package shell import ( "io" ) func init() { Commands = append(Commands, &commandUnlock{}) Commands = append(Commands, &commandLock{}) } // =========== Lock ============== type commandLock struct { } func (c *commandLock) Name() string { return "lock" } func (c *commandLock) Help() string { return `lock in order to exclusively manage the cluster This is a blocking operation if there is alread another lock. ` } func (c *commandLock) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) { commandEnv.locker.RequestLock() return nil } // =========== Unlock ============== type commandUnlock struct { } func (c *commandUnlock) Name() string { return "unlock" } func (c *commandUnlock) Help() string { return `unlock the cluster-wide lock ` } func (c *commandUnlock) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) { commandEnv.locker.ReleaseLock() return nil }