/**
* Predict the gateway IP address for this HeliosSoloDeployment by running and inspecting a
* container.
*
* @return The gateway IP address of the gateway probe container.
* @throws HeliosDeploymentException if the gateway probe container could not be deployed.
*/
private String containerGateway() throws HeliosDeploymentException {
// TODO(negz): Merge with dockerReachableFromContainer() ?
final ContainerConfig containerConfig =
ContainerConfig.builder()
.env(env)
.hostConfig(HostConfig.builder().build())
.image(PROBE_IMAGE)
.cmd(ImmutableList.of("sh", "-c", "while true;do sleep 10;done"))
.build();
final ContainerCreation creation;
try {
dockerClient.pull(PROBE_IMAGE);
creation = dockerClient.createContainer(containerConfig);
} catch (DockerException | InterruptedException e) {
throw new HeliosDeploymentException("helios-solo gateway probe container creation failed", e);
}
try {
dockerClient.startContainer(creation.id());
final String gateway =
dockerClient.inspectContainer(creation.id()).networkSettings().gateway();
killContainer(creation.id());
removeContainer(creation.id());
return gateway;
} catch (DockerException | InterruptedException e) {
killContainer(creation.id());
removeContainer(creation.id());
throw new HeliosDeploymentException("helios-solo gateway probe failed", e);
}
}
/**
* @param heliosHost The address at which the Helios agent should expect to find the Helios
* master.
* @return The container ID of the Helios Solo container.
* @throws HeliosDeploymentException if Helios Solo could not be deployed.
*/
private String deploySolo(final String heliosHost) throws HeliosDeploymentException {
// TODO(negz): Don't make this.env immutable so early?
final List<String> env = new ArrayList<String>();
env.addAll(this.env);
env.add("HELIOS_NAME=" + HELIOS_NAME_PREFIX + this.namespace);
env.add("HOST_ADDRESS=" + heliosHost);
final String heliosPort = String.format("%d/tcp", HELIOS_MASTER_PORT);
final Map<String, List<PortBinding>> portBindings =
ImmutableMap.of(heliosPort, singletonList(PortBinding.of("0.0.0.0", "")));
final HostConfig hostConfig =
HostConfig.builder().portBindings(portBindings).binds(binds).build();
final ContainerConfig containerConfig =
ContainerConfig.builder()
.env(ImmutableList.copyOf(env))
.hostConfig(hostConfig)
.image(HELIOS_IMAGE)
.build();
final ContainerCreation creation;
try {
dockerClient.pull(HELIOS_IMAGE);
final String containerName = HELIOS_CONTAINER_PREFIX + this.namespace;
creation = dockerClient.createContainer(containerConfig, containerName);
} catch (DockerException | InterruptedException e) {
throw new HeliosDeploymentException("helios-solo container creation failed", e);
}
try {
dockerClient.startContainer(creation.id());
} catch (DockerException | InterruptedException e) {
killContainer(creation.id());
removeContainer(creation.id());
throw new HeliosDeploymentException("helios-solo container start failed", e);
}
return creation.id();
}
/**
* @throws HeliosDeploymentException if we cannot reach the Docker daemon's API from inside a
* probe container.
*/
private void assertDockerReachableFromContainer() throws HeliosDeploymentException {
final String probeName = randomString();
final HostConfig hostConfig = HostConfig.builder().binds(binds).build();
final ContainerConfig containerConfig =
ContainerConfig.builder()
.env(env)
.hostConfig(hostConfig)
.image(PROBE_IMAGE)
.cmd(probeCommand(probeName))
.build();
final ContainerCreation creation;
try {
dockerClient.pull(PROBE_IMAGE);
creation = dockerClient.createContainer(containerConfig, probeName);
} catch (DockerException | InterruptedException e) {
throw new HeliosDeploymentException("helios-solo probe container creation failed", e);
}
final ContainerExit exit;
try {
dockerClient.startContainer(creation.id());
exit = dockerClient.waitContainer(creation.id());
} catch (DockerException | InterruptedException e) {
killContainer(creation.id());
removeContainer(creation.id());
throw new HeliosDeploymentException("helios-solo probe container failed", e);
}
if (exit.statusCode() != 0) {
removeContainer(creation.id());
throw new HeliosDeploymentException(
String.format(
"Docker was not reachable (curl exit status %d) using DOCKER_HOST=%s and "
+ "DOCKER_CERT_PATH=%s from within a container. Please ensure that "
+ "DOCKER_HOST contains a full hostname or IP address, not localhost, "
+ "127.0.0.1, etc.",
exit.statusCode(),
containerDockerHost.bindURI(),
containerDockerHost.dockerCertPath()));
}
removeContainer(creation.id());
}
public static DockerContainer create(
CreateAgentRequest request, PluginSettings settings, DockerClient docker)
throws InterruptedException, DockerException, IOException {
String containerName = UUID.randomUUID().toString();
HashMap<String, String> labels = labelsFrom(request);
String imageName = image(request.properties());
List<String> env = environmentFrom(request, settings, containerName);
try {
docker.inspectImage(imageName);
} catch (ImageNotFoundException ex) {
LOG.info("Image " + imageName + " not found, attempting to download.");
docker.pull(imageName);
}
ContainerConfig.Builder containerConfigBuilder = ContainerConfig.builder();
if (request.properties().containsKey("Command")) {
containerConfigBuilder.cmd(
splitIntoLinesAndTrimSpaces(request.properties().get("Command"))
.toArray(new String[] {}));
}
ContainerConfig containerConfig =
containerConfigBuilder.image(imageName).labels(labels).env(env).build();
ContainerCreation container = docker.createContainer(containerConfig, containerName);
String id = container.id();
ContainerInfo containerInfo = docker.inspectContainer(id);
LOG.debug("Created container " + containerName);
docker.startContainer(containerName);
return new DockerContainer(
containerName, containerInfo.created(), request.properties(), request.environment());
}
@Override
public int execute(
final List<String> commandLine,
final File executionDirectory,
final Map<String, String> environmentVariables,
final File temporaryDirectory,
final File stdoutFile,
final File stderrFile,
final boolean redirectErrorStream)
throws EoulsanException {
checkNotNull(commandLine, "commandLine argument cannot be null");
checkNotNull(executionDirectory, "executionDirectory argument cannot be null");
checkNotNull(stdoutFile, "stdoutFile argument cannot be null");
checkNotNull(stderrFile, "stderrFile argument cannot be null");
checkArgument(
executionDirectory.isDirectory(),
"execution directory does not exists or is not a directory: "
+ executionDirectory.getAbsolutePath());
try {
final List<String> env = new ArrayList<>();
if (environmentVariables != null) {
for (Map.Entry<String, String> e : environmentVariables.entrySet()) {
env.add(e.getKey() + '=' + e.getValue());
}
}
// Pull image if needed
pullImageIfNotExists(this.dockerClient, this.dockerImage);
// Create container configuration
getLogger().fine("Configure container, command to execute: " + commandLine);
final ContainerConfig.Builder builder =
ContainerConfig.builder().image(dockerImage).cmd(commandLine);
// Set the working directory
builder.workingDir(executionDirectory.getAbsolutePath());
// Set the UID and GID of the docker process
if (this.userUid >= 0 && this.userGid >= 0) {
builder.user(this.userUid + ":" + this.userGid);
}
// Define temporary directory
final List<File> toBind;
if (temporaryDirectory.isDirectory()) {
toBind = singletonList(temporaryDirectory);
env.add(TMP_DIR_ENV_VARIABLE + "=" + temporaryDirectory.getAbsolutePath());
} else {
toBind = Collections.emptyList();
}
builder.hostConfig(createBinds(executionDirectory, toBind));
// Set environment variables
builder.env(env);
// Create container
final ContainerCreation creation = this.dockerClient.createContainer(builder.build());
// Get container id
final String containerId = creation.id();
// Start container
getLogger().fine("Start of the Docker container: " + containerId);
this.dockerClient.startContainer(containerId);
// Redirect stdout and stderr
final LogStream logStream =
this.dockerClient.logs(
containerId, LogsParameter.FOLLOW, LogsParameter.STDERR, LogsParameter.STDOUT);
redirect(logStream, stdoutFile, stderrFile, redirectErrorStream);
// Wait the end of the container
getLogger().fine("Wait the end of the Docker container: " + containerId);
this.dockerClient.waitContainer(containerId);
// Get process exit code
final ContainerInfo info = this.dockerClient.inspectContainer(containerId);
final int exitValue = info.state().exitCode();
getLogger().fine("Exit value: " + exitValue);
// Stop container before removing it
this.dockerClient.stopContainer(containerId, SECOND_TO_WAIT_BEFORE_KILLING_CONTAINER);
// Remove container
getLogger().fine("Remove Docker container: " + containerId);
try {
this.dockerClient.removeContainer(containerId);
} catch (DockerException | InterruptedException e) {
EoulsanLogger.getLogger().severe("Unable to remove Docker container: " + containerId);
}
return exitValue;
} catch (DockerException | InterruptedException e) {
throw new EoulsanException(e);
}
}
private void assertDockerReachable(final int probePort) throws Exception {
try (final DockerClient docker = getNewDockerClient()) {
// Pull our base images
try {
docker.inspectImage(BUSYBOX);
} catch (ImageNotFoundException e) {
docker.pull(BUSYBOX);
}
try {
docker.inspectImage(ALPINE);
} catch (ImageNotFoundException e) {
docker.pull(ALPINE);
}
// Start a container with an exposed port
final HostConfig hostConfig =
HostConfig.builder()
.portBindings(
ImmutableMap.of("4711/tcp", singletonList(PortBinding.of("0.0.0.0", probePort))))
.build();
final ContainerConfig config =
ContainerConfig.builder()
.image(BUSYBOX)
.cmd("nc", "-p", "4711", "-lle", "cat")
.exposedPorts(ImmutableSet.of("4711/tcp"))
.hostConfig(hostConfig)
.build();
final ContainerCreation creation = docker.createContainer(config, testTag + "-probe");
final String containerId = creation.id();
docker.startContainer(containerId);
// Wait for container to come up
Polling.await(
5,
SECONDS,
new Callable<Object>() {
@Override
public Object call() throws Exception {
final ContainerInfo info = docker.inspectContainer(containerId);
return info.state().running() ? true : null;
}
});
log.info("Verifying that docker containers are reachable");
try {
Polling.awaitUnchecked(
5,
SECONDS,
new Callable<Object>() {
@Override
public Object call() throws Exception {
log.info("Probing: {}:{}", DOCKER_HOST.address(), probePort);
try (final Socket ignored = new Socket(DOCKER_HOST.address(), probePort)) {
return true;
} catch (IOException e) {
return false;
}
}
});
} catch (TimeoutException e) {
fail(
"Please ensure that DOCKER_HOST is set to an address that where containers can "
+ "be reached. If docker is running in a local VM, DOCKER_HOST must be set to the "
+ "address of that VM. If docker can only be reached on a limited port range, "
+ "set the environment variable DOCKER_PORT_RANGE=start:end");
}
docker.killContainer(containerId);
}
}