Docker学习视频建立自定义镜像: commit 根据容器的更改创建新图像

docker commit 根据容器的更改创建新图像

将容器的文件更改或设置提交到新映像中可能很有用。这使您可以通过运行交互式外壳程序来调试容器，或将工作数据集导出到另一台服务器。通常，最好使用Dockerfiles以文档化和可维护的方式来管理映像。

• Docker 相关文章
• https://www.lyvba.com/index.php/tag/docker/

例子 commit 提交容器

$  docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED              STATUS                          PORTS     NAMES
ba21356c8dea   debian        "bash"     About a minute ago   Exited (0) 15 seconds ago                 peaceful_sammet

$  docker commit ba21356c8dea  myphp
sha256:b795a0199077c8b48ff48193dee3268b517df99cdd258dc49a6929694b6ce57b

$  docker images
REPOSITORY    TAG       IMAGE ID       CREATED          SIZE
myphp         latest    b795a0199077   15 seconds ago   271MB
debian        latest    82bd5ee7b1c5   3 weeks ago      124MB

查看镜像历史

$  docker history myphp
IMAGE          CREATED          CREATED BY                                      SIZE      COMMENT
b795a0199077   25 seconds ago   bash                                            147MB
82bd5ee7b1c5   3 weeks ago      /bin/sh -c #(nop)  CMD ["bash"]                 0B
<missing>      3 weeks ago      /bin/sh -c #(nop) ADD file:1fedf68870782f1b4…   124MB    

使用myphp镜像建立容器

$  docker run -itd myphp bash
46b98f18d17249674b7cdebd1161a65285aaafb94f193cd7ab76294571334224

$  docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED          STATUS          PORTS     NAMES
46b98f18d172   myphp     "bash"    16 seconds ago   Up 14 seconds             zealous_mirzakhani

$  docker exec  -it 46b98f18d172 php -v
PHP 7.4.21 (cli) (built: Jul  2 2021 03:59:48) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.21, Copyright (c), by Zend Technologies

$  docker exec  -it 46b98f18d172  bash