Moved handling advertise address to readConfig and out of the agent's constructor, plus unit test fixes

agent/agent.go

@@ -5,7 +5,6 @@ import (
 	"crypto/sha512"
 	"crypto/tls"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -30,7 +29,6 @@ import (
 	"github.com/hashicorp/consul/logger"
 	"github.com/hashicorp/consul/types"
 	"github.com/hashicorp/consul/watch"
-	"github.com/hashicorp/go-sockaddr/template"
 	"github.com/hashicorp/go-uuid"
 	"github.com/hashicorp/raft"
 	"github.com/hashicorp/serf/coordinate"
@@ -229,34 +227,6 @@ func New(c *Config) (*Agent, error) {
 		tokens:          new(token.Store),
 	}
 
-	// Try to get an advertise address
-	switch {
-
-	case a.config.BindAddr != "" && !ipaddr.IsAny(a.config.BindAddr):
-		a.config.AdvertiseAddr = a.config.BindAddr
-
-	default:
-		ip, err := consul.GetPrivateIP()
-		if ipaddr.IsAnyV6(a.config.BindAddr) {
-			ip, err = consul.GetPublicIPv6()
-		}
-		if err != nil {
-			return nil, fmt.Errorf("Failed to get advertise address: %v", err)
-		}
-		a.config.AdvertiseAddr = ip.String()
-	}
-
-	// Try to get an advertise address for the wan
-	if a.config.AdvertiseAddrWan == "" {
-		a.config.AdvertiseAddrWan = a.config.AdvertiseAddr
-	}
-
-	// Create the default set of tagged addresses.
-	a.config.TaggedAddresses = map[string]string{
-		"lan": a.config.AdvertiseAddr,
-		"wan": a.config.AdvertiseAddrWan,
-	}
-
 	// Set up the initial state of the token store based on the config.
 	a.tokens.UpdateUserToken(a.config.ACLToken)
 	a.tokens.UpdateAgentToken(a.config.ACLAgentToken)
@@ -799,25 +769,6 @@ func (a *Agent) consulConfig() (*consul.Config, error) {
 	return base, nil
 }
 
-// parseSingleIPTemplate is used as a helper function to parse out a single IP
-// address from a config parameter.
-func parseSingleIPTemplate(ipTmpl string) (string, error) {
-	out, err := template.Parse(ipTmpl)
-	if err != nil {
-		return "", fmt.Errorf("Unable to parse address template %q: %v", ipTmpl, err)
-	}
-
-	ips := strings.Split(out, " ")
-	switch len(ips) {
-	case 0:
-		return "", errors.New("No addresses found, please configure one.")
-	case 1:
-		return ips[0], nil
-	default:
-		return "", fmt.Errorf("Multiple addresses found (%q), please configure one.", out)
-	}
-}
-
 // makeRandomID will generate a random UUID for a node.
 func (a *Agent) makeRandomID() (string, error) {
 	id, err := uuid.GenerateUUID()

agent/agent_test.go

@@ -117,6 +117,7 @@ func TestAgent_CheckAdvertiseAddrsSettings(t *testing.T) {
 	cfg.AdvertiseAddrs.SerfLan, _ = net.ResolveTCPAddr("tcp", "127.0.0.42:1233")
 	cfg.AdvertiseAddrs.SerfWan, _ = net.ResolveTCPAddr("tcp", "127.0.0.43:1234")
 	cfg.AdvertiseAddrs.RPC, _ = net.ResolveTCPAddr("tcp", "127.0.0.44:1235")
+	cfg.SetupTaggedAndAdvertiseAddrs()
 	a := NewTestAgent(t.Name(), cfg)
 	defer a.Shutdown()
 

agent/config.go

@@ -16,10 +16,12 @@ import (
 
 	"github.com/hashicorp/consul/agent/consul"
 	"github.com/hashicorp/consul/agent/consul/structs"
+	"github.com/hashicorp/consul/ipaddr"
 	"github.com/hashicorp/consul/lib"
 	"github.com/hashicorp/consul/tlsutil"
 	"github.com/hashicorp/consul/types"
 	"github.com/hashicorp/consul/watch"
+	"github.com/hashicorp/go-sockaddr/template"
 	"github.com/mitchellh/mapstructure"
 )
 
@@ -2203,18 +2205,61 @@ func (c *Config) ResolveTmplAddrs() error {
 		c.SerfWanBindAddr = ipStr
 	}
 
-	// Parse all tagged addresses
-	for k, v := range c.TaggedAddresses {
-		ipStr, err := parseSingleIPTemplate(v)
-		if err != nil {
-			return fmt.Errorf("%s address resolution failed: %v", k, err)
-		}
-		c.TaggedAddresses[k] = ipStr
+	return nil
 }
 
+// Additional post processing of the configs to set tagged and advertise addresses
+func (cfg *Config) SetupTaggedAndAdvertiseAddrs() error {
+	if cfg.AdvertiseAddr == "" {
+		switch {
+
+		case cfg.BindAddr != "" && !ipaddr.IsAny(cfg.BindAddr):
+			cfg.AdvertiseAddr = cfg.BindAddr
+
+		default:
+			ip, err := consul.GetPrivateIP()
+			if ipaddr.IsAnyV6(cfg.BindAddr) {
+				ip, err = consul.GetPublicIPv6()
+			}
+			if err != nil {
+				return fmt.Errorf("Failed to get advertise address: %v", err)
+			}
+			cfg.AdvertiseAddr = ip.String()
+		}
+	}
+
+	// Try to get an advertise address for the wan
+	if cfg.AdvertiseAddrWan == "" {
+		cfg.AdvertiseAddrWan = cfg.AdvertiseAddr
+	}
+
+	// Create the default set of tagged addresses.
+	cfg.TaggedAddresses = map[string]string{
+		"lan": cfg.AdvertiseAddr,
+		"wan": cfg.AdvertiseAddrWan,
+	}
 	return nil
 }
 
+// parseSingleIPTemplate is used as a helper function to parse out a single IP
+// address from a config parameter.
+func parseSingleIPTemplate(ipTmpl string) (string, error) {
+	out, err := template.Parse(ipTmpl)
+	if err != nil {
+		return "", fmt.Errorf("Unable to parse address template %q: %v", ipTmpl, err)
+	}
+
+	ips := strings.Split(out, " ")
+	switch len(ips) {
+	case 0:
+		return "", errors.New("No addresses found, please configure one.")
+	case 1:
+		return ips[0], nil
+	default:
+		return "", fmt.Errorf("Multiple addresses found (%q), please configure one.", out)
+	}
+}
+
 // Implement the sort interface for dirEnts
 func (d dirEnts) Len() int {
 	return len(d)

agent/local_test.go

@@ -14,7 +14,9 @@ import (
 
 func TestAgentAntiEntropy_Services(t *testing.T) {
 	t.Parallel()
-	a := &TestAgent{Name: t.Name(), NoInitialSync: true}
+	cfg := TestConfig()
+	a := &TestAgent{Name: t.Name(), NoInitialSync: true, Config: cfg}
+
 	a.Start()
 	defer a.Shutdown()
 
@@ -670,8 +672,10 @@ func TestAgentAntiEntropy_Services_ACLDeny(t *testing.T) {
 
 func TestAgentAntiEntropy_Checks(t *testing.T) {
 	t.Parallel()
-	a := &TestAgent{Name: t.Name(), NoInitialSync: true}
+	cfg := TestConfig()
+	a := &TestAgent{Name: t.Name(), NoInitialSync: true, Config: cfg}
 	a.Start()
+
 	defer a.Shutdown()
 
 	// Register info

agent/testagent.go

@@ -334,6 +334,7 @@ func TestConfig() *Config {
 
 	ccfg.CoordinateUpdatePeriod = 100 * time.Millisecond
 	ccfg.ServerHealthInterval = 10 * time.Millisecond
+	cfg.SetupTaggedAndAdvertiseAddrs()
 	return cfg
 }
 

command/agent.go

@@ -466,6 +466,13 @@ func (cmd *AgentCommand) readConfig() *agent.Config {
 		cmd.UI.Error(fmt.Sprintf("Failed to parse config: %v", err))
 		return nil
 	}
+	// More post processing of the config
+	if err := cfg.SetupTaggedAndAdvertiseAddrs(); err != nil {
+		cmd.UI.Error(fmt.Sprintf("Failed to set up tagged and advertise addresses: %v", err))
+		return nil
+	}
+	// Try to get an advertise address if not set
+
 	return cfg
 }
 

command/agent_test.go

@@ -176,6 +176,7 @@ func TestReadCliConfig(t *testing.T) {
 			args: []string{
 				"-data-dir", tmpDir,
 				"-node", `"a"`,
+				"-bind", "1.2.3.4",
 				"-advertise-wan", "1.2.3.4",
 				"-serf-wan-bind", "4.3.2.1",
 				"-serf-lan-bind", "4.3.2.2",
@@ -207,6 +208,7 @@ func TestReadCliConfig(t *testing.T) {
 				"-data-dir", tmpDir,
 				"-node-meta", "somekey:somevalue",
 				"-node-meta", "otherkey:othervalue",
+				"-bind", "1.2.3.4",
 			},
 			ShutdownCh:  shutdownCh,
 			BaseCommand: baseCommand(cli.NewMockUi()),
@@ -229,6 +231,7 @@ func TestReadCliConfig(t *testing.T) {
 				"-node", `"server1"`,
 				"-server",
 				"-data-dir", tmpDir,
+				"-bind", "1.2.3.4",
 			},
 			ShutdownCh:  shutdownCh,
 			BaseCommand: baseCommand(ui),
@@ -256,6 +259,7 @@ func TestReadCliConfig(t *testing.T) {
 			args: []string{
 				"-data-dir", tmpDir,
 				"-node", `"client"`,
+				"-bind", "1.2.3.4",
 			},
 			ShutdownCh:  shutdownCh,
 			BaseCommand: baseCommand(ui),
@@ -301,6 +305,7 @@ func TestAgent_HostBasedIDs(t *testing.T) {
 		cmd := &AgentCommand{
 			args: []string{
 				"-data-dir", tmpDir,
+				"-bind", "127.0.0.1",
 			},
 			BaseCommand: baseCommand(cli.NewMockUi()),
 		}
@@ -317,6 +322,7 @@ func TestAgent_HostBasedIDs(t *testing.T) {
 			args: []string{
 				"-data-dir", tmpDir,
 				"-disable-host-node-id=false",
+				"-bind", "127.0.0.1",
 			},
 			BaseCommand: baseCommand(cli.NewMockUi()),
 		}