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4-Docker命令之docker commit

作者：羊村懒王 | 2024-04-11 17:25:53

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docker commit

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]]

  1. [root@centos79 ~]# docker commit --help
  2.  
  3. Usage:  docker commit [OPTIONS] CONTAINER [REPOSITORY[:TAG]]
  4.  
  5. Create a new image from a container's changes
  6.  
  7. Aliases:
  8.   docker container commit, docker commit
  9.  
  10. Options:
  11.   -a, --author string    Author (e.g., "John Hannibal Smith <hannibal@a-team.com>")
  12.   -c, --change list      Apply Dockerfile instruction to the created image
  13.   -m, --message string   Commit message
  14.   -p, --pause            Pause container during commit (default true)
  15. [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

  1. [root@centos79 ~]# docker ps -a | grep centos-ssh
  2. 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
  3. [root@centos79 ~]# docker exec -it centos-ssh /bin/bash
  4. [root@803b6b35366a ansible]#

-->在容器内部使用vim命令

命令：

vim

  1. [root@803b6b35366a ansible]# vim
  2. bash: vim: command not found
  3. [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

  1. [root@803b6b35366a ansible]# yum install vim -y
  2. Loaded plugins: fastestmirror, ovl
  3. 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')
  4. Trying other mirror.
  5. 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')
  6. Trying other mirror.
  7. base                                                                                                            | 3.6 kB  00:00:00     
  8. extras                                                                                                          | 2.9 kB  00:00:00     
  9. updates                                                                                                         | 2.9 kB  00:00:00     
  10. Loading mirror speeds from cached hostfile
  11. Resolving Dependencies
  12. --> Running transaction check
  13. ---> Package vim-enhanced.x86_64 2:7.4.629-8.el7_9 will be installed
  14. --> Processing Dependency: vim-common = 2:7.4.629-8.el7_9 for package: 2:vim-enhanced-7.4.629-8.el7_9.x86_64
  15. --> Processing Dependency: which for package: 2:vim-enhanced-7.4.629-8.el7_9.x86_64
  16. --> Processing Dependency: libgpm.so.2()(64bit) for package: 2:vim-enhanced-7.4.629-8.el7_9.x86_64
  17. --> Running transaction check
  18. ---> Package gpm-libs.x86_64 0:1.20.7-6.el7 will be installed
  19. ---> Package vim-common.x86_64 2:7.4.629-8.el7_9 will be installed
  20. --> Processing Dependency: vim-filesystem for package: 2:vim-common-7.4.629-8.el7_9.x86_64
  21. ---> Package which.x86_64 0:2.20-7.el7 will be installed
  22. --> Running transaction check
  23. ---> Package vim-filesystem.x86_64 2:7.4.629-8.el7_9 will be installed
  24. --> Finished Dependency Resolution
  25.  
  26. Dependencies Resolved
  27.  
  28. =======================================================================================================================================
  29.  Package                            Arch                       Version                               Repository                   Size
  30. =======================================================================================================================================
  31. Installing:
  32.  vim-enhanced                       x86_64                     2:7.4.629-8.el7_9                     updates                     1.1 M
  33. Installing for dependencies:
  34.  gpm-libs                           x86_64                     1.20.7-6.el7                          base                         32 k
  35.  vim-common                         x86_64                     2:7.4.629-8.el7_9                     updates                     5.9 M
  36.  vim-filesystem                     x86_64                     2:7.4.629-8.el7_9                     updates                      11 k
  37.  which                              x86_64                     2.20-7.el7                            base                         41 k
  38.  
  39. Transaction Summary
  40. =======================================================================================================================================
  41. Install  1 Package (+4 Dependent packages)
  42.  
  43. Total download size: 7.1 M
  44. Installed size: 23 M
  45. Downloading packages:
  46. (1/5): gpm-libs-1.20.7-6.el7.x86_64.rpm                                                                         |  32 kB  00:00:08     
  47. (2/5): vim-enhanced-7.4.629-8.el7_9.x86_64.rpm                                                                  | 1.1 MB  00:00:21     
  48. (3/5): vim-filesystem-7.4.629-8.el7_9.x86_64.rpm                                                                |  11 kB  00:00:03     
  49. (4/5): which-2.20-7.el7.x86_64.rpm                                                                              |  41 kB  00:00:06     
  50. vim-common-7.4.629-8.el7_9.x86 FAILED                                                                ]   99 B/s | 3.2 MB  11:12:56 ETA 
  51. 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')
  52. Trying other mirror.
  53. vim-common-7.4.629-8.el7_9.x86 FAILED                                          
  54. 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')
  55. Trying other mirror.
  56. (5/5): vim-common-7.4.629-8.el7_9.x86_64.rpm                                                                    | 5.9 MB  00:02:02     
  57. ---------------------------------------------------------------------------------------------------------------------------------------
  58. Total                                                                                                   33 kB/s | 7.1 MB  00:03:35     
  59. Running transaction check
  60. Running transaction test
  61. Transaction test succeeded
  62. Running transaction
  63.   Installing : 2:vim-filesystem-7.4.629-8.el7_9.x86_64                                                                             1/5 
  64.   Installing : 2:vim-common-7.4.629-8.el7_9.x86_64                                                                                 2/5 
  65.   Installing : which-2.20-7.el7.x86_64                                                                                             3/5 
  66. install-info: No such file or directory for /usr/share/info/which.info.gz
  67.   Installing : gpm-libs-1.20.7-6.el7.x86_64                                                                                        4/5 
  68.   Installing : 2:vim-enhanced-7.4.629-8.el7_9.x86_64                                                                               5/5 
  69.   Verifying  : gpm-libs-1.20.7-6.el7.x86_64                                                                                        1/5 
  70.   Verifying  : 2:vim-enhanced-7.4.629-8.el7_9.x86_64                                                                               2/5 
  71.   Verifying  : which-2.20-7.el7.x86_64                                                                                             3/5 
  72.   Verifying  : 2:vim-common-7.4.629-8.el7_9.x86_64                                                                                 4/5 
  73.   Verifying  : 2:vim-filesystem-7.4.629-8.el7_9.x86_64                                                                             5/5 
  74.  
  75. Installed:
  76.   vim-enhanced.x86_64 2:7.4.629-8.el7_9                                                                                                
  77.  
  78. Dependency Installed:
  79.   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
  80.  
  81. Complete!
  82. [root@803b6b35366a ansible]# which vim
  83. /bin/vim
  84. [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

  1. [root@803b6b35366a ansible]# exit
  2. exit
  3. [root@centos79 ~]# docker commit centos-ssh centos-vim:1.0
  4. sha256:fc50e118f3914fc6e29c5727b42aaed8bd9589c18fda540bcaae30ee563a906a
  5. [root@centos79 ~]# docker images | grep centos-vim
  6. centos-vim                   1.0           fc50e118f391   29 seconds ago   1.01GB
  7. [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

  1. [root@centos79 ~]# docker run -itd -P --privileged --name centos-vim centos-vim:1.0
  2. db944665b1a0596f208b1fa2442bbf9540e6d868a885fb05edc1100f4888aeef
  3. [root@centos79 ~]# docker exec -it db944 /bin/bash
  4. [root@db944665b1a0 ansible]# which vim
  5. /bin/vim
  6. [root@db944665b1a0 ansible]#

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