79 lines
2.5 KiB
Go
79 lines
2.5 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 daemonset
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import (
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"fmt"
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"math/rand"
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"k8s.io/autoscaler/cluster-autoscaler/simulator/clustersnapshot"
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"k8s.io/autoscaler/cluster-autoscaler/simulator/predicatechecker"
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appsv1 "k8s.io/api/apps/v1"
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apiv1 "k8s.io/api/core/v1"
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"k8s.io/kubernetes/pkg/controller/daemon"
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schedulerframework "k8s.io/kubernetes/pkg/scheduler/framework"
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)
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const (
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// EnableDsEvictionKey is the name of annotation controlling whether a
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// certain DaemonSet pod should be evicted.
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EnableDsEvictionKey = "cluster-autoscaler.kubernetes.io/enable-ds-eviction"
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)
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// GetDaemonSetPodsForNode returns daemonset nodes for the given pod.
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func GetDaemonSetPodsForNode(nodeInfo *schedulerframework.NodeInfo, daemonsets []*appsv1.DaemonSet, predicateChecker predicatechecker.PredicateChecker) ([]*apiv1.Pod, error) {
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result := make([]*apiv1.Pod, 0)
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// here we can use empty snapshot
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clusterSnapshot := clustersnapshot.NewBasicClusterSnapshot()
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// add a node with pods - node info is created by cloud provider,
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// we don't know whether it'll have pods or not.
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var pods []*apiv1.Pod
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for _, podInfo := range nodeInfo.Pods {
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pods = append(pods, podInfo.Pod)
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}
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if err := clusterSnapshot.AddNodeWithPods(nodeInfo.Node(), pods); err != nil {
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return nil, err
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}
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for _, ds := range daemonsets {
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shouldRun, _ := daemon.NodeShouldRunDaemonPod(nodeInfo.Node(), ds)
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if shouldRun {
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pod := daemon.NewPod(ds, nodeInfo.Node().Name)
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pod.Name = fmt.Sprintf("%s-pod-%d", ds.Name, rand.Int63())
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result = append(result, pod)
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}
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}
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return result, nil
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}
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// PodsToEvict returns a list of DaemonSet pods that should be evicted during scale down.
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func PodsToEvict(pods []*apiv1.Pod, evictByDefault bool) (evictable []*apiv1.Pod) {
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for _, pod := range pods {
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if a, ok := pod.Annotations[EnableDsEvictionKey]; ok {
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if a == "true" {
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evictable = append(evictable, pod)
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}
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} else if evictByDefault {
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evictable = append(evictable, pod)
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}
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}
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return
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}
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