详解Docker退出容器不关闭容器的方法

进入docker容器后如果退出容器，容器就会变成Exited的状态，那么如何退出容器让容器不关闭呢？

如果要正常退出不关闭容器，请按Ctrl+P+Q进行退出容器，这一点很重要，请牢记！

以下示例为退出容器但不关闭容器

[root@localhost ~]# docker attach c600c4519fc8
[root@c600c4519fc8 /]# exit
exit
[root@localhost ~]# docker ps -a
CONTAINER ID    IMAGE        COMMAND       CREATED       STATUS          PORTS        NAMES
c600c4519fc8    centos       "/bin/bash"     3 hours ago     Exited (0) 1 second ago            pensive_jackson
5a7a0d694651    busybox       "sh"        20 hours ago    Exited (0) 20 hours ago            hungry_vaughan
4b0296d18849    hello-world     "/hello"      46 hours ago    Exited (0) 46 hours ago            hopeful_yonath
[root@localhost ~]# docker start pensive_jackson
pensive_jackson
[root@localhost ~]# docker attach c600c4519fc8
Ctrl + P + Q 
[root@c600c4519fc8 /]# read escape sequence
[root@localhost ~]# docker ps -a
CONTAINER ID    IMAGE        COMMAND       CREATED       STATUS          PORTS        NAMES
c600c4519fc8    centos       "/bin/bash"     3 hours ago     Up 22 seconds                 pensive_jackson
5a7a0d694651    busybox       "sh"        20 hours ago    Exited (0) 20 hours ago            hungry_vaughan
4b0296d18849    hello-world     "/hello"      46 hours ago    Exited (0) 46 hours ago            hopeful_yonath

事实上我们可以在启动容器的时候就进行配置，加入-d参数来启动容器，当然，这条命令仅限于启动全新的容器，启动关闭的容器是不可以的。

Tips 1

docker run -d: 后台运行容器，并返回容器ID

以下示例为使用docker -d启动容器并退出

[root@localhost ~]# docker run -i -t -d centos /bin/bash
8521b11d5d99535d4cb0080adc5a58a4dd018ecd0751d9945f7da7ab01bec330
[root@localhost ~]# docker ps -a
CONTAINER ID    IMAGE        COMMAND       CREATED       STATUS           PORTS        NAMES
8521b11d5d99    centos       "/bin/bash"     4 seconds ago    Up 4 seconds                  eager_goldwasser
c600c4519fc8    centos       "/bin/bash"     3 hours ago     Exited (0) 28 seconds ago            pensive_jackson
5a7a0d694651    busybox       "sh"        20 hours ago    Exited (0) 20 hours ago             hungry_vaughan
4b0296d18849    hello-world     "/hello"      46 hours ago    Exited (0) 46 hours ago             hopeful_yonath
[root@localhost ~]# docker attach 8
[root@8521b11d5d99 /]# uname -r
3.10.0-514.el7.x86_64
[root@8521b11d5d99 /]# exit
exit
[root@localhost ~]# docker ps -a
CONTAINER ID    IMAGE        COMMAND       CREATED       STATUS           PORTS        NAMES
8521b11d5d99    centos       "/bin/bash"     2 minutes ago    Exited (0) 2 seconds ago            eager_goldwasser								 
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