kubeadm_config_test.go

Documentation: k8s.io/kubernetes/test/e2e_kubeadm

     1  /*
     2  Copyright 2019 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package kubeadm
    18  
    19  import (
    20  	"context"
    21  
    22  	"gopkg.in/yaml.v2"
    23  	authv1 "k8s.io/api/authorization/v1"
    24  	rbacv1 "k8s.io/api/rbac/v1"
    25  	clientset "k8s.io/client-go/kubernetes"
    26  	"k8s.io/kubernetes/test/e2e/framework"
    27  	admissionapi "k8s.io/pod-security-admission/api"
    28  
    29  	"github.com/onsi/ginkgo/v2"
    30  	"github.com/onsi/gomega"
    31  )
    32  
    33  const (
    34  	kubeadmConfigName                             = "kubeadm-config"
    35  	kubeadmConfigRoleName                         = "kubeadm:nodes-kubeadm-config"
    36  	kubeadmConfigRoleBindingName                  = kubeadmConfigRoleName
    37  	kubeadmConfigClusterConfigurationConfigMapKey = "ClusterConfiguration"
    38  )
    39  
    40  var (
    41  	kubeadmConfigConfigMapResource = &authv1.ResourceAttributes{
    42  		Namespace: kubeSystemNamespace,
    43  		Name:      kubeadmConfigName,
    44  		Resource:  "configmaps",
    45  		Verb:      "get",
    46  	}
    47  )
    48  
    49  // Define container for all the test specification aimed at verifying
    50  // that kubeadm creates the cluster-info ConfigMap, that it is properly configured
    51  // and that all the related RBAC rules are in place
    52  var _ = Describe("kubeadm-config ConfigMap", func() {
    53  
    54  	// Get an instance of the k8s test framework
    55  	f := framework.NewDefaultFramework("kubeadm-config")
    56  	f.NamespacePodSecurityLevel = admissionapi.LevelPrivileged
    57  
    58  	// Tests in this container are not expected to create new objects in the cluster
    59  	// so we are disabling the creation of a namespace in order to get a faster execution
    60  	f.SkipNamespaceCreation = true
    61  
    62  	ginkgo.It("should exist and be properly configured", func(ctx context.Context) {
    63  		cm := GetConfigMap(f.ClientSet, kubeSystemNamespace, kubeadmConfigName)
    64  
    65  		gomega.Expect(cm.Data).To(gomega.HaveKey(kubeadmConfigClusterConfigurationConfigMapKey))
    66  	})
    67  
    68  	ginkgo.It("should have related Role and RoleBinding", func(ctx context.Context) {
    69  		ExpectRole(f.ClientSet, kubeSystemNamespace, kubeadmConfigRoleName)
    70  		ExpectRoleBinding(f.ClientSet, kubeSystemNamespace, kubeadmConfigRoleBindingName)
    71  	})
    72  
    73  	ginkgo.It("should be accessible for bootstrap tokens", func(ctx context.Context) {
    74  		ExpectSubjectHasAccessToResource(f.ClientSet,
    75  			rbacv1.GroupKind, bootstrapTokensGroup,
    76  			kubeadmConfigConfigMapResource,
    77  		)
    78  	})
    79  
    80  	ginkgo.It("should be accessible for nodes", func(ctx context.Context) {
    81  		ExpectSubjectHasAccessToResource(f.ClientSet,
    82  			rbacv1.GroupKind, nodesGroup,
    83  			kubeadmConfigConfigMapResource,
    84  		)
    85  	})
    86  })
    87  
    88  func getClusterConfiguration(c clientset.Interface) map[interface{}]interface{} {
    89  	cm := GetConfigMap(c, kubeSystemNamespace, kubeadmConfigName)
    90  
    91  	gomega.Expect(cm.Data).To(gomega.HaveKey(kubeadmConfigClusterConfigurationConfigMapKey))
    92  
    93  	return unmarshalYaml(cm.Data[kubeadmConfigClusterConfigurationConfigMapKey])
    94  }
    95  
    96  func unmarshalYaml(data string) map[interface{}]interface{} {
    97  	m := make(map[interface{}]interface{})
    98  	err := yaml.Unmarshal([]byte(data), &m)
    99  	if err != nil {
   100  		framework.Failf("error parsing %s ConfigMap: %v", kubeadmConfigName, err)
   101  	}
   102  	return m
   103  }
   104
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