docker containner挂掉，无法exec进入bash，如何修改文件的终极解决方法

场景：

Nginx在bash里面配置的时候挂掉了，然后docker start不起来，exec bash进不去，造成无法再改里面的文件了

解决方法：

1，docker ps –a 可以查到所有docker，包括没有运行的，找到containner ID

[root@hecs-29489 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
35a903217fb7 nginx "/docker-entrypoint.…" 11 days ago Exited (1) 9 minutes ago nginx
43030fc53a87 wordpress "docker-entrypoint.s…" 12 days ago Up 12 days 0.0.0.0:81->80/tcp, :::81->80/tcp wpJesus
e03c1b470c42 mysql "docker-entrypoint.s…" 12 days ago Up 12 days 0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp mysql

2，用docker CP命令，往出来拷文件，改好后，再拷进去 。

[root@hecs-29489 ~]# docker cp 35a903217fb7:/etc/nginx/conf.d/default.conf /root
[root@hecs-29489 ~]# cd /root
[root@hecs-29489 ~]# ls default.conf HostGuardAgent_Linux64_V1.12.50.rpm.sha256 hostguard_setup_config.dat HwAgentInstall_64.sh scs1627613284839_weyomusic.com_server.crt scs1627613284839_weyomusic.com_server.key
[root@hecs-29489 ~]# vi default.conf
[root@hecs-29489 ~]# docker cp default.conf 35a903217fb7:/etc/nginx/conf.d/ [root@hecs-29489 ~]# docker start nginx
nginx
[root@hecs-29489 ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
35a903217fb7 nginx "/docker-entrypoint.…" 11 days ago Up 1 second 0.0.0.0:80->80/tcp, :::80->80/tcp nginx
43030fc53a87 wordpress "docker-entrypoint.s…" 12 days ago Up 12 days 0.0.0.0:81->80/tcp, :::81->80/tcp wpJesus
e03c1b470c42 mysql "docker-entrypoint.s…" 12 days ago Up 12 days 0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp mysql