2f6c4f5eab
All code must use the context from Ginkgo when doing API calls or polling for a change, otherwise the code would not return immediately when the test gets aborted.
449 lines
20 KiB
Go
449 lines
20 KiB
Go
/*
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Copyright 2018 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 testsuites
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import (
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"context"
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"fmt"
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"strings"
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"time"
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"github.com/onsi/ginkgo/v2"
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"github.com/onsi/gomega"
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v1 "k8s.io/api/core/v1"
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storagev1 "k8s.io/api/storage/v1"
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apierrors "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/apis/meta/v1/unstructured"
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"k8s.io/client-go/dynamic"
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clientset "k8s.io/client-go/kubernetes"
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"k8s.io/component-helpers/storage/ephemeral"
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"k8s.io/kubernetes/test/e2e/framework"
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e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
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e2eoutput "k8s.io/kubernetes/test/e2e/framework/pod/output"
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e2epv "k8s.io/kubernetes/test/e2e/framework/pv"
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e2eskipper "k8s.io/kubernetes/test/e2e/framework/skipper"
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e2evolume "k8s.io/kubernetes/test/e2e/framework/volume"
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storageframework "k8s.io/kubernetes/test/e2e/storage/framework"
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storageutils "k8s.io/kubernetes/test/e2e/storage/utils"
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admissionapi "k8s.io/pod-security-admission/api"
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)
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// data file name
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const datapath = "/mnt/test/data"
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type snapshottableTestSuite struct {
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tsInfo storageframework.TestSuiteInfo
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}
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var (
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sDriver storageframework.SnapshottableTestDriver
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dDriver storageframework.DynamicPVTestDriver
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)
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// InitCustomSnapshottableTestSuite returns snapshottableTestSuite that implements TestSuite interface
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// using custom test patterns
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func InitCustomSnapshottableTestSuite(patterns []storageframework.TestPattern) storageframework.TestSuite {
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return &snapshottableTestSuite{
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tsInfo: storageframework.TestSuiteInfo{
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Name: "snapshottable",
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TestPatterns: patterns,
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SupportedSizeRange: e2evolume.SizeRange{
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Min: "1Mi",
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},
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FeatureTag: "[Feature:VolumeSnapshotDataSource]",
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},
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}
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}
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// InitSnapshottableTestSuite returns snapshottableTestSuite that implements TestSuite interface
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// using testsuite default patterns
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func InitSnapshottableTestSuite() storageframework.TestSuite {
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patterns := []storageframework.TestPattern{
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storageframework.DynamicSnapshotDelete,
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storageframework.DynamicSnapshotRetain,
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storageframework.EphemeralSnapshotDelete,
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storageframework.EphemeralSnapshotRetain,
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storageframework.PreprovisionedSnapshotDelete,
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storageframework.PreprovisionedSnapshotRetain,
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}
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return InitCustomSnapshottableTestSuite(patterns)
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}
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func (s *snapshottableTestSuite) GetTestSuiteInfo() storageframework.TestSuiteInfo {
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return s.tsInfo
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}
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func (s *snapshottableTestSuite) SkipUnsupportedTests(driver storageframework.TestDriver, pattern storageframework.TestPattern) {
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// Check preconditions.
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dInfo := driver.GetDriverInfo()
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ok := false
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_, ok = driver.(storageframework.SnapshottableTestDriver)
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if !dInfo.Capabilities[storageframework.CapSnapshotDataSource] || !ok {
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e2eskipper.Skipf("Driver %q does not support snapshots - skipping", dInfo.Name)
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}
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_, ok = driver.(storageframework.DynamicPVTestDriver)
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if !ok {
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e2eskipper.Skipf("Driver %q does not support dynamic provisioning - skipping", driver.GetDriverInfo().Name)
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}
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}
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func (s *snapshottableTestSuite) DefineTests(driver storageframework.TestDriver, pattern storageframework.TestPattern) {
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// Beware that it also registers an AfterEach which renders f unusable. Any code using
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// f must run inside an It or Context callback.
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f := framework.NewDefaultFramework("snapshotting")
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f.NamespacePodSecurityEnforceLevel = admissionapi.LevelPrivileged
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ginkgo.Describe("volume snapshot controller", func() {
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var (
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err error
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config *storageframework.PerTestConfig
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cs clientset.Interface
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dc dynamic.Interface
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pvc *v1.PersistentVolumeClaim
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sc *storagev1.StorageClass
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volumeResource *storageframework.VolumeResource
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pod *v1.Pod
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claimSize string
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originalMntTestData string
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)
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init := func(ctx context.Context) {
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sDriver, _ = driver.(storageframework.SnapshottableTestDriver)
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dDriver, _ = driver.(storageframework.DynamicPVTestDriver)
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// init snap class, create a source PV, PVC, Pod
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cs = f.ClientSet
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dc = f.DynamicClient
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// Now do the more expensive test initialization.
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config = driver.PrepareTest(ctx, f)
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volumeResource = storageframework.CreateVolumeResource(ctx, dDriver, config, pattern, s.GetTestSuiteInfo().SupportedSizeRange)
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ginkgo.DeferCleanup(volumeResource.CleanupResource)
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ginkgo.By("[init] starting a pod to use the claim")
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originalMntTestData = fmt.Sprintf("hello from %s namespace", f.Namespace.Name)
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// After writing data to a file `sync` flushes the data from memory to disk.
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// sync is available in the Linux and Windows versions of agnhost.
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command := fmt.Sprintf("echo '%s' > %s; sync", originalMntTestData, datapath)
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pod = StartInPodWithVolumeSource(ctx, cs, *volumeResource.VolSource, f.Namespace.Name, "pvc-snapshottable-tester", command, config.ClientNodeSelection)
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// At this point a pod is created with a PVC. How to proceed depends on which test is running.
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}
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ginkgo.Context("", func() {
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ginkgo.It("should check snapshot fields, check restore correctly works, check deletion (ephemeral)", func(ctx context.Context) {
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if pattern.VolType != storageframework.GenericEphemeralVolume {
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e2eskipper.Skipf("volume type %q is not ephemeral", pattern.VolType)
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}
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init(ctx)
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// delete the pod at the end of the test
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ginkgo.DeferCleanup(e2epod.DeletePodWithWait, cs, pod)
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// We can test snapshotting of generic
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// ephemeral volumes by creating the snapshot
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// while the pod is running (online). We cannot do it after pod deletion,
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// because then the PVC also gets marked and snapshotting no longer works
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// (even when a finalizer prevents actual removal of the PVC).
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//
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// Because data consistency cannot be
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// guaranteed, this flavor of the test doesn't
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// check the content of the snapshot.
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framework.ExpectNoError(e2epod.WaitForPodSuccessInNamespaceTimeout(ctx, cs, pod.Name, pod.Namespace, f.Timeouts.PodStartSlow))
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pod, err = cs.CoreV1().Pods(pod.Namespace).Get(ctx, pod.Name, metav1.GetOptions{})
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framework.ExpectNoError(err, "check pod after it terminated")
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// Get new copy of the claim
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ginkgo.By("[init] checking the claim")
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pvcName := ephemeral.VolumeClaimName(pod, &pod.Spec.Volumes[0])
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pvcNamespace := pod.Namespace
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parameters := map[string]string{}
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sr := storageframework.CreateSnapshotResource(ctx, sDriver, config, pattern, pvcName, pvcNamespace, f.Timeouts, parameters)
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ginkgo.DeferCleanup(sr.CleanupResource, f.Timeouts)
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err = e2epv.WaitForPersistentVolumeClaimPhase(ctx, v1.ClaimBound, cs, pvcNamespace, pvcName, framework.Poll, f.Timeouts.ClaimProvision)
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framework.ExpectNoError(err)
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pvc, err = cs.CoreV1().PersistentVolumeClaims(pvcNamespace).Get(ctx, pvcName, metav1.GetOptions{})
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framework.ExpectNoError(err, "get PVC")
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claimSize = pvc.Spec.Resources.Requests.Storage().String()
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sc = volumeResource.Sc
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// Get the bound PV
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ginkgo.By("[init] checking the PV")
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_, err := cs.CoreV1().PersistentVolumes().Get(ctx, pvc.Spec.VolumeName, metav1.GetOptions{})
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framework.ExpectNoError(err)
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vs := sr.Vs
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// get the snapshot and check SnapshotContent properties
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vscontent := checkSnapshot(ctx, dc, sr, pattern)
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var restoredPVC *v1.PersistentVolumeClaim
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var restoredPod *v1.Pod
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ginkgo.By("creating a pvc from the snapshot")
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restoredPVC = e2epv.MakePersistentVolumeClaim(e2epv.PersistentVolumeClaimConfig{
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ClaimSize: claimSize,
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StorageClassName: &(sc.Name),
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}, config.Framework.Namespace.Name)
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group := "snapshot.storage.k8s.io"
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restoredPVC.Spec.DataSource = &v1.TypedLocalObjectReference{
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APIGroup: &group,
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Kind: "VolumeSnapshot",
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Name: vs.GetName(),
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}
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ginkgo.By("starting a pod to use the snapshot")
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volSrc := v1.VolumeSource{
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Ephemeral: &v1.EphemeralVolumeSource{
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VolumeClaimTemplate: &v1.PersistentVolumeClaimTemplate{
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Spec: restoredPVC.Spec,
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},
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},
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}
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restoredPod = StartInPodWithVolumeSource(ctx, cs, volSrc, restoredPVC.Namespace, "restored-pvc-tester", "sleep 300", config.ClientNodeSelection)
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ginkgo.DeferCleanup(e2epod.DeletePodWithWait, cs, restoredPod)
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framework.ExpectNoError(e2epod.WaitTimeoutForPodRunningInNamespace(ctx, cs, restoredPod.Name, restoredPod.Namespace, f.Timeouts.PodStartSlow))
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if pattern.VolType != storageframework.GenericEphemeralVolume {
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commands := e2evolume.GenerateReadFileCmd(datapath)
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_, err = e2eoutput.LookForStringInPodExec(restoredPod.Namespace, restoredPod.Name, commands, originalMntTestData, time.Minute)
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framework.ExpectNoError(err)
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}
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ginkgo.By("should delete the VolumeSnapshotContent according to its deletion policy")
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// Delete both Snapshot and restored Pod/PVC at the same time because different storage systems
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// have different ordering of deletion. Some may require delete the restored PVC first before
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// Snapshot deletion and some are opposite.
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err = storageutils.DeleteSnapshotWithoutWaiting(ctx, dc, vs.GetNamespace(), vs.GetName())
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framework.ExpectNoError(err)
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framework.Logf("deleting restored pod %q/%q", restoredPod.Namespace, restoredPod.Name)
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err = cs.CoreV1().Pods(restoredPod.Namespace).Delete(context.TODO(), restoredPod.Name, metav1.DeleteOptions{})
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framework.ExpectNoError(err)
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deleteVolumeSnapshot(ctx, f, dc, sr, pattern, vscontent)
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})
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ginkgo.It("should check snapshot fields, check restore correctly works after modifying source data, check deletion (persistent)", func(ctx context.Context) {
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if pattern.VolType == storageframework.GenericEphemeralVolume {
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e2eskipper.Skipf("volume type %q is ephemeral", pattern.VolType)
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}
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init(ctx)
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pvc = volumeResource.Pvc
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sc = volumeResource.Sc
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// The pod should be in the Success state.
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ginkgo.By("[init] check pod success")
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pod, err = cs.CoreV1().Pods(pod.Namespace).Get(ctx, pod.Name, metav1.GetOptions{})
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framework.ExpectNoError(err, "Failed to fetch pod: %v", err)
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framework.ExpectNoError(e2epod.WaitForPodSuccessInNamespaceTimeout(ctx, cs, pod.Name, pod.Namespace, f.Timeouts.PodStartSlow))
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// Sync the pod to know additional fields.
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pod, err = cs.CoreV1().Pods(pod.Namespace).Get(ctx, pod.Name, metav1.GetOptions{})
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framework.ExpectNoError(err, "Failed to fetch pod: %v", err)
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ginkgo.By("[init] checking the claim")
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err = e2epv.WaitForPersistentVolumeClaimPhase(ctx, v1.ClaimBound, cs, pvc.Namespace, pvc.Name, framework.Poll, f.Timeouts.ClaimProvision)
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framework.ExpectNoError(err)
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// Get new copy of the claim.
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pvc, err = cs.CoreV1().PersistentVolumeClaims(pvc.Namespace).Get(ctx, pvc.Name, metav1.GetOptions{})
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framework.ExpectNoError(err)
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// Get the bound PV.
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ginkgo.By("[init] checking the PV")
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pv, err := cs.CoreV1().PersistentVolumes().Get(ctx, pvc.Spec.VolumeName, metav1.GetOptions{})
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framework.ExpectNoError(err)
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// Delete the pod to force NodeUnpublishVolume (unlike the ephemeral case where the pod is deleted at the end of the test).
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ginkgo.By("[init] deleting the pod")
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StopPod(ctx, cs, pod)
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// At this point we know that:
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// - a pod was created with a PV that's supposed to have data
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//
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// However there's a caching issue that @jinxu97 explained and it's related with the pod & volume
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// lifecycle, to understand it we first analyze what the volumemanager does:
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// - when a pod is delete the volumemanager will try to cleanup the volume mounts
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// - NodeUnpublishVolume: unbinds the bind mount from the container
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// - Linux: the bind mount is removed, which does not flush any cache
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// - Windows: we delete a symlink, data's not flushed yet to disk
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// - NodeUnstageVolume: unmount the global mount
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// - Linux: disk is unmounted and all caches flushed.
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// - Windows: data is flushed to disk and the disk is detached
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//
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// Pod deletion might not guarantee a data flush to disk, however NodeUnstageVolume adds the logic
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// to flush the data to disk (see #81690 for details). We need to wait for NodeUnstageVolume, as
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// NodeUnpublishVolume only removes the bind mount, which doesn't force the caches to flush.
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// It's possible to create empty snapshots if we don't wait (see #101279 for details).
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//
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// In the following code by checking if the PV is not in the node.Status.VolumesInUse field we
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// ensure that the volume is not used by the node anymore (an indicator that NodeUnstageVolume has
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// already finished)
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nodeName := pod.Spec.NodeName
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gomega.Expect(nodeName).NotTo(gomega.BeEmpty(), "pod.Spec.NodeName must not be empty")
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// Snapshot tests are only executed for CSI drivers. When CSI drivers
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// are attached to the node they use VolumeHandle instead of the pv.Name.
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volumeName := pv.Spec.PersistentVolumeSource.CSI.VolumeHandle
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ginkgo.By(fmt.Sprintf("[init] waiting until the node=%s is not using the volume=%s", nodeName, volumeName))
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success := storageutils.WaitUntil(framework.Poll, f.Timeouts.PVDelete, func() bool {
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node, err := cs.CoreV1().Nodes().Get(ctx, nodeName, metav1.GetOptions{})
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framework.ExpectNoError(err)
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volumesInUse := node.Status.VolumesInUse
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framework.Logf("current volumes in use: %+v", volumesInUse)
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for i := 0; i < len(volumesInUse); i++ {
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if strings.HasSuffix(string(volumesInUse[i]), volumeName) {
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return false
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}
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}
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return true
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})
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if !success {
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framework.Failf("timed out waiting for node=%s to not use the volume=%s", nodeName, volumeName)
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}
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// Take the snapshot.
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parameters := map[string]string{}
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sr := storageframework.CreateSnapshotResource(ctx, sDriver, config, pattern, pvc.Name, pvc.Namespace, f.Timeouts, parameters)
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ginkgo.DeferCleanup(sr.CleanupResource, f.Timeouts)
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vs := sr.Vs
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// get the snapshot and check SnapshotContent properties
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vscontent := checkSnapshot(ctx, dc, sr, pattern)
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ginkgo.By("Modifying source data test")
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var restoredPVC *v1.PersistentVolumeClaim
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var restoredPod *v1.Pod
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modifiedMntTestData := fmt.Sprintf("modified data from %s namespace", pvc.GetNamespace())
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ginkgo.By("modifying the data in the source PVC")
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// After writing data to a file `sync` flushes the data from memory to disk.
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// sync is available in the Linux and Windows versions of agnhost.
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command := fmt.Sprintf("echo '%s' > %s; sync", modifiedMntTestData, datapath)
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RunInPodWithVolume(ctx, cs, f.Timeouts, pvc.Namespace, pvc.Name, "pvc-snapshottable-data-tester", command, config.ClientNodeSelection)
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ginkgo.By("creating a pvc from the snapshot")
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claimSize = pvc.Spec.Resources.Requests.Storage().String()
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restoredPVC = e2epv.MakePersistentVolumeClaim(e2epv.PersistentVolumeClaimConfig{
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ClaimSize: claimSize,
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StorageClassName: &(sc.Name),
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}, config.Framework.Namespace.Name)
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group := "snapshot.storage.k8s.io"
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restoredPVC.Spec.DataSource = &v1.TypedLocalObjectReference{
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APIGroup: &group,
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Kind: "VolumeSnapshot",
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Name: vs.GetName(),
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}
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restoredPVC, err = cs.CoreV1().PersistentVolumeClaims(restoredPVC.Namespace).Create(ctx, restoredPVC, metav1.CreateOptions{})
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framework.ExpectNoError(err)
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ginkgo.DeferCleanup(func(ctx context.Context) {
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framework.Logf("deleting claim %q/%q", restoredPVC.Namespace, restoredPVC.Name)
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// typically this claim has already been deleted
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err = cs.CoreV1().PersistentVolumeClaims(restoredPVC.Namespace).Delete(ctx, restoredPVC.Name, metav1.DeleteOptions{})
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if err != nil && !apierrors.IsNotFound(err) {
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framework.Failf("Error deleting claim %q. Error: %v", restoredPVC.Name, err)
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}
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})
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ginkgo.By("starting a pod to use the snapshot")
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restoredPod = StartInPodWithVolume(ctx, cs, restoredPVC.Namespace, restoredPVC.Name, "restored-pvc-tester", "sleep 300", config.ClientNodeSelection)
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ginkgo.DeferCleanup(StopPod, cs, restoredPod)
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framework.ExpectNoError(e2epod.WaitTimeoutForPodRunningInNamespace(ctx, cs, restoredPod.Name, restoredPod.Namespace, f.Timeouts.PodStartSlow))
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commands := e2evolume.GenerateReadFileCmd(datapath)
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_, err = e2eoutput.LookForStringInPodExec(restoredPod.Namespace, restoredPod.Name, commands, originalMntTestData, time.Minute)
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framework.ExpectNoError(err)
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ginkgo.By("should delete the VolumeSnapshotContent according to its deletion policy")
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// Delete both Snapshot and restored Pod/PVC at the same time because different storage systems
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// have different ordering of deletion. Some may require delete the restored PVC first before
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// Snapshot deletion and some are opposite.
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err = storageutils.DeleteSnapshotWithoutWaiting(ctx, dc, vs.GetNamespace(), vs.GetName())
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framework.ExpectNoError(err)
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framework.Logf("deleting restored pod %q/%q", restoredPod.Namespace, restoredPod.Name)
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err = cs.CoreV1().Pods(restoredPod.Namespace).Delete(ctx, restoredPod.Name, metav1.DeleteOptions{})
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framework.ExpectNoError(err)
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framework.Logf("deleting restored PVC %q/%q", restoredPVC.Namespace, restoredPVC.Name)
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err = cs.CoreV1().PersistentVolumeClaims(restoredPVC.Namespace).Delete(ctx, restoredPVC.Name, metav1.DeleteOptions{})
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framework.ExpectNoError(err)
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deleteVolumeSnapshot(ctx, f, dc, sr, pattern, vscontent)
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})
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})
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})
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}
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func deleteVolumeSnapshot(ctx context.Context, f *framework.Framework, dc dynamic.Interface, sr *storageframework.SnapshotResource, pattern storageframework.TestPattern, vscontent *unstructured.Unstructured) {
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vs := sr.Vs
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// Wait for the Snapshot to be actually deleted from API server
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err := storageutils.WaitForNamespacedGVRDeletion(ctx, dc, storageutils.SnapshotGVR, vs.GetNamespace(), vs.GetNamespace(), framework.Poll, f.Timeouts.SnapshotDelete)
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framework.ExpectNoError(err)
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switch pattern.SnapshotDeletionPolicy {
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case storageframework.DeleteSnapshot:
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ginkgo.By("checking the SnapshotContent has been deleted")
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err = storageutils.WaitForGVRDeletion(ctx, dc, storageutils.SnapshotContentGVR, vscontent.GetName(), framework.Poll, f.Timeouts.SnapshotDelete)
|
|
framework.ExpectNoError(err)
|
|
case storageframework.RetainSnapshot:
|
|
ginkgo.By("checking the SnapshotContent has not been deleted")
|
|
err = storageutils.WaitForGVRDeletion(ctx, dc, storageutils.SnapshotContentGVR, vscontent.GetName(), 1*time.Second /* poll */, 30*time.Second /* timeout */)
|
|
framework.ExpectError(err)
|
|
}
|
|
}
|
|
|
|
func checkSnapshot(ctx context.Context, dc dynamic.Interface, sr *storageframework.SnapshotResource, pattern storageframework.TestPattern) *unstructured.Unstructured {
|
|
vs := sr.Vs
|
|
vsc := sr.Vsclass
|
|
|
|
// Get new copy of the snapshot
|
|
ginkgo.By("checking the snapshot")
|
|
vs, err := dc.Resource(storageutils.SnapshotGVR).Namespace(vs.GetNamespace()).Get(ctx, vs.GetName(), metav1.GetOptions{})
|
|
framework.ExpectNoError(err)
|
|
|
|
// Get the bound snapshotContent
|
|
snapshotStatus := vs.Object["status"].(map[string]interface{})
|
|
snapshotContentName := snapshotStatus["boundVolumeSnapshotContentName"].(string)
|
|
vscontent, err := dc.Resource(storageutils.SnapshotContentGVR).Get(ctx, snapshotContentName, metav1.GetOptions{})
|
|
framework.ExpectNoError(err)
|
|
|
|
snapshotContentSpec := vscontent.Object["spec"].(map[string]interface{})
|
|
volumeSnapshotRef := snapshotContentSpec["volumeSnapshotRef"].(map[string]interface{})
|
|
|
|
// Check SnapshotContent properties
|
|
ginkgo.By("checking the SnapshotContent")
|
|
// PreprovisionedCreatedSnapshot do not need to set volume snapshot class name
|
|
if pattern.SnapshotType != storageframework.PreprovisionedCreatedSnapshot {
|
|
framework.ExpectEqual(snapshotContentSpec["volumeSnapshotClassName"], vsc.GetName())
|
|
}
|
|
framework.ExpectEqual(volumeSnapshotRef["name"], vs.GetName())
|
|
framework.ExpectEqual(volumeSnapshotRef["namespace"], vs.GetNamespace())
|
|
return vscontent
|
|
}
|