mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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80 lines
2.8 KiB
Go
80 lines
2.8 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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"fmt"
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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/v1"
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extensions "k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
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"k8s.io/kubernetes/pkg/client/cache"
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unversionedextensions "k8s.io/kubernetes/pkg/client/clientset_generated/clientset/typed/extensions/v1beta1"
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"k8s.io/kubernetes/pkg/client/retry"
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errorsutil "k8s.io/kubernetes/pkg/util/errors"
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labelsutil "k8s.io/kubernetes/pkg/util/labels"
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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 updateRSFunc func(rs *extensions.ReplicaSet) error
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// UpdateRSWithRetries updates a RS with given applyUpdate function. Note that RS not found error is ignored.
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// The returned bool value can be used to tell if the RS is actually updated.
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func UpdateRSWithRetries(rsClient unversionedextensions.ReplicaSetInterface, rsLister *cache.StoreToReplicaSetLister, namespace, name string, applyUpdate updateRSFunc) (*extensions.ReplicaSet, error) {
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var rs *extensions.ReplicaSet
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retryErr := retry.RetryOnConflict(retry.DefaultBackoff, func() error {
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var err error
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rs, err = rsLister.ReplicaSets(namespace).Get(name)
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if err != nil {
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return err
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}
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obj, deepCopyErr := api.Scheme.DeepCopy(rs)
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if deepCopyErr != nil {
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return deepCopyErr
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}
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rs = obj.(*extensions.ReplicaSet)
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// Apply the update, then attempt to push it to the apiserver.
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if applyErr := applyUpdate(rs); applyErr != nil {
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return applyErr
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}
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rs, err = rsClient.Update(rs)
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return err
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})
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// Ignore the precondition violated error, but the RS isn't updated.
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if retryErr == errorsutil.ErrPreconditionViolated {
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glog.V(4).Infof("Replica set %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 rs, retryErr
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}
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// GetReplicaSetHash returns the pod template hash of a ReplicaSet's pod template space
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func GetReplicaSetHash(rs *extensions.ReplicaSet) string {
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meta := rs.Spec.Template.ObjectMeta
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meta.Labels = labelsutil.CloneAndRemoveLabel(meta.Labels, extensions.DefaultDeploymentUniqueLabelKey)
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return fmt.Sprintf("%d", GetPodTemplateSpecHash(v1.PodTemplateSpec{
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ObjectMeta: meta,
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Spec: rs.Spec.Template.Spec,
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}))
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}
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