// CheckGracefulDelete allows a pod to be gracefully deleted. It updates the DeleteOptions to
// reflect the desired grace value.
func (podStrategy) CheckGracefulDelete(obj runtime.Object, options *api.DeleteOptions) bool {
if options == nil {
return false
}
pod := obj.(*api.Pod)
period := int64(0)
// user has specified a value
if options.GracePeriodSeconds != nil {
period = *options.GracePeriodSeconds
} else {
// use the default value if set, or deletes the pod immediately (0)
if pod.Spec.TerminationGracePeriodSeconds != nil {
period = *pod.Spec.TerminationGracePeriodSeconds
}
}
// if the pod is not scheduled, delete immediately
if len(pod.Spec.NodeName) == 0 {
period = 0
}
// if the pod is already terminated, delete immediately
if pod.Status.Phase == api.PodFailed || pod.Status.Phase == api.PodSucceeded {
period = 0
}
// ensure the options and the pod are in sync
options.GracePeriodSeconds = &period
return true
}
// 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
}
now := unversioned.NewTime(unversioned.Now().Add(time.Second * time.Duration(*options.GracePeriodSeconds)))
objectMeta.DeletionTimestamp = &now
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
}
now := unversioned.NewTime(unversioned.Now().Add(time.Second * time.Duration(*options.GracePeriodSeconds)))
objectMeta.DeletionTimestamp = &now
objectMeta.DeletionGracePeriodSeconds = options.GracePeriodSeconds
return true, false, nil
}