1.docker attach介绍

docker attach命令是用来进入一个正在运行的docker容器

2.docker attach用法

docker attach [参数] container

[root@centos79 ~]# docker attach --help

Usage:  docker attach [OPTIONS] CONTAINER

Attach local standard input, output, and error streams to a running container

Aliases:
  docker container attach, docker attach

Options:
      --detach-keys string   Override the key sequence for detaching a container
      --no-stdin             Do not attach STDIN
      --sig-proxy            Proxy all received signals to the process (default true)
[root@centos79 ~]#

3.实例

3.1.进入启动的docker容器

命令：

docker attach 800d

[root@centos79 ~]# docker ps -a | grep 800d
800d0759315f   centos:centos7         "/bin/bash"               20 hours ago   Up 14 seconds                                                                                                      gracious_bohr
[root@centos79 ~]# docker attach 800d
[root@800d0759315f /]# exit
exit
[root@centos79 ~]# docker ps -a | grep 800d
800d0759315f   centos:centos7         "/bin/bash"               20 hours ago   Exited (0) 6 seconds ago                                                                                           gracious_bohr
[root@centos79 ~]#

docker attach containerid/containername命令进入到正在运行的docker容器后，输入exit命令或Ctrl + d退出容器后，原来正在运行的容器也会停止。

3.2.进入启动的容器退出不停止

命令：

docker attach 800d

[root@centos79 ~]# docker ps -a | grep 800d
800d0759315f   centos:centos7         "/bin/bash"               20 hours ago   Up 3 seconds                                                                                                       gracious_bohr
[root@centos79 ~]# docker attach 800d
[root@800d0759315f /]# read escape sequence
[root@centos79 ~]# docker ps -a | grep 800d
800d0759315f   centos:centos7         "/bin/bash"               20 hours ago   Up 27 seconds                                                                                                      gracious_bohr
[root@centos79 ~]#

docker attach containerid/containername命令进入到正在运行的docker容器后，输入Ctrl +p+q退出容器后，原来正在运行的容器不会停止

另外，使用docker exec命令也可以进入正在运行的docker容器，不过输入exit命令或Ctrl +d退出容器后，原来正在运行的容器不会停止，这是docker exec命令和docker attach命令的区别