Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

[ISSUE-1051] Handle Kubelet's Wrong CSI Call Inconsistent with Real Volume Status #1050

Open
wants to merge 14 commits into
base: master
Choose a base branch
from
Open

[ISSUE-1051] Handle Kubelet's Wrong CSI Call Inconsistent with Real Volume Status #1050

Show file tree
Hide file tree
Changes from 7 commits
Commits
Show all changes
14 commits
Select commit Hold shift + click to select a range
5f071d6
for NodeUnstage/NodePublish/NodeUnpublish, also need to retry on Fail…
CraneShiEMC Aug 26, 2023
2e6ab7f
fix lint error
CraneShiEMC Aug 26, 2023
fdc5970
fix UT
CraneShiEMC Aug 26, 2023
a50a7f1
add UT
CraneShiEMC Aug 26, 2023
bfb1d98
add UT
CraneShiEMC Aug 26, 2023
1a77d43
Redo NodeStageVolume if srcPath is not mounted
CraneShiEMC Aug 26, 2023
d36e785
correct stagingTargetPath
CraneShiEMC Aug 26, 2023
4376b10
add warning log for redo NodeStageVolume
CraneShiEMC Aug 27, 2023
c835b96
fix that, in multi-pod case, successful unpublish volume cannot resum…
CraneShiEMC Aug 27, 2023
a3abfb9
unlock volume to redo NodeStageVolume if applicable in NodePublishVolume
CraneShiEMC Aug 27, 2023
af81d9a
fix issue of outdated volume
CraneShiEMC Aug 27, 2023
7ecd953
fix and add UT
CraneShiEMC Aug 28, 2023
330960f
add UT
CraneShiEMC Aug 28, 2023
5a36eea
Merge branch 'master' into bugfix-retry-failed-volume
CraneShiEMC Dec 20, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
40 changes: 34 additions & 6 deletions pkg/node/node.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -353,10 +353,15 @@ func (s *CSINodeService) NodeUnstageVolume(ctx context.Context, req *csi.NodeUns
}

currStatus := volumeCR.Spec.CSIStatus
if currStatus == apiV1.Created {
switch currStatus {
case apiV1.Failed:
ll.Warningf("Volume status: %s. Need to retry.", currStatus)
case apiV1.Created:
ll.Info("Volume has been already unstaged")
return &csi.NodeUnstageVolumeResponse{}, nil
} else if currStatus != apiV1.VolumeReady {
case apiV1.VolumeReady:
ll.Infof("Expected volume status: %s", currStatus)
default:
msg := fmt.Sprintf("current volume CR status - %s, expected to be in [%s, %s]",
currStatus, apiV1.Created, apiV1.VolumeReady)
ll.Error(msg)
Expand Down Expand Up @@ -468,8 +473,9 @@ func (s *CSINodeService) NodePublishVolume(ctx context.Context, req *csi.NodePub
}

currStatus := volumeCR.Spec.CSIStatus
// if currStatus not in [VolumeReady, Published]
if currStatus != apiV1.VolumeReady && currStatus != apiV1.Published {
if currStatus == apiV1.Failed {
ll.Warningf("Volume status: %s. Need to retry.", currStatus)
} else if currStatus != apiV1.VolumeReady && currStatus != apiV1.Published {
msg := fmt.Sprintf("current volume CR status - %s, expected to be in [%s, %s]",
currStatus, apiV1.VolumeReady, apiV1.Published)
ll.Error(msg)
Expand All @@ -488,6 +494,27 @@ func (s *CSINodeService) NodePublishVolume(ctx context.Context, req *csi.NodePub
resp, errToReturn = nil, fmt.Errorf("failed to publish volume: fake attach error %s", err.Error())
}
} else {
// will check whether srcPath is mounted, if not, need to redo NodeStageVolume
Copy link
Collaborator

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I am a little concerned about this process, as some mount logic(like global path setup) is done in kubelet. there redo nodeStage may not help in such case. do we have a test can prove that this will help in the failure case?

Copy link
Collaborator Author

@CraneShiEMC CraneShiEMC Aug 27, 2023 •
edited
Loading

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

The kubelet issued wrong CSI call NodePublishVolume in this case assumed that the volume's device global path's mountpoint has been successfully setup in some successful previous CSI call NodeStageVolume. But acutally the volume's device global path has been unmounted in the possible forceful node-removal and kubelet cannot successfully sync the volume's real status because of its continually-failed "orphan" pod's volume cleanup by calling CSI NodeUnpublish when CSI pods have not been intialized yet.

In spite of this, the device global path still exists there if the volume still exists in the most cases. Even though the device global path has also been removed in the worst case, CSI current logic can still create the device global path itself.

I will do the functional test on this code change to verify it.

Copy link
Collaborator Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I've similuated the scenario of volume's k8s global device mountpoint missing in my standalone test. This CSI defensive enhancement can work well as expected in the test.

srcMounted, err := s.fsOps.IsMounted(srcPath)
if err != nil {
errMsg := fmt.Sprintf("execute IsMounted on %s with error: %s", srcPath, err.Error())
ll.Error(errMsg)
return nil, fmt.Errorf("failed to publish volume: %s", errMsg)
}
if !srcMounted {
nodeStageReq := &csi.NodeStageVolumeRequest{
VolumeId: volumeID,
StagingTargetPath: req.GetStagingTargetPath(),
VolumeCapability: req.GetVolumeCapability(),
}
nodeStageResp, err := s.NodeStageVolume(ctx, nodeStageReq)
if nodeStageResp == nil && err != nil {
errMsg := fmt.Sprintf("redo NodeStageVolume on volume %s with error: %s", volumeID, err.Error())
ll.Error(errMsg)
return nil, fmt.Errorf("failed to publish volume: %s", errMsg)
}
}

_, isBlock := req.GetVolumeCapability().GetAccessType().(*csi.VolumeCapability_Block)
if err := s.fsOps.PrepareAndPerformMount(srcPath, dstPath, isBlock, !isBlock, mountOptions...); err != nil {
ll.Errorf("Unable to mount volume: %v", err)
Expand Down Expand Up @@ -554,8 +581,9 @@ func (s *CSINodeService) NodeUnpublishVolume(ctx context.Context, req *csi.NodeU
}

currStatus := volumeCR.Spec.CSIStatus
// if currStatus not in [VolumeReady, Published]
if currStatus != apiV1.VolumeReady && currStatus != apiV1.Published {
if currStatus == apiV1.Failed {
ll.Warningf("Volume status: %s. Need to retry.", currStatus)
} else if currStatus != apiV1.VolumeReady && currStatus != apiV1.Published {
msg := fmt.Sprintf("current volume CR status - %s, expected to be in [%s, %s]",
currStatus, apiV1.VolumeReady, apiV1.Published)
ll.Error(msg)
Expand Down
38 changes: 33 additions & 5 deletions pkg/node/node_test.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -101,7 +101,9 @@ var _ = Describe("CSINodeService NodePublish()", func() {
Expect(err).To(BeNil())
Expect(volumeCR.Spec.Owners[0]).To(Equal(testPod1Name))

// publish again such volume
// publish again such volume in Failed Status
volumeCR.Spec.CSIStatus = apiV1.Failed
err = node.k8sClient.UpdateCR(testCtx, volumeCR)
resp, err = node.NodePublishVolume(testCtx, req)
Expect(resp).NotTo(BeNil())
Expect(err).To(BeNil())
Expand All @@ -111,6 +113,7 @@ var _ = Describe("CSINodeService NodePublish()", func() {
err = node.k8sClient.ReadCR(testCtx, testV1ID, "", volumeCR)
Expect(err).To(BeNil())
Expect(len(volumeCR.Spec.Owners)).To(Equal(1))
Expect(volumeCR.Spec.CSIStatus).To(Equal(apiV1.Published))
})
})

Expand Down Expand Up @@ -157,12 +160,12 @@ var _ = Describe("CSINodeService NodePublish()", func() {
Expect(err).NotTo(BeNil())
Expect(err.Error()).To(ContainSubstring("Staging Path missing in request"))
})
It("Should fail, because Volume has failed status", func() {
It("Should fail, because Volume has unexpected status", func() {
req := getNodePublishRequest(testV1ID, targetPath, *testVolumeCap)
vol1 := &vcrd.Volume{}
err := node.k8sClient.ReadCR(testCtx, testVolume1.Id, testNs, vol1)
Expect(err).To(BeNil())
vol1.Spec.CSIStatus = apiV1.Failed
vol1.Spec.CSIStatus = apiV1.Creating
err = node.k8sClient.UpdateCR(testCtx, vol1)
Expect(err).To(BeNil())

Expand Down Expand Up @@ -364,6 +367,19 @@ var _ = Describe("CSINodeService NodeUnPublish()", func() {
Expect(err).To(BeNil())
Expect(volumeCR.Spec.CSIStatus).To(Equal(apiV1.VolumeReady))
Expect(volumeCR.Spec.Owners).To(BeNil())

// unpublish again on failed volume
volumeCR.Spec.CSIStatus = apiV1.Failed
err = node.k8sClient.UpdateCR(testCtx, volumeCR)
Expect(err).To(BeNil())

resp, err = node.NodeUnpublishVolume(testCtx, req)
Expect(resp).NotTo(BeNil())
Expect(err).To(BeNil())

err = node.k8sClient.ReadCR(testCtx, testV1ID, "", volumeCR)
Expect(err).To(BeNil())
Expect(volumeCR.Spec.CSIStatus).To(Equal(apiV1.VolumeReady))
})
It("Should unpublish volume and don't change volume CR status", func() {
req := getNodeUnpublishRequest(testV1ID, targetPath1)
Expand Down Expand Up @@ -506,6 +522,18 @@ var _ = Describe("CSINodeService NodeUnStage()", func() {
err = node.k8sClient.ReadCR(testCtx, testV1ID, "", volumeCR)
Expect(err).To(BeNil())
Expect(volumeCR.Spec.CSIStatus).To(Equal(apiV1.Created))

// retry unstage on failed volume
volumeCR.Spec.CSIStatus = apiV1.Failed
err = node.k8sClient.UpdateCR(testCtx, volumeCR)
Expect(err).To(BeNil())
resp, err = node.NodeUnstageVolume(testCtx, req)
Expect(resp).NotTo(BeNil())
Expect(err).To(BeNil())

err = node.k8sClient.ReadCR(testCtx, testV1ID, "", volumeCR)
Expect(err).To(BeNil())
Expect(volumeCR.Spec.CSIStatus).To(Equal(apiV1.Created))
})
})

Expand Down Expand Up @@ -564,12 +592,12 @@ var _ = Describe("CSINodeService NodeUnStage()", func() {
Expect(volumeCR.Spec.CSIStatus).To(Equal(apiV1.Failed))
})

It("Should failed, because Volume has failed status", func() {
It("Should failed, because Volume has unexpected status", func() {
req := getNodeUnstageRequest(testV1ID, targetPath)
vol1 := &vcrd.Volume{}
err := node.k8sClient.ReadCR(testCtx, testVolume1.Id, testNs, vol1)
Expect(err).To(BeNil())
vol1.Spec.CSIStatus = apiV1.Failed
vol1.Spec.CSIStatus = apiV1.Creating
err = node.k8sClient.UpdateCR(testCtx, vol1)
Expect(err).To(BeNil())

Expand Down
Loading