639 lines
20 KiB
Go
639 lines
20 KiB
Go
/*
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Copyright 2019 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 nodevolumelimits
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import (
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"context"
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"fmt"
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"reflect"
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"strings"
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"testing"
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v1 "k8s.io/api/core/v1"
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"k8s.io/api/storage/v1beta1"
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storagev1beta1 "k8s.io/api/storage/v1beta1"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/sets"
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utilfeature "k8s.io/apiserver/pkg/util/feature"
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featuregatetesting "k8s.io/component-base/featuregate/testing"
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csilibplugins "k8s.io/csi-translation-lib/plugins"
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"k8s.io/kubernetes/pkg/features"
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"k8s.io/kubernetes/pkg/scheduler/algorithm/predicates"
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framework "k8s.io/kubernetes/pkg/scheduler/framework/v1alpha1"
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fakelisters "k8s.io/kubernetes/pkg/scheduler/listers/fake"
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schedulernodeinfo "k8s.io/kubernetes/pkg/scheduler/nodeinfo"
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volumeutil "k8s.io/kubernetes/pkg/volume/util"
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utilpointer "k8s.io/utils/pointer"
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)
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const (
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ebsCSIDriverName = csilibplugins.AWSEBSDriverName
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gceCSIDriverName = csilibplugins.GCEPDDriverName
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hostpathInTreePluginName = "kubernetes.io/hostpath"
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)
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// getVolumeLimitKey returns a ResourceName by filter type
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func getVolumeLimitKey(filterType string) v1.ResourceName {
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switch filterType {
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case predicates.EBSVolumeFilterType:
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return v1.ResourceName(volumeutil.EBSVolumeLimitKey)
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case predicates.GCEPDVolumeFilterType:
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return v1.ResourceName(volumeutil.GCEVolumeLimitKey)
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case predicates.AzureDiskVolumeFilterType:
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return v1.ResourceName(volumeutil.AzureVolumeLimitKey)
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case predicates.CinderVolumeFilterType:
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return v1.ResourceName(volumeutil.CinderVolumeLimitKey)
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default:
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return v1.ResourceName(volumeutil.GetCSIAttachLimitKey(filterType))
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}
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}
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func TestCSILimits(t *testing.T) {
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runningPod := &v1.Pod{
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Spec: v1.PodSpec{
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Volumes: []v1.Volume{
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{
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: "csi-ebs.csi.aws.com-3",
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},
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},
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},
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},
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},
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}
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pendingVolumePod := &v1.Pod{
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Spec: v1.PodSpec{
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Volumes: []v1.Volume{
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{
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: "csi-4",
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},
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},
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},
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},
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},
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}
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// Different pod than pendingVolumePod, but using the same unbound PVC
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unboundPVCPod2 := &v1.Pod{
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Spec: v1.PodSpec{
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Volumes: []v1.Volume{
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{
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: "csi-4",
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},
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},
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},
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},
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},
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}
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missingPVPod := &v1.Pod{
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Spec: v1.PodSpec{
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Volumes: []v1.Volume{
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{
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: "csi-6",
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},
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},
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},
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},
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},
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}
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noSCPVCPod := &v1.Pod{
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Spec: v1.PodSpec{
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Volumes: []v1.Volume{
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{
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: "csi-5",
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},
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},
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},
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},
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},
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}
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gceTwoVolPod := &v1.Pod{
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Spec: v1.PodSpec{
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Volumes: []v1.Volume{
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{
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: "csi-pd.csi.storage.gke.io-1",
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},
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},
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},
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{
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: "csi-pd.csi.storage.gke.io-2",
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},
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},
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},
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},
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},
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}
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// In-tree volumes
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inTreeOneVolPod := &v1.Pod{
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Spec: v1.PodSpec{
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Volumes: []v1.Volume{
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{
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: "csi-kubernetes.io/aws-ebs-0",
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},
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},
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},
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},
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},
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}
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inTreeTwoVolPod := &v1.Pod{
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Spec: v1.PodSpec{
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Volumes: []v1.Volume{
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{
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: "csi-kubernetes.io/aws-ebs-1",
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},
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},
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},
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{
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: "csi-kubernetes.io/aws-ebs-2",
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},
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},
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},
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},
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},
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}
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// pods with matching csi driver names
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csiEBSOneVolPod := &v1.Pod{
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Spec: v1.PodSpec{
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Volumes: []v1.Volume{
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{
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: "csi-ebs.csi.aws.com-0",
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},
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},
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},
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},
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},
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}
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csiEBSTwoVolPod := &v1.Pod{
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Spec: v1.PodSpec{
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Volumes: []v1.Volume{
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{
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: "csi-ebs.csi.aws.com-1",
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},
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},
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},
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{
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: "csi-ebs.csi.aws.com-2",
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},
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},
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},
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},
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},
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}
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inTreeNonMigratableOneVolPod := &v1.Pod{
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Spec: v1.PodSpec{
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Volumes: []v1.Volume{
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{
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: "csi-kubernetes.io/hostpath-0",
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},
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},
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},
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},
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},
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}
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tests := []struct {
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newPod *v1.Pod
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existingPods []*v1.Pod
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filterName string
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maxVols int
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driverNames []string
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test string
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migrationEnabled bool
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limitSource string
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expectedFailureReason *predicates.PredicateFailureError
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wantStatus *framework.Status
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}{
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{
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newPod: csiEBSOneVolPod,
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existingPods: []*v1.Pod{runningPod, csiEBSTwoVolPod},
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filterName: "csi",
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maxVols: 4,
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driverNames: []string{ebsCSIDriverName},
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test: "fits when node volume limit >= new pods CSI volume",
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limitSource: "node",
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},
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{
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newPod: csiEBSOneVolPod,
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existingPods: []*v1.Pod{runningPod, csiEBSTwoVolPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{ebsCSIDriverName},
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test: "doesn't when node volume limit <= pods CSI volume",
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limitSource: "node",
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wantStatus: framework.NewStatus(framework.Unschedulable, predicates.ErrMaxVolumeCountExceeded.GetReason()),
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},
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{
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newPod: csiEBSOneVolPod,
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existingPods: []*v1.Pod{runningPod, csiEBSTwoVolPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{ebsCSIDriverName},
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test: "should when driver does not support volume limits",
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limitSource: "csinode-with-no-limit",
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},
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// should count pending PVCs
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{
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newPod: csiEBSOneVolPod,
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existingPods: []*v1.Pod{pendingVolumePod, csiEBSTwoVolPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{ebsCSIDriverName},
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test: "count pending PVCs towards volume limit <= pods CSI volume",
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limitSource: "node",
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wantStatus: framework.NewStatus(framework.Unschedulable, predicates.ErrMaxVolumeCountExceeded.GetReason()),
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},
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// two same pending PVCs should be counted as 1
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{
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newPod: csiEBSOneVolPod,
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existingPods: []*v1.Pod{pendingVolumePod, unboundPVCPod2, csiEBSTwoVolPod},
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filterName: "csi",
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maxVols: 4,
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driverNames: []string{ebsCSIDriverName},
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test: "count multiple pending pvcs towards volume limit >= pods CSI volume",
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limitSource: "node",
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},
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// should count PVCs with invalid PV name but valid SC
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{
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newPod: csiEBSOneVolPod,
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existingPods: []*v1.Pod{missingPVPod, csiEBSTwoVolPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{ebsCSIDriverName},
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test: "should count PVCs with invalid PV name but valid SC",
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limitSource: "node",
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wantStatus: framework.NewStatus(framework.Unschedulable, predicates.ErrMaxVolumeCountExceeded.GetReason()),
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},
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// don't count a volume which has storageclass missing
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{
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newPod: csiEBSOneVolPod,
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existingPods: []*v1.Pod{runningPod, noSCPVCPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{ebsCSIDriverName},
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test: "don't count pvcs with missing SC towards volume limit",
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limitSource: "node",
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},
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// don't count multiple volume types
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{
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newPod: csiEBSOneVolPod,
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existingPods: []*v1.Pod{gceTwoVolPod, csiEBSTwoVolPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{ebsCSIDriverName, gceCSIDriverName},
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test: "count pvcs with the same type towards volume limit",
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limitSource: "node",
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wantStatus: framework.NewStatus(framework.Unschedulable, predicates.ErrMaxVolumeCountExceeded.GetReason()),
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},
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{
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newPod: gceTwoVolPod,
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existingPods: []*v1.Pod{csiEBSTwoVolPod, runningPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{ebsCSIDriverName, gceCSIDriverName},
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test: "don't count pvcs with different type towards volume limit",
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limitSource: "node",
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},
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// Tests for in-tree volume migration
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{
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newPod: inTreeOneVolPod,
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existingPods: []*v1.Pod{inTreeTwoVolPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{csilibplugins.AWSEBSInTreePluginName, ebsCSIDriverName},
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migrationEnabled: true,
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limitSource: "csinode",
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test: "should count in-tree volumes if migration is enabled",
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wantStatus: framework.NewStatus(framework.Unschedulable, predicates.ErrMaxVolumeCountExceeded.GetReason()),
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},
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{
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newPod: pendingVolumePod,
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existingPods: []*v1.Pod{inTreeTwoVolPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{csilibplugins.AWSEBSInTreePluginName, ebsCSIDriverName},
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migrationEnabled: true,
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limitSource: "csinode",
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test: "should count unbound in-tree volumes if migration is enabled",
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wantStatus: framework.NewStatus(framework.Unschedulable, predicates.ErrMaxVolumeCountExceeded.GetReason()),
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},
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{
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newPod: inTreeOneVolPod,
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existingPods: []*v1.Pod{inTreeTwoVolPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{csilibplugins.AWSEBSInTreePluginName, ebsCSIDriverName},
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migrationEnabled: false,
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limitSource: "csinode",
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test: "should not count in-tree volume if migration is disabled",
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},
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{
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newPod: inTreeOneVolPod,
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existingPods: []*v1.Pod{inTreeTwoVolPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{csilibplugins.AWSEBSInTreePluginName, ebsCSIDriverName},
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migrationEnabled: true,
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limitSource: "csinode-with-no-limit",
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test: "should not limit pod if volume used does not report limits",
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},
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{
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newPod: inTreeOneVolPod,
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existingPods: []*v1.Pod{inTreeTwoVolPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{csilibplugins.AWSEBSInTreePluginName, ebsCSIDriverName},
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migrationEnabled: false,
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limitSource: "csinode-with-no-limit",
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test: "should not limit in-tree pod if migration is disabled",
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},
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{
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newPod: inTreeNonMigratableOneVolPod,
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existingPods: []*v1.Pod{csiEBSTwoVolPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{hostpathInTreePluginName, ebsCSIDriverName},
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migrationEnabled: true,
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limitSource: "csinode",
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test: "should not count non-migratable in-tree volumes",
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},
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// mixed volumes
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{
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newPod: inTreeOneVolPod,
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existingPods: []*v1.Pod{csiEBSTwoVolPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{csilibplugins.AWSEBSInTreePluginName, ebsCSIDriverName},
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migrationEnabled: true,
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limitSource: "csinode",
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test: "should count in-tree and csi volumes if migration is enabled (when scheduling in-tree volumes)",
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wantStatus: framework.NewStatus(framework.Unschedulable, predicates.ErrMaxVolumeCountExceeded.GetReason()),
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},
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{
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newPod: csiEBSOneVolPod,
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existingPods: []*v1.Pod{inTreeTwoVolPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{csilibplugins.AWSEBSInTreePluginName, ebsCSIDriverName},
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migrationEnabled: true,
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limitSource: "csinode",
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test: "should count in-tree and csi volumes if migration is enabled (when scheduling csi volumes)",
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wantStatus: framework.NewStatus(framework.Unschedulable, predicates.ErrMaxVolumeCountExceeded.GetReason()),
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},
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{
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newPod: csiEBSOneVolPod,
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existingPods: []*v1.Pod{csiEBSTwoVolPod, inTreeTwoVolPod},
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filterName: "csi",
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maxVols: 3,
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driverNames: []string{csilibplugins.AWSEBSInTreePluginName, ebsCSIDriverName},
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migrationEnabled: false,
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limitSource: "csinode",
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test: "should not count in-tree and count csi volumes if migration is disabled (when scheduling csi volumes)",
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},
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{
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newPod: inTreeOneVolPod,
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existingPods: []*v1.Pod{csiEBSTwoVolPod},
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filterName: "csi",
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maxVols: 2,
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driverNames: []string{csilibplugins.AWSEBSInTreePluginName, ebsCSIDriverName},
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migrationEnabled: false,
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limitSource: "csinode",
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test: "should not count in-tree and count csi volumes if migration is disabled (when scheduling in-tree volumes)",
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},
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}
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defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.AttachVolumeLimit, true)()
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// running attachable predicate tests with feature gate and limit present on nodes
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for _, test := range tests {
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t.Run(test.test, func(t *testing.T) {
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node, csiNode := getNodeWithPodAndVolumeLimits(test.limitSource, test.existingPods, int64(test.maxVols), test.driverNames...)
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if test.migrationEnabled {
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defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.CSIMigration, true)()
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defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.CSIMigrationAWS, true)()
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enableMigrationOnNode(csiNode, csilibplugins.AWSEBSInTreePluginName)
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} else {
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defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.CSIMigration, false)()
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defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.CSIMigrationAWS, false)()
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}
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p := &CSILimits{
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predicate: predicates.NewCSIMaxVolumeLimitPredicate(getFakeCSINodeLister(csiNode), getFakeCSIPVLister(test.filterName, test.driverNames...), getFakeCSIPVCLister(test.filterName, "csi-sc", test.driverNames...), getFakeCSIStorageClassLister("csi-sc", test.driverNames[0])),
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}
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gotStatus := p.Filter(context.Background(), nil, test.newPod, node)
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if !reflect.DeepEqual(gotStatus, test.wantStatus) {
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t.Errorf("status does not match: %v, want: %v", gotStatus, test.wantStatus)
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}
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})
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}
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}
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|
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func getFakeCSIPVLister(volumeName string, driverNames ...string) fakelisters.PersistentVolumeLister {
|
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pvLister := fakelisters.PersistentVolumeLister{}
|
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for _, driver := range driverNames {
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for j := 0; j < 4; j++ {
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volumeHandle := fmt.Sprintf("%s-%s-%d", volumeName, driver, j)
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pv := v1.PersistentVolume{
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ObjectMeta: metav1.ObjectMeta{Name: volumeHandle},
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|
Spec: v1.PersistentVolumeSpec{
|
|
PersistentVolumeSource: v1.PersistentVolumeSource{
|
|
CSI: &v1.CSIPersistentVolumeSource{
|
|
Driver: driver,
|
|
VolumeHandle: volumeHandle,
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
switch driver {
|
|
case csilibplugins.AWSEBSInTreePluginName:
|
|
pv.Spec.PersistentVolumeSource = v1.PersistentVolumeSource{
|
|
AWSElasticBlockStore: &v1.AWSElasticBlockStoreVolumeSource{
|
|
VolumeID: volumeHandle,
|
|
},
|
|
}
|
|
case hostpathInTreePluginName:
|
|
pv.Spec.PersistentVolumeSource = v1.PersistentVolumeSource{
|
|
HostPath: &v1.HostPathVolumeSource{
|
|
Path: "/tmp",
|
|
},
|
|
}
|
|
default:
|
|
pv.Spec.PersistentVolumeSource = v1.PersistentVolumeSource{
|
|
CSI: &v1.CSIPersistentVolumeSource{
|
|
Driver: driver,
|
|
VolumeHandle: volumeHandle,
|
|
},
|
|
}
|
|
}
|
|
pvLister = append(pvLister, pv)
|
|
}
|
|
|
|
}
|
|
return pvLister
|
|
}
|
|
|
|
func getFakeCSIPVCLister(volumeName, scName string, driverNames ...string) fakelisters.PersistentVolumeClaimLister {
|
|
pvcLister := fakelisters.PersistentVolumeClaimLister{}
|
|
for _, driver := range driverNames {
|
|
for j := 0; j < 4; j++ {
|
|
v := fmt.Sprintf("%s-%s-%d", volumeName, driver, j)
|
|
pvc := v1.PersistentVolumeClaim{
|
|
ObjectMeta: metav1.ObjectMeta{Name: v},
|
|
Spec: v1.PersistentVolumeClaimSpec{VolumeName: v},
|
|
}
|
|
pvcLister = append(pvcLister, pvc)
|
|
}
|
|
}
|
|
|
|
pvcLister = append(pvcLister, v1.PersistentVolumeClaim{
|
|
ObjectMeta: metav1.ObjectMeta{Name: volumeName + "-4"},
|
|
Spec: v1.PersistentVolumeClaimSpec{StorageClassName: &scName},
|
|
})
|
|
pvcLister = append(pvcLister, v1.PersistentVolumeClaim{
|
|
ObjectMeta: metav1.ObjectMeta{Name: volumeName + "-5"},
|
|
Spec: v1.PersistentVolumeClaimSpec{},
|
|
})
|
|
// a pvc with missing PV but available storageclass.
|
|
pvcLister = append(pvcLister, v1.PersistentVolumeClaim{
|
|
ObjectMeta: metav1.ObjectMeta{Name: volumeName + "-6"},
|
|
Spec: v1.PersistentVolumeClaimSpec{StorageClassName: &scName, VolumeName: "missing-in-action"},
|
|
})
|
|
return pvcLister
|
|
}
|
|
|
|
func enableMigrationOnNode(csiNode *storagev1beta1.CSINode, pluginName string) {
|
|
nodeInfoAnnotations := csiNode.GetAnnotations()
|
|
if nodeInfoAnnotations == nil {
|
|
nodeInfoAnnotations = map[string]string{}
|
|
}
|
|
|
|
newAnnotationSet := sets.NewString()
|
|
newAnnotationSet.Insert(pluginName)
|
|
nas := strings.Join(newAnnotationSet.List(), ",")
|
|
nodeInfoAnnotations[v1.MigratedPluginsAnnotationKey] = nas
|
|
|
|
csiNode.Annotations = nodeInfoAnnotations
|
|
}
|
|
|
|
func getFakeCSIStorageClassLister(scName, provisionerName string) fakelisters.StorageClassLister {
|
|
return fakelisters.StorageClassLister{
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{Name: scName},
|
|
Provisioner: provisionerName,
|
|
},
|
|
}
|
|
}
|
|
|
|
func getFakeCSINodeLister(csiNode *storagev1beta1.CSINode) fakelisters.CSINodeLister {
|
|
if csiNode != nil {
|
|
return fakelisters.CSINodeLister(*csiNode)
|
|
}
|
|
return fakelisters.CSINodeLister{}
|
|
}
|
|
|
|
func getNodeWithPodAndVolumeLimits(limitSource string, pods []*v1.Pod, limit int64, driverNames ...string) (*schedulernodeinfo.NodeInfo, *v1beta1.CSINode) {
|
|
nodeInfo := schedulernodeinfo.NewNodeInfo(pods...)
|
|
node := &v1.Node{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "node-for-max-pd-test-1"},
|
|
Status: v1.NodeStatus{
|
|
Allocatable: v1.ResourceList{},
|
|
},
|
|
}
|
|
var csiNode *v1beta1.CSINode
|
|
|
|
addLimitToNode := func() {
|
|
for _, driver := range driverNames {
|
|
node.Status.Allocatable[getVolumeLimitKey(driver)] = *resource.NewQuantity(limit, resource.DecimalSI)
|
|
}
|
|
}
|
|
|
|
initCSINode := func() {
|
|
csiNode = &v1beta1.CSINode{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "csi-node-for-max-pd-test-1"},
|
|
Spec: v1beta1.CSINodeSpec{
|
|
Drivers: []v1beta1.CSINodeDriver{},
|
|
},
|
|
}
|
|
}
|
|
|
|
addDriversCSINode := func(addLimits bool) {
|
|
initCSINode()
|
|
for _, driver := range driverNames {
|
|
driver := v1beta1.CSINodeDriver{
|
|
Name: driver,
|
|
NodeID: "node-for-max-pd-test-1",
|
|
}
|
|
if addLimits {
|
|
driver.Allocatable = &v1beta1.VolumeNodeResources{
|
|
Count: utilpointer.Int32Ptr(int32(limit)),
|
|
}
|
|
}
|
|
csiNode.Spec.Drivers = append(csiNode.Spec.Drivers, driver)
|
|
}
|
|
}
|
|
|
|
switch limitSource {
|
|
case "node":
|
|
addLimitToNode()
|
|
case "csinode":
|
|
addDriversCSINode(true)
|
|
case "both":
|
|
addLimitToNode()
|
|
addDriversCSINode(true)
|
|
case "csinode-with-no-limit":
|
|
addDriversCSINode(false)
|
|
case "no-csi-driver":
|
|
initCSINode()
|
|
default:
|
|
// Do nothing.
|
|
}
|
|
|
|
nodeInfo.SetNode(node)
|
|
return nodeInfo, csiNode
|
|
}
|