refactor: delete update specific code

Signed-off-by: Michael Wan <zirenwan@gmail.com>

Author: HusterWan

apis/plugins/ContainerPlugin.go

@@ -12,12 +12,16 @@ type ContainerPlugin interface {
 	// used to sort the pre start array that pass to runc, network plugin hook always has priority value 0.
 	PreStart(interface{}) ([]int, [][]string, error)
 
-	//NetworkGenericParams accepts the container id and env of this container and returns the priority of this endpoint
+	// PreCreateEndpoint accepts the container id and env of this container and returns the priority of this endpoint
 	// and if this endpoint should enable resolver and a map which will be used as generic params to create endpoints of
 	// this container
 	PreCreateEndpoint(string, []string) (priority int, disableResolver bool, genericParam map[string]interface{})
 
 	// PreUpdate defines plugin point where receives a container update request, in this plugin point user
 	// could change the container update body passed-in by http request body
 	PreUpdate(io.ReadCloser) (io.ReadCloser, error)
+
+	// PostUpdate called after update method successful,
+	// the method accepts the rootfs path and envs of container
+	PostUpdate(string, []string) error
 }

daemon/mgr/container.go

@@ -930,13 +930,13 @@ func (mgr *ContainerManager) Update(ctx context.Context, name string, config *ty
 	}
 
 	restore := false
-	configBack := *c.Config
-	hostconfigBack := *c.HostConfig
+	oldConfig := *c.Config
+	oldHostconfig := *c.HostConfig
 	defer func() {
 		if restore {
 			c.Lock()
-			c.Config = &configBack
-			c.HostConfig = &hostconfigBack
+			c.Config = &oldConfig
+			c.HostConfig = &oldHostconfig
 			c.Unlock()
 		}
 	}()
@@ -974,20 +974,6 @@ func (mgr *ContainerManager) Update(ctx context.Context, name string, config *ty
 			}
 		}
 	}
-
-	// TODO(ziren): we should use meta.Config.DiskQuota to record container diskquota
-	// compatibility with alidocker, when set DiskQuota for container
-	// add a DiskQuota label
-	if config.DiskQuota != nil {
-		if _, ok := c.Config.Labels["DiskQuota"]; ok {
-			labels := []string{}
-			for dir, quota := range c.Config.DiskQuota {
-				labels = append(labels, fmt.Sprintf("%s=%s", dir, quota))
-			}
-			c.Config.Labels["DiskQuota"] = strings.Join(labels, ";")
-		}
-	}
-
 	c.Unlock()
 
 	// update Resources of a container.
@@ -1020,6 +1006,12 @@ func (mgr *ContainerManager) Update(ctx context.Context, name string, config *ty
 	}
 	c.Config.Env = newEnvSlice
 
+	if mgr.containerPlugin != nil {
+		if err = mgr.containerPlugin.PostUpdate(c.BaseFS, c.Config.Env); err != nil {
+			return err
+		}
+	}
+
 	// If container is not running, update container metadata struct is enough,
 	// resources will be updated when the container is started again,
 	// If container is running, we need to update configs to the real world.