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flexvolume_online_resize.go
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flexvolume_online_resize.go
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/*
Copyright 2018 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package storage
import (
"context"
"fmt"
"path"
"github.com/onsi/ginkgo/v2"
"github.com/onsi/gomega"
v1 "k8s.io/api/core/v1"
storagev1 "k8s.io/api/storage/v1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
utilerrors "k8s.io/apimachinery/pkg/util/errors"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/kubernetes/test/e2e/framework"
e2enode "k8s.io/kubernetes/test/e2e/framework/node"
e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
e2epv "k8s.io/kubernetes/test/e2e/framework/pv"
e2eskipper "k8s.io/kubernetes/test/e2e/framework/skipper"
"k8s.io/kubernetes/test/e2e/storage/testsuites"
"k8s.io/kubernetes/test/e2e/storage/utils"
imageutils "k8s.io/kubernetes/test/utils/image"
admissionapi "k8s.io/pod-security-admission/api"
)
var _ = utils.SIGDescribe("[Feature:Flexvolumes] Mounted flexvolume volume expand [Slow]", func() {
var (
c clientset.Interface
ns string
err error
pvc *v1.PersistentVolumeClaim
resizableSc *storagev1.StorageClass
nodeName string
nodeKeyValueLabel map[string]string
nodeLabelValue string
nodeKey string
node *v1.Node
)
f := framework.NewDefaultFramework("mounted-flexvolume-expand")
f.NamespacePodSecurityLevel = admissionapi.LevelPrivileged
ginkgo.BeforeEach(func(ctx context.Context) {
e2eskipper.SkipUnlessProviderIs("aws", "gce", "local")
e2eskipper.SkipUnlessMasterOSDistroIs("debian", "ubuntu", "gci", "custom")
e2eskipper.SkipUnlessNodeOSDistroIs("debian", "ubuntu", "gci", "custom")
e2eskipper.SkipUnlessSSHKeyPresent()
c = f.ClientSet
ns = f.Namespace.Name
framework.ExpectNoError(e2enode.WaitForAllNodesSchedulable(ctx, c, f.Timeouts.NodeSchedulable))
var err error
node, err = e2enode.GetRandomReadySchedulableNode(ctx, f.ClientSet)
framework.ExpectNoError(err)
nodeName = node.Name
nodeKey = "mounted_flexvolume_expand_" + ns
nodeLabelValue = ns
nodeKeyValueLabel = map[string]string{nodeKey: nodeLabelValue}
e2enode.AddOrUpdateLabelOnNode(c, nodeName, nodeKey, nodeLabelValue)
ginkgo.DeferCleanup(e2enode.RemoveLabelOffNode, c, nodeName, nodeKey)
test := testsuites.StorageClassTest{
Name: "flexvolume-resize",
Timeouts: f.Timeouts,
ClaimSize: "2Gi",
AllowVolumeExpansion: true,
Provisioner: "flex-expand",
}
resizableSc, err = c.StorageV1().StorageClasses().Create(ctx, newStorageClass(test, ns, "resizing"), metav1.CreateOptions{})
if err != nil {
fmt.Printf("storage class creation error: %v\n", err)
}
framework.ExpectNoError(err, "Error creating resizable storage class: %v", err)
if !*resizableSc.AllowVolumeExpansion {
framework.Failf("Class %s does not allow volume expansion", resizableSc.Name)
}
pvc = e2epv.MakePersistentVolumeClaim(e2epv.PersistentVolumeClaimConfig{
StorageClassName: &(resizableSc.Name),
ClaimSize: "2Gi",
}, ns)
pvc, err = c.CoreV1().PersistentVolumeClaims(pvc.Namespace).Create(ctx, pvc, metav1.CreateOptions{})
framework.ExpectNoError(err, "Error creating pvc: %v", err)
ginkgo.DeferCleanup(func(ctx context.Context) {
framework.Logf("AfterEach: Cleaning up resources for mounted volume resize")
if errs := e2epv.PVPVCCleanup(ctx, c, ns, nil, pvc); len(errs) > 0 {
framework.Failf("AfterEach: Failed to delete PVC and/or PV. Errors: %v", utilerrors.NewAggregate(errs))
}
})
})
ginkgo.It("should be resizable when mounted", func(ctx context.Context) {
e2eskipper.SkipUnlessSSHKeyPresent()
driver := "dummy-attachable"
ginkgo.By(fmt.Sprintf("installing flexvolume %s on node %s as %s", path.Join(driverDir, driver), node.Name, driver))
installFlex(ctx, c, node, "k8s", driver, path.Join(driverDir, driver))
ginkgo.By(fmt.Sprintf("installing flexvolume %s on (master) node %s as %s", path.Join(driverDir, driver), node.Name, driver))
installFlex(ctx, c, nil, "k8s", driver, path.Join(driverDir, driver))
pv := e2epv.MakePersistentVolume(e2epv.PersistentVolumeConfig{
PVSource: v1.PersistentVolumeSource{
FlexVolume: &v1.FlexPersistentVolumeSource{
Driver: "k8s/" + driver,
}},
NamePrefix: "pv-",
StorageClassName: resizableSc.Name,
VolumeMode: pvc.Spec.VolumeMode,
})
_, err = e2epv.CreatePV(ctx, c, f.Timeouts, pv)
framework.ExpectNoError(err, "Error creating pv %v", err)
ginkgo.By("Waiting for PVC to be in bound phase")
pvcClaims := []*v1.PersistentVolumeClaim{pvc}
var pvs []*v1.PersistentVolume
pvs, err = e2epv.WaitForPVClaimBoundPhase(ctx, c, pvcClaims, framework.ClaimProvisionTimeout)
framework.ExpectNoError(err, "Failed waiting for PVC to be bound %v", err)
framework.ExpectEqual(len(pvs), 1)
var pod *v1.Pod
ginkgo.By("Creating pod")
pod, err = createNginxPod(ctx, c, ns, nodeKeyValueLabel, pvcClaims)
framework.ExpectNoError(err, "Failed to create pod %v", err)
ginkgo.DeferCleanup(e2epod.DeletePodWithWait, c, pod)
ginkgo.By("Waiting for pod to go to 'running' state")
err = e2epod.WaitForPodNameRunningInNamespace(ctx, f.ClientSet, pod.ObjectMeta.Name, f.Namespace.Name)
framework.ExpectNoError(err, "Pod didn't go to 'running' state %v", err)
ginkgo.By("Expanding current pvc")
newSize := resource.MustParse("6Gi")
newPVC, err := testsuites.ExpandPVCSize(ctx, pvc, newSize, c)
framework.ExpectNoError(err, "While updating pvc for more size")
pvc = newPVC
gomega.Expect(pvc).NotTo(gomega.BeNil())
pvcSize := pvc.Spec.Resources.Requests[v1.ResourceStorage]
if pvcSize.Cmp(newSize) != 0 {
framework.Failf("error updating pvc size %q", pvc.Name)
}
ginkgo.By("Waiting for cloudprovider resize to finish")
err = testsuites.WaitForControllerVolumeResize(ctx, pvc, c, totalResizeWaitPeriod)
framework.ExpectNoError(err, "While waiting for pvc resize to finish")
ginkgo.By("Waiting for file system resize to finish")
pvc, err = testsuites.WaitForFSResize(ctx, pvc, c)
framework.ExpectNoError(err, "while waiting for fs resize to finish")
pvcConditions := pvc.Status.Conditions
framework.ExpectEqual(len(pvcConditions), 0, "pvc should not have conditions")
})
})
// createNginxPod creates an nginx pod.
func createNginxPod(ctx context.Context, client clientset.Interface, namespace string, nodeSelector map[string]string, pvclaims []*v1.PersistentVolumeClaim) (*v1.Pod, error) {
pod := makeNginxPod(namespace, nodeSelector, pvclaims)
pod, err := client.CoreV1().Pods(namespace).Create(ctx, pod, metav1.CreateOptions{})
if err != nil {
return nil, fmt.Errorf("pod Create API error: %w", err)
}
// Waiting for pod to be running
err = e2epod.WaitForPodNameRunningInNamespace(ctx, client, pod.Name, namespace)
if err != nil {
return pod, fmt.Errorf("pod %q is not Running: %w", pod.Name, err)
}
// get fresh pod info
pod, err = client.CoreV1().Pods(namespace).Get(ctx, pod.Name, metav1.GetOptions{})
if err != nil {
return pod, fmt.Errorf("pod Get API error: %w", err)
}
return pod, nil
}
// makeNginxPod returns a pod definition based on the namespace using nginx image
func makeNginxPod(ns string, nodeSelector map[string]string, pvclaims []*v1.PersistentVolumeClaim) *v1.Pod {
podSpec := &v1.Pod{
TypeMeta: metav1.TypeMeta{
Kind: "Pod",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
GenerateName: "pvc-tester-",
Namespace: ns,
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: "write-pod",
Image: imageutils.GetE2EImage(imageutils.Nginx),
Ports: []v1.ContainerPort{
{
Name: "http-server",
ContainerPort: 80,
},
},
},
},
},
}
var volumeMounts = make([]v1.VolumeMount, len(pvclaims))
var volumes = make([]v1.Volume, len(pvclaims))
for index, pvclaim := range pvclaims {
volumename := fmt.Sprintf("volume%v", index+1)
volumeMounts[index] = v1.VolumeMount{Name: volumename, MountPath: "/mnt/" + volumename}
volumes[index] = v1.Volume{Name: volumename, VolumeSource: v1.VolumeSource{PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{ClaimName: pvclaim.Name, ReadOnly: false}}}
}
podSpec.Spec.Containers[0].VolumeMounts = volumeMounts
podSpec.Spec.Volumes = volumes
if nodeSelector != nil {
podSpec.Spec.NodeSelector = nodeSelector
}
return podSpec
}