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59ca5986dd
There are many places in k8s where %+v is used to format a pointer to struct, which isn't working as expected. Fixes #26591
101 lines
3.4 KiB
Go
101 lines
3.4 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package pod
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import (
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"fmt"
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"hash/adler32"
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"time"
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"github.com/golang/glog"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/errors"
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unversionedcore "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/typed/core/unversioned"
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errorsutil "k8s.io/kubernetes/pkg/util/errors"
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hashutil "k8s.io/kubernetes/pkg/util/hash"
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"k8s.io/kubernetes/pkg/util/wait"
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)
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func GetPodTemplateSpecHash(template api.PodTemplateSpec) uint32 {
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podTemplateSpecHasher := adler32.New()
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hashutil.DeepHashObject(podTemplateSpecHasher, template)
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return podTemplateSpecHasher.Sum32()
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}
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// TODO: use client library instead when it starts to support update retries
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// see https://github.com/kubernetes/kubernetes/issues/21479
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type updatePodFunc func(pod *api.Pod) error
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// UpdatePodWithRetries updates a pod with given applyUpdate function. Note that pod not found error is ignored.
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// The returned bool value can be used to tell if the pod is actually updated.
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func UpdatePodWithRetries(podClient unversionedcore.PodInterface, pod *api.Pod, applyUpdate updatePodFunc) (*api.Pod, bool, error) {
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var err error
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var podUpdated bool
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oldPod := pod
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if err = wait.Poll(10*time.Millisecond, 1*time.Minute, func() (bool, error) {
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pod, err = podClient.Get(oldPod.Name)
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if err != nil {
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return false, err
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}
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// Apply the update, then attempt to push it to the apiserver.
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if err = applyUpdate(pod); err != nil {
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return false, err
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}
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if pod, err = podClient.Update(pod); err == nil {
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// Update successful.
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return true, nil
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}
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// TODO: don't retry on perm-failed errors and handle them gracefully
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// Update could have failed due to conflict error. Try again.
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return false, nil
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}); err == nil {
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// When there's no error, we've updated this pod.
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podUpdated = true
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}
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// Handle returned error from wait poll
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if err == wait.ErrWaitTimeout {
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err = fmt.Errorf("timed out trying to update pod: %#v", oldPod)
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}
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// Ignore the pod not found error, but the pod isn't updated.
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if errors.IsNotFound(err) {
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glog.V(4).Infof("%s %s/%s is not found, skip updating it.", oldPod.Kind, oldPod.Namespace, oldPod.Name)
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err = nil
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}
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// Ignore the precondition violated error, but the pod isn't updated.
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if err == errorsutil.ErrPreconditionViolated {
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glog.V(4).Infof("%s %s/%s precondition doesn't hold, skip updating it.", oldPod.Kind, oldPod.Namespace, oldPod.Name)
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err = nil
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}
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// If the error is non-nil the returned pod cannot be trusted; if podUpdated is false, the pod isn't updated;
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// if the error is nil and podUpdated is true, the returned pod contains the applied update.
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return pod, podUpdated, err
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}
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// Filter uses the input function f to filter the given pod list, and return the filtered pods
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func Filter(podList *api.PodList, f func(api.Pod) bool) []api.Pod {
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pods := make([]api.Pod, 0)
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for _, p := range podList.Items {
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if f(p) {
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pods = append(pods, p)
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}
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}
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return pods
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}
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