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

Build with Maven

Prerequisites:

• Java 1.7
• Maven 3.0.5

If you need SSL, then you'll need to put your *.pem file into ~/.docker/, if you're using boot2docker, do this:

$ ln -s /Users/alex.collins/.boot2docker/certs/boot2docker-vm .docker

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 Docker server is using UNIX sockets for communication with the Docker client, however docker-java client uses TCP/IP to connect to the Docker server by default, so you will need to make sure that your Docker server is listening on TCP port. To allow Docker server to use TCP add the following line to /etc/default/docker

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

However you can force docker-java to use UNIX socket communication by configure the following (see Configuration for details):

DOCKER_HOST=unix:///var/run/docker.sock
DOCKER_TLS_VERIFY=0

More details about setting up Docker server can be found in official documentation: http://docs.docker.io/en/latest/use/basics/

Now make sure that docker is up:

$ docker -H tcp://127.0.0.1:2375 version

Client version: 0.8.0
Go version (client): go1.2
Git commit (client): cc3a8c8
Server version: 1.2.0
Git commit (server): fa7b24f
Go version (server): go1.3.1

Run build without integration tests:

$ mvn clean install -DskipITs

Docker-Java maven dependencies

Latest release version

Supports a subset of the Docker Remote API v1.19, Docker Server version 1.7.x

<dependency>
      <groupId>com.github.docker-java</groupId>
      <artifactId>docker-java</artifactId>
      <version>2.2.3</version>
</dependency>

Latest release candidate

Supports a subset of the Docker Remote API v1.22, Docker Server version 1.10.x

<dependency>
      <groupId>com.github.docker-java</groupId>
      <artifactId>docker-java</artifactId>
      <version>3.0.0-RC5</version>
</dependency>

Latest development version

Supports a subset of the Docker Remote API v1.22, Docker Server version 1.10.x

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>3.0.0-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. 1.21.
• 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 = DockerClientConfig.createDefaultConfigBuilder()
    .withDockerHost("tcp://my-docker-host.tld:2376")
    .withDockerTlsVerify(true)
    .withDockerCertPath("/home/user/.docker/certs")
    .withDockerConfig("/home/user/.docker")
    .withApiVersion("1.21")
    .withRegistryUrl("https://index.docker.io/v1/")
    .withRegistryUsername("dockeruser")
    .withRegistryPassword("ilovedocker")
    .withRegistryEmail("[email protected]")
    .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=1.21
registry.url=https://index.docker.io/v1/
registry.username=dockeruser
registry.password=ilovedocker
[email protected]

System Properties:

java -Dregistry.username=dockeruser pkg.Main

System Environment

export DOCKER_URL=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