forked from moby/moby
-
Notifications
You must be signed in to change notification settings - Fork 0
/
docker_cli_links_test.go
236 lines (189 loc) · 9.15 KB
/
docker_cli_links_test.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
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
package main
import (
"encoding/json"
"fmt"
"regexp"
"strings"
"github.com/docker/docker/integration-cli/checker"
"github.com/docker/docker/pkg/testutil"
"github.com/docker/docker/runconfig"
"github.com/go-check/check"
)
func (s *DockerSuite) TestLinksPingUnlinkedContainers(c *check.C) {
testRequires(c, DaemonIsLinux)
_, exitCode, err := dockerCmdWithError("run", "--rm", "busybox", "sh", "-c", "ping -c 1 alias1 -W 1 && ping -c 1 alias2 -W 1")
// run ping failed with error
c.Assert(exitCode, checker.Equals, 1, check.Commentf("error: %v", err))
}
// Test for appropriate error when calling --link with an invalid target container
func (s *DockerSuite) TestLinksInvalidContainerTarget(c *check.C) {
testRequires(c, DaemonIsLinux)
out, _, err := dockerCmdWithError("run", "--link", "bogus:alias", "busybox", "true")
// an invalid container target should produce an error
c.Assert(err, checker.NotNil, check.Commentf("out: %s", out))
// an invalid container target should produce an error
c.Assert(out, checker.Contains, "Could not get container")
}
func (s *DockerSuite) TestLinksPingLinkedContainers(c *check.C) {
testRequires(c, DaemonIsLinux)
// Test with the three different ways of specifying the default network on Linux
testLinkPingOnNetwork(c, "")
testLinkPingOnNetwork(c, "default")
testLinkPingOnNetwork(c, "bridge")
}
func testLinkPingOnNetwork(c *check.C, network string) {
var postArgs []string
if network != "" {
postArgs = append(postArgs, []string{"--net", network}...)
}
postArgs = append(postArgs, []string{"busybox", "top"}...)
runArgs1 := append([]string{"run", "-d", "--name", "container1", "--hostname", "fred"}, postArgs...)
runArgs2 := append([]string{"run", "-d", "--name", "container2", "--hostname", "wilma"}, postArgs...)
// Run the two named containers
dockerCmd(c, runArgs1...)
dockerCmd(c, runArgs2...)
postArgs = []string{}
if network != "" {
postArgs = append(postArgs, []string{"--net", network}...)
}
postArgs = append(postArgs, []string{"busybox", "sh", "-c"}...)
// Format a run for a container which links to the other two
runArgs := append([]string{"run", "--rm", "--link", "container1:alias1", "--link", "container2:alias2"}, postArgs...)
pingCmd := "ping -c 1 %s -W 1 && ping -c 1 %s -W 1"
// test ping by alias, ping by name, and ping by hostname
// 1. Ping by alias
dockerCmd(c, append(runArgs, fmt.Sprintf(pingCmd, "alias1", "alias2"))...)
// 2. Ping by container name
dockerCmd(c, append(runArgs, fmt.Sprintf(pingCmd, "container1", "container2"))...)
// 3. Ping by hostname
dockerCmd(c, append(runArgs, fmt.Sprintf(pingCmd, "fred", "wilma"))...)
// Clean for next round
dockerCmd(c, "rm", "-f", "container1")
dockerCmd(c, "rm", "-f", "container2")
}
func (s *DockerSuite) TestLinksPingLinkedContainersAfterRename(c *check.C) {
testRequires(c, DaemonIsLinux)
out, _ := dockerCmd(c, "run", "-d", "--name", "container1", "busybox", "top")
idA := strings.TrimSpace(out)
out, _ = dockerCmd(c, "run", "-d", "--name", "container2", "busybox", "top")
idB := strings.TrimSpace(out)
dockerCmd(c, "rename", "container1", "container_new")
dockerCmd(c, "run", "--rm", "--link", "container_new:alias1", "--link", "container2:alias2", "busybox", "sh", "-c", "ping -c 1 alias1 -W 1 && ping -c 1 alias2 -W 1")
dockerCmd(c, "kill", idA)
dockerCmd(c, "kill", idB)
}
func (s *DockerSuite) TestLinksInspectLinksStarted(c *check.C) {
testRequires(c, DaemonIsLinux)
var (
expected = map[string]struct{}{"/container1:/testinspectlink/alias1": {}, "/container2:/testinspectlink/alias2": {}}
result []string
)
dockerCmd(c, "run", "-d", "--name", "container1", "busybox", "top")
dockerCmd(c, "run", "-d", "--name", "container2", "busybox", "top")
dockerCmd(c, "run", "-d", "--name", "testinspectlink", "--link", "container1:alias1", "--link", "container2:alias2", "busybox", "top")
links := inspectFieldJSON(c, "testinspectlink", "HostConfig.Links")
err := json.Unmarshal([]byte(links), &result)
c.Assert(err, checker.IsNil)
output := testutil.ConvertSliceOfStringsToMap(result)
c.Assert(output, checker.DeepEquals, expected)
}
func (s *DockerSuite) TestLinksInspectLinksStopped(c *check.C) {
testRequires(c, DaemonIsLinux)
var (
expected = map[string]struct{}{"/container1:/testinspectlink/alias1": {}, "/container2:/testinspectlink/alias2": {}}
result []string
)
dockerCmd(c, "run", "-d", "--name", "container1", "busybox", "top")
dockerCmd(c, "run", "-d", "--name", "container2", "busybox", "top")
dockerCmd(c, "run", "-d", "--name", "testinspectlink", "--link", "container1:alias1", "--link", "container2:alias2", "busybox", "true")
links := inspectFieldJSON(c, "testinspectlink", "HostConfig.Links")
err := json.Unmarshal([]byte(links), &result)
c.Assert(err, checker.IsNil)
output := testutil.ConvertSliceOfStringsToMap(result)
c.Assert(output, checker.DeepEquals, expected)
}
func (s *DockerSuite) TestLinksNotStartedParentNotFail(c *check.C) {
testRequires(c, DaemonIsLinux)
dockerCmd(c, "create", "--name=first", "busybox", "top")
dockerCmd(c, "create", "--name=second", "--link=first:first", "busybox", "top")
dockerCmd(c, "start", "first")
}
func (s *DockerSuite) TestLinksHostsFilesInject(c *check.C) {
testRequires(c, DaemonIsLinux)
testRequires(c, SameHostDaemon, ExecSupport)
out, _ := dockerCmd(c, "run", "-itd", "--name", "one", "busybox", "top")
idOne := strings.TrimSpace(out)
out, _ = dockerCmd(c, "run", "-itd", "--name", "two", "--link", "one:onetwo", "busybox", "top")
idTwo := strings.TrimSpace(out)
c.Assert(waitRun(idTwo), checker.IsNil)
readContainerFileWithExec(c, idOne, "/etc/hosts")
contentTwo := readContainerFileWithExec(c, idTwo, "/etc/hosts")
// Host is not present in updated hosts file
c.Assert(string(contentTwo), checker.Contains, "onetwo")
}
func (s *DockerSuite) TestLinksUpdateOnRestart(c *check.C) {
testRequires(c, DaemonIsLinux)
testRequires(c, SameHostDaemon, ExecSupport)
dockerCmd(c, "run", "-d", "--name", "one", "busybox", "top")
out, _ := dockerCmd(c, "run", "-d", "--name", "two", "--link", "one:onetwo", "--link", "one:one", "busybox", "top")
id := strings.TrimSpace(string(out))
realIP := inspectField(c, "one", "NetworkSettings.Networks.bridge.IPAddress")
content := readContainerFileWithExec(c, id, "/etc/hosts")
getIP := func(hosts []byte, hostname string) string {
re := regexp.MustCompile(fmt.Sprintf(`(\S*)\t%s`, regexp.QuoteMeta(hostname)))
matches := re.FindSubmatch(hosts)
c.Assert(matches, checker.NotNil, check.Commentf("Hostname %s have no matches in hosts", hostname))
return string(matches[1])
}
ip := getIP(content, "one")
c.Assert(ip, checker.Equals, realIP)
ip = getIP(content, "onetwo")
c.Assert(ip, checker.Equals, realIP)
dockerCmd(c, "restart", "one")
realIP = inspectField(c, "one", "NetworkSettings.Networks.bridge.IPAddress")
content = readContainerFileWithExec(c, id, "/etc/hosts")
ip = getIP(content, "one")
c.Assert(ip, checker.Equals, realIP)
ip = getIP(content, "onetwo")
c.Assert(ip, checker.Equals, realIP)
}
func (s *DockerSuite) TestLinksEnvs(c *check.C) {
testRequires(c, DaemonIsLinux)
dockerCmd(c, "run", "-d", "-e", "e1=", "-e", "e2=v2", "-e", "e3=v3=v3", "--name=first", "busybox", "top")
out, _ := dockerCmd(c, "run", "--name=second", "--link=first:first", "busybox", "env")
c.Assert(out, checker.Contains, "FIRST_ENV_e1=\n")
c.Assert(out, checker.Contains, "FIRST_ENV_e2=v2")
c.Assert(out, checker.Contains, "FIRST_ENV_e3=v3=v3")
}
func (s *DockerSuite) TestLinkShortDefinition(c *check.C) {
testRequires(c, DaemonIsLinux)
out, _ := dockerCmd(c, "run", "-d", "--name", "shortlinkdef", "busybox", "top")
cid := strings.TrimSpace(out)
c.Assert(waitRun(cid), checker.IsNil)
out, _ = dockerCmd(c, "run", "-d", "--name", "link2", "--link", "shortlinkdef", "busybox", "top")
cid2 := strings.TrimSpace(out)
c.Assert(waitRun(cid2), checker.IsNil)
links := inspectFieldJSON(c, cid2, "HostConfig.Links")
c.Assert(links, checker.Equals, "[\"/shortlinkdef:/link2/shortlinkdef\"]")
}
func (s *DockerSuite) TestLinksNetworkHostContainer(c *check.C) {
testRequires(c, DaemonIsLinux, NotUserNamespace)
dockerCmd(c, "run", "-d", "--net", "host", "--name", "host_container", "busybox", "top")
out, _, err := dockerCmdWithError("run", "--name", "should_fail", "--link", "host_container:tester", "busybox", "true")
// Running container linking to a container with --net host should have failed
c.Assert(err, checker.NotNil, check.Commentf("out: %s", out))
// Running container linking to a container with --net host should have failed
c.Assert(out, checker.Contains, runconfig.ErrConflictHostNetworkAndLinks.Error())
}
func (s *DockerSuite) TestLinksEtcHostsRegularFile(c *check.C) {
testRequires(c, DaemonIsLinux, NotUserNamespace)
out, _ := dockerCmd(c, "run", "--net=host", "busybox", "ls", "-la", "/etc/hosts")
// /etc/hosts should be a regular file
c.Assert(out, checker.Matches, "^-.+\n")
}
func (s *DockerSuite) TestLinksMultipleWithSameName(c *check.C) {
testRequires(c, DaemonIsLinux)
dockerCmd(c, "run", "-d", "--name=upstream-a", "busybox", "top")
dockerCmd(c, "run", "-d", "--name=upstream-b", "busybox", "top")
dockerCmd(c, "run", "--link", "upstream-a:upstream", "--link", "upstream-b:upstream", "busybox", "sh", "-c", "ping -c 1 upstream")
}