898 lines
31 KiB
Go
898 lines
31 KiB
Go
/*
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Copyright 2015 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 e2e
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import (
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"fmt"
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"time"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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apierrs "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/resource"
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
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"k8s.io/kubernetes/pkg/volume/util/volumehelper"
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"k8s.io/kubernetes/test/e2e/framework"
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)
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// Map of all PVs used in the multi pv-pvc tests. The key is the PV's name, which is
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// guaranteed to be unique. The value is {} (empty struct) since we're only interested
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// in the PV's name and if it is present. We must always Get the pv object before
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// referencing any of its values, eg its ClaimRef.
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type pvval struct{}
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type pvmap map[string]pvval
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// Map of all PVCs used in the multi pv-pvc tests. The key is "namespace/pvc.Name". The
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// value is {} (empty struct) since we're only interested in the PVC's name and if it is
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// present. We must always Get the pvc object before referencing any of its values, eg.
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// its VolumeName.
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// Note: It's unsafe to add keys to a map in a loop. Their insertion in the map is
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// unpredictable and can result in the same key being iterated over again.
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type pvcval struct{}
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type pvcmap map[types.NamespacedName]pvcval
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// Configuration for a persistent volume. To create PVs for varying storage options (NFS, ceph, glusterFS, etc.)
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// define the pvSource as below. prebind holds a pre-bound PVC if there is one.
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// pvSource: api.PersistentVolumeSource{
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// NFS: &api.NFSVolumeSource{
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// .
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// .
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// .
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// },
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// }
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type persistentVolumeConfig struct {
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pvSource v1.PersistentVolumeSource
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prebind *v1.PersistentVolumeClaim
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namePrefix string
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}
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// Delete the nfs-server pod. Only done once per KubeDescription().
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func nfsServerPodCleanup(c clientset.Interface, config VolumeTestConfig) {
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defer GinkgoRecover()
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podClient := c.Core().Pods(config.namespace)
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if config.serverImage != "" {
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podName := config.prefix + "-server"
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err := podClient.Delete(podName, nil)
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Expect(err).NotTo(HaveOccurred())
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}
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}
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// Clean up a pv and pvc in a single pv/pvc test case.
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func pvPvcCleanup(c clientset.Interface, ns string, pv *v1.PersistentVolume, pvc *v1.PersistentVolumeClaim) {
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deletePersistentVolumeClaim(c, pvc.Name, ns)
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deletePersistentVolume(c, pv.Name)
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}
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// Clean up pvs and pvcs in multi-pv-pvc test cases. All entries found in the pv and
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// claims maps are deleted.
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func pvPvcMapCleanup(c clientset.Interface, ns string, pvols pvmap, claims pvcmap) {
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for pvcKey := range claims {
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deletePersistentVolumeClaim(c, pvcKey.Name, ns)
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delete(claims, pvcKey)
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}
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for pvKey := range pvols {
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deletePersistentVolume(c, pvKey)
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delete(pvols, pvKey)
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}
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}
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// Delete the PV.
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func deletePersistentVolume(c clientset.Interface, pvName string) {
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if c != nil && len(pvName) > 0 {
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framework.Logf("Deleting PersistentVolume %v", pvName)
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err := c.Core().PersistentVolumes().Delete(pvName, nil)
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if err != nil && !apierrs.IsNotFound(err) {
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Expect(err).NotTo(HaveOccurred())
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}
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}
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}
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// Delete the Claim
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func deletePersistentVolumeClaim(c clientset.Interface, pvcName string, ns string) {
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if c != nil && len(pvcName) > 0 {
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framework.Logf("Deleting PersistentVolumeClaim %v", pvcName)
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err := c.Core().PersistentVolumeClaims(ns).Delete(pvcName, nil)
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if err != nil && !apierrs.IsNotFound(err) {
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Expect(err).NotTo(HaveOccurred())
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}
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}
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}
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// Delete the PVC and wait for the PV to become Available again. Validate that the PV
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// has recycled (assumption here about reclaimPolicy). Caller tells this func which
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// phase value to expect for the pv bound to the to-be-deleted claim.
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func deletePVCandValidatePV(c clientset.Interface, ns string, pvc *v1.PersistentVolumeClaim, pv *v1.PersistentVolume, expctPVPhase v1.PersistentVolumePhase) {
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pvname := pvc.Spec.VolumeName
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framework.Logf("Deleting PVC %v to trigger recycling of PV %v", pvc.Name, pvname)
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deletePersistentVolumeClaim(c, pvc.Name, ns)
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// Check that the PVC is really deleted.
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pvc, err := c.Core().PersistentVolumeClaims(ns).Get(pvc.Name, metav1.GetOptions{})
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Expect(apierrs.IsNotFound(err)).To(BeTrue())
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// Wait for the PV's phase to return to Available
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framework.Logf("Waiting for recycling process to complete.")
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err = framework.WaitForPersistentVolumePhase(expctPVPhase, c, pv.Name, 1*time.Second, 300*time.Second)
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Expect(err).NotTo(HaveOccurred())
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// examine the pv's ClaimRef and UID and compare to expected values
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pv, err = c.Core().PersistentVolumes().Get(pv.Name, metav1.GetOptions{})
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Expect(err).NotTo(HaveOccurred())
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cr := pv.Spec.ClaimRef
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if expctPVPhase == v1.VolumeAvailable {
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if cr != nil { // may be ok if cr != nil
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Expect(len(cr.UID)).To(BeZero())
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}
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} else if expctPVPhase == v1.VolumeBound {
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Expect(cr).NotTo(BeNil())
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Expect(len(cr.UID)).NotTo(BeZero())
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}
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framework.Logf("PV %v now in %q phase", pv.Name, expctPVPhase)
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}
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// Wraps deletePVCandValidatePV() by calling the function in a loop over the PV map. Only
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// bound PVs are deleted. Validates that the claim was deleted and the PV is Available.
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// Note: if there are more claims than pvs then some of the remaining claims will bind to
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// the just-made-available pvs.
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func deletePVCandValidatePVGroup(c clientset.Interface, ns string, pvols pvmap, claims pvcmap) {
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var boundPVs, deletedPVCs int
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var expctPVPhase v1.PersistentVolumePhase
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for pvName := range pvols {
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pv, err := c.Core().PersistentVolumes().Get(pvName, metav1.GetOptions{})
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Expect(apierrs.IsNotFound(err)).To(BeFalse())
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cr := pv.Spec.ClaimRef
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// if pv is bound then delete the pvc it is bound to
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if cr != nil && len(cr.Name) > 0 {
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boundPVs++
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// Assert bound PVC is tracked in this test. Failing this might
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// indicate external PVCs interfering with the test.
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pvcKey := makePvcKey(ns, cr.Name)
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_, found := claims[pvcKey]
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Expect(found).To(BeTrue())
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pvc, err := c.Core().PersistentVolumeClaims(ns).Get(cr.Name, metav1.GetOptions{})
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Expect(apierrs.IsNotFound(err)).To(BeFalse())
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// what Phase do we expect the PV that was bound to the claim to
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// be in after that claim is deleted?
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expctPVPhase = v1.VolumeAvailable
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if len(claims) > len(pvols) {
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// there are excess pvcs so expect the previously bound
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// PV to become bound again
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expctPVPhase = v1.VolumeBound
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}
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deletePVCandValidatePV(c, ns, pvc, pv, expctPVPhase)
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delete(claims, pvcKey)
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deletedPVCs++
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}
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}
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Expect(boundPVs).To(Equal(deletedPVCs))
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}
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// create the PV resource. Fails test on error.
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func createPV(c clientset.Interface, pv *v1.PersistentVolume) *v1.PersistentVolume {
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pv, err := c.Core().PersistentVolumes().Create(pv)
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Expect(err).NotTo(HaveOccurred())
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return pv
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}
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// create the PVC resource. Fails test on error.
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func createPVC(c clientset.Interface, ns string, pvc *v1.PersistentVolumeClaim) *v1.PersistentVolumeClaim {
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pvc, err := c.Core().PersistentVolumeClaims(ns).Create(pvc)
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Expect(err).NotTo(HaveOccurred())
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return pvc
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}
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// Create a PVC followed by the PV based on the passed in nfs-server ip and
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// namespace. If the "preBind" bool is true then pre-bind the PV to the PVC
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// via the PV's ClaimRef. Return the pv and pvc to reflect the created objects.
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// Note: in the pre-bind case the real PVC name, which is generated, is not
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// known until after the PVC is instantiated. This is why the pvc is created
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// before the pv.
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func createPVCPV(c clientset.Interface, pvConfig persistentVolumeConfig, ns string, preBind bool) (*v1.PersistentVolume, *v1.PersistentVolumeClaim) {
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var preBindMsg string
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// make the pvc definition first
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pvc := makePersistentVolumeClaim(ns)
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if preBind {
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preBindMsg = " pre-bound"
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pvConfig.prebind = pvc
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}
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// make the pv spec
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pv := makePersistentVolume(pvConfig)
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By(fmt.Sprintf("Creating a PVC followed by a%s PV", preBindMsg))
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// instantiate the pvc
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pvc = createPVC(c, ns, pvc)
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// instantiate the pv, handle pre-binding by ClaimRef if needed
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if preBind {
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pv.Spec.ClaimRef.Name = pvc.Name
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}
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pv = createPV(c, pv)
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return pv, pvc
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}
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// Create a PV followed by the PVC based on the passed in nfs-server ip and
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// namespace. If the "preBind" bool is true then pre-bind the PVC to the PV
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// via the PVC's VolumeName. Return the pv and pvc to reflect the created
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// objects.
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// Note: in the pre-bind case the real PV name, which is generated, is not
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// known until after the PV is instantiated. This is why the pv is created
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// before the pvc.
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func createPVPVC(c clientset.Interface, pvConfig persistentVolumeConfig, ns string, preBind bool) (*v1.PersistentVolume, *v1.PersistentVolumeClaim) {
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preBindMsg := ""
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if preBind {
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preBindMsg = " pre-bound"
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}
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framework.Logf("Creating a PV followed by a%s PVC", preBindMsg)
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// make the pv and pvc definitions
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pv := makePersistentVolume(pvConfig)
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pvc := makePersistentVolumeClaim(ns)
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// instantiate the pv
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pv = createPV(c, pv)
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// instantiate the pvc, handle pre-binding by VolumeName if needed
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if preBind {
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pvc.Spec.VolumeName = pv.Name
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}
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pvc = createPVC(c, ns, pvc)
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return pv, pvc
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}
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// Create the desired number of PVs and PVCs and return them in separate maps. If the
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// number of PVs != the number of PVCs then the min of those two counts is the number of
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// PVs expected to bind.
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func createPVsPVCs(numpvs, numpvcs int, c clientset.Interface, ns string, pvConfig persistentVolumeConfig) (pvmap, pvcmap) {
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var i int
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var pv *v1.PersistentVolume
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var pvc *v1.PersistentVolumeClaim
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pvMap := make(pvmap, numpvs)
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pvcMap := make(pvcmap, numpvcs)
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var extraPVs, extraPVCs int
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extraPVs = numpvs - numpvcs
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if extraPVs < 0 {
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extraPVCs = -extraPVs
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extraPVs = 0
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}
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pvsToCreate := numpvs - extraPVs // want the min(numpvs, numpvcs)
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// create pvs and pvcs
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for i = 0; i < pvsToCreate; i++ {
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pv, pvc = createPVPVC(c, pvConfig, ns, false)
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pvMap[pv.Name] = pvval{}
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pvcMap[makePvcKey(ns, pvc.Name)] = pvcval{}
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}
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// create extra pvs or pvcs as needed
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for i = 0; i < extraPVs; i++ {
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pv = makePersistentVolume(pvConfig)
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pv = createPV(c, pv)
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pvMap[pv.Name] = pvval{}
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}
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for i = 0; i < extraPVCs; i++ {
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pvc = makePersistentVolumeClaim(ns)
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pvc = createPVC(c, ns, pvc)
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pvcMap[makePvcKey(ns, pvc.Name)] = pvcval{}
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}
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return pvMap, pvcMap
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}
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// Wait for the pv and pvc to bind to each other.
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func waitOnPVandPVC(c clientset.Interface, ns string, pv *v1.PersistentVolume, pvc *v1.PersistentVolumeClaim) {
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// Wait for newly created PVC to bind to the PV
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framework.Logf("Waiting for PV %v to bind to PVC %v", pv.Name, pvc.Name)
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err := framework.WaitForPersistentVolumeClaimPhase(v1.ClaimBound, c, ns, pvc.Name, 3*time.Second, 300*time.Second)
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Expect(err).NotTo(HaveOccurred())
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// Wait for PersistentVolume.Status.Phase to be Bound, which it should be
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// since the PVC is already bound.
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err = framework.WaitForPersistentVolumePhase(v1.VolumeBound, c, pv.Name, 3*time.Second, 300*time.Second)
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Expect(err).NotTo(HaveOccurred())
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// Re-get the pv and pvc objects
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pv, err = c.Core().PersistentVolumes().Get(pv.Name, metav1.GetOptions{})
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Expect(err).NotTo(HaveOccurred())
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// Re-get the pvc and
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pvc, err = c.Core().PersistentVolumeClaims(ns).Get(pvc.Name, metav1.GetOptions{})
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Expect(err).NotTo(HaveOccurred())
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// The pv and pvc are both bound, but to each other?
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// Check that the PersistentVolume.ClaimRef matches the PVC
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Expect(pv.Spec.ClaimRef).NotTo(BeNil())
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Expect(pv.Spec.ClaimRef.Name).To(Equal(pvc.Name))
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Expect(pvc.Spec.VolumeName).To(Equal(pv.Name))
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Expect(pv.Spec.ClaimRef.UID).To(Equal(pvc.UID))
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}
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// Search for bound PVs and PVCs by examining pvols for non-nil claimRefs.
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// NOTE: Each iteration waits for a maximum of 3 minutes per PV and, if the PV is bound,
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// up to 3 minutes for the PVC. When the number of PVs != number of PVCs, this can lead
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// to situations where the maximum wait times are reached several times in succession,
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// extending test time. Thus, it is recommended to keep the delta between PVs and PVCs
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// small.
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func waitAndVerifyBinds(c clientset.Interface, ns string, pvols pvmap, claims pvcmap, testExpected bool) {
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var actualBinds int
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expectedBinds := len(pvols)
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if expectedBinds > len(claims) { // want the min of # pvs or #pvcs
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expectedBinds = len(claims)
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}
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for pvName := range pvols {
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err := framework.WaitForPersistentVolumePhase(v1.VolumeBound, c, pvName, 3*time.Second, 180*time.Second)
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if err != nil && len(pvols) > len(claims) {
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framework.Logf("WARN: pv %v is not bound after max wait", pvName)
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framework.Logf(" This may be ok since there are more pvs than pvcs")
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continue
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}
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Expect(err).NotTo(HaveOccurred())
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pv, err := c.Core().PersistentVolumes().Get(pvName, metav1.GetOptions{})
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Expect(err).NotTo(HaveOccurred())
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if cr := pv.Spec.ClaimRef; cr != nil && len(cr.Name) > 0 {
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// Assert bound pvc is a test resource. Failing assertion could
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// indicate non-test PVC interference or a bug in the test
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pvcKey := makePvcKey(ns, cr.Name)
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_, found := claims[pvcKey]
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Expect(found).To(BeTrue())
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err = framework.WaitForPersistentVolumeClaimPhase(v1.ClaimBound, c, ns, cr.Name, 3*time.Second, 180*time.Second)
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Expect(err).NotTo(HaveOccurred())
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actualBinds++
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}
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}
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if testExpected {
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Expect(actualBinds).To(Equal(expectedBinds))
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}
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}
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// Test the pod's exit code to be zero.
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func testPodSuccessOrFail(c clientset.Interface, ns string, pod *v1.Pod) {
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By("Pod should terminate with exitcode 0 (success)")
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err := framework.WaitForPodSuccessInNamespace(c, pod.Name, ns)
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Expect(err).NotTo(HaveOccurred())
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framework.Logf("Pod %v succeeded ", pod.Name)
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}
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// Delete the passed in pod.
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func deletePod(f *framework.Framework, c clientset.Interface, ns string, pod *v1.Pod) {
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if c != nil {
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if pod != nil && len(pod.Name) > 0 {
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framework.Logf("Deleting pod %v", pod.Name)
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err := c.Core().Pods(ns).Delete(pod.Name, nil)
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if err != nil && !apierrs.IsNotFound(err) {
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Expect(err).NotTo(HaveOccurred())
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}
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// Wait for pod to terminate. Expect apierr NotFound
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err = f.WaitForPodTerminated(pod.Name, "")
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if err != nil && !apierrs.IsNotFound(err) {
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Expect(err).NotTo(HaveOccurred())
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}
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framework.Logf("Ignore \"not found\" error above. Pod %v successfully deleted", pod.Name)
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}
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}
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}
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// Create the test pod, wait for (hopefully) success, and then delete the pod.
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func createWaitAndDeletePod(f *framework.Framework, c clientset.Interface, ns string, claimName string) {
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framework.Logf("Creating nfs test pod")
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// Make pod spec
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pod := makeWritePod(ns, claimName)
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// Instantiate pod (Create)
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runPod, err := c.Core().Pods(ns).Create(pod)
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Expect(err).NotTo(HaveOccurred())
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Expect(runPod).NotTo(BeNil())
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defer deletePod(f, c, ns, runPod)
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// Wait for the test pod to complete its lifecycle
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testPodSuccessOrFail(c, ns, runPod)
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}
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// Validate PV/PVC, create and verify writer pod, delete the PVC, and validate the PV's
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// phase. Note: the PV is deleted in the AfterEach, not here.
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func completeTest(f *framework.Framework, c clientset.Interface, ns string, pv *v1.PersistentVolume, pvc *v1.PersistentVolumeClaim) {
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// 1. verify that the PV and PVC have binded correctly
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By("Validating the PV-PVC binding")
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waitOnPVandPVC(c, ns, pv, pvc)
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|
|
// 2. create the nfs writer pod, test if the write was successful,
|
|
// then delete the pod and verify that it was deleted
|
|
By("Checking pod has write access to PersistentVolume")
|
|
createWaitAndDeletePod(f, c, ns, pvc.Name)
|
|
|
|
// 3. delete the PVC, wait for PV to become "Available"
|
|
By("Deleting the PVC to invoke the recycler")
|
|
deletePVCandValidatePV(c, ns, pvc, pv, v1.VolumeAvailable)
|
|
}
|
|
|
|
// Validate pairs of PVs and PVCs, create and verify writer pod, delete PVC and validate
|
|
// PV. Ensure each step succeeds.
|
|
// Note: the PV is deleted in the AfterEach, not here.
|
|
// Note: this func is serialized, we wait for each pod to be deleted before creating the
|
|
// next pod. Adding concurrency is a TODO item.
|
|
// Note: this func is called recursively when there are more claims than pvs.
|
|
func completeMultiTest(f *framework.Framework, c clientset.Interface, ns string, pvols pvmap, claims pvcmap) {
|
|
|
|
// 1. verify each PV permits write access to a client pod
|
|
By("Checking pod has write access to PersistentVolumes")
|
|
for pvcKey := range claims {
|
|
pvc, err := c.Core().PersistentVolumeClaims(pvcKey.Namespace).Get(pvcKey.Name, metav1.GetOptions{})
|
|
Expect(err).NotTo(HaveOccurred())
|
|
if len(pvc.Spec.VolumeName) == 0 {
|
|
continue // claim is not bound
|
|
}
|
|
// sanity test to ensure our maps are in sync
|
|
_, found := pvols[pvc.Spec.VolumeName]
|
|
Expect(found).To(BeTrue())
|
|
// TODO: currently a serialized test of each PV
|
|
createWaitAndDeletePod(f, c, pvcKey.Namespace, pvcKey.Name)
|
|
}
|
|
|
|
// 2. delete each PVC, wait for its bound PV to become "Available"
|
|
By("Deleting PVCs to invoke recycler")
|
|
deletePVCandValidatePVGroup(c, ns, pvols, claims)
|
|
}
|
|
|
|
var _ = framework.KubeDescribe("PersistentVolumes", func() {
|
|
|
|
// global vars for the Context()s and It()'s below
|
|
f := framework.NewDefaultFramework("pv")
|
|
var c clientset.Interface
|
|
var ns string
|
|
|
|
BeforeEach(func() {
|
|
c = f.ClientSet
|
|
ns = f.Namespace.Name
|
|
})
|
|
|
|
///////////////////////////////////////////////////////////////////////
|
|
// NFS
|
|
///////////////////////////////////////////////////////////////////////
|
|
// Testing configurations of a single a PV/PVC pair, multiple evenly paired PVs/PVCs,
|
|
// and multiple unevenly paired PV/PVCs
|
|
framework.KubeDescribe("PersistentVolumes:NFS", func() {
|
|
|
|
var (
|
|
NFSconfig VolumeTestConfig
|
|
nfsServerPod *v1.Pod
|
|
serverIP string
|
|
pvConfig persistentVolumeConfig
|
|
)
|
|
|
|
// config for the nfs-server pod in the default namespace
|
|
NFSconfig = VolumeTestConfig{
|
|
namespace: metav1.NamespaceDefault,
|
|
prefix: "nfs",
|
|
serverImage: NfsServerImage,
|
|
serverPorts: []int{2049},
|
|
serverArgs: []string{"-G", "777", "/exports"},
|
|
}
|
|
|
|
BeforeEach(func() {
|
|
// If it doesn't exist, create the nfs server pod in the "default" ns.
|
|
// The "default" ns is used so that individual tests can delete their
|
|
// ns without impacting the nfs-server pod.
|
|
if nfsServerPod == nil {
|
|
nfsServerPod = startVolumeServer(c, NFSconfig)
|
|
serverIP = nfsServerPod.Status.PodIP
|
|
framework.Logf("NFS server IP address: %v", serverIP)
|
|
}
|
|
pvConfig = persistentVolumeConfig{
|
|
namePrefix: "nfs-",
|
|
pvSource: v1.PersistentVolumeSource{
|
|
NFS: &v1.NFSVolumeSource{
|
|
Server: serverIP,
|
|
Path: "/exports",
|
|
ReadOnly: false,
|
|
},
|
|
},
|
|
}
|
|
})
|
|
|
|
// Execute after *all* the tests have run
|
|
AddCleanupAction(func() {
|
|
if nfsServerPod != nil && c != nil {
|
|
framework.Logf("AfterSuite: nfs-server pod %v is non-nil, deleting pod", nfsServerPod.Name)
|
|
nfsServerPodCleanup(c, NFSconfig)
|
|
nfsServerPod = nil
|
|
}
|
|
})
|
|
|
|
Context("with Single PV - PVC pairs", func() {
|
|
|
|
var pv *v1.PersistentVolume
|
|
var pvc *v1.PersistentVolumeClaim
|
|
|
|
// Note: this is the only code where the pv is deleted.
|
|
AfterEach(func() {
|
|
framework.Logf("AfterEach: Cleaning up test resources.")
|
|
pvPvcCleanup(c, ns, pv, pvc)
|
|
})
|
|
|
|
// Individual tests follow:
|
|
//
|
|
// Create an nfs PV, then a claim that matches the PV, and a pod that
|
|
// contains the claim. Verify that the PV and PVC bind correctly, and
|
|
// that the pod can write to the nfs volume.
|
|
It("should create a non-pre-bound PV and PVC: test write access [Volume][Serial][Flaky]", func() {
|
|
pv, pvc = createPVPVC(c, pvConfig, ns, false)
|
|
completeTest(f, c, ns, pv, pvc)
|
|
})
|
|
|
|
// Create a claim first, then a nfs PV that matches the claim, and a
|
|
// pod that contains the claim. Verify that the PV and PVC bind
|
|
// correctly, and that the pod can write to the nfs volume.
|
|
It("create a PVC and non-pre-bound PV: test write access [Volume][Serial][Flaky]", func() {
|
|
pv, pvc = createPVCPV(c, pvConfig, ns, false)
|
|
completeTest(f, c, ns, pv, pvc)
|
|
})
|
|
|
|
// Create a claim first, then a pre-bound nfs PV that matches the claim,
|
|
// and a pod that contains the claim. Verify that the PV and PVC bind
|
|
// correctly, and that the pod can write to the nfs volume.
|
|
It("create a PVC and a pre-bound PV: test write access [Volume][Serial][Flaky]", func() {
|
|
pv, pvc = createPVCPV(c, pvConfig, ns, true)
|
|
completeTest(f, c, ns, pv, pvc)
|
|
})
|
|
|
|
// Create a nfs PV first, then a pre-bound PVC that matches the PV,
|
|
// and a pod that contains the claim. Verify that the PV and PVC bind
|
|
// correctly, and that the pod can write to the nfs volume.
|
|
It("create a PV and a pre-bound PVC: test write access [Volume][Serial][Flaky]", func() {
|
|
pv, pvc = createPVPVC(c, pvConfig, ns, true)
|
|
completeTest(f, c, ns, pv, pvc)
|
|
})
|
|
})
|
|
|
|
// Create multiple pvs and pvcs, all in the same namespace. The PVs-PVCs are
|
|
// verified to bind, though it's not known in advanced which PV will bind to
|
|
// which claim. For each pv-pvc pair create a pod that writes to the nfs mount.
|
|
// Note: when the number of PVs exceeds the number of PVCs the max binding wait
|
|
// time will occur for each PV in excess. This is expected but the delta
|
|
// should be kept small so that the tests aren't unnecessarily slow.
|
|
// Note: future tests may wish to incorporate the following:
|
|
// a) pre-binding, b) create pvcs before pvs, c) create pvcs and pods
|
|
// in different namespaces.
|
|
Context("with multiple PVs and PVCs all in same ns", func() {
|
|
|
|
// define the maximum number of PVs and PVCs supported by these tests
|
|
const maxNumPVs = 10
|
|
const maxNumPVCs = 10
|
|
// create the pv and pvc maps to be reused in the It blocks
|
|
pvols := make(pvmap, maxNumPVs)
|
|
claims := make(pvcmap, maxNumPVCs)
|
|
|
|
AfterEach(func() {
|
|
framework.Logf("AfterEach: deleting %v PVCs and %v PVs...", len(claims), len(pvols))
|
|
pvPvcMapCleanup(c, ns, pvols, claims)
|
|
})
|
|
|
|
// Create 2 PVs and 4 PVCs.
|
|
// Note: PVs are created before claims and no pre-binding
|
|
It("should create 2 PVs and 4 PVCs: test write access [Volume][Serial][Flaky]", func() {
|
|
numPVs, numPVCs := 2, 4
|
|
pvols, claims = createPVsPVCs(numPVs, numPVCs, c, ns, pvConfig)
|
|
waitAndVerifyBinds(c, ns, pvols, claims, true)
|
|
completeMultiTest(f, c, ns, pvols, claims)
|
|
})
|
|
|
|
// Create 3 PVs and 3 PVCs.
|
|
// Note: PVs are created before claims and no pre-binding
|
|
It("should create 3 PVs and 3 PVCs: test write access [Volume][Serial][Flaky]", func() {
|
|
numPVs, numPVCs := 3, 3
|
|
pvols, claims = createPVsPVCs(numPVs, numPVCs, c, ns, pvConfig)
|
|
waitAndVerifyBinds(c, ns, pvols, claims, true)
|
|
completeMultiTest(f, c, ns, pvols, claims)
|
|
})
|
|
|
|
// Create 4 PVs and 2 PVCs.
|
|
// Note: PVs are created before claims and no pre-binding.
|
|
It("should create 4 PVs and 2 PVCs: test write access [Volume][Serial][Flaky]", func() {
|
|
numPVs, numPVCs := 4, 2
|
|
pvols, claims = createPVsPVCs(numPVs, numPVCs, c, ns, pvConfig)
|
|
waitAndVerifyBinds(c, ns, pvols, claims, true)
|
|
completeMultiTest(f, c, ns, pvols, claims)
|
|
})
|
|
})
|
|
})
|
|
///////////////////////////////////////////////////////////////////////
|
|
// GCE PD
|
|
///////////////////////////////////////////////////////////////////////
|
|
// Testing configurations of single a PV/PVC pair attached to a GCE PD
|
|
framework.KubeDescribe("PersistentVolumes:GCEPD", func() {
|
|
|
|
var (
|
|
diskName string
|
|
err error
|
|
pv *v1.PersistentVolume
|
|
pvc *v1.PersistentVolumeClaim
|
|
clientPod *v1.Pod
|
|
pvConfig persistentVolumeConfig
|
|
)
|
|
|
|
BeforeEach(func() {
|
|
framework.SkipUnlessProviderIs("gce")
|
|
if diskName == "" {
|
|
diskName, err = createPDWithRetry()
|
|
Expect(err).NotTo(HaveOccurred())
|
|
pvConfig = persistentVolumeConfig{
|
|
namePrefix: "gce-",
|
|
pvSource: v1.PersistentVolumeSource{
|
|
GCEPersistentDisk: &v1.GCEPersistentDiskVolumeSource{
|
|
PDName: diskName,
|
|
FSType: "ext3",
|
|
ReadOnly: false,
|
|
},
|
|
},
|
|
prebind: nil,
|
|
}
|
|
}
|
|
})
|
|
|
|
AfterEach(func() {
|
|
framework.Logf("AfterEach: Cleaning up test resources")
|
|
if c != nil {
|
|
deletePod(f, c, ns, clientPod)
|
|
pvPvcCleanup(c, ns, pv, pvc)
|
|
clientPod = nil
|
|
pvc = nil
|
|
pv = nil
|
|
}
|
|
})
|
|
|
|
AddCleanupAction(func() {
|
|
if len(diskName) > 0 {
|
|
deletePDWithRetry(diskName)
|
|
}
|
|
})
|
|
|
|
// Attach a persistent disk to a pod using a PVC.
|
|
// Delete the PVC and then the pod. Expect the pod to succeed in unmounting and detaching PD on delete.
|
|
It("should test that deleting a PVC before the pod does not cause pod deletion to fail on PD detach [Volume][Serial][Flaky]", func() {
|
|
By("Creating the PV and PVC")
|
|
pv, pvc = createPVPVC(c, pvConfig, ns, false)
|
|
waitOnPVandPVC(c, ns, pv, pvc)
|
|
|
|
By("Creating the Client Pod")
|
|
clientPod = createClientPod(c, ns, pvc)
|
|
node := types.NodeName(clientPod.Spec.NodeName)
|
|
|
|
By("Deleting the Claim")
|
|
deletePersistentVolumeClaim(c, pvc.Name, ns)
|
|
verifyGCEDiskAttached(diskName, node)
|
|
|
|
By("Deleting the Pod")
|
|
deletePod(f, c, ns, clientPod)
|
|
|
|
By("Verifying Persistent Disk detach")
|
|
err = waitForPDDetach(diskName, node)
|
|
Expect(err).NotTo(HaveOccurred())
|
|
})
|
|
|
|
// Attach a persistent disk to a pod using a PVC.
|
|
// Delete the PV and then the pod. Expect the pod to succeed in unmounting and detaching PD on delete.
|
|
It("should test that deleting the PV before the pod does not cause pod deletion to fail on PD detach [Volume][Serial][Flaky]", func() {
|
|
By("Creating the PV and PVC")
|
|
pv, pvc = createPVPVC(c, pvConfig, ns, false)
|
|
waitOnPVandPVC(c, ns, pv, pvc)
|
|
|
|
By("Creating the Client Pod")
|
|
clientPod = createClientPod(c, ns, pvc)
|
|
node := types.NodeName(clientPod.Spec.NodeName)
|
|
|
|
By("Deleting the Persistent Volume")
|
|
deletePersistentVolume(c, pv.Name)
|
|
verifyGCEDiskAttached(diskName, node)
|
|
|
|
By("Deleting the client pod")
|
|
deletePod(f, c, ns, clientPod)
|
|
|
|
By("Verifying Persistent Disk detaches")
|
|
err = waitForPDDetach(diskName, node)
|
|
Expect(err).NotTo(HaveOccurred())
|
|
})
|
|
})
|
|
})
|
|
|
|
// Sanity check for GCE testing. Verify the persistent disk attached to the node.
|
|
func verifyGCEDiskAttached(diskName string, nodeName types.NodeName) bool {
|
|
gceCloud, err := getGCECloud()
|
|
Expect(err).NotTo(HaveOccurred())
|
|
isAttached, err := gceCloud.DiskIsAttached(diskName, nodeName)
|
|
Expect(err).NotTo(HaveOccurred())
|
|
return isAttached
|
|
}
|
|
|
|
// Return a pvckey struct.
|
|
func makePvcKey(ns, name string) types.NamespacedName {
|
|
return types.NamespacedName{Namespace: ns, Name: name}
|
|
}
|
|
|
|
// Returns a PV definition based on the nfs server IP. If the PVC is not nil
|
|
// then the PV is defined with a ClaimRef which includes the PVC's namespace.
|
|
// If the PVC is nil then the PV is not defined with a ClaimRef.
|
|
// Note: the passed-in claim does not have a name until it is created
|
|
// (instantiated) and thus the PV's ClaimRef cannot be completely filled-in in
|
|
// this func. Therefore, the ClaimRef's name is added later in
|
|
// createPVCPV.
|
|
|
|
func makePersistentVolume(pvConfig persistentVolumeConfig) *v1.PersistentVolume {
|
|
// Specs are expected to match this test's PersistentVolumeClaim
|
|
|
|
var claimRef *v1.ObjectReference
|
|
|
|
if pvConfig.prebind != nil {
|
|
claimRef = &v1.ObjectReference{
|
|
Name: pvConfig.prebind.Name,
|
|
Namespace: pvConfig.prebind.Namespace,
|
|
}
|
|
}
|
|
|
|
return &v1.PersistentVolume{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
GenerateName: pvConfig.namePrefix,
|
|
Annotations: map[string]string{
|
|
volumehelper.VolumeGidAnnotationKey: "777",
|
|
},
|
|
},
|
|
Spec: v1.PersistentVolumeSpec{
|
|
PersistentVolumeReclaimPolicy: v1.PersistentVolumeReclaimRecycle,
|
|
Capacity: v1.ResourceList{
|
|
v1.ResourceName(v1.ResourceStorage): resource.MustParse("2Gi"),
|
|
},
|
|
PersistentVolumeSource: pvConfig.pvSource,
|
|
AccessModes: []v1.PersistentVolumeAccessMode{
|
|
v1.ReadWriteOnce,
|
|
v1.ReadOnlyMany,
|
|
v1.ReadWriteMany,
|
|
},
|
|
ClaimRef: claimRef,
|
|
},
|
|
}
|
|
}
|
|
|
|
// Returns a PVC definition based on the namespace.
|
|
// Note: if this PVC is intended to be pre-bound to a PV, whose name is not
|
|
// known until the PV is instantiated, then the func createPVPVC will add
|
|
// pvc.Spec.VolumeName to this claim.
|
|
func makePersistentVolumeClaim(ns string) *v1.PersistentVolumeClaim {
|
|
// Specs are expected to match this test's PersistentVolume
|
|
|
|
return &v1.PersistentVolumeClaim{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
GenerateName: "pvc-",
|
|
Namespace: ns,
|
|
Annotations: map[string]string{
|
|
"volume.beta.kubernetes.io/storage-class": "",
|
|
},
|
|
},
|
|
Spec: v1.PersistentVolumeClaimSpec{
|
|
AccessModes: []v1.PersistentVolumeAccessMode{
|
|
v1.ReadWriteOnce,
|
|
v1.ReadOnlyMany,
|
|
v1.ReadWriteMany,
|
|
},
|
|
Resources: v1.ResourceRequirements{
|
|
Requests: v1.ResourceList{
|
|
v1.ResourceName(v1.ResourceStorage): resource.MustParse("1Gi"),
|
|
},
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
// Returns a pod definition based on the namespace. The pod references the PVC's
|
|
// name.
|
|
func makeWritePod(ns string, pvcName string) *v1.Pod {
|
|
return makePod(ns, pvcName, "touch /mnt/SUCCESS && (id -G | grep -E '\\b777\\b')")
|
|
}
|
|
|
|
// Returns a pod definition based on the namespace. The pod references the PVC's
|
|
// name. A slice of BASH commands can be supplied as args to be run by the pod
|
|
func makePod(ns string, pvcName string, command ...string) *v1.Pod {
|
|
|
|
if len(command) == 0 {
|
|
command = []string{"while true; do sleep 1; done"}
|
|
}
|
|
var isPrivileged bool = true
|
|
return &v1.Pod{
|
|
TypeMeta: metav1.TypeMeta{
|
|
Kind: "Pod",
|
|
APIVersion: api.Registry.GroupOrDie(v1.GroupName).GroupVersion.String(),
|
|
},
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
GenerateName: "client-",
|
|
Namespace: ns,
|
|
},
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{
|
|
{
|
|
Name: "write-pod",
|
|
Image: "gcr.io/google_containers/busybox:1.24",
|
|
Command: []string{"/bin/sh", "-c"},
|
|
Args: command,
|
|
VolumeMounts: []v1.VolumeMount{
|
|
{
|
|
Name: pvcName,
|
|
MountPath: "/mnt",
|
|
},
|
|
},
|
|
SecurityContext: &v1.SecurityContext{
|
|
Privileged: &isPrivileged,
|
|
},
|
|
},
|
|
},
|
|
RestartPolicy: v1.RestartPolicyOnFailure,
|
|
Volumes: []v1.Volume{
|
|
{
|
|
Name: pvcName,
|
|
VolumeSource: v1.VolumeSource{
|
|
PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
|
|
ClaimName: pvcName,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
// Define and create a pod with a mounted PV. Pod runs infinite loop until killed.
|
|
func createClientPod(c clientset.Interface, ns string, pvc *v1.PersistentVolumeClaim) *v1.Pod {
|
|
clientPod := makePod(ns, pvc.Name)
|
|
clientPod, err := c.Core().Pods(ns).Create(clientPod)
|
|
Expect(err).NotTo(HaveOccurred())
|
|
|
|
// Verify the pod is running before returning it
|
|
err = framework.WaitForPodRunningInNamespace(c, clientPod)
|
|
Expect(err).NotTo(HaveOccurred())
|
|
clientPod, err = c.Core().Pods(ns).Get(clientPod.Name, metav1.GetOptions{})
|
|
Expect(apierrs.IsNotFound(err)).To(BeFalse())
|
|
return clientPod
|
|
}
|