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