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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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"k8s.io/api/core/v1"
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extensions "k8s.io/api/extensions/v1beta1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/kubernetes/scheme"
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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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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, _ := scheme.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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