1.docker commit介绍
docker commit命令是用于根据docker容器的改变创建一个新的docker镜像
2.docker commit用法
docker commit [参数] container [repository[:tag]]
[root@centos79 ~]# docker commit --help
Usage: docker commit [OPTIONS] CONTAINER [REPOSITORY[:TAG]]
Create a new image from a container's changes
Aliases:
docker container commit, docker commit
Options:
-a, --author string Author (e.g., "John Hannibal Smith <[email protected]>")
-c, --change list Apply Dockerfile instruction to the created image
-m, --message string Commit message
-p, --pause Pause container during commit (default true)
[root@centos79 ~]#
3.实例
3.1.基于容器更改创建新镜像
-->进入运行中的docker容器
命令：
docker exec -it centos-ssh /bin/bash
[root@centos79 ~]# docker ps -a | grep centos-ssh
803b6b35366a centos-ssh:1.0 "/bin/sh -c '/usr/sb…" 12 minutes ago Up 12 minutes 0.0.0.0:32768->22/tcp, :::32768->22/tcp centos-ssh
[root@centos79 ~]# docker exec -it centos-ssh /bin/bash
[root@803b6b35366a ansible]#
-->在容器内部使用vim命令
命令：
vim
[root@803b6b35366a ansible]# vim
bash: vim: command not found
[root@803b6b35366a ansible]#
提示没有vim命令
-->docker容器内安装vim命令
命令：
yum install vim -y
[root@803b6b35366a ansible]# yum install vim -y
Loaded plugins: fastestmirror, ovl
http://mirrors.163.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.163.com/centos/7/os/x86_64/repodata/repomd.xml: (28, 'Operation too slow. Less than 1000 bytes/sec transferred the last 30 seconds')
Trying other mirror.
http://mirrors.163.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.163.com/centos/7/os/x86_64/repodata/repomd.xml: (28, 'Operation too slow. Less than 1000 bytes/sec transferred the last 30 seconds')
Trying other mirror.
base | 3.6 kB 00:00:00
extras | 2.9 kB 00:00:00
updates | 2.9 kB 00:00:00
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package vim-enhanced.x86_64 2:7.4.629-8.el7_9 will be installed
--> Processing Dependency: vim-common = 2:7.4.629-8.el7_9 for package: 2:vim-enhanced-7.4.629-8.el7_9.x86_64
--> Processing Dependency: which for package: 2:vim-enhanced-7.4.629-8.el7_9.x86_64
--> Processing Dependency: libgpm.so.2()(64bit) for package: 2:vim-enhanced-7.4.629-8.el7_9.x86_64
--> Running transaction check
---> Package gpm-libs.x86_64 0:1.20.7-6.el7 will be installed
---> Package vim-common.x86_64 2:7.4.629-8.el7_9 will be installed
--> Processing Dependency: vim-filesystem for package: 2:vim-common-7.4.629-8.el7_9.x86_64
---> Package which.x86_64 0:2.20-7.el7 will be installed
--> Running transaction check
---> Package vim-filesystem.x86_64 2:7.4.629-8.el7_9 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
=======================================================================================================================================
Package Arch Version Repository Size
=======================================================================================================================================
Installing:
vim-enhanced x86_64 2:7.4.629-8.el7_9 updates 1.1 M
Installing for dependencies:
gpm-libs x86_64 1.20.7-6.el7 base 32 k
vim-common x86_64 2:7.4.629-8.el7_9 updates 5.9 M
vim-filesystem x86_64 2:7.4.629-8.el7_9 updates 11 k
which x86_64 2.20-7.el7 base 41 k
Transaction Summary
=======================================================================================================================================
Install 1 Package (+4 Dependent packages)
Total download size: 7.1 M
Installed size: 23 M
Downloading packages:
(1/5): gpm-libs-1.20.7-6.el7.x86_64.rpm | 32 kB 00:00:08
(2/5): vim-enhanced-7.4.629-8.el7_9.x86_64.rpm | 1.1 MB 00:00:21
(3/5): vim-filesystem-7.4.629-8.el7_9.x86_64.rpm | 11 kB 00:00:03
(4/5): which-2.20-7.el7.x86_64.rpm | 41 kB 00:00:06
vim-common-7.4.629-8.el7_9.x86 FAILED ] 99 B/s | 3.2 MB 11:12:56 ETA
http://mirrors.163.com/centos/7/updates/x86_64/Packages/vim-common-7.4.629-8.el7_9.x86_64.rpm: [Errno 12] Timeout on http://mirrors.163.com/centos/7/updates/x86_64/Packages/vim-common-7.4.629-8.el7_9.x86_64.rpm: (28, 'Operation too slow. Less than 1000 bytes/sec transferred the last 30 seconds')
Trying other mirror.
vim-common-7.4.629-8.el7_9.x86 FAILED
http://mirrors.163.com/centos/7/updates/x86_64/Packages/vim-common-7.4.629-8.el7_9.x86_64.rpm: [Errno 12] Timeout on http://mirrors.163.com/centos/7/updates/x86_64/Packages/vim-common-7.4.629-8.el7_9.x86_64.rpm: (28, 'Operation too slow. Less than 1000 bytes/sec transferred the last 30 seconds')
Trying other mirror.
(5/5): vim-common-7.4.629-8.el7_9.x86_64.rpm | 5.9 MB 00:02:02
---------------------------------------------------------------------------------------------------------------------------------------
Total 33 kB/s | 7.1 MB 00:03:35
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : 2:vim-filesystem-7.4.629-8.el7_9.x86_64 1/5
Installing : 2:vim-common-7.4.629-8.el7_9.x86_64 2/5
Installing : which-2.20-7.el7.x86_64 3/5
install-info: No such file or directory for /usr/share/info/which.info.gz
Installing : gpm-libs-1.20.7-6.el7.x86_64 4/5
Installing : 2:vim-enhanced-7.4.629-8.el7_9.x86_64 5/5
Verifying : gpm-libs-1.20.7-6.el7.x86_64 1/5
Verifying : 2:vim-enhanced-7.4.629-8.el7_9.x86_64 2/5
Verifying : which-2.20-7.el7.x86_64 3/5
Verifying : 2:vim-common-7.4.629-8.el7_9.x86_64 4/5
Verifying : 2:vim-filesystem-7.4.629-8.el7_9.x86_64 5/5
Installed:
vim-enhanced.x86_64 2:7.4.629-8.el7_9
Dependency Installed:
gpm-libs.x86_64 0:1.20.7-6.el7 vim-common.x86_64 2:7.4.629-8.el7_9 vim-filesystem.x86_64 2:7.4.629-8.el7_9 which.x86_64 0:2.20-7.el7
Complete!
[root@803b6b35366a ansible]# which vim
/bin/vim
[root@803b6b35366a ansible]# -->退出docker容器，使用docker commit命令将此已经安装vim命令的docker容器进行commit，以便未来使用
命令：
exit
docker commit centos-ssh centos-vim:1.0
docker images | grep -i centos-vim
[root@803b6b35366a ansible]# exit
exit
[root@centos79 ~]# docker commit centos-ssh centos-vim:1.0
sha256:fc50e118f3914fc6e29c5727b42aaed8bd9589c18fda540bcaae30ee563a906a
[root@centos79 ~]# docker images | grep centos-vim
centos-vim 1.0 fc50e118f391 29 seconds ago 1.01GB
[root@centos79 ~]#
-->基于新的镜像进行验证
命令：
docker run -itd -P --privileged --name centos-vim centos-vim:1.0
docker exec -it db944 /bin/bash
[root@centos79 ~]# docker run -itd -P --privileged --name centos-vim centos-vim:1.0
db944665b1a0596f208b1fa2442bbf9540e6d868a885fb05edc1100f4888aeef
[root@centos79 ~]# docker exec -it db944 /bin/bash
[root@db944665b1a0 ansible]# which vim
/bin/vim
[root@db944665b1a0 ansible]#