package command import ( "flag" "fmt" "github.com/mitchellh/cli" "strings" ) // JoinCommand is a Command implementation that tells a running Consul // agent to join another. type JoinCommand struct { Ui cli.Ui } func (c *JoinCommand) Help() string { helpText := ` Usage: consul join [options] address ... Tells a running Consul agent (with "consul agent") to join the cluster by specifying at least one existing member. Options: -rpc-addr=127.0.0.1:7373 RPC address of the Consul agent. -wan Joins a server to another server in the WAN pool ` return strings.TrimSpace(helpText) } func (c *JoinCommand) Run(args []string) int { var wan bool cmdFlags := flag.NewFlagSet("join", flag.ContinueOnError) cmdFlags.Usage = func() { c.Ui.Output(c.Help()) } cmdFlags.BoolVar(&wan, "wan", false, "wan") rpcAddr := RPCAddrFlag(cmdFlags) if err := cmdFlags.Parse(args); err != nil { return 1 } addrs := cmdFlags.Args() if len(addrs) == 0 { c.Ui.Error("At least one address to join must be specified.") c.Ui.Error("") c.Ui.Error(c.Help()) return 1 } client, err := RPCClient(*rpcAddr) if err != nil { c.Ui.Error(fmt.Sprintf("Error connecting to Consul agent: %s", err)) return 1 } defer client.Close() n, err := client.Join(addrs, wan) if err != nil { c.Ui.Error(fmt.Sprintf("Error joining the cluster: %s", err)) return 1 } c.Ui.Output(fmt.Sprintf( "Successfully joined cluster by contacting %d nodes.", n)) return 0 } func (c *JoinCommand) Synopsis() string { return "Tell Consul agent to join cluster" }