docker--container

[root@localhost docker_test]# docker run bigni/test3 #运行
docker so easy !
[root@localhost docker_test]# docker container ls #查看在运行的tontainer，发现没有上面运行的container，原因是上面的程序不是常驻内存的进程，程序结束后，docker便退出了。
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
[root@localhost docker_test]# docker container ls -a #查看所有container，包括退出的
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                          PORTS               NAMES
8c3e652d7321        bigni/test3         "/soeasy.sh"         seconds ago      Exited ()  seconds ago                           xenodochial_diffie
80e6e373f1d4        cfbfd0a29d1c        "/soeasy.sh"         minutes ago      Exited ()  minutes ago                           dreamy_mendel
934e574a077d        e2b5b08cc31c        "/soeasy.sh"         minutes ago      Exited ()  minutes ago                           nostalgic_lehmann
871a7d62acc1        f5620b92331c        "/soeasy2"          About an hour ago   Exited () About an hour ago                       serene_spence
72fd56c76100        hello-world         "/hello"             hours ago        Exited ()  hours ago                             trusting_pasteur
[root@localhost docker_test]# 
[root@1c4586fe95ee /]# touch test.sh  #container是在image之上创建的一个可读写的layer
[root@1c4586fe95ee /]# ls
anaconda-post.log  bin  dev  etc  home  lib  lib64  media  mnt  opt  proc  root  run  sbin  srv  sys  test.sh  tmp  usr  var
[root@1c4586fe95ee /]# 

想办法让常驻内存，比如可以进入 centos 交互式运行

[root@localhost docker_test]# docker run -it centos
[root@1c4586fe95ee /]# ls
anaconda-post.log  bin  dev  etc  home  lib  lib64  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var
[root@1c4586fe95ee /]# ifconfig #这个centos发行版很多工具没装
bash: ifconfig: command not found
[root@1c4586fe95ee /]# vim
bash: vim: command not found
[root@1c4586fe95ee /]# vi
[root@1c4586fe95ee /]# 

进入到centos操作系统了，这时我在宿主机另起一个session查看containers

[root@localhost docker_test]# docker container ls
CONTAINER ID        IMAGE               COMMAND             CREATED              STATUS              PORTS               NAMES
1c4586fe95ee        centos              "/bin/bash"         About a minute ago   Up About a minute                       agitated_banzai
[root@localhost docker_test]#