diff --git a/test/e2e_kubeadm/admin_test.go b/test/e2e_kubeadm/admin_test.go new file mode 100644 index 00000000000..bb49b3973d2 --- /dev/null +++ b/test/e2e_kubeadm/admin_test.go @@ -0,0 +1,91 @@ +/* +Copyright 2023 The Kubernetes Authors. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package kubeadm + +import ( + "context" + + "github.com/onsi/ginkgo/v2" + + rbacv1 "k8s.io/api/rbac/v1" + "k8s.io/apimachinery/pkg/util/version" + admissionapi "k8s.io/pod-security-admission/api" + + "k8s.io/kubernetes/test/e2e/framework" + e2eskipper "k8s.io/kubernetes/test/e2e/framework/skipper" +) + +const ( + kubeadmClusterAdminsGroupAndCRB = "kubeadm:cluster-admins" + clusterAdminClusterRole = "cluster-admin" +) + +// Define a container for all the tests aimed at verifying that administrators +// have "cluster-admin" level of access. +var _ = Describe("admin", func() { + + // Get an instance of the k8s test framework + f := framework.NewDefaultFramework("admin") + f.NamespacePodSecurityLevel = admissionapi.LevelPrivileged + + // Tests in this container are not expected to create new objects in the cluster + // so we are disabling the creation of a namespace in order to get a faster execution + f.SkipNamespaceCreation = true + + ginkgo.It("kubeadm:cluster-admins CRB must exist and be binding the cluster-admin ClusterRole"+ + " to the kubeadm:cluster-admins Group", func(ctx context.Context) { + + // Use the ClusterConfiguration.kubernetesVersion to decide whether to look for the CRB. + // It was added in kubeadm v1.29-pre, but kubeadm supports a maximum skew of N-1 + // with the control plane, so this is fine as long as kubernetesVersion matches + // the kubeadm version. Otherwise this test is skipped. + m := getClusterConfiguration(f.ClientSet) + const verKey = "kubernetesVersion" + verInterface, exists := m[verKey] + if !exists { + framework.Failf("the kubeadm ConfigMap %s is missing a %s key in %s", + kubeadmConfigName, + verKey, + kubeadmConfigClusterConfigurationConfigMapKey) + } + + // Parse the version string + verStr, ok := verInterface.(string) + if !ok { + framework.Failf("cannot cast %s to string", verKey) + } + ver, err := version.ParseSemantic(verStr) + if err != nil { + framework.Failf("could not parse the %s key: %v", verKey, err) + } + + // If the version is older than the version when this feature was added, skip this test + minVer := version.MustParseSemantic("v1.29.0-alpha.2.188+05076de57fc49f") + if !ver.AtLeast(minVer) { + e2eskipper.Skipf("Skipping because version %s is older than the minimum version %s", + ver, + minVer) + } + + // Expect the CRB to exist + ExpectClusterRoleBindingWithSubjectAndRole(f.ClientSet, + kubeadmClusterAdminsGroupAndCRB, + rbacv1.GroupKind, kubeadmClusterAdminsGroupAndCRB, + clusterAdminClusterRole, + ) + }) +})