92 lines
3.0 KiB
Go
92 lines
3.0 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 simulator
|
|
|
|
import (
|
|
"time"
|
|
|
|
apiv1 "k8s.io/api/core/v1"
|
|
policyv1 "k8s.io/api/policy/v1beta1"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/apimachinery/pkg/fields"
|
|
"k8s.io/autoscaler/cluster-autoscaler/utils/drain"
|
|
"k8s.io/autoscaler/cluster-autoscaler/utils/errors"
|
|
kube_client "k8s.io/client-go/kubernetes"
|
|
"k8s.io/kubernetes/plugin/pkg/scheduler/schedulercache"
|
|
)
|
|
|
|
// GetRequiredPodsForNode returns a list od pods that would appear on the node if the
|
|
// node was just created (like daemonset and manifest-run pods). It reuses kubectl
|
|
// drain command to get the list.
|
|
func GetRequiredPodsForNode(nodename string, client kube_client.Interface) ([]*apiv1.Pod, errors.AutoscalerError) {
|
|
|
|
// TODO: we should change this to use informer
|
|
podListResult, err := client.CoreV1().Pods(apiv1.NamespaceAll).List(
|
|
metav1.ListOptions{FieldSelector: fields.SelectorFromSet(fields.Set{"spec.nodeName": nodename}).String()})
|
|
if err != nil {
|
|
return []*apiv1.Pod{}, errors.ToAutoscalerError(errors.ApiCallError, err)
|
|
}
|
|
allPods := make([]*apiv1.Pod, 0)
|
|
for i := range podListResult.Items {
|
|
allPods = append(allPods, &podListResult.Items[i])
|
|
}
|
|
|
|
podsToRemoveList, err := drain.GetPodsForDeletionOnNodeDrain(
|
|
allPods,
|
|
[]*policyv1.PodDisruptionBudget{}, // PDBs are irrelevant when considering new node.
|
|
true, // Force all removals.
|
|
false,
|
|
false,
|
|
false, // Setting this to true requires client to be not-null.
|
|
nil,
|
|
0,
|
|
time.Now())
|
|
if err != nil {
|
|
return []*apiv1.Pod{}, errors.ToAutoscalerError(errors.InternalError, err)
|
|
}
|
|
|
|
podsToRemoveMap := make(map[string]struct{})
|
|
for _, pod := range podsToRemoveList {
|
|
podsToRemoveMap[pod.SelfLink] = struct{}{}
|
|
}
|
|
|
|
podsOnNewNode := make([]*apiv1.Pod, 0)
|
|
for _, pod := range allPods {
|
|
if pod.DeletionTimestamp != nil {
|
|
continue
|
|
}
|
|
|
|
if _, found := podsToRemoveMap[pod.SelfLink]; !found {
|
|
podsOnNewNode = append(podsOnNewNode, pod)
|
|
}
|
|
}
|
|
return podsOnNewNode, nil
|
|
}
|
|
|
|
// BuildNodeInfoForNode build a NodeInfo structure for the given node as if the node was just created.
|
|
func BuildNodeInfoForNode(node *apiv1.Node, client kube_client.Interface) (*schedulercache.NodeInfo, errors.AutoscalerError) {
|
|
requiredPods, err := GetRequiredPodsForNode(node.Name, client)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
result := schedulercache.NewNodeInfo(requiredPods...)
|
|
if err := result.SetNode(node); err != nil {
|
|
return nil, errors.ToAutoscalerError(errors.InternalError, err)
|
|
}
|
|
return result, nil
|
|
}
|