node_authn.go

Documentation: k8s.io/kubernetes/test/e2e/auth

     1  /*
     2  Copyright 2018 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 auth
    18  
    19  import (
    20  	"context"
    21  	"fmt"
    22  	"net"
    23  	"strconv"
    24  
    25  	v1 "k8s.io/api/core/v1"
    26  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    27  	"k8s.io/kubernetes/pkg/cluster/ports"
    28  	"k8s.io/kubernetes/test/e2e/feature"
    29  	"k8s.io/kubernetes/test/e2e/framework"
    30  	e2enode "k8s.io/kubernetes/test/e2e/framework/node"
    31  	e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
    32  	e2eoutput "k8s.io/kubernetes/test/e2e/framework/pod/output"
    33  	admissionapi "k8s.io/pod-security-admission/api"
    34  
    35  	"github.com/onsi/ginkgo/v2"
    36  	"github.com/onsi/gomega"
    37  )
    38  
    39  var _ = SIGDescribe(feature.NodeAuthenticator, func() {
    40  
    41  	f := framework.NewDefaultFramework("node-authn")
    42  	f.NamespacePodSecurityLevel = admissionapi.LevelBaseline
    43  	var ns string
    44  	var nodeIPs []string
    45  	ginkgo.BeforeEach(func(ctx context.Context) {
    46  		ns = f.Namespace.Name
    47  
    48  		nodes, err := e2enode.GetBoundedReadySchedulableNodes(ctx, f.ClientSet, 1)
    49  		framework.ExpectNoError(err)
    50  
    51  		family := v1.IPv4Protocol
    52  		if framework.TestContext.ClusterIsIPv6() {
    53  			family = v1.IPv6Protocol
    54  		}
    55  
    56  		nodeIPs := e2enode.GetAddressesByTypeAndFamily(&nodes.Items[0], v1.NodeInternalIP, family)
    57  		gomega.Expect(nodeIPs).NotTo(gomega.BeEmpty())
    58  	})
    59  
    60  	ginkgo.It("The kubelet's main port 10250 should reject requests with no credentials", func(ctx context.Context) {
    61  		pod := createNodeAuthTestPod(ctx, f)
    62  		for _, nodeIP := range nodeIPs {
    63  			// Anonymous authentication is disabled by default
    64  			host := net.JoinHostPort(nodeIP, strconv.Itoa(ports.KubeletPort))
    65  			result := e2eoutput.RunHostCmdOrDie(ns, pod.Name, fmt.Sprintf("curl -sIk -o /dev/null -w '%s' https://%s/metrics", "%{http_code}", host))
    66  			gomega.Expect(result).To(gomega.Or(gomega.Equal("401"), gomega.Equal("403")), "the kubelet's main port 10250 should reject requests with no credentials")
    67  		}
    68  	})
    69  
    70  	ginkgo.It("The kubelet can delegate ServiceAccount tokens to the API server", func(ctx context.Context) {
    71  		ginkgo.By("create a new ServiceAccount for authentication")
    72  		trueValue := true
    73  		newSA := &v1.ServiceAccount{
    74  			ObjectMeta: metav1.ObjectMeta{
    75  				Namespace: ns,
    76  				Name:      "node-auth-newsa",
    77  			},
    78  			AutomountServiceAccountToken: &trueValue,
    79  		}
    80  		_, err := f.ClientSet.CoreV1().ServiceAccounts(ns).Create(ctx, newSA, metav1.CreateOptions{})
    81  		framework.ExpectNoError(err, "failed to create service account (%s:%s)", ns, newSA.Name)
    82  
    83  		pod := createNodeAuthTestPod(ctx, f)
    84  
    85  		for _, nodeIP := range nodeIPs {
    86  			host := net.JoinHostPort(nodeIP, strconv.Itoa(ports.KubeletPort))
    87  			result := e2eoutput.RunHostCmdOrDie(ns,
    88  				pod.Name,
    89  				fmt.Sprintf("curl -sIk -o /dev/null -w '%s' --header \"Authorization: Bearer `%s`\" https://%s/metrics",
    90  					"%{http_code}",
    91  					"cat /var/run/secrets/kubernetes.io/serviceaccount/token",
    92  					host))
    93  			gomega.Expect(result).To(gomega.Or(gomega.Equal("401"), gomega.Equal("403")), "the kubelet can delegate ServiceAccount tokens to the API server")
    94  		}
    95  	})
    96  })
    97  
    98  func createNodeAuthTestPod(ctx context.Context, f *framework.Framework) *v1.Pod {
    99  	pod := e2epod.NewAgnhostPod(f.Namespace.Name, "agnhost-pod", nil, nil, nil)
   100  	pod.ObjectMeta.GenerateName = "test-node-authn-"
   101  	return e2epod.NewPodClient(f).CreateSync(ctx, pod)
   102  }
   103
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