72ee028cab
This commit wires together the graceful delete option for pods on the Kubelet. When a pod is deleted on the API server, a grace period is calculated that is based on the Pod.Spec.TerminationGracePeriodInSeconds, the user's provided grace period, or a default. The grace period can only shrink once set. The value provided by the user (or the default) is set onto metadata as DeletionGracePeriod. When the Kubelet sees a pod with DeletionTimestamp set, it uses the value of ObjectMeta.GracePeriodSeconds as the grace period sent to Docker. When updating status, if the pod has DeletionTimestamp set and all containers are terminated, the Kubelet will update the status one last time and then invoke Delete(pod, grace: 0) to clean up the pod immediately.
77 lines
2.9 KiB
Go
77 lines
2.9 KiB
Go
/*
|
|
Copyright 2014 The Kubernetes Authors All rights reserved.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package rest
|
|
|
|
import (
|
|
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
|
|
"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
|
|
)
|
|
|
|
// RESTDeleteStrategy defines deletion behavior on an object that follows Kubernetes
|
|
// API conventions.
|
|
type RESTDeleteStrategy interface {
|
|
runtime.ObjectTyper
|
|
|
|
// CheckGracefulDelete should return true if the object can be gracefully deleted and set
|
|
// any default values on the DeleteOptions.
|
|
CheckGracefulDelete(obj runtime.Object, options *api.DeleteOptions) bool
|
|
}
|
|
|
|
// BeforeDelete tests whether the object can be gracefully deleted. If graceful is set the object
|
|
// should be gracefully deleted, if gracefulPending is set the object has already been gracefully deleted
|
|
// (and the provided grace period is longer than the time to deletion), and an error is returned if the
|
|
// condition cannot be checked or the gracePeriodSeconds is invalid. The options argument may be updated with
|
|
// default values if graceful is true.
|
|
func BeforeDelete(strategy RESTDeleteStrategy, ctx api.Context, obj runtime.Object, options *api.DeleteOptions) (graceful, gracefulPending bool, err error) {
|
|
if strategy == nil {
|
|
return false, false, nil
|
|
}
|
|
objectMeta, _, kerr := objectMetaAndKind(strategy, obj)
|
|
if kerr != nil {
|
|
return false, false, kerr
|
|
}
|
|
|
|
// if the object is already being deleted
|
|
if objectMeta.DeletionTimestamp != nil {
|
|
// if we are already being deleted, we may only shorten the deletion grace period
|
|
// this means the object was gracefully deleted previously but deletionGracePeriodSeconds was not set,
|
|
// so we force deletion immediately
|
|
if objectMeta.DeletionGracePeriodSeconds == nil {
|
|
return false, false, nil
|
|
}
|
|
// only a shorter grace period may be provided by a user
|
|
if options.GracePeriodSeconds != nil {
|
|
period := int64(*options.GracePeriodSeconds)
|
|
if period > *objectMeta.DeletionGracePeriodSeconds {
|
|
return false, true, nil
|
|
}
|
|
objectMeta.DeletionGracePeriodSeconds = &period
|
|
options.GracePeriodSeconds = &period
|
|
return true, false, nil
|
|
}
|
|
// graceful deletion is pending, do nothing
|
|
options.GracePeriodSeconds = objectMeta.DeletionGracePeriodSeconds
|
|
return false, true, nil
|
|
}
|
|
|
|
if !strategy.CheckGracefulDelete(obj, options) {
|
|
return false, false, nil
|
|
}
|
|
objectMeta.DeletionGracePeriodSeconds = options.GracePeriodSeconds
|
|
return true, false, nil
|
|
}
|