mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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61 lines
1.9 KiB
Go
61 lines
1.9 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 util
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import (
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"github.com/golang/glog"
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"k8s.io/api/core/v1"
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errorsutil "k8s.io/apimachinery/pkg/util/errors"
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v1core "k8s.io/client-go/kubernetes/typed/core/v1"
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corelisters "k8s.io/client-go/listers/core/v1"
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"k8s.io/client-go/util/retry"
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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 *v1.Pod) error
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// UpdatePodWithRetries updates a pod with given applyUpdate function.
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func UpdatePodWithRetries(podClient v1core.PodInterface, podLister corelisters.PodLister, namespace, name string, applyUpdate updatePodFunc) (*v1.Pod, error) {
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var pod *v1.Pod
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retryErr := retry.RetryOnConflict(retry.DefaultBackoff, func() error {
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var err error
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pod, err = podLister.Pods(namespace).Get(name)
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if err != nil {
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return err
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}
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pod = pod.DeepCopy()
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// Apply the update, then attempt to push it to the apiserver.
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if applyErr := applyUpdate(pod); applyErr != nil {
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return applyErr
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}
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pod, err = podClient.Update(pod)
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return err
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})
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// Ignore the precondition violated error, this pod is already updated
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// with the desired label.
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if retryErr == errorsutil.ErrPreconditionViolated {
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glog.V(4).Infof("Pod %s/%s precondition doesn't hold, skip updating it.", namespace, name)
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retryErr = nil
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}
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return pod, retryErr
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}
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