Detailed explanation of the use of Docker commit

Sometimes you need to install certain dependencies in the base image. If you write the commands in the Dockerfile, some dependent software will download very slowly, and it will take a long time to build the image. So it is best to install a new image that contains the dependent libraries.

Docker provides commit to achieve

For example, I have a python image, which is relatively streamlined. The two dependencies freetds-dev and unixodbc-dev are missing.

1. Run the image first

docker run -it --name python docker.io/python:3.6.4 /bin/bash

/bin/bash enters the container to interact

2. Execute the installation command

root@39eaa5aa7332:/code# apt-get install freetds-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done

root@39eaa5aa7332:/code# apt-get install unixodbc-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done

After the installation is complete, press ctrl+p+q to exit the container.

3. Package the container into an image and execute docker commit

[root@CentOS ~]# docker commit 39eaa5aa7332 python3.6.4-dev
sha256:ca46b1ed99abc1338881a55a043ee9670a66601530b3f2e63f41eb949b91e84d

Then execute docker images to see this image

The above is a detailed explanation of the use of Docker commit. For more information about the use of Docker commit, please pay attention to other related articles on 123WORDPRESS.COM!