基于已有镜像的容器创建镜像

启动Docker

[root@localhost ~]# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
[root@localhost ~]# docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                    PORTS               NAMES
db70bb3f6068        centos              "/bin/bash"         27 hours ago        Exited (0) 27 hours ago                       serene_wright
[root@localhost ~]# docker start db70bb3f6068
db70bb3f6068
[root@localhost ~]# docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
db70bb3f6068        centos              "/bin/bash"         28 hours ago        Up 55 minutes                           serene_wright
[root@localhost ~]# docker exec -it db70bb3f6068 /bin/bash
[root@db70bb3f6068 /]#

更改

[root@db70bb3f6068 /]# wget
bash: wget: command not found
[root@db70bb3f6068 /]# yum install -y net-tools wget

提交新镜像

[root@db70bb3f6068 /]# exit
exit
[root@localhost ~]# docker commit -m "cantos_with_nettools_and_wget" -a "root" db70bb3f6068 centos_with_net
[root@localhost ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
centos_with_net     latest              3e8ea8607f08        24 seconds ago      294.9 MB
centos              latest              9baab0af79c4        9 days ago          196.7 MB