1. 打开docker的远程api访问(参考:https://blog.csdn.net/csde12/article/details/70240721)
sudo vi /etc/systemd/system/docker.service
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock
2. 重启守护进程
sudo systemctl daemon-reload
sudo systemctl restart docker
3. Jenkins的全局变量中增加DOCKER_HOST=tcp://localhost:2375