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e2e: retry getting Pods before executing commands

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On occasion the Pods have not been (re)started before they get listed.
This can result in an empty list. It can occur during RBD testing where
Pods are restarted before `uname` is executed. In case the Pods are not
available yet, the test will fail with the "podlist is empty" error.

By adding a retry when the list of Pods is empty, the tests should
become a little more stable.

Signed-off-by: Niels de Vos <ndevos@redhat.com>
This commit is contained in:
Niels de Vos 2022-04-28 10:35:34 +02:00 committed by mergify[bot]
parent 9f08cb7ea0
commit bfef0279a7
1 changed files with 24 additions and 6 deletions
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30
e2e/pod.go
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@ -91,13 +91,31 @@ func waitForDaemonSets(name, ns string, c kubernetes.Interface, t int) error {
}
func findPodAndContainerName(f *framework.Framework, ns, cn string, opt *metav1.ListOptions) (string, string, error) {
podList, err := f.PodClientNS(ns).List(context.TODO(), *opt)
if err != nil {
return "", "", err
}
timeout := time.Duration(deployTimeout) * time.Minute
if len(podList.Items) == 0 {
return "", "", errors.New("podlist is empty")
var (
podList *v1.PodList
listErr error
)
err := wait.PollImmediate(poll, timeout, func() (bool, error) {
podList, listErr = f.PodClientNS(ns).List(context.TODO(), *opt)
if listErr != nil {
if isRetryableAPIError(listErr) {
return false, nil
}
return false, fmt.Errorf("failed to list Pods: %w", listErr)
}
if len(podList.Items) == 0 {
// retry in case the pods have not been (re)started yet
return false, nil
}
return true, nil
})
if err != nil {
return "", "", fmt.Errorf("failed to find pod for %v: %w", opt, err)
}
if cn != "" {