cleanup the sandbox after it exited

Signed-off-by: fupan <[email protected]>

daemon/pod/decommission.go

@@ -49,10 +49,11 @@ func (p *XPod) ForceQuit() {
 }
 
 func (p *XPod) Remove(force bool) error {
+	var err error
 
 	if p.IsRunning() {
 		if !force {
-			err := fmt.Errorf("pod is running, cannot be removed")
+			err = fmt.Errorf("pod is running, cannot be removed")
 			p.Log(ERROR, err)
 			return err
 		}
@@ -624,6 +625,11 @@ func (p *XPod) decommissionResources() (err error) {
 		}
 	}
 
+	err = p.sandbox.Delete()
+	if err != nil {
+		p.Log(ERROR, "remove sandbox failed: %v", err)
+	}
+
 	p.sandbox = nil
 
 	cleanupHosts(p.Id())