open-consul/command/join.go

71 lines
1.5 KiB
Go
Raw Normal View History

2013-12-31 21:06:33 +00:00
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=127.0.0.1:8400 RPC address of the Consul agent.
-wan Joins a server to another server in the WAN pool
2013-12-31 21:06:33 +00:00
`
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"
}