Docker 小型电脑

Docker和宿主Host的关系如上图所示。

查看docker

# docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                     PORTS                                            NAMES
51bf8220a09f        redis:5.0.3         "docker-entrypoint..."   4 months ago        Exited (139) 7 weeks ago                                                    sun_redis
c79ea0e16348        idoop/zentao        "docker-entrypoint"      5 months ago        Up 3 months (healthy)      0.0.0.0:10080->80/tcp, 0.0.0.0:13306->3306/tcp   zentao
abae3dd5c421        minio/minio         "/usr/bin/docker-e..."   6 months ago        Up 3 months                0.0.0.0:9000->9000/tcp                           sun_minio
58b35062d215        mysql:5.7           "docker-entrypoint..."   6 months ago        Up 3 months                0.0.0.0:3306->3306/tcp, 33060/tcp                sun_mysql

进入docker

docker exec -it 容器id /bin/bash

# docker exec -it c79ea0e16348 /bin/bash
root@c79ea0e16348:/# ll
total 72
drwxr-xr-x   1 root root 4096 Nov 23 03:34 ./
drwxr-xr-x   1 root root 4096 Nov 23 03:34 ../
-rwxr-xr-x   1 root root    0 Nov 23 03:34 .dockerenv*
drwxr-xr-x   2 root root 4096 May 26  2020 bin/
drwxr-xr-x   2 root root 4096 Apr 24  2018 boot/
drwxr-xr-x   5 root root  340 Jan 27 01:47 dev/
drwxr-xr-x   1 root root 4096 Nov 23 03:34 etc/
drwxr-xr-x   2 root root 4096 Apr 24  2018 home/
drwxr-xr-x   1 root root 4096 May 23  2017 lib/
drwxr-xr-x   2 root root 4096 May 26  2020 lib64/
drwxr-xr-x   2 root root 4096 May 26  2020 media/
drwxr-xr-x   2 root root 4096 May 26  2020 mnt/
drwxr-xr-x   1 root root 4096 Nov 23 03:34 opt/
dr-xr-xr-x 144 root root    0 Jan 27 01:47 proc/
drwx------   2 root root 4096 May 26  2020 root/
drwxr-xr-x   1 root root 4096 Nov 23 03:34 run/
drwxr-xr-x   1 root root 4096 Jun 17  2020 sbin/
drwxr-xr-x   2 root root 4096 May 26  2020 srv/
dr-xr-xr-x  13 root root    0 Nov 21 06:46 sys/
drwxrwxrwt   1 root root 4096 May 12 07:26 tmp/
drwxr-xr-x   1 root root 4096 May 26  2020 usr/
drwxr-xr-x   1 root root 4096 May 26  2020 var/

出去

# exit
exit

导出文件

docker cp 容器id:容器文件路径 宿主目录路径

docker cp c79ea0e16348:/opt/test.txt /opt

停止一个容器

# docker stop c79ea0e16348
c79ea0e16348

开启一个容器

# docker start c79ea0e16348
c79ea0e16348

停止后，容器依然存在，只是没有运行罢了，类似于进程杀死。