seaweedfs/weed/shell/command_fs_lock_unlock.go

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package shell
import (
"github.com/chrislusf/seaweedfs/weed/util"
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"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(util.DetectedHostAddress())
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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
}