-
Notifications
You must be signed in to change notification settings - Fork 39.2k
/
kubelet.go
217 lines (200 loc) · 7.63 KB
/
kubelet.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
/*
Copyright 2016 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 node
import (
"bytes"
"context"
"fmt"
"strings"
"time"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/uuid"
"k8s.io/kubernetes/test/e2e/framework"
e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
admissionapi "k8s.io/pod-security-admission/api"
"github.com/onsi/ginkgo/v2"
"github.com/onsi/gomega"
)
var _ = SIGDescribe("Kubelet", func() {
f := framework.NewDefaultFramework("kubelet-test")
f.NamespacePodSecurityLevel = admissionapi.LevelBaseline
var podClient *e2epod.PodClient
ginkgo.BeforeEach(func() {
podClient = e2epod.NewPodClient(f)
})
ginkgo.Context("when scheduling a busybox command in a pod", func() {
podName := "busybox-scheduling-" + string(uuid.NewUUID())
/*
Release: v1.13
Testname: Kubelet, log output, default
Description: By default the stdout and stderr from the process being executed in a pod MUST be sent to the pod's logs.
*/
framework.ConformanceIt("should print the output to logs [NodeConformance]", func(ctx context.Context) {
podClient.CreateSync(ctx, &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: podName,
},
Spec: v1.PodSpec{
// Don't restart the Pod since it is expected to exit
RestartPolicy: v1.RestartPolicyNever,
Containers: []v1.Container{
{
Image: framework.BusyBoxImage,
Name: podName,
Command: []string{"sh", "-c", "echo 'Hello World' ; sleep 240"},
},
},
},
})
gomega.Eventually(ctx, func() string {
sinceTime := metav1.NewTime(time.Now().Add(time.Duration(-1 * time.Hour)))
rc, err := podClient.GetLogs(podName, &v1.PodLogOptions{SinceTime: &sinceTime}).Stream(ctx)
if err != nil {
return ""
}
defer rc.Close()
buf := new(bytes.Buffer)
buf.ReadFrom(rc)
return buf.String()
}, time.Minute, time.Second*4).Should(gomega.Equal("Hello World\n"))
})
})
ginkgo.Context("when scheduling a busybox command that always fails in a pod", func() {
var podName string
ginkgo.BeforeEach(func(ctx context.Context) {
podName = "bin-false" + string(uuid.NewUUID())
podClient.Create(ctx, &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: podName,
},
Spec: v1.PodSpec{
// Don't restart the Pod since it is expected to exit
RestartPolicy: v1.RestartPolicyNever,
Containers: []v1.Container{
{
Image: framework.BusyBoxImage,
Name: podName,
Command: []string{"/bin/false"},
},
},
},
})
})
/*
Release: v1.13
Testname: Kubelet, failed pod, terminated reason
Description: Create a Pod with terminated state. Pod MUST have only one container. Container MUST be in terminated state and MUST have an terminated reason.
*/
framework.ConformanceIt("should have an terminated reason [NodeConformance]", func(ctx context.Context) {
gomega.Eventually(ctx, func() error {
podData, err := podClient.Get(ctx, podName, metav1.GetOptions{})
if err != nil {
return err
}
if len(podData.Status.ContainerStatuses) != 1 {
return fmt.Errorf("expected only one container in the pod %q", podName)
}
contTerminatedState := podData.Status.ContainerStatuses[0].State.Terminated
if contTerminatedState == nil {
return fmt.Errorf("expected state to be terminated. Got pod status: %+v", podData.Status)
}
if contTerminatedState.ExitCode == 0 || contTerminatedState.Reason == "" {
return fmt.Errorf("expected non-zero exitCode and non-empty terminated state reason. Got exitCode: %+v and terminated state reason: %+v", contTerminatedState.ExitCode, contTerminatedState.Reason)
}
return nil
}, framework.PodStartTimeout, time.Second*4).Should(gomega.BeNil())
})
/*
Release: v1.13
Testname: Kubelet, failed pod, delete
Description: Create a Pod with terminated state. This terminated pod MUST be able to be deleted.
*/
framework.ConformanceIt("should be possible to delete [NodeConformance]", func(ctx context.Context) {
err := podClient.Delete(ctx, podName, metav1.DeleteOptions{})
framework.ExpectNoError(err, "deleting Pod")
})
})
ginkgo.Context("when scheduling an agnhost Pod with hostAliases", func() {
podName := "agnhost-host-aliases" + string(uuid.NewUUID())
/*
Release: v1.13
Testname: Kubelet, hostAliases
Description: Create a Pod with hostAliases and a container with command to output /etc/hosts entries. Pod's logs MUST have matching entries of specified hostAliases to the output of /etc/hosts entries.
*/
framework.ConformanceIt("should write entries to /etc/hosts [NodeConformance]", func(ctx context.Context) {
pod := e2epod.NewAgnhostPod(f.Namespace.Name, podName, nil, nil, nil, "etc-hosts")
// Don't restart the Pod since it is expected to exit
pod.Spec.RestartPolicy = v1.RestartPolicyNever
pod.Spec.HostAliases = []v1.HostAlias{
{
IP: "123.45.67.89",
Hostnames: []string{"foo", "bar"},
},
}
pod = podClient.Create(ctx, pod)
ginkgo.By("Waiting for pod completion")
err := e2epod.WaitForPodNoLongerRunningInNamespace(ctx, f.ClientSet, pod.Name, f.Namespace.Name)
framework.ExpectNoError(err)
rc, err := podClient.GetLogs(podName, &v1.PodLogOptions{}).Stream(ctx)
framework.ExpectNoError(err)
defer rc.Close()
buf := new(bytes.Buffer)
buf.ReadFrom(rc)
hostsFileContent := buf.String()
errMsg := fmt.Sprintf("expected hosts file to contain entries from HostAliases. Got:\n%+v", hostsFileContent)
framework.ExpectEqual(true, strings.Contains(hostsFileContent, "123.45.67.89\tfoo\tbar"), errMsg)
})
})
ginkgo.Context("when scheduling a read only busybox container", func() {
podName := "busybox-readonly-fs" + string(uuid.NewUUID())
/*
Release: v1.13
Testname: Kubelet, pod with read only root file system
Description: Create a Pod with security context set with ReadOnlyRootFileSystem set to true. The Pod then tries to write to the /file on the root, write operation to the root filesystem MUST fail as expected.
This test is marked LinuxOnly since Windows does not support creating containers with read-only access.
*/
framework.ConformanceIt("should not write to root filesystem [LinuxOnly] [NodeConformance]", func(ctx context.Context) {
isReadOnly := true
podClient.CreateSync(ctx, &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: podName,
},
Spec: v1.PodSpec{
// Don't restart the Pod since it is expected to exit
RestartPolicy: v1.RestartPolicyNever,
Containers: []v1.Container{
{
Image: framework.BusyBoxImage,
Name: podName,
Command: []string{"/bin/sh", "-c", "echo test > /file; sleep 240"},
SecurityContext: &v1.SecurityContext{
ReadOnlyRootFilesystem: &isReadOnly,
},
},
},
},
})
gomega.Eventually(ctx, func() string {
rc, err := podClient.GetLogs(podName, &v1.PodLogOptions{}).Stream(ctx)
if err != nil {
return ""
}
defer rc.Close()
buf := new(bytes.Buffer)
buf.ReadFrom(rc)
return buf.String()
}, time.Minute, time.Second*4).Should(gomega.Equal("/bin/sh: can't create /file: Read-only file system\n"))
})
})
})