mirror of https://github.com/status-im/consul.git
608 lines
16 KiB
Go
608 lines
16 KiB
Go
package agent
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import (
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"bytes"
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"context"
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/x509"
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"fmt"
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"io"
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"math/rand"
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"net"
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"net/http/httptest"
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"path/filepath"
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"strconv"
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"testing"
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"text/template"
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"time"
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metrics "github.com/armon/go-metrics"
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"github.com/hashicorp/consul/sdk/testutil"
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"github.com/hashicorp/errwrap"
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"github.com/hashicorp/go-hclog"
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uuid "github.com/hashicorp/go-uuid"
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"github.com/stretchr/testify/require"
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"github.com/hashicorp/consul/acl"
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"github.com/hashicorp/consul/agent/config"
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"github.com/hashicorp/consul/agent/connect"
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"github.com/hashicorp/consul/agent/consul"
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"github.com/hashicorp/consul/agent/structs"
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"github.com/hashicorp/consul/api"
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"github.com/hashicorp/consul/sdk/freeport"
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"github.com/hashicorp/consul/sdk/testutil/retry"
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"github.com/hashicorp/consul/tlsutil"
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)
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func init() {
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rand.Seed(time.Now().UnixNano()) // seed random number generator
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}
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// TestAgent encapsulates an Agent with a default configuration and
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// startup procedure suitable for testing. It panics if there are errors
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// during creation or startup instead of returning errors. It manages a
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// temporary data directory which is removed after shutdown.
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type TestAgent struct {
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// Name is an optional name of the agent.
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Name string
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HCL string
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// Config is the agent configuration. If Config is nil then
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// TestConfig() is used. If Config.DataDir is set then it is
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// the callers responsibility to clean up the data directory.
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// Otherwise, a temporary data directory is created and removed
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// when Shutdown() is called.
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Config *config.RuntimeConfig
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// LogOutput is the sink for the logs. If nil, logs are written
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// to os.Stderr.
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LogOutput io.Writer
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// DataDir may be set to a directory which exists. If is it not set,
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// TestAgent.Start will create one and set DataDir to the directory path.
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// In all cases the agent will be configured to use this path as the data directory,
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// and the directory will be removed once the test ends.
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DataDir string
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// UseTLS, if true, will disable the HTTP port and enable the HTTPS
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// one.
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UseTLS bool
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// dns is a reference to the first started DNS endpoint.
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// It is valid after Start().
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dns *DNSServer
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// srv is an HTTPServer that may be used to test http endpoints.
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srv *HTTPServer
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// overrides is an hcl config source to use to override otherwise
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// non-user settable configurations
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Overrides string
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// Agent is the embedded consul agent.
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// It is valid after Start().
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*Agent
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}
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// NewTestAgent returns a started agent with the given configuration. It fails
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// the test if the Agent could not be started.
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// The caller is responsible for calling Shutdown() to stop the agent and remove
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// temporary directories.
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func NewTestAgent(t *testing.T, hcl string) *TestAgent {
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return StartTestAgent(t, TestAgent{HCL: hcl})
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}
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// StartTestAgent and wait for it to become available. If the agent fails to
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// start the test will be marked failed and execution will stop.
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//
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// The caller is responsible for calling Shutdown() to stop the agent and remove
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// temporary directories.
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func StartTestAgent(t *testing.T, a TestAgent) *TestAgent {
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t.Helper()
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retry.RunWith(retry.ThreeTimes(), t, func(r *retry.R) {
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if err := a.Start(t); err != nil {
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r.Fatal(err)
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}
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})
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return &a
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}
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func TestConfigHCL(nodeID string) string {
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return fmt.Sprintf(`
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bind_addr = "127.0.0.1"
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advertise_addr = "127.0.0.1"
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datacenter = "dc1"
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bootstrap = true
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server = true
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node_id = "%[1]s"
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node_name = "Node-%[1]s"
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connect {
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enabled = true
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ca_config {
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cluster_id = "%[2]s"
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}
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}
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performance {
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raft_multiplier = 1
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}`, nodeID, connect.TestClusterID,
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)
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}
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// Start starts a test agent. It returns an error if the agent could not be started.
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// If no error is returned, the caller must call Shutdown() when finished.
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func (a *TestAgent) Start(t *testing.T) (err error) {
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t.Helper()
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if a.Agent != nil {
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return fmt.Errorf("TestAgent already started")
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}
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name := a.Name
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if name == "" {
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name = "TestAgent"
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}
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if a.DataDir == "" {
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dirname := name + "-agent"
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a.DataDir = testutil.TempDir(t, dirname)
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}
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// Convert windows style path to posix style path to avoid illegal char escape
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// error when hcl parsing.
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d := filepath.ToSlash(a.DataDir)
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hclDataDir := fmt.Sprintf(`data_dir = "%s"`, d)
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logOutput := a.LogOutput
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if logOutput == nil {
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logOutput = testutil.NewLogBuffer(t)
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}
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logger := hclog.NewInterceptLogger(&hclog.LoggerOptions{
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Level: hclog.Debug,
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Output: logOutput,
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TimeFormat: "04:05.000",
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Name: name,
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})
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portsConfig, returnPortsFn := randomPortsSource(a.UseTLS)
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t.Cleanup(returnPortsFn)
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// Create NodeID outside the closure, so that it does not change
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testHCLConfig := TestConfigHCL(NodeID())
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loader := func(source config.Source) (*config.RuntimeConfig, []string, error) {
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opts := config.BuilderOpts{
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HCL: []string{testHCLConfig, portsConfig, a.HCL, hclDataDir},
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}
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overrides := []config.Source{
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config.FileSource{
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Name: "test-overrides",
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Format: "hcl",
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Data: a.Overrides},
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config.DefaultConsulSource(),
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config.DevConsulSource(),
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}
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cfg, warnings, err := config.Load(opts, source, overrides...)
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if cfg != nil {
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cfg.Telemetry.Disable = true
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}
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return cfg, warnings, err
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}
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bd, err := NewBaseDeps(loader, logOutput)
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require.NoError(t, err)
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bd.Logger = logger
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bd.MetricsHandler = metrics.NewInmemSink(1*time.Second, time.Minute)
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a.Config = bd.RuntimeConfig
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agent, err := New(bd)
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if err != nil {
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return fmt.Errorf("Error creating agent: %s", err)
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}
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id := string(a.Config.NodeID)
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if err := agent.Start(context.Background()); err != nil {
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agent.ShutdownAgent()
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agent.ShutdownEndpoints()
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return fmt.Errorf("%s %s Error starting agent: %s", id, name, err)
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}
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a.Agent = agent
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// Start the anti-entropy syncer
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a.Agent.StartSync()
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a.srv = &HTTPServer{agent: agent, denylist: NewDenylist(a.config.HTTPBlockEndpoints)}
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if err := a.waitForUp(); err != nil {
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a.Shutdown()
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t.Logf("Error while waiting for test agent to start: %v", err)
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return errwrap.Wrapf(name+": {{err}}", err)
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}
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a.dns = a.dnsServers[0]
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return nil
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}
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// waitForUp waits for leader election, or waits for the agent HTTP
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// endpoint to start responding, depending on the agent config.
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func (a *TestAgent) waitForUp() error {
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timer := retry.TwoSeconds()
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deadline := time.Now().Add(timer.Timeout)
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var retErr error
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var out structs.IndexedNodes
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for ; !time.Now().After(deadline); time.Sleep(timer.Wait) {
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if len(a.apiServers.servers) == 0 {
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retErr = fmt.Errorf("waiting for server")
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continue // fail, try again
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}
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if a.Config.Bootstrap && a.Config.ServerMode {
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// Ensure we have a leader and a node registration.
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args := &structs.DCSpecificRequest{
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Datacenter: a.Config.Datacenter,
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QueryOptions: structs.QueryOptions{
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MinQueryIndex: out.Index,
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MaxQueryTime: 25 * time.Millisecond,
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},
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}
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if err := a.RPC("Catalog.ListNodes", args, &out); err != nil {
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retErr = fmt.Errorf("Catalog.ListNodes failed: %v", err)
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continue // fail, try again
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}
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if !out.QueryMeta.KnownLeader {
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retErr = fmt.Errorf("No leader")
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continue // fail, try again
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}
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if out.Index == 0 {
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retErr = fmt.Errorf("Consul index is 0")
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continue // fail, try again
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}
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return nil // success
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} else {
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req := httptest.NewRequest("GET", "/v1/agent/self", nil)
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resp := httptest.NewRecorder()
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_, err := a.srv.AgentSelf(resp, req)
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if acl.IsErrPermissionDenied(err) || resp.Code == 403 {
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// permission denied is enough to show that the client is
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// connected to the servers as it would get a 503 if
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// it couldn't connect to them.
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} else if err != nil && resp.Code != 200 {
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retErr = fmt.Errorf("failed OK response: %v", err)
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continue
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}
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return nil // success
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}
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}
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return fmt.Errorf("unavailable. last error: %v", retErr)
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}
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// Shutdown stops the agent and removes the data directory if it is
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// managed by the test agent.
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func (a *TestAgent) Shutdown() error {
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/* Removed this because it was breaking persistence tests where we would
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persist a service and load it through a new agent with the same data-dir.
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Not sure if we still need this for other things, everywhere we manually make
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a data dir we already do 'defer os.RemoveAll()'
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defer func() {
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if a.DataDir != "" {
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os.RemoveAll(a.DataDir)
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}
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}()*/
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// already shut down
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if a.Agent == nil {
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return nil
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}
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// shutdown agent before endpoints
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defer a.Agent.ShutdownEndpoints()
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if err := a.Agent.ShutdownAgent(); err != nil {
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return err
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}
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<-a.Agent.ShutdownCh()
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return nil
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}
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func (a *TestAgent) DNSAddr() string {
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if a.dns == nil {
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return ""
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}
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return a.dns.Addr
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}
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func (a *TestAgent) HTTPAddr() string {
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addr, err := firstAddr(a.Agent.apiServers, "http")
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if err != nil {
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// TODO: t.Fatal instead of panic
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panic("no http server registered")
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}
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return addr.String()
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}
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// firstAddr is used by tests to look up the address for the first server which
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// matches the protocol
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func firstAddr(s *apiServers, protocol string) (net.Addr, error) {
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for _, srv := range s.servers {
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if srv.Protocol == protocol {
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return srv.Addr, nil
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}
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}
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return nil, fmt.Errorf("no server registered with protocol %v", protocol)
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}
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func (a *TestAgent) SegmentAddr(name string) string {
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if server, ok := a.Agent.delegate.(*consul.Server); ok {
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return server.LANSegmentAddr(name)
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}
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return ""
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}
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func (a *TestAgent) Client() *api.Client {
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conf := api.DefaultConfig()
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conf.Address = a.HTTPAddr()
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c, err := api.NewClient(conf)
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if err != nil {
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panic(fmt.Sprintf("Error creating consul API client: %s", err))
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}
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return c
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}
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// DNSDisableCompression disables compression for all started DNS servers.
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func (a *TestAgent) DNSDisableCompression(b bool) {
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for _, srv := range a.dnsServers {
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cfg := srv.config.Load().(*dnsConfig)
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cfg.DisableCompression = b
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}
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}
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// FIXME: this should t.Fatal on error, not panic.
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// TODO: rename to newConsulConfig
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// TODO: remove TestAgent receiver, accept a.Agent.config as an arg
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func (a *TestAgent) consulConfig() *consul.Config {
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c, err := newConsulConfig(a.Agent.config, a.Agent.logger)
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if err != nil {
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panic(err)
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}
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return c
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}
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// pickRandomPorts selects random ports from fixed size random blocks of
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// ports. This does not eliminate the chance for port conflict but
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// reduces it significantly with little overhead. Furthermore, asking
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// the kernel for a random port by binding to port 0 prolongs the test
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// execution (in our case +20sec) while also not fully eliminating the
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// chance of port conflicts for concurrently executed test binaries.
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// Instead of relying on one set of ports to be sufficient we retry
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// starting the agent with different ports on port conflict.
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func randomPortsSource(tls bool) (data string, returnPortsFn func()) {
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ports := freeport.MustTake(7)
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var http, https int
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if tls {
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http = -1
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https = ports[2]
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} else {
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http = ports[1]
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https = -1
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}
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return `
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ports = {
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dns = ` + strconv.Itoa(ports[0]) + `
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http = ` + strconv.Itoa(http) + `
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https = ` + strconv.Itoa(https) + `
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serf_lan = ` + strconv.Itoa(ports[3]) + `
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serf_wan = ` + strconv.Itoa(ports[4]) + `
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server = ` + strconv.Itoa(ports[5]) + `
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grpc = ` + strconv.Itoa(ports[6]) + `
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}
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`, func() { freeport.Return(ports) }
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}
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func NodeID() string {
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id, err := uuid.GenerateUUID()
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if err != nil {
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panic(err)
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}
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return id
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}
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// TestConfig returns a unique default configuration for testing an
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// agent.
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func TestConfig(logger hclog.Logger, sources ...config.Source) *config.RuntimeConfig {
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nodeID := NodeID()
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testsrc := config.FileSource{
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Name: "test",
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Format: "hcl",
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Data: `
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bind_addr = "127.0.0.1"
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advertise_addr = "127.0.0.1"
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datacenter = "dc1"
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bootstrap = true
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server = true
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node_id = "` + nodeID + `"
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node_name = "Node-` + nodeID + `"
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connect {
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enabled = true
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ca_config {
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cluster_id = "` + connect.TestClusterID + `"
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}
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}
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performance {
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raft_multiplier = 1
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}
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`,
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}
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b, err := config.NewBuilder(config.BuilderOpts{})
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if err != nil {
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panic("NewBuilder failed: " + err.Error())
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}
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b.Head = append(b.Head, testsrc)
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b.Tail = append(b.Tail, config.DefaultConsulSource(), config.DevConsulSource())
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b.Tail = append(b.Tail, sources...)
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cfg, err := b.BuildAndValidate()
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if err != nil {
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panic("Error building config: " + err.Error())
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}
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for _, w := range b.Warnings {
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logger.Warn(w)
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}
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// Effectively disables the delay after root rotation before requesting CSRs
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// to make test deterministic. 0 results in default jitter being applied but a
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// tiny delay is effectively thre same.
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cfg.ConnectTestCALeafRootChangeSpread = 1 * time.Nanosecond
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return &cfg
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}
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// TestACLConfig returns a default configuration for testing an agent
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// with ACLs.
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func TestACLConfig() string {
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return `
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acl_datacenter = "dc1"
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acl_default_policy = "deny"
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acl_master_token = "root"
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acl_agent_token = "root"
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acl_agent_master_token = "towel"
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`
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}
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const (
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TestDefaultMasterToken = "d9f05e83-a7ae-47ce-839e-c0d53a68c00a"
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TestDefaultAgentMasterToken = "bca580d4-db07-4074-b766-48acc9676955'"
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)
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type TestACLConfigParams struct {
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PrimaryDatacenter string
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DefaultPolicy string
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MasterToken string
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AgentToken string
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DefaultToken string
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AgentMasterToken string
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ReplicationToken string
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EnableTokenReplication bool
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}
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func DefaulTestACLConfigParams() *TestACLConfigParams {
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return &TestACLConfigParams{
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PrimaryDatacenter: "dc1",
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DefaultPolicy: "deny",
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MasterToken: TestDefaultMasterToken,
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AgentToken: TestDefaultMasterToken,
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AgentMasterToken: TestDefaultAgentMasterToken,
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}
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}
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func (p *TestACLConfigParams) HasConfiguredTokens() bool {
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return p.MasterToken != "" ||
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p.AgentToken != "" ||
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p.DefaultToken != "" ||
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p.AgentMasterToken != "" ||
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p.ReplicationToken != ""
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}
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func TestACLConfigNew() string {
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return TestACLConfigWithParams(&TestACLConfigParams{
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PrimaryDatacenter: "dc1",
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DefaultPolicy: "deny",
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MasterToken: "root",
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AgentToken: "root",
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AgentMasterToken: "towel",
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})
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}
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var aclConfigTpl = template.Must(template.New("ACL Config").Parse(`
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{{- if ne .PrimaryDatacenter "" -}}
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primary_datacenter = "{{ .PrimaryDatacenter }}"
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{{end -}}
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acl {
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enabled = true
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{{- if ne .DefaultPolicy ""}}
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default_policy = "{{ .DefaultPolicy }}"
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{{- end}}
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enable_token_replication = {{printf "%t" .EnableTokenReplication }}
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{{- if .HasConfiguredTokens}}
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|
tokens {
|
|
{{- if ne .MasterToken ""}}
|
|
master = "{{ .MasterToken }}"
|
|
{{- end}}
|
|
{{- if ne .AgentToken ""}}
|
|
agent = "{{ .AgentToken }}"
|
|
{{- end}}
|
|
{{- if ne .AgentMasterToken "" }}
|
|
agent_master = "{{ .AgentMasterToken }}"
|
|
{{- end}}
|
|
{{- if ne .DefaultToken "" }}
|
|
default = "{{ .DefaultToken }}"
|
|
{{- end}}
|
|
{{- if ne .ReplicationToken "" }}
|
|
replication = "{{ .ReplicationToken }}"
|
|
{{- end}}
|
|
}
|
|
{{- end}}
|
|
}
|
|
`))
|
|
|
|
func TestACLConfigWithParams(params *TestACLConfigParams) string {
|
|
var buf bytes.Buffer
|
|
|
|
cfg := params
|
|
if params == nil {
|
|
cfg = DefaulTestACLConfigParams()
|
|
}
|
|
|
|
err := aclConfigTpl.Execute(&buf, &cfg)
|
|
if err != nil {
|
|
panic(fmt.Sprintf("Failed to generate test ACL config: %v", err))
|
|
}
|
|
|
|
return buf.String()
|
|
}
|
|
|
|
// testTLSCertificates Generates a TLS CA and server key/cert and returns them
|
|
// in PEM encoded form.
|
|
func testTLSCertificates(serverName string) (cert string, key string, cacert string, err error) {
|
|
// generate CA
|
|
serial, err := tlsutil.GenerateSerialNumber()
|
|
if err != nil {
|
|
return "", "", "", err
|
|
}
|
|
signer, err := ecdsa.GenerateKey(elliptic.P256(), rand.New(rand.NewSource(99)))
|
|
if err != nil {
|
|
return "", "", "", err
|
|
}
|
|
ca, err := tlsutil.GenerateCA(signer, serial, 365, nil)
|
|
if err != nil {
|
|
return "", "", "", err
|
|
}
|
|
|
|
// generate leaf
|
|
serial, err = tlsutil.GenerateSerialNumber()
|
|
if err != nil {
|
|
return "", "", "", err
|
|
}
|
|
|
|
cert, privateKey, err := tlsutil.GenerateCert(
|
|
signer,
|
|
ca,
|
|
serial,
|
|
"Test Cert Name",
|
|
365,
|
|
[]string{serverName},
|
|
nil,
|
|
[]x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth, x509.ExtKeyUsageClientAuth},
|
|
)
|
|
if err != nil {
|
|
return "", "", "", err
|
|
}
|
|
|
|
return cert, privateKey, ca, nil
|
|
}
|