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test: Add node e2e test to verify static pod termination

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Add node e2e test to verify that static pods can be started after a
previous static pod with the same config temporarily failed termination.

The scenario is:

1. Static pod is started
2. Static pod is deleted
3. Static pod termination fails (internally `syncTerminatedPod` fails)
4. At later time, pod termination should succeed
5. New static pod with the same config is (re)-added
6. New static pod is expected to start successfully

To repro this scenario, setup a pod using a NFS mount. The NFS server is
stopped which will result in volumes failing to unmount and
`syncTerminatedPod` to fail. The NFS server is later started, allowing
the volume to unmount successfully.

xref:

1. https://github.com/kubernetes/kubernetes/pull/113145#issuecomment-1289587988
2. https://github.com/kubernetes/kubernetes/pull/113065
3. https://github.com/kubernetes/kubernetes/pull/113093

Signed-off-by: David Porter <david@porter.me>
This commit is contained in:
David Porter
2022-11-01 16:53:12 -07:00
committed by Clayton Coleman
parent 1c75c2cda8
commit c5a1f0188b
4 changed files with 197 additions and 13 deletions
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12
test/e2e_node/remote/node_e2e.go
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@@ -87,15 +87,6 @@ func (n *NodeE2ERemote) SetupTestPackage(tardir, systemSpecName string) error {
return nil
}
// prependCOSMounterFlag prepends the flag for setting the GCI mounter path to
// args and returns the result.
func prependCOSMounterFlag(args, host, workspace string) (string, error) {
klog.V(2).Infof("GCI/COS node and GCI/COS mounter both detected, modifying --experimental-mounter-path accordingly")
mounterPath := filepath.Join(workspace, "mounter")
args = fmt.Sprintf("--kubelet-flags=--experimental-mounter-path=%s ", mounterPath) + args
return args, nil
}
// prependMemcgNotificationFlag prepends the flag for enabling memcg
// notification to args and returns the result.
func prependMemcgNotificationFlag(args string) string {
@@ -124,8 +115,7 @@ func osSpecificActions(args, host, workspace string) (string, error) {
return args, setKubeletSELinuxLabels(host, workspace)
case strings.Contains(output, "gci"), strings.Contains(output, "cos"):
args = prependMemcgNotificationFlag(args)
args = prependGCPCredentialProviderFlag(args, workspace)
return prependCOSMounterFlag(args, host, workspace)
return prependGCPCredentialProviderFlag(args, workspace), nil
case strings.Contains(output, "ubuntu"):
args = prependGCPCredentialProviderFlag(args, workspace)
return prependMemcgNotificationFlag(args), nil