创建容器时添加参数 --restart=always 后，当 docker 重启时，容器自动启动。
使用方法：
docker container update --restart=always 容器名字
操作实例如下：
[root@localhost mnt]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 46cdfc60b7a6 nginx "nginx -g ‘daemon ..." About a minute ago Up 42 seconds 80/tcp n3 79d55a734c26 nginx "nginx -g ‘daemon ..." About a minute ago Up 42 seconds 80/tcp n2 f7b2206c019d nginx "nginx -g ‘daemon ..." About a minute ago Up 46 seconds 80/tcp n1 [root@localhost mnt]# docker container update --restart=always n1 n1 [root@localhost mnt]# systemctl restart docker [root@localhost mnt]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 46cdfc60b7a6 nginx "nginx -g ‘daemon ..." 2 minutes ago Exited (0) 5 seconds ago n3 79d55a734c26 nginx "nginx -g ‘daemon ..." 2 minutes ago Exited (0) 5 seconds ago n2 f7b2206c019d nginx "nginx -g ‘daemon ..." 2 minutes ago Up 2 seconds 80/tcp n1
原文：https://www.cnblogs.com/jtlgb/p/12220815.html