1.3 Docker 基于已有镜像的容器创建镜像

 运行docker run后，进入到该容器中，我们做一些变更，比如安装一些东西，然后针对这个容器进行创建新的镜像

 把已经退出的容器启动起来

root@ubuntu:~# docker ps -a

CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                      PORTS               NAMES

81678fc4d6c7        ubuntu:latest       "/bin/bash"         35 minutes ago      Exited (0) 32 minutes ago                       happy_newton

root@ubuntu:~# docker start 816

816

root@ubuntu:~# docker ps

CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

81678fc4d6c7        ubuntu:latest       "/bin/bash"         36 minutes ago      Up 6 seconds                            happy_newton

 进入这个已经启动的容器

root@ubuntu:~# docker exec -it 816 /bin/bash

root@81678fc4d6c7:/#

root@81678fc4d6c7:/# apt-get install -y net-tools

root@81678fc4d6c7:/# apt-get install -y wget

 查看网卡信息

root@81678fc4d6c7:/# ifconfig

eth0      Link encap:Ethernet  HWaddr 02:42:c0:a8:2a:03

          inet addr:192.168.42.3  Bcast:0.0.0.0  Mask:255.255.255.0

          inet6 addr: fe80::42:c0ff:fea8:2a03/64 Scope:Link

          UP BROADCAST RUNNING  MTU:1500  Metric:1

          RX packets:18287 errors:0 dropped:0 overruns:0 frame:0

          TX packets:1814 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:27632961 (27.6 MB)  TX bytes:125274 (125.2 KB)



lo        Link encap:Local Loopback

          inet addr:127.0.0.1  Mask:255.0.0.0

          inet6 addr: ::1/128 Scope:Host

          UP LOOPBACK RUNNING  MTU:65536  Metric:1

          RX packets:0 errors:0 dropped:0 overruns:0 frame:0

          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

 创建新镜像

 docker commit -m “change somth” -a “somebody info” container_id new_name （id可以通过docker ps -a获得）

root@ubuntu:~# docker commit -m "ubuntu_with_nettools_and_wget" -a "user1" 81678fc4d6c7 ubuntu_with_net

45d4c91e72cee9b9fc9b2b3f05542e33b96631fefea115fbf62ae2b827a27952

root@ubuntu:~# docker images

REPOSITORY          TAG                 IMAGE ID            CREATED              VIRTUAL SIZE

ubuntu_with_net     latest              45d4c91e72ce        About a minute ago   176.7 MB

ubuntu              v1                  ac8b2a2b477b        37 hours ago         125.2 MB

test1               latest              ac8b2a2b477b        37 hours ago         125.2 MB

test1               v1.0                ac8b2a2b477b        37 hours ago         125.2 MB

 这个命令有些像svn的提交，-m 加一些改动信息，-a 指定作者相关信息，816这一串为容器ID，再后面为新镜像的名字。