mirror of https://github.com/k3s-io/k3s
562 lines
17 KiB
Go
562 lines
17 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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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 persistentvolume
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import (
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"testing"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/resource"
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)
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func TestMatchVolume(t *testing.T) {
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volList := NewPersistentVolumeOrderedIndex()
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for _, pv := range createTestVolumes() {
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volList.Add(pv)
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}
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scenarios := map[string]struct {
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expectedMatch string
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claim *api.PersistentVolumeClaim
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}{
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"successful-match-gce-10": {
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expectedMatch: "gce-pd-10",
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claim: &api.PersistentVolumeClaim{
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ObjectMeta: api.ObjectMeta{
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Name: "claim01",
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Namespace: "myns",
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},
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Spec: api.PersistentVolumeClaimSpec{
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AccessModes: []api.PersistentVolumeAccessMode{api.ReadOnlyMany, api.ReadWriteOnce},
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Resources: api.ResourceRequirements{
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Requests: api.ResourceList{
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api.ResourceName(api.ResourceStorage): resource.MustParse("8G"),
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},
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},
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},
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},
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},
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"successful-match-nfs-5": {
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expectedMatch: "nfs-5",
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claim: &api.PersistentVolumeClaim{
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ObjectMeta: api.ObjectMeta{
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Name: "claim01",
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Namespace: "myns",
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},
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Spec: api.PersistentVolumeClaimSpec{
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AccessModes: []api.PersistentVolumeAccessMode{api.ReadOnlyMany, api.ReadWriteOnce, api.ReadWriteMany},
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Resources: api.ResourceRequirements{
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Requests: api.ResourceList{
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api.ResourceName(api.ResourceStorage): resource.MustParse("5G"),
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},
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},
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},
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},
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},
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"successful-skip-1g-bound-volume": {
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expectedMatch: "gce-pd-5",
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claim: &api.PersistentVolumeClaim{
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ObjectMeta: api.ObjectMeta{
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Name: "claim01",
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Namespace: "myns",
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},
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Spec: api.PersistentVolumeClaimSpec{
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AccessModes: []api.PersistentVolumeAccessMode{api.ReadOnlyMany, api.ReadWriteOnce},
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Resources: api.ResourceRequirements{
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Requests: api.ResourceList{
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api.ResourceName(api.ResourceStorage): resource.MustParse("1G"),
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},
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},
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},
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},
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},
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"successful-no-match": {
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expectedMatch: "",
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claim: &api.PersistentVolumeClaim{
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ObjectMeta: api.ObjectMeta{
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Name: "claim01",
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Namespace: "myns",
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},
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Spec: api.PersistentVolumeClaimSpec{
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AccessModes: []api.PersistentVolumeAccessMode{api.ReadOnlyMany, api.ReadWriteOnce},
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Resources: api.ResourceRequirements{
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Requests: api.ResourceList{
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api.ResourceName(api.ResourceStorage): resource.MustParse("999G"),
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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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for name, scenario := range scenarios {
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volume, err := volList.FindBestMatchForClaim(scenario.claim)
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if err != nil {
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t.Errorf("Unexpected error matching volume by claim: %v", err)
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}
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if scenario.expectedMatch != "" && volume == nil {
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t.Errorf("Expected match but received nil volume for scenario: %s", name)
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}
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if scenario.expectedMatch != "" && volume != nil && string(volume.UID) != scenario.expectedMatch {
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t.Errorf("Expected %s but got volume %s in scenario %s", scenario.expectedMatch, volume.UID, name)
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}
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if scenario.expectedMatch == "" && volume != nil {
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t.Errorf("Unexpected match for scenario: %s", name)
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}
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}
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}
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func TestMatchingWithBoundVolumes(t *testing.T) {
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volumeIndex := NewPersistentVolumeOrderedIndex()
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// two similar volumes, one is bound
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pv1 := &api.PersistentVolume{
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ObjectMeta: api.ObjectMeta{
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UID: "gce-pd-1",
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Name: "gce001",
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},
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Spec: api.PersistentVolumeSpec{
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Capacity: api.ResourceList{
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api.ResourceName(api.ResourceStorage): resource.MustParse("1G"),
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},
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PersistentVolumeSource: api.PersistentVolumeSource{
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GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{},
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},
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AccessModes: []api.PersistentVolumeAccessMode{api.ReadWriteOnce, api.ReadOnlyMany},
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// this one we're pretending is already bound
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ClaimRef: &api.ObjectReference{UID: "abc123"},
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},
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}
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pv2 := &api.PersistentVolume{
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ObjectMeta: api.ObjectMeta{
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UID: "gce-pd-2",
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Name: "gce002",
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},
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Spec: api.PersistentVolumeSpec{
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Capacity: api.ResourceList{
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api.ResourceName(api.ResourceStorage): resource.MustParse("1G"),
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},
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PersistentVolumeSource: api.PersistentVolumeSource{
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GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{},
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},
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AccessModes: []api.PersistentVolumeAccessMode{api.ReadWriteOnce, api.ReadOnlyMany},
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},
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}
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volumeIndex.Add(pv1)
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volumeIndex.Add(pv2)
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claim := &api.PersistentVolumeClaim{
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ObjectMeta: api.ObjectMeta{
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Name: "claim01",
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Namespace: "myns",
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},
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Spec: api.PersistentVolumeClaimSpec{
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AccessModes: []api.PersistentVolumeAccessMode{api.ReadOnlyMany, api.ReadWriteOnce},
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Resources: api.ResourceRequirements{
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Requests: api.ResourceList{
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api.ResourceName(api.ResourceStorage): resource.MustParse("1G"),
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},
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},
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},
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}
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volume, err := volumeIndex.FindBestMatchForClaim(claim)
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if err != nil {
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t.Fatalf("Unexpected error matching volume by claim: %v", err)
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}
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if volume == nil {
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t.Fatalf("Unexpected nil volume. Expected %s", pv2.Name)
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}
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if pv2.Name != volume.Name {
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t.Errorf("Expected %s but got volume %s instead", pv2.Name, volume.Name)
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}
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}
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func TestSort(t *testing.T) {
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volList := NewPersistentVolumeOrderedIndex()
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for _, pv := range createTestVolumes() {
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volList.Add(pv)
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}
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volumes, err := volList.ListByAccessModes([]api.PersistentVolumeAccessMode{api.ReadWriteOnce, api.ReadOnlyMany})
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if err != nil {
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t.Error("Unexpected error retrieving volumes by access modes:", err)
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}
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for i, expected := range []string{"gce-pd-1", "gce-pd-5", "gce-pd-10"} {
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if string(volumes[i].UID) != expected {
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t.Errorf("Incorrect ordering of persistent volumes. Expected %s but got %s", expected, volumes[i].UID)
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}
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}
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volumes, err = volList.ListByAccessModes([]api.PersistentVolumeAccessMode{api.ReadWriteOnce, api.ReadOnlyMany, api.ReadWriteMany})
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if err != nil {
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t.Error("Unexpected error retrieving volumes by access modes:", err)
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}
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for i, expected := range []string{"nfs-1", "nfs-5", "nfs-10"} {
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if string(volumes[i].UID) != expected {
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t.Errorf("Incorrect ordering of persistent volumes. Expected %s but got %s", expected, volumes[i].UID)
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}
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}
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}
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func TestAllPossibleAccessModes(t *testing.T) {
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index := NewPersistentVolumeOrderedIndex()
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for _, pv := range createTestVolumes() {
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index.Add(pv)
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}
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// the mock PVs creates contain 2 types of accessmodes: RWO+ROX and RWO+ROW+RWX
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possibleModes := index.allPossibleMatchingAccessModes([]api.PersistentVolumeAccessMode{api.ReadWriteOnce})
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if len(possibleModes) != 2 {
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t.Errorf("Expected 2 arrays of modes that match RWO, but got %v", len(possibleModes))
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}
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for _, m := range possibleModes {
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if !contains(m, api.ReadWriteOnce) {
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t.Errorf("AccessModes does not contain %s", api.ReadWriteOnce)
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}
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}
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possibleModes = index.allPossibleMatchingAccessModes([]api.PersistentVolumeAccessMode{api.ReadWriteMany})
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if len(possibleModes) != 1 {
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t.Errorf("Expected 1 array of modes that match RWX, but got %v", len(possibleModes))
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}
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if !contains(possibleModes[0], api.ReadWriteMany) {
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t.Errorf("AccessModes does not contain %s", api.ReadWriteOnce)
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}
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}
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func TestFindingVolumeWithDifferentAccessModes(t *testing.T) {
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gce := &api.PersistentVolume{
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ObjectMeta: api.ObjectMeta{UID: "001", Name: "gce"},
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Spec: api.PersistentVolumeSpec{
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Capacity: api.ResourceList{api.ResourceName(api.ResourceStorage): resource.MustParse("10G")},
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PersistentVolumeSource: api.PersistentVolumeSource{GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{}},
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AccessModes: []api.PersistentVolumeAccessMode{
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api.ReadWriteOnce,
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api.ReadOnlyMany,
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},
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},
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}
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ebs := &api.PersistentVolume{
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ObjectMeta: api.ObjectMeta{UID: "002", Name: "ebs"},
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Spec: api.PersistentVolumeSpec{
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Capacity: api.ResourceList{api.ResourceName(api.ResourceStorage): resource.MustParse("10G")},
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PersistentVolumeSource: api.PersistentVolumeSource{AWSElasticBlockStore: &api.AWSElasticBlockStoreVolumeSource{}},
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AccessModes: []api.PersistentVolumeAccessMode{
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api.ReadWriteOnce,
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},
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},
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}
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nfs := &api.PersistentVolume{
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ObjectMeta: api.ObjectMeta{UID: "003", Name: "nfs"},
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Spec: api.PersistentVolumeSpec{
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Capacity: api.ResourceList{api.ResourceName(api.ResourceStorage): resource.MustParse("10G")},
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PersistentVolumeSource: api.PersistentVolumeSource{NFS: &api.NFSVolumeSource{}},
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AccessModes: []api.PersistentVolumeAccessMode{
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api.ReadWriteOnce,
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api.ReadOnlyMany,
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api.ReadWriteMany,
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},
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},
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}
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claim := &api.PersistentVolumeClaim{
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ObjectMeta: api.ObjectMeta{
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Name: "claim01",
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Namespace: "myns",
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},
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Spec: api.PersistentVolumeClaimSpec{
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AccessModes: []api.PersistentVolumeAccessMode{api.ReadWriteOnce},
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Resources: api.ResourceRequirements{Requests: api.ResourceList{api.ResourceName(api.ResourceStorage): resource.MustParse("1G")}},
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},
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}
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index := NewPersistentVolumeOrderedIndex()
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index.Add(gce)
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index.Add(ebs)
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index.Add(nfs)
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volume, _ := index.FindBestMatchForClaim(claim)
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if volume.Name != ebs.Name {
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t.Errorf("Expected %s but got volume %s instead", ebs.Name, volume.Name)
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}
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claim.Spec.AccessModes = []api.PersistentVolumeAccessMode{api.ReadWriteOnce, api.ReadOnlyMany}
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volume, _ = index.FindBestMatchForClaim(claim)
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if volume.Name != gce.Name {
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t.Errorf("Expected %s but got volume %s instead", gce.Name, volume.Name)
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}
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// order of the requested modes should not matter
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claim.Spec.AccessModes = []api.PersistentVolumeAccessMode{api.ReadWriteMany, api.ReadWriteOnce, api.ReadOnlyMany}
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volume, _ = index.FindBestMatchForClaim(claim)
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if volume.Name != nfs.Name {
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t.Errorf("Expected %s but got volume %s instead", nfs.Name, volume.Name)
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}
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// fewer modes requested should still match
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claim.Spec.AccessModes = []api.PersistentVolumeAccessMode{api.ReadWriteMany}
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volume, _ = index.FindBestMatchForClaim(claim)
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if volume.Name != nfs.Name {
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t.Errorf("Expected %s but got volume %s instead", nfs.Name, volume.Name)
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}
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// pretend the exact match is bound. should get the next level up of modes.
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ebs.Spec.ClaimRef = &api.ObjectReference{}
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claim.Spec.AccessModes = []api.PersistentVolumeAccessMode{api.ReadWriteOnce}
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volume, _ = index.FindBestMatchForClaim(claim)
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if volume.Name != gce.Name {
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t.Errorf("Expected %s but got volume %s instead", gce.Name, volume.Name)
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}
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// continue up the levels of modes.
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gce.Spec.ClaimRef = &api.ObjectReference{}
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claim.Spec.AccessModes = []api.PersistentVolumeAccessMode{api.ReadWriteOnce}
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volume, _ = index.FindBestMatchForClaim(claim)
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if volume.Name != nfs.Name {
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t.Errorf("Expected %s but got volume %s instead", nfs.Name, volume.Name)
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}
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// partial mode request
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gce.Spec.ClaimRef = nil
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claim.Spec.AccessModes = []api.PersistentVolumeAccessMode{api.ReadOnlyMany}
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volume, _ = index.FindBestMatchForClaim(claim)
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if volume.Name != gce.Name {
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t.Errorf("Expected %s but got volume %s instead", gce.Name, volume.Name)
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}
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}
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func createTestVolumes() []*api.PersistentVolume {
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// these volumes are deliberately out-of-order to test indexing and sorting
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return []*api.PersistentVolume{
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{
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ObjectMeta: api.ObjectMeta{
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UID: "gce-pd-10",
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Name: "gce003",
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},
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Spec: api.PersistentVolumeSpec{
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Capacity: api.ResourceList{
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api.ResourceName(api.ResourceStorage): resource.MustParse("10G"),
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},
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PersistentVolumeSource: api.PersistentVolumeSource{
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GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{},
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},
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AccessModes: []api.PersistentVolumeAccessMode{
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api.ReadWriteOnce,
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api.ReadOnlyMany,
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},
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},
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},
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{
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ObjectMeta: api.ObjectMeta{
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UID: "gce-pd-20",
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Name: "gce004",
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},
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Spec: api.PersistentVolumeSpec{
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Capacity: api.ResourceList{
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api.ResourceName(api.ResourceStorage): resource.MustParse("20G"),
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},
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PersistentVolumeSource: api.PersistentVolumeSource{
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GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{},
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},
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AccessModes: []api.PersistentVolumeAccessMode{
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api.ReadWriteOnce,
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api.ReadOnlyMany,
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},
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// this one we're pretending is already bound
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ClaimRef: &api.ObjectReference{UID: "def456"},
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},
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},
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{
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ObjectMeta: api.ObjectMeta{
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UID: "nfs-5",
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Name: "nfs002",
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},
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Spec: api.PersistentVolumeSpec{
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Capacity: api.ResourceList{
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api.ResourceName(api.ResourceStorage): resource.MustParse("5G"),
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},
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PersistentVolumeSource: api.PersistentVolumeSource{
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Glusterfs: &api.GlusterfsVolumeSource{},
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},
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AccessModes: []api.PersistentVolumeAccessMode{
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api.ReadWriteOnce,
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api.ReadOnlyMany,
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api.ReadWriteMany,
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},
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},
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},
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{
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ObjectMeta: api.ObjectMeta{
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UID: "gce-pd-1",
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Name: "gce001",
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},
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Spec: api.PersistentVolumeSpec{
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Capacity: api.ResourceList{
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api.ResourceName(api.ResourceStorage): resource.MustParse("1G"),
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},
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PersistentVolumeSource: api.PersistentVolumeSource{
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GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{},
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},
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AccessModes: []api.PersistentVolumeAccessMode{
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api.ReadWriteOnce,
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api.ReadOnlyMany,
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},
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// this one we're pretending is already bound
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ClaimRef: &api.ObjectReference{UID: "abc123"},
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},
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},
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{
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ObjectMeta: api.ObjectMeta{
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UID: "nfs-10",
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Name: "nfs003",
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},
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Spec: api.PersistentVolumeSpec{
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Capacity: api.ResourceList{
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api.ResourceName(api.ResourceStorage): resource.MustParse("10G"),
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},
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PersistentVolumeSource: api.PersistentVolumeSource{
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Glusterfs: &api.GlusterfsVolumeSource{},
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},
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AccessModes: []api.PersistentVolumeAccessMode{
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api.ReadWriteOnce,
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api.ReadOnlyMany,
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api.ReadWriteMany,
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},
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},
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},
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{
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ObjectMeta: api.ObjectMeta{
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UID: "gce-pd-5",
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Name: "gce002",
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},
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Spec: api.PersistentVolumeSpec{
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Capacity: api.ResourceList{
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api.ResourceName(api.ResourceStorage): resource.MustParse("5G"),
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},
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PersistentVolumeSource: api.PersistentVolumeSource{
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GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{},
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},
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AccessModes: []api.PersistentVolumeAccessMode{
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api.ReadWriteOnce,
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api.ReadOnlyMany,
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},
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},
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},
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{
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ObjectMeta: api.ObjectMeta{
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UID: "nfs-1",
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Name: "nfs001",
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},
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Spec: api.PersistentVolumeSpec{
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Capacity: api.ResourceList{
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api.ResourceName(api.ResourceStorage): resource.MustParse("1G"),
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},
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PersistentVolumeSource: api.PersistentVolumeSource{
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Glusterfs: &api.GlusterfsVolumeSource{},
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},
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AccessModes: []api.PersistentVolumeAccessMode{
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api.ReadWriteOnce,
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api.ReadOnlyMany,
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api.ReadWriteMany,
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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 TestFindingPreboundVolumes(t *testing.T) {
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pv1 := &api.PersistentVolume{
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ObjectMeta: api.ObjectMeta{
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Name: "pv1",
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Annotations: map[string]string{},
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},
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Spec: api.PersistentVolumeSpec{
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Capacity: api.ResourceList{api.ResourceName(api.ResourceStorage): resource.MustParse("1Gi")},
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PersistentVolumeSource: api.PersistentVolumeSource{HostPath: &api.HostPathVolumeSource{}},
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AccessModes: []api.PersistentVolumeAccessMode{api.ReadWriteOnce},
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},
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}
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pv5 := &api.PersistentVolume{
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ObjectMeta: api.ObjectMeta{
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Name: "pv5",
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Annotations: map[string]string{},
|
|
},
|
|
Spec: api.PersistentVolumeSpec{
|
|
Capacity: api.ResourceList{api.ResourceName(api.ResourceStorage): resource.MustParse("5Gi")},
|
|
PersistentVolumeSource: api.PersistentVolumeSource{HostPath: &api.HostPathVolumeSource{}},
|
|
AccessModes: []api.PersistentVolumeAccessMode{api.ReadWriteOnce},
|
|
},
|
|
}
|
|
|
|
pv8 := &api.PersistentVolume{
|
|
ObjectMeta: api.ObjectMeta{
|
|
Name: "pv8",
|
|
Annotations: map[string]string{},
|
|
},
|
|
Spec: api.PersistentVolumeSpec{
|
|
Capacity: api.ResourceList{api.ResourceName(api.ResourceStorage): resource.MustParse("8Gi")},
|
|
PersistentVolumeSource: api.PersistentVolumeSource{HostPath: &api.HostPathVolumeSource{}},
|
|
AccessModes: []api.PersistentVolumeAccessMode{api.ReadWriteOnce},
|
|
},
|
|
}
|
|
|
|
claim := &api.PersistentVolumeClaim{
|
|
ObjectMeta: api.ObjectMeta{
|
|
Name: "claim01",
|
|
Namespace: "myns",
|
|
},
|
|
Spec: api.PersistentVolumeClaimSpec{
|
|
AccessModes: []api.PersistentVolumeAccessMode{api.ReadWriteOnce},
|
|
Resources: api.ResourceRequirements{Requests: api.ResourceList{api.ResourceName(api.ResourceStorage): resource.MustParse("1Gi")}},
|
|
},
|
|
}
|
|
|
|
index := NewPersistentVolumeOrderedIndex()
|
|
index.Add(pv1)
|
|
index.Add(pv5)
|
|
index.Add(pv8)
|
|
|
|
// expected exact match on size
|
|
volume, _ := index.FindBestMatchForClaim(claim)
|
|
if volume.Name != pv1.Name {
|
|
t.Errorf("Expected %s but got volume %s instead", pv1.Name, volume.Name)
|
|
}
|
|
|
|
// pretend the exact match is pre-bound. should get the next size up.
|
|
pv1.Annotations[createdForKey] = "some/other/claim"
|
|
volume, _ = index.FindBestMatchForClaim(claim)
|
|
if volume.Name != pv5.Name {
|
|
t.Errorf("Expected %s but got volume %s instead", pv5.Name, volume.Name)
|
|
}
|
|
|
|
// pretend the exact match is available but the largest volume is pre-bound to the claim.
|
|
delete(pv1.Annotations, createdForKey)
|
|
pv8.Annotations[createdForKey] = "myns/claim01"
|
|
volume, _ = index.FindBestMatchForClaim(claim)
|
|
if volume.Name != pv8.Name {
|
|
t.Errorf("Expected %s but got volume %s instead", pv8.Name, volume.Name)
|
|
}
|
|
}
|