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
92 lines
3.6 KiB
Go
92 lines
3.6 KiB
Go
/*
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Copyright 2017 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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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/v1"
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v1helper "k8s.io/kubernetes/pkg/api/v1/helper"
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podutil "k8s.io/kubernetes/pkg/api/v1/pod"
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extensions "k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
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labelsutil "k8s.io/kubernetes/pkg/util/labels"
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"k8s.io/kubernetes/plugin/pkg/scheduler/algorithm"
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)
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// CreatePodTemplate returns copy of provided template with additional
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// label which contains templateGeneration (for backward compatibility),
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// hash of provided template and sets default daemon tolerations.
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func CreatePodTemplate(template v1.PodTemplateSpec, generation int64, hash string) v1.PodTemplateSpec {
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obj, _ := api.Scheme.DeepCopy(template)
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newTemplate := obj.(v1.PodTemplateSpec)
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// DaemonSet pods shouldn't be deleted by NodeController in case of node problems.
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// Add infinite toleration for taint notReady:NoExecute here
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// to survive taint-based eviction enforced by NodeController
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// when node turns not ready.
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v1helper.AddOrUpdateTolerationInPodSpec(&newTemplate.Spec, &v1.Toleration{
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Key: algorithm.TaintNodeNotReady,
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Operator: v1.TolerationOpExists,
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Effect: v1.TaintEffectNoExecute,
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})
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// DaemonSet pods shouldn't be deleted by NodeController in case of node problems.
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// Add infinite toleration for taint unreachable:NoExecute here
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// to survive taint-based eviction enforced by NodeController
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// when node turns unreachable.
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v1helper.AddOrUpdateTolerationInPodSpec(&newTemplate.Spec, &v1.Toleration{
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Key: algorithm.TaintNodeUnreachable,
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Operator: v1.TolerationOpExists,
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Effect: v1.TaintEffectNoExecute,
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})
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templateGenerationStr := fmt.Sprint(generation)
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newTemplate.ObjectMeta.Labels = labelsutil.CloneAndAddLabel(
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template.ObjectMeta.Labels,
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extensions.DaemonSetTemplateGenerationKey,
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templateGenerationStr,
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)
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// TODO: do we need to validate if the DaemonSet is RollingUpdate or not?
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if len(hash) > 0 {
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newTemplate.ObjectMeta.Labels[extensions.DefaultDaemonSetUniqueLabelKey] = hash
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}
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return newTemplate
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}
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// IsPodUpdate checks if pod contains label value that either matches templateGeneration or hash
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func IsPodUpdated(dsTemplateGeneration int64, pod *v1.Pod, hash string) bool {
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// Compare with hash to see if the pod is updated, need to maintain backward compatibility of templateGeneration
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templateMatches := pod.Labels[extensions.DaemonSetTemplateGenerationKey] == fmt.Sprint(dsTemplateGeneration)
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hashMatches := len(hash) > 0 && pod.Labels[extensions.DefaultDaemonSetUniqueLabelKey] == hash
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return hashMatches || templateMatches
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}
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// SplitByAvailablePods splits provided daemon set pods by availabilty
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func SplitByAvailablePods(minReadySeconds int32, pods []*v1.Pod) ([]*v1.Pod, []*v1.Pod) {
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unavailablePods := []*v1.Pod{}
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availablePods := []*v1.Pod{}
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for _, pod := range pods {
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if podutil.IsPodAvailable(pod, minReadySeconds, metav1.Now()) {
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availablePods = append(availablePods, pod)
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} else {
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unavailablePods = append(unavailablePods, pod)
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}
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}
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return availablePods, unavailablePods
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}
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