566 lines
17 KiB
Go
566 lines
17 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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"reflect"
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"strings"
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"testing"
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"k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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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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utilpointer "k8s.io/utils/pointer"
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)
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func onePVCPod(filterName string) *v1.Pod {
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return &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: "some" + filterName + "Vol",
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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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}
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func splitPVCPod(filterName string) *v1.Pod {
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return &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: "someNon" + filterName + "Vol",
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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: "some" + filterName + "Vol",
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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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}
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func TestEBSLimits(t *testing.T) {
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oneVolPod := &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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AWSElasticBlockStore: &v1.AWSElasticBlockStoreVolumeSource{VolumeID: "ovp"},
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},
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},
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},
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},
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}
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twoVolPod := &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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AWSElasticBlockStore: &v1.AWSElasticBlockStoreVolumeSource{VolumeID: "tvp1"},
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},
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},
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{
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VolumeSource: v1.VolumeSource{
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AWSElasticBlockStore: &v1.AWSElasticBlockStoreVolumeSource{VolumeID: "tvp2"},
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},
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},
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},
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},
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}
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unboundPVCwithInvalidSCPod := &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: "unboundPVCwithInvalidSCPod",
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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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unboundPVCwithDefaultSCPod := &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: "unboundPVCwithDefaultSCPod",
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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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splitVolsPod := &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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HostPath: &v1.HostPathVolumeSource{},
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},
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},
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{
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VolumeSource: v1.VolumeSource{
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AWSElasticBlockStore: &v1.AWSElasticBlockStoreVolumeSource{VolumeID: "svp"},
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},
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},
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},
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},
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}
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nonApplicablePod := &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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HostPath: &v1.HostPathVolumeSource{},
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},
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},
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},
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},
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}
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deletedPVCPod := &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: "deletedPVC",
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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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twoDeletedPVCPod := &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: "deletedPVC",
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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: "anotherDeletedPVC",
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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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deletedPVPod := &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: "pvcWithDeletedPV",
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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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// deletedPVPod2 is a different pod than deletedPVPod but using the same PVC
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deletedPVPod2 := &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: "pvcWithDeletedPV",
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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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// anotherDeletedPVPod is a different pod than deletedPVPod and uses another PVC
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anotherDeletedPVPod := &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: "anotherPVCWithDeletedPV",
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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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emptyPod := &v1.Pod{
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Spec: v1.PodSpec{},
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}
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unboundPVCPod := &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: "unboundPVC",
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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 unboundPVCPod, 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: "unboundPVC",
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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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// pod with unbound PVC that's different to unboundPVC
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anotherUnboundPVCPod := &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: "anotherUnboundPVC",
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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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driverName string
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maxVols int
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test string
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wantStatus *framework.Status
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}{
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{
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newPod: oneVolPod,
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existingPods: []*v1.Pod{twoVolPod, oneVolPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 4,
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test: "fits when node capacity >= new pod's EBS volumes",
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},
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{
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newPod: twoVolPod,
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existingPods: []*v1.Pod{oneVolPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 2,
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test: "doesn't fit when node capacity < new pod's EBS 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: splitVolsPod,
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existingPods: []*v1.Pod{twoVolPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 3,
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test: "new pod's count ignores non-EBS volumes",
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},
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{
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newPod: twoVolPod,
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existingPods: []*v1.Pod{splitVolsPod, nonApplicablePod, emptyPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 3,
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test: "existing pods' counts ignore non-EBS volumes",
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},
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{
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newPod: onePVCPod(predicates.EBSVolumeFilterType),
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existingPods: []*v1.Pod{splitVolsPod, nonApplicablePod, emptyPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 3,
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test: "new pod's count considers PVCs backed by EBS volumes",
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},
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{
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newPod: splitPVCPod(predicates.EBSVolumeFilterType),
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existingPods: []*v1.Pod{splitVolsPod, oneVolPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 3,
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test: "new pod's count ignores PVCs not backed by EBS volumes",
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},
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{
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newPod: twoVolPod,
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existingPods: []*v1.Pod{oneVolPod, onePVCPod(predicates.EBSVolumeFilterType)},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 3,
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test: "existing pods' counts considers PVCs backed by EBS 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: twoVolPod,
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existingPods: []*v1.Pod{oneVolPod, twoVolPod, onePVCPod(predicates.EBSVolumeFilterType)},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 4,
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test: "already-mounted EBS volumes are always ok to allow",
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},
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{
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newPod: splitVolsPod,
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existingPods: []*v1.Pod{oneVolPod, oneVolPod, onePVCPod(predicates.EBSVolumeFilterType)},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 3,
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test: "the same EBS volumes are not counted multiple times",
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},
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{
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newPod: onePVCPod(predicates.EBSVolumeFilterType),
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existingPods: []*v1.Pod{oneVolPod, deletedPVCPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 1,
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test: "missing PVC is not counted towards the PV limit",
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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: onePVCPod(predicates.EBSVolumeFilterType),
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existingPods: []*v1.Pod{oneVolPod, deletedPVCPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 2,
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test: "missing PVC is not counted towards the PV limit",
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},
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{
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newPod: onePVCPod(predicates.EBSVolumeFilterType),
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existingPods: []*v1.Pod{oneVolPod, twoDeletedPVCPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 2,
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test: "two missing PVCs are not counted towards the PV limit twice",
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},
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{
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newPod: unboundPVCwithInvalidSCPod,
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existingPods: []*v1.Pod{oneVolPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 1,
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test: "unbound PVC with invalid SC is not counted towards the PV limit",
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},
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{
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newPod: unboundPVCwithDefaultSCPod,
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existingPods: []*v1.Pod{oneVolPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 1,
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test: "unbound PVC from different provisioner is not counted towards the PV limit",
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},
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{
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newPod: onePVCPod(predicates.EBSVolumeFilterType),
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existingPods: []*v1.Pod{oneVolPod, deletedPVPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 2,
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test: "pod with missing PV is counted towards the PV limit",
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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: onePVCPod(predicates.EBSVolumeFilterType),
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existingPods: []*v1.Pod{oneVolPod, deletedPVPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 3,
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test: "pod with missing PV is counted towards the PV limit",
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},
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{
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newPod: deletedPVPod2,
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existingPods: []*v1.Pod{oneVolPod, deletedPVPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 2,
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test: "two pods missing the same PV are counted towards the PV limit only once",
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},
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{
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newPod: anotherDeletedPVPod,
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existingPods: []*v1.Pod{oneVolPod, deletedPVPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
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maxVols: 2,
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test: "two pods missing different PVs are counted towards the PV limit twice",
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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: onePVCPod(predicates.EBSVolumeFilterType),
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existingPods: []*v1.Pod{oneVolPod, unboundPVCPod},
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filterName: predicates.EBSVolumeFilterType,
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driverName: csilibplugins.AWSEBSInTreePluginName,
|
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maxVols: 2,
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test: "pod with unbound PVC is counted towards the PV limit",
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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: onePVCPod(predicates.EBSVolumeFilterType),
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existingPods: []*v1.Pod{oneVolPod, unboundPVCPod},
|
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filterName: predicates.EBSVolumeFilterType,
|
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driverName: csilibplugins.AWSEBSInTreePluginName,
|
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maxVols: 3,
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test: "pod with unbound PVC is counted towards the PV limit",
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},
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{
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newPod: unboundPVCPod2,
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existingPods: []*v1.Pod{oneVolPod, unboundPVCPod},
|
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filterName: predicates.EBSVolumeFilterType,
|
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driverName: csilibplugins.AWSEBSInTreePluginName,
|
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maxVols: 2,
|
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test: "the same unbound PVC in multiple pods is counted towards the PV limit only once",
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},
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{
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newPod: anotherUnboundPVCPod,
|
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existingPods: []*v1.Pod{oneVolPod, unboundPVCPod},
|
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filterName: predicates.EBSVolumeFilterType,
|
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driverName: csilibplugins.AWSEBSInTreePluginName,
|
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maxVols: 2,
|
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test: "two different unbound PVCs are counted towards the PV limit as two 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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|
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defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.AttachVolumeLimit, true)()
|
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|
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for _, test := range tests {
|
|
t.Run(test.test, func(t *testing.T) {
|
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node, csiNode := getNodeWithPodAndVolumeLimits("node", test.existingPods, int64(test.maxVols), test.filterName)
|
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p := &EBSLimits{
|
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predicate: predicates.NewMaxPDVolumeCountPredicate(test.filterName, getFakeCSINodeInfo(csiNode), getFakeCSIStorageClassInfo(test.filterName, test.driverName), getFakePVInfo(test.filterName), getFakePVCInfo(test.filterName)),
|
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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)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func getFakePVCInfo(filterName string) predicates.FakePersistentVolumeClaimInfo {
|
|
return predicates.FakePersistentVolumeClaimInfo{
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "some" + filterName + "Vol"},
|
|
Spec: v1.PersistentVolumeClaimSpec{
|
|
VolumeName: "some" + filterName + "Vol",
|
|
StorageClassName: &filterName,
|
|
},
|
|
},
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "someNon" + filterName + "Vol"},
|
|
Spec: v1.PersistentVolumeClaimSpec{
|
|
VolumeName: "someNon" + filterName + "Vol",
|
|
StorageClassName: &filterName,
|
|
},
|
|
},
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "pvcWithDeletedPV"},
|
|
Spec: v1.PersistentVolumeClaimSpec{
|
|
VolumeName: "pvcWithDeletedPV",
|
|
StorageClassName: &filterName,
|
|
},
|
|
},
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "anotherPVCWithDeletedPV"},
|
|
Spec: v1.PersistentVolumeClaimSpec{
|
|
VolumeName: "anotherPVCWithDeletedPV",
|
|
StorageClassName: &filterName,
|
|
},
|
|
},
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "unboundPVC"},
|
|
Spec: v1.PersistentVolumeClaimSpec{
|
|
VolumeName: "",
|
|
StorageClassName: &filterName,
|
|
},
|
|
},
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "anotherUnboundPVC"},
|
|
Spec: v1.PersistentVolumeClaimSpec{
|
|
VolumeName: "",
|
|
StorageClassName: &filterName,
|
|
},
|
|
},
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "unboundPVCwithDefaultSCPod"},
|
|
Spec: v1.PersistentVolumeClaimSpec{
|
|
VolumeName: "",
|
|
StorageClassName: utilpointer.StringPtr("standard-sc"),
|
|
},
|
|
},
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "unboundPVCwithInvalidSCPod"},
|
|
Spec: v1.PersistentVolumeClaimSpec{
|
|
VolumeName: "",
|
|
StorageClassName: utilpointer.StringPtr("invalid-sc"),
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
func getFakePVInfo(filterName string) predicates.FakePersistentVolumeInfo {
|
|
return predicates.FakePersistentVolumeInfo{
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "some" + filterName + "Vol"},
|
|
Spec: v1.PersistentVolumeSpec{
|
|
PersistentVolumeSource: v1.PersistentVolumeSource{
|
|
AWSElasticBlockStore: &v1.AWSElasticBlockStoreVolumeSource{VolumeID: strings.ToLower(filterName) + "Vol"},
|
|
},
|
|
},
|
|
},
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "someNon" + filterName + "Vol"},
|
|
Spec: v1.PersistentVolumeSpec{
|
|
PersistentVolumeSource: v1.PersistentVolumeSource{},
|
|
},
|
|
},
|
|
}
|
|
}
|