docker-java

Java API client for Docker

The current implementation is based on Jersey 2.x and therefore classpath incompatible with older Jersey 1.x dependent libraries!

Developer forum for docker-java

Changelog
Wiki

Build with Maven

Prerequisites:

• Java min 1.7
• Maven 3

Build and run integration tests as follows:

$ mvn clean install

If you do not have access to a Docker server or just want to execute the build quickly, you can run the build without the integration tests:

$ mvn clean install -DskipITs

By default the docker engine is using local UNIX sockets for communication with the docker CLI so docker-java client also uses UNIX domain sockets to connect to the docker daemon by default. To make the docker daemon listening on a TCP (http/https) port you have to configure it by setting the DOCKER_OPTS environment variable to something like the following:

DOCKER_OPTS="-H tcp://127.0.0.1:2375 -H unix:///var/run/docker.sock"

More details about setting up Docker Engine can be found in the official documentation: https://docs.docker.com/engine/admin/

To force docker-java to use TCP (http) configure the following (see Configuration for details):

DOCKER_HOST=tcp://127.0.0.1:2375

For secure tls (https) communication:

DOCKER_HOST=tcp://127.0.0.1:2376
DOCKER_TLS_VERIFY=1
DOCKER_CERT_PATH=/Users/marcus/.docker/machine/machines/docker-1.11.2

Latest release version

Supports a subset of the Docker Remote API v1.37, Docker Server version since 1.12.6

<dependency>
      <groupId>com.github.docker-java</groupId>
      <artifactId>docker-java</artifactId>
      <!-- use latest version https://github.com/docker-java/docker-java/releases -->
      <version>3.X.Y</version>
</dependency>

Latest development version

May contain new features while they are not released.

You can find the latest development version including javadoc and source files on Sonatypes OSS repository.

<dependency>
      <groupId>com.github.docker-java</groupId>
      <artifactId>docker-java</artifactId>
      <version>3.X.Y-SNAPSHOT</version>
</dependency>

Documentation

For code examples, please look at the Wiki or Test cases

Configuration

There are a couple of configuration items, all of which have sensible defaults:

• DOCKER_HOST The Docker Host URL, e.g. tcp://localhost:2376 or unix:///var/run/docker.sock
• DOCKER_TLS_VERIFY enable/disable TLS verification (switch between http and https protocol)
• DOCKER_CERT_PATH Path to the certificates needed for TLS verification
• DOCKER_CONFIG Path for additional docker configuration files (like .dockercfg)
• api.version The API version, e.g. 1.23.
• registry.url Your registry's address.
• registry.username Your registry username (required to push containers).
• registry.password Your registry password.
• registry.email Your registry email.

There are three ways to configure, in descending order of precedence:

Programmatic:

In your application, e.g.

DockerClientConfig config = DefaultDockerClientConfig.createDefaultConfigBuilder()
    .withDockerHost("tcp://my-docker-host.tld:2376")
    .withDockerTlsVerify(true)
    .withDockerCertPath("/home/user/.docker/certs")
    .withDockerConfig("/home/user/.docker")
    .withApiVersion("1.30") // optional
    .withRegistryUrl("https://index.docker.io/v1/")
    .withRegistryUsername("dockeruser")
    .withRegistryPassword("ilovedocker")
    .withRegistryEmail("dockeruser@github.com")
    .build();
DockerClient docker = DockerClientBuilder.getInstance(config).build();

Properties (docker-java.properties)

DOCKER_HOST=tcp://localhost:2376
DOCKER_TLS_VERIFY=1
DOCKER_CERT_PATH=/home/user/.docker/certs
DOCKER_CONFIG=/home/user/.docker
api.version=1.23
registry.url=https://index.docker.io/v1/
registry.username=dockeruser
registry.password=ilovedocker
registry.email=dockeruser@github.com

System Properties:

java -DDOCKER_HOST=tcp://localhost:2375 -Dregistry.username=dockeruser pkg.Main

System Environment

export DOCKER_HOST=tcp://localhost:2376
export DOCKER_TLS_VERIFY=1
export DOCKER_CERT_PATH=/home/user/.docker/certs
export DOCKER_CONFIG=/home/user/.docker

File System

In $HOME/.docker-java.properties

Class Path

In the class path at /docker-java.properties