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node: e2e: docs and fix for teardownSRIOVConfig

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Document why teardownSRIOVPod has to wait for all the containers
to be gone before to end, and why is important.

Additionally, change the code to wait for all the containers to be gone,
not just the first. This is both a little cleaner and a little safer,
even though it seems the current code caused no issues so far.

Signed-off-by: Francesco Romani <fromani@redhat.com>
This commit is contained in:
Francesco Romani 2020-11-02 08:54:13 +01:00
parent adfff27279
commit 16d5ac3689
1 changed files with 6 additions and 1 deletions
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7
test/e2e_node/topology_manager_test.go
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@ -391,6 +391,11 @@ func runTopologyManagerPolicySuiteTests(f *framework.Framework) {
runMultipleGuPods(f)
}
// waitForAllContainerRemoval waits until all the containers on a given pod are really gone.
// This is needed by the e2e tests which involve exclusive resource allocation (cpu, topology manager; podresources; etc.)
// In these cases, we need to make sure the tests clean up after themselves to make sure each test runs in
// a pristine environment. The only way known so far to do that is to introduce this wait.
// Worth noting, however, that this makes the test runtime much bigger.
func waitForAllContainerRemoval(podName, podNS string) {
rs, _, err := getCRIClient()
framework.ExpectNoError(err)
@ -569,7 +574,7 @@ func teardownSRIOVConfigOrFail(f *framework.Framework, sd *sriovData) {
ginkgo.By(fmt.Sprintf("Delete SRIOV device plugin pod %s/%s", sd.pod.Namespace, sd.pod.Name))
err = f.ClientSet.CoreV1().Pods(sd.pod.Namespace).Delete(context.TODO(), sd.pod.Name, deleteOptions)
framework.ExpectNoError(err)
waitForContainerRemoval(sd.pod.Spec.Containers[0].Name, sd.pod.Name, sd.pod.Namespace)
waitForAllContainerRemoval(sd.pod.Name, sd.pod.Namespace)
ginkgo.By(fmt.Sprintf("Deleting configMap %v/%v", metav1.NamespaceSystem, sd.configMap.Name))
err = f.ClientSet.CoreV1().ConfigMaps(metav1.NamespaceSystem).Delete(context.TODO(), sd.configMap.Name, deleteOptions)