mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-23 21:40:20 +00:00
257 lines
10 KiB
Go
257 lines
10 KiB
Go
/*
|
|
Copyright 2014 The Kubernetes Authors.
|
|
|
|
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 kubectl
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"k8s.io/apimachinery/pkg/api/errors"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
|
"k8s.io/apimachinery/pkg/util/wait"
|
|
"k8s.io/apimachinery/pkg/watch"
|
|
"k8s.io/kubernetes/pkg/api/pod"
|
|
"k8s.io/kubernetes/pkg/apis/apps"
|
|
api "k8s.io/kubernetes/pkg/apis/core"
|
|
"k8s.io/kubernetes/pkg/apis/extensions"
|
|
appsclient "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/typed/apps/internalversion"
|
|
coreclient "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/typed/core/internalversion"
|
|
extensionsclient "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/typed/extensions/internalversion"
|
|
)
|
|
|
|
// ControllerHasDesiredReplicas returns a condition that will be true if and only if
|
|
// the desired replica count for a controller's ReplicaSelector equals the Replicas count.
|
|
func ControllerHasDesiredReplicas(rcClient coreclient.ReplicationControllersGetter, controller *api.ReplicationController) wait.ConditionFunc {
|
|
|
|
// If we're given a controller where the status lags the spec, it either means that the controller is stale,
|
|
// or that the rc manager hasn't noticed the update yet. Polling status.Replicas is not safe in the latter case.
|
|
desiredGeneration := controller.Generation
|
|
|
|
return func() (bool, error) {
|
|
ctrl, err := rcClient.ReplicationControllers(controller.Namespace).Get(controller.Name, metav1.GetOptions{})
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
// There's a chance a concurrent update modifies the Spec.Replicas causing this check to pass,
|
|
// or, after this check has passed, a modification causes the rc manager to create more pods.
|
|
// This will not be an issue once we've implemented graceful delete for rcs, but till then
|
|
// concurrent stop operations on the same rc might have unintended side effects.
|
|
return ctrl.Status.ObservedGeneration >= desiredGeneration && ctrl.Status.Replicas == ctrl.Spec.Replicas, nil
|
|
}
|
|
}
|
|
|
|
// ReplicaSetHasDesiredReplicas returns a condition that will be true if and only if
|
|
// the desired replica count for a ReplicaSet's ReplicaSelector equals the Replicas count.
|
|
func ReplicaSetHasDesiredReplicas(rsClient extensionsclient.ReplicaSetsGetter, replicaSet *extensions.ReplicaSet) wait.ConditionFunc {
|
|
|
|
// If we're given a ReplicaSet where the status lags the spec, it either means that the
|
|
// ReplicaSet is stale, or that the ReplicaSet manager hasn't noticed the update yet.
|
|
// Polling status.Replicas is not safe in the latter case.
|
|
desiredGeneration := replicaSet.Generation
|
|
|
|
return func() (bool, error) {
|
|
rs, err := rsClient.ReplicaSets(replicaSet.Namespace).Get(replicaSet.Name, metav1.GetOptions{})
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
// There's a chance a concurrent update modifies the Spec.Replicas causing this check to
|
|
// pass, or, after this check has passed, a modification causes the ReplicaSet manager to
|
|
// create more pods. This will not be an issue once we've implemented graceful delete for
|
|
// ReplicaSets, but till then concurrent stop operations on the same ReplicaSet might have
|
|
// unintended side effects.
|
|
return rs.Status.ObservedGeneration >= desiredGeneration && rs.Status.Replicas == rs.Spec.Replicas, nil
|
|
}
|
|
}
|
|
|
|
// StatefulSetHasDesiredReplicas returns a condition that checks the number of StatefulSet replicas
|
|
func StatefulSetHasDesiredReplicas(ssClient appsclient.StatefulSetsGetter, ss *apps.StatefulSet) wait.ConditionFunc {
|
|
// If we're given a StatefulSet where the status lags the spec, it either means that the
|
|
// StatefulSet is stale, or that the StatefulSet manager hasn't noticed the update yet.
|
|
// Polling status.Replicas is not safe in the latter case.
|
|
desiredGeneration := ss.Generation
|
|
return func() (bool, error) {
|
|
ss, err := ssClient.StatefulSets(ss.Namespace).Get(ss.Name, metav1.GetOptions{})
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
// There's a chance a concurrent update modifies the Spec.Replicas causing this check to
|
|
// pass, or, after this check has passed, a modification causes the StatefulSet manager to
|
|
// create more pods. This will not be an issue once we've implemented graceful delete for
|
|
// StatefulSet, but till then concurrent stop operations on the same StatefulSet might have
|
|
// unintended side effects.
|
|
return ss.Status.ObservedGeneration != nil && *ss.Status.ObservedGeneration >= desiredGeneration && ss.Status.Replicas == ss.Spec.Replicas, nil
|
|
}
|
|
}
|
|
|
|
// DeploymentHasDesiredReplicas returns a condition that will be true if and only if
|
|
// the desired replica count for a deployment equals its updated replicas count.
|
|
// (non-terminated pods that have the desired template spec).
|
|
func DeploymentHasDesiredReplicas(dClient extensionsclient.DeploymentsGetter, deployment *extensions.Deployment) wait.ConditionFunc {
|
|
// If we're given a deployment where the status lags the spec, it either
|
|
// means that the deployment is stale, or that the deployment manager hasn't
|
|
// noticed the update yet. Polling status.Replicas is not safe in the latter
|
|
// case.
|
|
desiredGeneration := deployment.Generation
|
|
|
|
return func() (bool, error) {
|
|
deployment, err := dClient.Deployments(deployment.Namespace).Get(deployment.Name, metav1.GetOptions{})
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
return deployment.Status.ObservedGeneration >= desiredGeneration &&
|
|
deployment.Status.UpdatedReplicas == deployment.Spec.Replicas, nil
|
|
}
|
|
}
|
|
|
|
// ErrPodCompleted is returned by PodRunning or PodContainerRunning to indicate that
|
|
// the pod has already reached completed state.
|
|
var ErrPodCompleted = fmt.Errorf("pod ran to completion")
|
|
|
|
// ErrContainerTerminated is returned by PodContainerRunning in the intermediate
|
|
// state where the pod indicates it's still running, but its container is already terminated
|
|
var ErrContainerTerminated = fmt.Errorf("container terminated")
|
|
|
|
// PodRunning returns true if the pod is running, false if the pod has not yet reached running state,
|
|
// returns ErrPodCompleted if the pod has run to completion, or an error in any other case.
|
|
func PodRunning(event watch.Event) (bool, error) {
|
|
switch event.Type {
|
|
case watch.Deleted:
|
|
return false, errors.NewNotFound(schema.GroupResource{Resource: "pods"}, "")
|
|
}
|
|
switch t := event.Object.(type) {
|
|
case *api.Pod:
|
|
switch t.Status.Phase {
|
|
case api.PodRunning:
|
|
return true, nil
|
|
case api.PodFailed, api.PodSucceeded:
|
|
return false, ErrPodCompleted
|
|
}
|
|
}
|
|
return false, nil
|
|
}
|
|
|
|
// PodCompleted returns true if the pod has run to completion, false if the pod has not yet
|
|
// reached running state, or an error in any other case.
|
|
func PodCompleted(event watch.Event) (bool, error) {
|
|
switch event.Type {
|
|
case watch.Deleted:
|
|
return false, errors.NewNotFound(schema.GroupResource{Resource: "pods"}, "")
|
|
}
|
|
switch t := event.Object.(type) {
|
|
case *api.Pod:
|
|
switch t.Status.Phase {
|
|
case api.PodFailed, api.PodSucceeded:
|
|
return true, nil
|
|
}
|
|
}
|
|
return false, nil
|
|
}
|
|
|
|
// PodRunningAndReady returns true if the pod is running and ready, false if the pod has not
|
|
// yet reached those states, returns ErrPodCompleted if the pod has run to completion, or
|
|
// an error in any other case.
|
|
func PodRunningAndReady(event watch.Event) (bool, error) {
|
|
switch event.Type {
|
|
case watch.Deleted:
|
|
return false, errors.NewNotFound(schema.GroupResource{Resource: "pods"}, "")
|
|
}
|
|
switch t := event.Object.(type) {
|
|
case *api.Pod:
|
|
switch t.Status.Phase {
|
|
case api.PodFailed, api.PodSucceeded:
|
|
return false, ErrPodCompleted
|
|
case api.PodRunning:
|
|
return pod.IsPodReady(t), nil
|
|
}
|
|
}
|
|
return false, nil
|
|
}
|
|
|
|
// PodNotPending returns true if the pod has left the pending state, false if it has not,
|
|
// or an error in any other case (such as if the pod was deleted).
|
|
func PodNotPending(event watch.Event) (bool, error) {
|
|
switch event.Type {
|
|
case watch.Deleted:
|
|
return false, errors.NewNotFound(schema.GroupResource{Resource: "pods"}, "")
|
|
}
|
|
switch t := event.Object.(type) {
|
|
case *api.Pod:
|
|
switch t.Status.Phase {
|
|
case api.PodPending:
|
|
return false, nil
|
|
default:
|
|
return true, nil
|
|
}
|
|
}
|
|
return false, nil
|
|
}
|
|
|
|
// PodContainerRunning returns false until the named container has ContainerStatus running (at least once),
|
|
// and will return an error if the pod is deleted, runs to completion, or the container pod is not available.
|
|
func PodContainerRunning(containerName string) watch.ConditionFunc {
|
|
return func(event watch.Event) (bool, error) {
|
|
switch event.Type {
|
|
case watch.Deleted:
|
|
return false, errors.NewNotFound(schema.GroupResource{Resource: "pods"}, "")
|
|
}
|
|
switch t := event.Object.(type) {
|
|
case *api.Pod:
|
|
switch t.Status.Phase {
|
|
case api.PodRunning, api.PodPending:
|
|
case api.PodFailed, api.PodSucceeded:
|
|
return false, ErrPodCompleted
|
|
default:
|
|
return false, nil
|
|
}
|
|
for _, s := range t.Status.ContainerStatuses {
|
|
if s.Name != containerName {
|
|
continue
|
|
}
|
|
if s.State.Terminated != nil {
|
|
return false, ErrContainerTerminated
|
|
}
|
|
return s.State.Running != nil, nil
|
|
}
|
|
for _, s := range t.Status.InitContainerStatuses {
|
|
if s.Name != containerName {
|
|
continue
|
|
}
|
|
if s.State.Terminated != nil {
|
|
return false, ErrContainerTerminated
|
|
}
|
|
return s.State.Running != nil, nil
|
|
}
|
|
return false, nil
|
|
}
|
|
return false, nil
|
|
}
|
|
}
|
|
|
|
// ServiceAccountHasSecrets returns true if the service account has at least one secret,
|
|
// false if it does not, or an error.
|
|
func ServiceAccountHasSecrets(event watch.Event) (bool, error) {
|
|
switch event.Type {
|
|
case watch.Deleted:
|
|
return false, errors.NewNotFound(schema.GroupResource{Resource: "serviceaccounts"}, "")
|
|
}
|
|
switch t := event.Object.(type) {
|
|
case *api.ServiceAccount:
|
|
return len(t.Secrets) > 0, nil
|
|
}
|
|
return false, nil
|
|
}
|