proxyHTTP addr not set in check")
		}

		want := "http://localhost:21500/mypath?query"
		if got != want {
			r.Fatalf("unexpected proxy addr in check, want: %s, got: %s", want, got)
		}
	})

	retry.Run(t, func(r *retry.R) {
		chks := a.ServiceHTTPBasedChecks(structs.NewServiceID("web", nil))

		// Will be at a later index than HTTP check because of the fetching order in ServiceHTTPBasedChecks
		got := chks[1].ProxyGRPC
		if got == "" {
			r.Fatal("ProxyGRPC addr not set in check")
		}

		// Node that this relies on listener ports auto-incrementing in a.listenerPortLocked
		want := "localhost:21501/myservice"
		if got != want {
			r.Fatalf("unexpected proxy addr in check, want: %s, got: %s", want, got)
		}
	})

	// Re-register a proxy and disable exposing HTTP checks
	// This should trigger resetting ProxyHTTP and ProxyGRPC to empty strings
	proxy = &structs.NodeService{
		Kind:    "connect-proxy",
		ID:      "web-proxy",
		Service: "web-proxy",
		Address: "localhost",
		Port:    21500,
		Proxy: structs.ConnectProxyConfig{
			DestinationServiceName: "web",
			DestinationServiceID:   "web",
			LocalServiceAddress:    "localhost",
			LocalServicePort:       8080,
			MeshGateway:            structs.MeshGatewayConfig{},
			Expose: structs.ExposeConfig{
				Checks: false,
			},
		},
	}
	if err := a.AddService(proxy, nil, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("failed to add svc: %v", err)
	}

	retry.Run(t, func(r *retry.R) {
		chks := a.ServiceHTTPBasedChecks(structs.NewServiceID("web", nil))

		got := chks[0].ProxyHTTP
		if got != "" {
			r.Fatal("ProxyHTTP addr was not reset")
		}
	})

	retry.Run(t, func(r *retry.R) {
		chks := a.ServiceHTTPBasedChecks(structs.NewServiceID("web", nil))

		// Will be at a later index than HTTP check because of the fetching order in ServiceHTTPBasedChecks
		got := chks[1].ProxyGRPC
		if got != "" {
			r.Fatal("ProxyGRPC addr was not reset")
		}
	})
}

func TestAgent_RerouteNewHTTPChecks(t *testing.T) {
	t.Parallel()

	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	// Register a service without a ProxyAddr
	svc := &structs.NodeService{
		ID:      "web",
		Service: "web",
		Address: "localhost",
		Port:    8080,
	}
	if err := a.AddService(svc, nil, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("failed to add svc: %v", err)
	}

	// Register a proxy and expose HTTP checks
	proxy := &structs.NodeService{
		Kind:    "connect-proxy",
		ID:      "web-proxy",
		Service: "web-proxy",
		Address: "localhost",
		Port:    21500,
		Proxy: structs.ConnectProxyConfig{
			DestinationServiceName: "web",
			DestinationServiceID:   "web",
			LocalServiceAddress:    "localhost",
			LocalServicePort:       8080,
			MeshGateway:            structs.MeshGatewayConfig{},
			Expose: structs.ExposeConfig{
				Checks: true,
			},
		},
	}
	if err := a.AddService(proxy, nil, false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("failed to add svc: %v", err)
	}

	checks := []*structs.HealthCheck{
		{
			CheckID:   "http",
			Name:      "http",
			ServiceID: "web",
			Status:    api.HealthCritical,
		},
		{
			CheckID:   "grpc",
			Name:      "grpc",
			ServiceID: "web",
			Status:    api.HealthCritical,
		},
	}
	chkTypes := []*structs.CheckType{
		{
			CheckID:       "http",
			HTTP:          "http://localhost:8080/mypath?query",
			Interval:      20 * time.Millisecond,
			TLSSkipVerify: true,
		},
		{
			CheckID:       "grpc",
			GRPC:          "localhost:8080/myservice",
			Interval:      20 * time.Millisecond,
			TLSSkipVerify: true,
		},
	}

	// ProxyGRPC and ProxyHTTP should be set when creating check
	// since proxy.expose.checks is enabled on the proxy
	if err := a.AddCheck(checks[0], chkTypes[0], false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("failed to add check: %v", err)
	}
	if err := a.AddCheck(checks[1], chkTypes[1], false, "", ConfigSourceLocal); err != nil {
		t.Fatalf("failed to add check: %v", err)
	}

	retry.Run(t, func(r *retry.R) {
		chks := a.ServiceHTTPBasedChecks(structs.NewServiceID("web", nil))

		got := chks[0].ProxyHTTP
		if got == "" {
			r.Fatal("ProxyHTTP addr not set in check")
		}

		want := "http://localhost:21500/mypath?query"
		if got != want {
			r.Fatalf("unexpected proxy addr in http check, want: %s, got: %s", want, got)
		}
	})

	retry.Run(t, func(r *retry.R) {
		chks := a.ServiceHTTPBasedChecks(structs.NewServiceID("web", nil))

		// Will be at a later index than HTTP check because of the fetching order in ServiceHTTPBasedChecks
		got := chks[1].ProxyGRPC
		if got == "" {
			r.Fatal("ProxyGRPC addr not set in check")
		}

		want := "localhost:21501/myservice"
		if got != want {
			r.Fatalf("unexpected proxy addr in grpc check, want: %s, got: %s", want, got)
		}
	})
}

func TestAgentCache_serviceInConfigFile_initialFetchErrors_Issue6521(t *testing.T) {
	t.Parallel()

	// Ensure that initial failures to fetch the discovery chain via the agent
	// cache using the notify API for a service with no config entries
	// correctly recovers when those RPCs resume working. The key here is that
	// the lack of config entries guarantees that the RPC will come back with a
	// synthetic index of 1.
	//
	// The bug in the Cache.notifyBlockingQuery used to incorrectly "fix" the
	// index for the next query from 0 to 1 for all queries, when it should
	// have not done so for queries that errored.

	a1 := NewTestAgent(t, t.Name()+"-a1", "")
	defer a1.Shutdown()
	testrpc.WaitForLeader(t, a1.RPC, "dc1")

	a2 := NewTestAgent(t, t.Name()+"-a2", `
		server = false
		bootstrap = false
services {
  name = "echo-client"
  port = 8080
  connect {
    sidecar_service {
      proxy {
        upstreams {
          destination_name = "echo"
          local_bind_port  = 9191
        }
      }
    }
  }
}

services {
  name = "echo"
  port = 9090
  connect {
    sidecar_service {}
  }
}
	`)
	defer a2.Shutdown()

	// Starting a client agent disconnected from a server with services.
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	ch := make(chan cache.UpdateEvent, 1)
	require.NoError(t, a2.cache.Notify(ctx, cachetype.CompiledDiscoveryChainName, &structs.DiscoveryChainRequest{
		Datacenter:           "dc1",
		Name:                 "echo",
		EvaluateInDatacenter: "dc1",
		EvaluateInNamespace:  "default",
	}, "foo", ch))

	{ // The first event is an error because we are not joined yet.
		evt := <-ch
		require.Equal(t, "foo", evt.CorrelationID)
		require.Nil(t, evt.Result)
		require.Error(t, evt.Err)
		require.Equal(t, evt.Err, structs.ErrNoServers)
	}

	t.Logf("joining client to server")

	// Now connect to server
	_, err := a1.JoinLAN([]string{
		fmt.Sprintf("127.0.0.1:%d", a2.Config.SerfPortLAN),
	})
	require.NoError(t, err)

	t.Logf("joined client to server")

	deadlineCh := time.After(10 * time.Second)
	start := time.Now()
LOOP:
	for {
		select {
		case evt := <-ch:
			// We may receive several notifications of an error until we get the
			// first successful reply.
			require.Equal(t, "foo", evt.CorrelationID)
			if evt.Err != nil {
				break LOOP
			}
			require.NoError(t, evt.Err)
			require.NotNil(t, evt.Result)
			t.Logf("took %s to get first success", time.Since(start))
		case <-deadlineCh:
			t.Fatal("did not get notified successfully")
		}
	}
}

// This is a mirror of a similar test in agent/consul/server_test.go
func TestAgent_JoinWAN_viaMeshGateway(t *testing.T) {
	t.Parallel()

	gwPort := freeport.MustTake(1)
	defer freeport.Return(gwPort)
	gwAddr := ipaddr.FormatAddressPort("127.0.0.1", gwPort[0])

	// Due to some ordering, we'll have to manually configure these ports in
	// advance.
	secondaryRPCPorts := freeport.MustTake(2)
	defer freeport.Return(secondaryRPCPorts)

	a1 := NewTestAgent(t, t.Name()+"-bob", `
		domain = "consul"
		node_name = "bob"
		datacenter = "dc1"
		primary_datacenter = "dc1"
		# tls
		ca_file = "../test/hostname/CertAuth.crt"
		cert_file = "../test/hostname/Bob.crt"
		key_file = "../test/hostname/Bob.key"
		verify_incoming               = true
		verify_outgoing               = true
		verify_server_hostname        = true
		# wanfed
		connect {
			enabled = true
			enable_mesh_gateway_wan_federation = true
		}
	`)
	defer a1.Shutdown()
	testrpc.WaitForTestAgent(t, a1.RPC, "dc1")

	// We'll use the same gateway for all datacenters since it doesn't care.
	var (
		rpcAddr1 = ipaddr.FormatAddressPort("127.0.0.1", a1.Config.ServerPort)
		rpcAddr2 = ipaddr.FormatAddressPort("127.0.0.1", secondaryRPCPorts[0])
		rpcAddr3 = ipaddr.FormatAddressPort("127.0.0.1", secondaryRPCPorts[1])
	)
	var p tcpproxy.Proxy
	p.AddSNIRoute(gwAddr, "bob.server.dc1.consul", tcpproxy.To(rpcAddr1))
	p.AddSNIRoute(gwAddr, "server.dc1.consul", tcpproxy.To(rpcAddr1))
	p.AddSNIRoute(gwAddr, "betty.server.dc2.consul", tcpproxy.To(rpcAddr2))
	p.AddSNIRoute(gwAddr, "server.dc2.consul", tcpproxy.To(rpcAddr2))
	p.AddSNIRoute(gwAddr, "bonnie.server.dc3.consul", tcpproxy.To(rpcAddr3))
	p.AddSNIRoute(gwAddr, "server.dc3.consul", tcpproxy.To(rpcAddr3))
	p.AddStopACMESearch(gwAddr)
	require.NoError(t, p.Start())
	defer func() {
		p.Close()
		p.Wait()
	}()

	t.Logf("routing %s => %s", "{bob.,}server.dc1.consul", rpcAddr1)
	t.Logf("routing %s => %s", "{betty.,}server.dc2.consul", rpcAddr2)
	t.Logf("routing %s => %s", "{bonnie.,}server.dc3.consul", rpcAddr3)

	// Register this into the agent in dc1.
	{
		args := &structs.ServiceDefinition{
			Kind: structs.ServiceKindMeshGateway,
			ID:   "mesh-gateway",
			Name: "mesh-gateway",
			Meta: map[string]string{structs.MetaWANFederationKey: "1"},
			Port: gwPort[0],
		}
		req, err := http.NewRequest("PUT", "/v1/agent/service/register", jsonReader(args))
		require.NoError(t, err)

		obj, err := a1.srv.AgentRegisterService(nil, req)
		require.NoError(t, err)
		require.Nil(t, obj)
	}

	waitForFederationState := func(t *testing.T, a *TestAgent, dc string) {
		retry.Run(t, func(r *retry.R) {
			req, err := http.NewRequest("GET", "/v1/internal/federation-state/"+dc, nil)
			require.NoError(r, err)

			resp := httptest.NewRecorder()
			obj, err := a.srv.FederationStateGet(resp, req)
			require.NoError(r, err)
			require.NotNil(r, obj)

			out, ok := obj.(structs.FederationStateResponse)
			require.True(r, ok)
			require.NotNil(r, out.State)
			require.Len(r, out.State.MeshGateways, 1)
		})
	}

	// Wait until at least catalog AE and federation state AE fire.
	waitForFederationState(t, a1, "dc1")
	retry.Run(t, func(r *retry.R) {
		require.NotEmpty(r, a1.PickRandomMeshGatewaySuitableForDialing("dc1"))
	})

	a2 := NewTestAgent(t, t.Name()+"-betty", `
		domain = "consul"
		node_name = "betty"
		datacenter = "dc2"
		primary_datacenter = "dc1"
		# tls
		ca_file = "../test/hostname/CertAuth.crt"
		cert_file = "../test/hostname/Betty.crt"
		key_file = "../test/hostname/Betty.key"
		verify_incoming               = true
		verify_outgoing               = true
		verify_server_hostname        = true
		ports {
			server = `+strconv.Itoa(secondaryRPCPorts[0])+`
		}
		# wanfed
		primary_gateways = ["`+gwAddr+`"]
		connect {
			enabled = true
			enable_mesh_gateway_wan_federation = true
		}
	`)
	defer a2.Shutdown()
	testrpc.WaitForTestAgent(t, a2.RPC, "dc2")

	a3 := NewTestAgent(t, t.Name()+"-bonnie", `
		domain = "consul"
		node_name = "bonnie"
		datacenter = "dc3"
		primary_datacenter = "dc1"
		# tls
		ca_file = "../test/hostname/CertAuth.crt"
		cert_file = "../test/hostname/Bonnie.crt"
		key_file = "../test/hostname/Bonnie.key"
		verify_incoming               = true
		verify_outgoing               = true
		verify_server_hostname        = true
		ports {
			server = `+strconv.Itoa(secondaryRPCPorts[1])+`
		}
		# wanfed
		primary_gateways = ["`+gwAddr+`"]
		connect {
			enabled = true
			enable_mesh_gateway_wan_federation = true
		}
	`)
	defer a3.Shutdown()
	testrpc.WaitForTestAgent(t, a3.RPC, "dc3")

	// The primary_gateways config setting should cause automatic mesh join.
	// Assert that the secondaries have joined the primary.
	findPrimary := func(r *retry.R, a *TestAgent) *serf.Member {
		var primary *serf.Member
		for _, m := range a.WANMembers() {
			if m.Tags["dc"] == "dc1" {
				require.Nil(r, primary, "already found one node in dc1")
				primary = &m
			}
		}
		require.NotNil(r, primary)
		return primary
	}
	retry.Run(t, func(r *retry.R) {
		p2, p3 := findPrimary(r, a2), findPrimary(r, a3)
		require.Equal(r, "bob.dc1", p2.Name)
		require.Equal(r, "bob.dc1", p3.Name)
	})

	testrpc.WaitForLeader(t, a2.RPC, "dc2")
	testrpc.WaitForLeader(t, a3.RPC, "dc3")

	// Now we can register this into the catalog in dc2 and dc3.
	{
		args := &structs.ServiceDefinition{
			Kind: structs.ServiceKindMeshGateway,
			ID:   "mesh-gateway",
			Name: "mesh-gateway",
			Meta: map[string]string{structs.MetaWANFederationKey: "1"},
			Port: gwPort[0],
		}
		req, err := http.NewRequest("PUT", "/v1/agent/service/register", jsonReader(args))
		require.NoError(t, err)

		obj, err := a2.srv.AgentRegisterService(nil, req)
		require.NoError(t, err)
		require.Nil(t, obj)
	}
	{
		args := &structs.ServiceDefinition{
			Kind: structs.ServiceKindMeshGateway,
			ID:   "mesh-gateway",
			Name: "mesh-gateway",
			Meta: map[string]string{structs.MetaWANFederationKey: "1"},
			Port: gwPort[0],
		}
		req, err := http.NewRequest("PUT", "/v1/agent/service/register", jsonReader(args))
		require.NoError(t, err)

		obj, err := a3.srv.AgentRegisterService(nil, req)
		require.NoError(t, err)
		require.Nil(t, obj)
	}

	// Wait until federation state replication functions
	waitForFederationState(t, a1, "dc1")
	waitForFederationState(t, a1, "dc2")
	waitForFederationState(t, a1, "dc3")

	waitForFederationState(t, a2, "dc1")
	waitForFederationState(t, a2, "dc2")
	waitForFederationState(t, a2, "dc3")

	waitForFederationState(t, a3, "dc1")
	waitForFederationState(t, a3, "dc2")
	waitForFederationState(t, a3, "dc3")

	retry.Run(t, func(r *retry.R) {
		require.NotEmpty(r, a1.PickRandomMeshGatewaySuitableForDialing("dc1"))
		require.NotEmpty(r, a1.PickRandomMeshGatewaySuitableForDialing("dc2"))
		require.NotEmpty(r, a1.PickRandomMeshGatewaySuitableForDialing("dc3"))

		require.NotEmpty(r, a2.PickRandomMeshGatewaySuitableForDialing("dc1"))
		require.NotEmpty(r, a2.PickRandomMeshGatewaySuitableForDialing("dc2"))
		require.NotEmpty(r, a2.PickRandomMeshGatewaySuitableForDialing("dc3"))

		require.NotEmpty(r, a3.PickRandomMeshGatewaySuitableForDialing("dc1"))
		require.NotEmpty(r, a3.PickRandomMeshGatewaySuitableForDialing("dc2"))
		require.NotEmpty(r, a3.PickRandomMeshGatewaySuitableForDialing("dc3"))
	})

	retry.Run(t, func(r *retry.R) {
		if got, want := len(a1.WANMembers()), 3; got != want {
			r.Fatalf("got %d WAN members want at least %d", got, want)
		}
		if got, want := len(a2.WANMembers()), 3; got != want {
			r.Fatalf("got %d WAN members want at least %d", got, want)
		}
		if got, want := len(a3.WANMembers()), 3; got != want {
			r.Fatalf("got %d WAN members want at least %d", got, want)
		}
	})

	// Ensure we can do some trivial RPC in all directions.
	agents := map[string]*TestAgent{"dc1": a1, "dc2": a2, "dc3": a3}
	names := map[string]string{"dc1": "bob", "dc2": "betty", "dc3": "bonnie"}
	for _, srcDC := range []string{"dc1", "dc2", "dc3"} {
		a := agents[srcDC]
		for _, dstDC := range []string{"dc1", "dc2", "dc3"} {
			if srcDC == dstDC {
				continue
			}
			t.Run(srcDC+" to "+dstDC, func(t *testing.T) {
				req, err := http.NewRequest("GET", "/v1/catalog/nodes?dc="+dstDC, nil)
				require.NoError(t, err)

				resp := httptest.NewRecorder()
				obj, err := a.srv.CatalogNodes(resp, req)
				require.NoError(t, err)
				require.NotNil(t, obj)

				nodes, ok := obj.(structs.Nodes)
				require.True(t, ok)
				require.Len(t, nodes, 1)
				node := nodes[0]
				require.Equal(t, dstDC, node.Datacenter)
				require.Equal(t, names[dstDC], node.Node)
			})
		}
	}
}