docker-java

Java API client for Docker

Build with Maven

Prerequisites:

Java min 1.8
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

Maven repository modules

Since 3.2.0 project provides 3 transports:

docker-java-transport-jersey (doesn't support streams)
docker-java-transport-netty
docker-java-transport-okhttp

For backward compatibility docker-java module keeping dependency only on jersey and netty transports.

<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

trajano/docker-java