docker - 通过 restAPI 访问

docker 安装请参考: docker - 环境搭建

• 修改配置

默认不支持远程访问, 需要修改配置以开启远程访问, 开启后, 可以远程执行 docker 命令

# 修改 /usr/lib/systemd/system/docker.service 文件
less /usr/lib/systemd/system/docker.service

================​
# 替换前
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
# 替换后, 端口号 2375 可自定义
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock --containerd=/run/containerd/containerd.sock
================

# 保存修改, 重启docker
systemctl daemon-reload
systemctl restart docker

• 接口文档

https://docs.docker.com/engine/api/v1.40
执行 docker versioin, 查看 API version, 获取版本号, 替换 v1.40

• java-client

<dependency>
    <groupId>com.github.docker-java</groupId>
    <artifactId>docker-java</artifactId>
    <version>3.1.2</version>
</dependency>

• 代码示例

import java.io.IOException;
import org.junit.Test;
import com.github.dockerjava.api.DockerClient;
import com.github.dockerjava.core.DefaultDockerClientConfig;
import com.github.dockerjava.core.DockerClientBuilder;
import com.github.dockerjava.core.DockerClientConfig;

public class ImageTest {

    @Test
    public void test() throws InterruptedException, IOException {
        try {
            DockerClientConfig config = DefaultDockerClientConfig.createDefaultConfigBuilder() //
                    .withDockerHost("tcp://192.168.x.x:2375") //
                    .build();
            DockerClient docker = DockerClientBuilder.getInstance(config).build();

            docker.pushImageCmd("192.168.x.x:5000/test").exec(new PushImageResultCallback()).awaitCompletion();

            List<Container> exec = docker.listContainersCmd().withNameFilter(Collections.singletonList("test")).exec();

            InspectImageResponse exec = docker.inspectImageCmd("192.168.x.x:5000/test").exec();

            docker.removeImageCmd("192.168.x.x:5000/test").exec();

            List<Image> exec = docker.listImagesCmd().withImageNameFilter("192.168.x.x:5000/test").exec();

            docker.removeImageCmd("231d40e811cd").withForce(true).exec();

            docker.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}