Use Docker to build a Git image using the clone repository

Overview

I have been using Docker for more than a year. Recently, I realized that when I was quickly orchestrating services, the git used in the shell script was still native.

So I decided to containerize git, searched on dockerhub, and found this image with a relatively high download volume

After looking at the dockerfile, I feel that it is not suitable for the needs

There are no volumes or ssh provided here. It is not possible to map the repository to the host machine, nor is there a function to clone a private repository (whisper: both are possible, but inconvenient). Other gitclient images are similar.

I can only reinvent the wheel myself.

Mirror address

The image in this article is pushed to dockerhub. You can use it directly if needed: https://hub.docker.com/r/wuliangxue/git

wheel

First, you need a Docker Hub account, and then log in to the server using Docker to push the image to the Docker Hub repository, which will facilitate future migrations.

Create a git.dockerfile file in any directory

In the Dockerfile, enter the following

Let me briefly explain here that originally a mirror based on Ubuntu 18.04 was provided, but the size was too large, so it was replaced with Alpine. Domestic users need to switch the Linux software source to a domestic mirror, otherwise various problems will arise when installing the software. This image itself is for cloning projects, so only git and ssh are installed. The following is to prepare for cloning the private warehouse and open the corresponding ssh directory volume. Since the working directory is set, the default project is in the /git/repo directory when git clone. When using a mirror, just mount this directory.

Build the image

Enter the command: docker build -t wuliangxue/git:0.1-alpine -f git.dockerfile .

When Successfully appears, it means the image is built successfully.

Here we compare the sizes of images built based on Ubuntu 18.04. The image with the tag 0.1 is built based on Ubuntu 18.04 [187M], and the image with the tag 0.1-alpine is built based on alpine:3.12 [30.1M]

Using Mirror

First, use the image you just built to clone a public repository and execute the following command

docker run --rm --name git \
	-v "$(pwd)":/git/repo wuliangxue/git:0.1-alpine \
	git clone https://github.com/docker-library/mysql.git 

This repository has been cloned.

If you want to view the details of the clone, you can add -it to the previous command.

docker run -it --rm --name git \
	-v "$(pwd)":/git/repo wuliangxue/git:0.1-alpine \
	git clone https://github.com/docker-library/mysql.git 

What should I do when I need to clone a private warehouse? ?
You can mount the ssh public and private keys into the container.
Execute the following command [Note that for demonstration purposes, I put the public and private keys directly in the current directory]

docker run -it --rm --name git \
-v "$(pwd)":/git/repo \
-v "$(pwd)/id_rsa":/root/.ssh/id_rsa \
-v "$(pwd)/id_rsa.pub":/root/.ssh/id_rsa.pub \
wuliangxue/git:0.1-alpine git clone [email protected]:wuliangxue/douyu.git 

Note that the -it parameter must be added here, because when you clone a private repository for the first time, git does not know the authenticity of the address (there is no record in the known_hosts file, and there is no such file for the first use), so it will ask. If there is no -it parameter and the terminal interaction function is not enabled, the clone will fail directly.

Enter yes and press Enter to clone the private warehouse.

Finally, push this wheel to Dockerhub so that you can directly pull it and use it next time you change the server.

This is the end of this article about using Docker to build a Git image using clone repository. For more information about Docker building Git image, please search for previous articles on 123WORDPRESS.COM or continue to browse the following related articles. I hope everyone will support 123WORDPRESS.COM in the future!