参考教程：https://docs.docker.com/engine/reference/commandline/cp/
环境
- virtual box 6.1
- centos 7.8
- docker 19.03
命令格式
docker cp [OPTIONS] SRC_PATH|- CONTAINER:DEST_PATH
使用 cp 命令可以将容器内的文件拷贝到宿主机，或者从宿主机拷贝文件到容器中。
示例
从容器拷贝到主机
[root@master ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1d06decda260 nginx "/docker-entrypoint.…" 46 hours ago Up 8 minutes 80/tcp strange_mendel
[root@master ~]# docker cp 1d:/usr/share/nginx/html/index.html ~
[root@master ~]# ls
anaconda-ks.cfg docker index.html
[root@master ~]# cat index.html
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
从主机拷贝到容器
[root@master ~]# vim index.html
[root@master ~]# docker cp index 1d:/usr/share/nginx/html
lstat /root/index: no such file or directory
[root@master ~]# docker cp index.html 1d:/usr/share/nginx/html/
[root@master ~]#
root@1d06decda260:/usr/share/nginx/html# curl localhost:80
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to docker!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
总结
介绍了 cp 命令的使用，可以将文件从容器拷贝出来或者拷贝进去。