java 访问docker的环境

Posted 2021-01-03 李悠然

1.   配置环境

新增 ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix://var/run/docker.sock

[email protected]:~# nano /lib/systemd/system/docker.service
[email protected]:~# cat  /lib/systemd/system/docker.service
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target docker.socket firewalld.service
Wants=network-online.target
Requires=docker.socket

[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix://var/run/docker.sock
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=1048576
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNPROC=infinity
LimitCORE=infinity
# Uncomment TasksMax if your systemd version supports it.
# Only systemd 226 and above support this version.
TasksMax=infinity
TimeoutStartSec=0
# set delegate yes so that systemd does not reset the cgroups of docker containers
Delegate=yes
# kill only the docker process, not all processes in the cgroup
KillMode=process
# restart the docker process if it exits prematurely
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s

[Install]
WantedBy=multi-user.target
重启docker

[email protected]:~# service docker reload
Warning: docker.service changed on disk. Run ‘systemctl daemon-reload‘ to reload units.
[email protected]:~# systemctl daemon-reload
[email protected]:~# systemctl docker restart
Unknown operation docker.
[email protected]:~# service docker restart
检测配置的端口

[email protected]:~# netstat -antp | grep 2375
tcp6       0      0 :::2375                 :::*                    LISTEN      19143/dockerd  

2. Java访问客户端

加载docker-java的jar

<!-- https://mvnrepository.com/artifact/com.github.docker-java/docker-java -->
<dependency>
   <groupId>com.github.docker-java</groupId>
   <artifactId>docker-java</artifactId>
   <version>3.0.14</version>
</dependency>

初始化客户端访问
DockerClient dockerClient = DockerClientBuilder.getInstance().build();