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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// ForceLeaveCommand is a Command implementation that tells a running Serf
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// to force a member to enter the "left" state.
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type ForceLeaveCommand struct {
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Ui cli.Ui
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}
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var _ cli.Command = &ForceLeaveCommand{}
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func (c *ForceLeaveCommand) Run(args []string) int {
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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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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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nodes := cmdFlags.Args()
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if len(nodes) != 1 {
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c.Ui.Error("A node name must be specified to force leave.")
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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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err = client.ForceLeave(nodes[0])
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error force leaving: %s", err))
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return 1
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}
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return 0
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}
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func (c *ForceLeaveCommand) Synopsis() string {
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return "Forces a member of the cluster to enter the \"left\" state"
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}
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func (c *ForceLeaveCommand) Help() string {
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helpText := `
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Usage: serf force-leave [options] name
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Forces a member of a Serf cluster to enter the "left" state. Note
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that if the member is still actually alive, it will eventually rejoin
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the cluster. This command is most useful for cleaning out "failed" nodes
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that are never coming back. If you do not force leave a failed node,
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Serf will attempt to reconnect to those failed nodes for some period of
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time before eventually reaping them.
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Options:
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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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