d02f40a5e7
1. Create controllerrevisions (history) and label pods with template hash for both RollingUpdate and OnDelete update strategy 2. Clean up old, non-live history based on revisionHistoryLimit 3. Remove duplicate controllerrevisions (the ones with the same template) and relabel their pods 4. Update RBAC to allow DaemonSet controller to manage controllerrevisions 5. In DaemonSet controller unit tests, create new pods with hash labels
82 lines
2.9 KiB
Go
82 lines
2.9 KiB
Go
/*
|
|
Copyright 2016 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 util
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/golang/glog"
|
|
|
|
errorsutil "k8s.io/apimachinery/pkg/util/errors"
|
|
"k8s.io/kubernetes/pkg/api"
|
|
"k8s.io/kubernetes/pkg/api/v1"
|
|
extensions "k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
|
|
unversionedextensions "k8s.io/kubernetes/pkg/client/clientset_generated/clientset/typed/extensions/v1beta1"
|
|
extensionslisters "k8s.io/kubernetes/pkg/client/listers/extensions/v1beta1"
|
|
"k8s.io/kubernetes/pkg/client/retry"
|
|
"k8s.io/kubernetes/pkg/controller"
|
|
labelsutil "k8s.io/kubernetes/pkg/util/labels"
|
|
)
|
|
|
|
// TODO: use client library instead when it starts to support update retries
|
|
// see https://github.com/kubernetes/kubernetes/issues/21479
|
|
type updateRSFunc func(rs *extensions.ReplicaSet) error
|
|
|
|
// UpdateRSWithRetries updates a RS with given applyUpdate function. Note that RS not found error is ignored.
|
|
// The returned bool value can be used to tell if the RS is actually updated.
|
|
func UpdateRSWithRetries(rsClient unversionedextensions.ReplicaSetInterface, rsLister extensionslisters.ReplicaSetLister, namespace, name string, applyUpdate updateRSFunc) (*extensions.ReplicaSet, error) {
|
|
var rs *extensions.ReplicaSet
|
|
|
|
retryErr := retry.RetryOnConflict(retry.DefaultBackoff, func() error {
|
|
var err error
|
|
rs, err = rsLister.ReplicaSets(namespace).Get(name)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
obj, deepCopyErr := api.Scheme.DeepCopy(rs)
|
|
if deepCopyErr != nil {
|
|
return deepCopyErr
|
|
}
|
|
rs = obj.(*extensions.ReplicaSet)
|
|
// Apply the update, then attempt to push it to the apiserver.
|
|
if applyErr := applyUpdate(rs); applyErr != nil {
|
|
return applyErr
|
|
}
|
|
rs, err = rsClient.Update(rs)
|
|
return err
|
|
})
|
|
|
|
// Ignore the precondition violated error, but the RS isn't updated.
|
|
if retryErr == errorsutil.ErrPreconditionViolated {
|
|
glog.V(4).Infof("Replica set %s/%s precondition doesn't hold, skip updating it.", namespace, name)
|
|
retryErr = nil
|
|
}
|
|
|
|
return rs, retryErr
|
|
}
|
|
|
|
// GetReplicaSetHash returns the pod template hash of a ReplicaSet's pod template space
|
|
func GetReplicaSetHash(rs *extensions.ReplicaSet, uniquifier *int64) (string, error) {
|
|
template, err := api.Scheme.DeepCopy(rs.Spec.Template)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
rsTemplate := template.(v1.PodTemplateSpec)
|
|
rsTemplate.Labels = labelsutil.CloneAndRemoveLabel(rsTemplate.Labels, extensions.DefaultDeploymentUniqueLabelKey)
|
|
return fmt.Sprintf("%d", controller.ComputeHash(&rsTemplate, uniquifier)), nil
|
|
}
|