open-consul/command/leave.go

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2013-12-31 21:06:33 +00:00
package command
import (
"flag"
"fmt"
"github.com/mitchellh/cli"
"strings"
)
// LeaveCommand is a Command implementation that instructs
// the Consul agent to gracefully leave the cluster
type LeaveCommand struct {
Ui cli.Ui
}
func (c *LeaveCommand) Help() string {
helpText := `
Usage: consul leave
Causes the agent to gracefully leave the Consul cluster and shutdown.
Options:
-rpc-addr=127.0.0.1:8400 RPC address of the Consul agent.
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`
return strings.TrimSpace(helpText)
}
func (c *LeaveCommand) Run(args []string) int {
cmdFlags := flag.NewFlagSet("leave", flag.ContinueOnError)
cmdFlags.Usage = func() { c.Ui.Output(c.Help()) }
rpcAddr := RPCAddrFlag(cmdFlags)
if err := cmdFlags.Parse(args); err != nil {
return 1
}
nonFlagArgs := cmdFlags.Args()
if len(nonFlagArgs) > 0 {
c.Ui.Error(fmt.Sprintf("Error found unexpected args: %v", nonFlagArgs))
c.Ui.Output(c.Help())
return 1
}
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client, err := RPCClient(*rpcAddr)
if err != nil {
c.Ui.Error(fmt.Sprintf("Error connecting to Consul agent: %s", err))
return 1
}
defer client.Close()
if err := client.Leave(); err != nil {
c.Ui.Error(fmt.Sprintf("Error leaving: %s", err))
return 1
}
c.Ui.Output("Graceful leave complete")
return 0
}
func (c *LeaveCommand) Synopsis() string {
return "Gracefully leaves the Consul cluster and shuts down"
}