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YARN-8027. Setting hostname of docker container breaks for --net=host in docker 1.13. Contributed by Jim Brennan

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This commit is contained in:
Jason Lowe 2018-03-19 16:59:58 -05:00
parent a08921ca6c
commit f480367af6
2 changed files with 81 additions and 27 deletions
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10
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/DockerLinuxContainerRuntime.java
View File

@ -133,7 +133,8 @@
* <li>
* {@code YARN_CONTAINER_RUNTIME_DOCKER_CONTAINER_HOSTNAME} sets the
* hostname to be used by the Docker container. If not specified, a
* hostname will be derived from the container ID.
* hostname will be derived from the container ID. This variable is
* ignored if the network is 'host' and Registry DNS is not enabled.
* </li>
* <li>
* {@code YARN_CONTAINER_RUNTIME_DOCKER_RUN_PRIVILEGED_CONTAINER}
@ -785,7 +786,12 @@ public void launchContainer(ContainerRuntimeContext ctx)
.detachOnRun()
.setContainerWorkDir(containerWorkDir.toString())
.setNetworkType(network);
setHostname(runCommand, containerIdStr, hostname);
// Only add hostname if network is not host or if Registry DNS is enabled.
if (!network.equalsIgnoreCase("host") ||
conf.getBoolean(RegistryConstants.KEY_DNS_ENABLED,
RegistryConstants.DEFAULT_DNS_ENABLED)) {
setHostname(runCommand, containerIdStr, hostname);
}
runCommand.setCapabilities(capabilities);
runCommand.addAllReadWriteMountLocations(containerLogDirs);

98
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/TestDockerContainerRuntime.java
View File

@ -25,6 +25,7 @@
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.DataOutputBuffer;
import org.apache.hadoop.registry.client.api.RegistryConstants;
import org.apache.hadoop.registry.client.binding.RegistryPathUtils;
import org.apache.hadoop.security.Credentials;
import org.apache.hadoop.util.Shell;
@ -202,6 +203,8 @@ public void setup() {
LOG.info("Could not run id -G command: " + e);
}
uidGidPair = uid + ":" + gid;
// Prevent gid threshold failures for these tests
conf.setInt(YarnConfiguration.NM_DOCKER_USER_REMAPPING_GID_THRESHOLD, 0);
user = "user";
appId = "app_id";
@ -340,7 +343,7 @@ public void testDockerContainerLaunch()
List<String> dockerCommands = Files.readAllLines(Paths.get
(dockerCommandFile), Charset.forName("UTF-8"));
int expected = 15;
int expected = 14;
int counter = 0;
Assert.assertEquals(expected, dockerCommands.size());
Assert.assertEquals("[docker-command-execution]",
@ -352,7 +355,6 @@ public void testDockerContainerLaunch()
Assert.assertEquals(" docker-command=run", dockerCommands.get(counter++));
Assert.assertEquals(" group-add=" + String.join(",", groups),
dockerCommands.get(counter++));
Assert.assertEquals(" hostname=ctr-id", dockerCommands.get(counter++));
Assert
.assertEquals(" image=busybox:latest", dockerCommands.get(counter++));
Assert.assertEquals(
@ -390,7 +392,7 @@ public void testContainerLaunchWithUserRemapping()
List<String> dockerCommands = Files.readAllLines(
Paths.get(dockerCommandFile), Charset.forName("UTF-8"));
Assert.assertEquals(15, dockerCommands.size());
Assert.assertEquals(14, dockerCommands.size());
int counter = 0;
Assert.assertEquals("[docker-command-execution]",
dockerCommands.get(counter++));
@ -401,8 +403,6 @@ public void testContainerLaunchWithUserRemapping()
Assert.assertEquals(" docker-command=run", dockerCommands.get(counter++));
Assert.assertEquals(" group-add=" + String.join(",", groups),
dockerCommands.get(counter++));
Assert.assertEquals(" hostname=ctr-id",
dockerCommands.get(counter++));
Assert
.assertEquals(" image=busybox:latest", dockerCommands.get(counter++));
Assert.assertEquals(
@ -488,10 +488,7 @@ public void testContainerLaunchWithNetworkingDefaults()
LOG.info("Caught expected exception: " + e);
}
int size = YarnConfiguration
.DEFAULT_NM_DOCKER_ALLOWED_CONTAINER_NETWORKS.length;
String allowedNetwork = YarnConfiguration
.DEFAULT_NM_DOCKER_ALLOWED_CONTAINER_NETWORKS[randEngine.nextInt(size)];
String allowedNetwork = "bridge";
env.put(DockerLinuxContainerRuntime.ENV_DOCKER_CONTAINER_NETWORK,
allowedNetwork);
String expectedHostname = "test.hostname";
@ -542,6 +539,64 @@ public void testContainerLaunchWithNetworkingDefaults()
dockerCommands.get(counter));
}
@Test
@SuppressWarnings("unchecked")
public void testContainerLaunchWithHostDnsNetwork()
throws ContainerExecutionException, IOException,
PrivilegedOperationException {
// Make it look like Registry DNS is enabled so we can test whether
// hostname goes through
conf.setBoolean(RegistryConstants.KEY_DNS_ENABLED, true);
DockerLinuxContainerRuntime runtime =
new DockerLinuxContainerRuntime(mockExecutor, mockCGroupsHandler);
runtime.initialize(conf, null);
String expectedHostname = "test.hostname";
env.put(DockerLinuxContainerRuntime.ENV_DOCKER_CONTAINER_HOSTNAME,
expectedHostname);
runtime.launchContainer(builder.build());
PrivilegedOperation op = capturePrivilegedOperationAndVerifyArgs();
List<String> args = op.getArguments();
String dockerCommandFile = args.get(11);
//This is the expected docker invocation for this case
List<String> dockerCommands = Files
.readAllLines(Paths.get(dockerCommandFile), Charset.forName("UTF-8"));
int expected = 15;
int counter = 0;
Assert.assertEquals(expected, dockerCommands.size());
Assert.assertEquals("[docker-command-execution]",
dockerCommands.get(counter++));
Assert.assertEquals(" cap-add=SYS_CHROOT,NET_BIND_SERVICE",
dockerCommands.get(counter++));
Assert.assertEquals(" cap-drop=ALL", dockerCommands.get(counter++));
Assert.assertEquals(" detach=true", dockerCommands.get(counter++));
Assert.assertEquals(" docker-command=run", dockerCommands.get(counter++));
Assert.assertEquals(" group-add=" + String.join(",", groups),
dockerCommands.get(counter++));
Assert.assertEquals(" hostname=test.hostname",
dockerCommands.get(counter++));
Assert
.assertEquals(" image=busybox:latest", dockerCommands.get(counter++));
Assert.assertEquals(
" launch-command=bash,/test_container_work_dir/launch_container.sh",
dockerCommands.get(counter++));
Assert.assertEquals(" name=container_id", dockerCommands.get(counter++));
Assert
.assertEquals(" net=host", dockerCommands.get(counter++));
Assert.assertEquals(" ro-mounts=/test_filecache_dir:/test_filecache_dir,"
+ "/test_user_filecache_dir:/test_user_filecache_dir",
dockerCommands.get(counter++));
Assert.assertEquals(
" rw-mounts=/test_container_log_dir:/test_container_log_dir,"
+ "/test_application_local_dir:/test_application_local_dir",
dockerCommands.get(counter++));
Assert.assertEquals(" user=" + uidGidPair, dockerCommands.get(counter++));
Assert.assertEquals(" workdir=/test_container_work_dir",
dockerCommands.get(counter));
}
@Test
@SuppressWarnings("unchecked")
public void testContainerLaunchWithCustomNetworks()
@ -686,7 +741,7 @@ public void testLaunchPidNamespaceContainersInvalidEnvVar()
List<String> dockerCommands = Files.readAllLines(Paths.get
(dockerCommandFile), Charset.forName("UTF-8"));
int expected = 15;
int expected = 14;
Assert.assertEquals(expected, dockerCommands.size());
String command = dockerCommands.get(0);
@ -737,7 +792,7 @@ public void testLaunchPidNamespaceContainersEnabled()
List<String> dockerCommands = Files.readAllLines(
Paths.get(dockerCommandFile), Charset.forName("UTF-8"));
int expected = 16;
int expected = 15;
int counter = 0;
Assert.assertEquals(expected, dockerCommands.size());
Assert.assertEquals("[docker-command-execution]",
@ -749,7 +804,6 @@ public void testLaunchPidNamespaceContainersEnabled()
Assert.assertEquals(" docker-command=run", dockerCommands.get(counter++));
Assert.assertEquals(" group-add=" + String.join(",", groups),
dockerCommands.get(counter++));
Assert.assertEquals(" hostname=ctr-id", dockerCommands.get(counter++));
Assert
.assertEquals(" image=busybox:latest", dockerCommands.get(counter++));
Assert.assertEquals(
@ -789,7 +843,7 @@ public void testLaunchPrivilegedContainersInvalidEnvVar()
List<String> dockerCommands = Files.readAllLines(
Paths.get(dockerCommandFile), Charset.forName("UTF-8"));
int expected = 15;
int expected = 14;
Assert.assertEquals(expected, dockerCommands.size());
String command = dockerCommands.get(0);
@ -895,7 +949,7 @@ public void testLaunchPrivilegedContainersWithEnabledSettingAndDefaultACL()
List<String> dockerCommands = Files.readAllLines(Paths.get
(dockerCommandFile), Charset.forName("UTF-8"));
int expected = 16;
int expected = 15;
int counter = 0;
Assert.assertEquals(expected, dockerCommands.size());
Assert.assertEquals("[docker-command-execution]",
@ -907,7 +961,6 @@ public void testLaunchPrivilegedContainersWithEnabledSettingAndDefaultACL()
Assert.assertEquals(" docker-command=run", dockerCommands.get(counter++));
Assert.assertEquals(" group-add=" + String.join(",", groups),
dockerCommands.get(counter++));
Assert.assertEquals(" hostname=ctr-id", dockerCommands.get(counter++));
Assert
.assertEquals(" image=busybox:latest", dockerCommands.get(counter++));
Assert.assertEquals(
@ -1012,7 +1065,7 @@ public void testMountSourceTarget()
List<String> dockerCommands = Files.readAllLines(Paths.get
(dockerCommandFile), Charset.forName("UTF-8"));
int expected = 15;
int expected = 14;
int counter = 0;
Assert.assertEquals(expected, dockerCommands.size());
Assert.assertEquals("[docker-command-execution]",
@ -1024,7 +1077,6 @@ public void testMountSourceTarget()
Assert.assertEquals(" docker-command=run", dockerCommands.get(counter++));
Assert.assertEquals(" group-add=" + String.join(",", groups),
dockerCommands.get(counter++));
Assert.assertEquals(" hostname=ctr-id", dockerCommands.get(counter++));
Assert.assertEquals(" image=busybox:latest",
dockerCommands.get(counter++));
Assert.assertEquals(
@ -1085,7 +1137,7 @@ public void testMountMultiple()
List<String> dockerCommands = Files.readAllLines(Paths.get
(dockerCommandFile), Charset.forName("UTF-8"));
int expected = 15;
int expected = 14;
int counter = 0;
Assert.assertEquals(expected, dockerCommands.size());
Assert.assertEquals("[docker-command-execution]",
@ -1097,7 +1149,6 @@ public void testMountMultiple()
Assert.assertEquals(" docker-command=run", dockerCommands.get(counter++));
Assert.assertEquals(" group-add=" + String.join(",", groups),
dockerCommands.get(counter++));
Assert.assertEquals(" hostname=ctr-id", dockerCommands.get(counter++));
Assert.assertEquals(" image=busybox:latest",
dockerCommands.get(counter++));
Assert.assertEquals(
@ -1140,7 +1191,7 @@ public void testUserMounts()
List<String> dockerCommands = Files.readAllLines(
Paths.get(dockerCommandFile), Charset.forName("UTF-8"));
int expected = 15;
int expected = 14;
int counter = 0;
Assert.assertEquals(expected, dockerCommands.size());
Assert.assertEquals("[docker-command-execution]",
@ -1152,7 +1203,6 @@ public void testUserMounts()
Assert.assertEquals(" docker-command=run", dockerCommands.get(counter++));
Assert.assertEquals(" group-add=" + String.join(",", groups),
dockerCommands.get(counter++));
Assert.assertEquals(" hostname=ctr-id", dockerCommands.get(counter++));
Assert.assertEquals(" image=busybox:latest",
dockerCommands.get(counter++));
Assert.assertEquals(
@ -1635,7 +1685,7 @@ public void testDockerCommandPlugin() throws Exception {
List<String> dockerCommands = Files.readAllLines(Paths.get
(dockerCommandFile), Charset.forName("UTF-8"));
int expected = 16;
int expected = 15;
int counter = 0;
Assert.assertEquals(expected, dockerCommands.size());
Assert.assertEquals("[docker-command-execution]",
@ -1647,7 +1697,6 @@ public void testDockerCommandPlugin() throws Exception {
Assert.assertEquals(" docker-command=run", dockerCommands.get(counter++));
Assert.assertEquals(" group-add=" + String.join(",", groups),
dockerCommands.get(counter++));
Assert.assertEquals(" hostname=ctr-id", dockerCommands.get(counter++));
Assert
.assertEquals(" image=busybox:latest", dockerCommands.get(counter++));
Assert.assertEquals(
@ -1775,7 +1824,7 @@ public void testLaunchContainerWithDockerTokens()
List<String> dockerCommands = Files
.readAllLines(Paths.get(dockerCommandFile), Charset.forName("UTF-8"));
int expected = 16;
int expected = 15;
int counter = 0;
Assert.assertEquals(expected, dockerCommands.size());
Assert.assertEquals("[docker-command-execution]",
@ -1789,7 +1838,6 @@ public void testLaunchContainerWithDockerTokens()
dockerCommands.get(counter++));
Assert.assertEquals(" group-add=" + String.join(",", groups),
dockerCommands.get(counter++));
Assert.assertEquals(" hostname=ctr-id", dockerCommands.get(counter++));
Assert.assertEquals(" image=busybox:latest",
dockerCommands.get(counter++));
Assert.assertEquals(