package join import ( "flag" "fmt" "github.com/mitchellh/cli" "github.com/hashicorp/consul/command/flags" ) func New(ui cli.Ui) *cmd { c := &cmd{UI: ui} c.init() return c } type cmd struct { UI cli.Ui flags *flag.FlagSet http *flags.HTTPFlags help string wan bool } func (c *cmd) init() { c.flags = flag.NewFlagSet("", flag.ContinueOnError) c.flags.BoolVar(&c.wan, "wan", false, "Joins a server to another server in the WAN pool.") c.http = &flags.HTTPFlags{} flags.Merge(c.flags, c.http.ClientFlags()) flags.Merge(c.flags, c.http.PartitionFlag()) c.help = flags.Usage(help, c.flags) } func (c *cmd) Run(args []string) int { if err := c.flags.Parse(args); err != nil { return 1 } addrs := c.flags.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 := c.http.APIClient() if err != nil { c.UI.Error(fmt.Sprintf("Error connecting to Consul agent: %s", err)) return 1 } joins := 0 for _, addr := range addrs { err := client.Agent().Join(addr, c.wan) if err != nil { c.UI.Error(fmt.Sprintf("Error joining address '%s': %s", addr, err)) } else { joins++ } } if joins == 0 { c.UI.Error("Failed to join any nodes.") return 1 } c.UI.Output(fmt.Sprintf("Successfully joined cluster by contacting %d nodes.", joins)) return 0 } func (c *cmd) Synopsis() string { return synopsis } func (c *cmd) Help() string { return c.help } const synopsis = "Tell Consul agent to join cluster" const help = ` Usage: consul join [options] address ... Tells a running Consul agent (with "consul agent") to join the cluster by specifying at least one existing member. `