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e2e: Wait for kube-root-ca.crt to be created

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The change from service account secrets to projected tokens and
the new dependency on kube-root-ca.crt to start pods with those
projected tokens means that e2e tests can start before
kube-root-ca.crt is created in a namespace. Wait for the default
service account AND the kube-root-ca.crt configmap in normal
e2e tests.
This commit is contained in:
Clayton Coleman 2022-01-25 13:11:52 -05:00
parent 804630ed24
commit 1608fc5e88
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2 changed files with 36 additions and 0 deletions
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3
test/e2e/framework/framework.go
View File

@ -248,6 +248,9 @@ func (f *Framework) BeforeEach() {
ginkgo.By("Waiting for a default service account to be provisioned in namespace")
err = WaitForDefaultServiceAccountInNamespace(f.ClientSet, namespace.Name)
ExpectNoError(err)
ginkgo.By("Waiting for kube-root-ca.crt to be provisioned in namespace")
err = WaitForKubeRootCAInNamespace(f.ClientSet, namespace.Name)
ExpectNoError(err)
} else {
Logf("Skipping waiting for service account")
}

33
test/e2e/framework/util.go
View File

@ -282,6 +282,32 @@ func WaitForNamespacesDeleted(c clientset.Interface, namespaces []string, timeou
})
}
func waitForConfigMapInNamespace(c clientset.Interface, ns, name string, timeout time.Duration) error {
fieldSelector := fields.OneTermEqualSelector("metadata.name", name).String()
lw := &cache.ListWatch{
ListFunc: func(options metav1.ListOptions) (object runtime.Object, e error) {
options.FieldSelector = fieldSelector
return c.CoreV1().ConfigMaps(ns).List(context.TODO(), options)
},
WatchFunc: func(options metav1.ListOptions) (i watch.Interface, e error) {
options.FieldSelector = fieldSelector
return c.CoreV1().ConfigMaps(ns).Watch(context.TODO(), options)
},
}
ctx, cancel := watchtools.ContextWithOptionalTimeout(context.Background(), timeout)
defer cancel()
_, err := watchtools.UntilWithSync(ctx, lw, &v1.ConfigMap{}, nil, func(event watch.Event) (bool, error) {
switch event.Type {
case watch.Deleted:
return false, apierrors.NewNotFound(schema.GroupResource{Resource: "configmaps"}, name)
case watch.Added, watch.Modified:
return true, nil
}
return false, nil
})
return err
}
func waitForServiceAccountInNamespace(c clientset.Interface, ns, serviceAccountName string, timeout time.Duration) error {
fieldSelector := fields.OneTermEqualSelector("metadata.name", serviceAccountName).String()
lw := &cache.ListWatch{
@ -321,6 +347,13 @@ func WaitForDefaultServiceAccountInNamespace(c clientset.Interface, namespace st
return waitForServiceAccountInNamespace(c, namespace, "default", ServiceAccountProvisionTimeout)
}
// WaitForKubeRootCAInNamespace waits for the configmap kube-root-ca.crt containing the service account
// CA trust bundle to be provisioned in the specified namespace so that pods do not have to retry mounting
// the config map (which creates noise that hides other issues in the Kubelet).
func WaitForKubeRootCAInNamespace(c clientset.Interface, namespace string) error {
return waitForConfigMapInNamespace(c, namespace, "kube-root-ca.crt", ServiceAccountProvisionTimeout)
}
// CreateTestingNS should be used by every test, note that we append a common prefix to the provided test name.
// Please see NewFramework instead of using this directly.
func CreateTestingNS(baseName string, c clientset.Interface, labels map[string]string) (*v1.Namespace, error) {