gitolite-cgit based on alpine image

What is this image?

ghcr.io/bacnh85/docker-gitolite-cgit is a Docker image with cgit and gitolite running on top of alpine base image. Dockerfile is available at Github repo.

Usage

1. Pull the image

docker pull ghcr.io/bacnh85/docker-gitolite-cgit:latest

2. Run the image with provided environment:

docker run -e SSH_KEY="$(cat ~/.ssh/id_rsa.pub)" -e SSH_KEY_NAME="$(whoami)" -p 22:22 -p 80:80 -p 9418:9418 -v repo:/var/lib/git/ ghcr.io/bacnh85/docker-gitolite-cgit:latest

Environment

• SSH_KEY: Public key of gitolite admin
• SSH_KEY_NAME: Name of gitolite admin
• CGIT_CLONE_PREFIX: cgit clone prefix to display on each repository. For example: my web url is: https://git.bacnh.com, the clone URL should be: ssh://git@git.bacnh.com
• CGIT_ROOT_TITLE: Text printed as heading on the repository index page. Default value: "Git Repository Browser".

Exposed ports

• Port 22: for SSH clone
• Port 80: for cgit webpage running on Nginx
• Port 9418: for git daemon protocol

Volume

• /var/lib/git: gitolite home folder, store all repositories, gitolite-admin repo, ...
• /etc/ssh/: store all generated SSH server key

How to interact with git server

Cgit webpage: http://<server_ip>/

Supported clone method:

• SSH: authentication with gitolite configuration inside gitolite-admin. For more information, pls refer to (basic administration](https://gitolite.com/gitolite/basic-admin.html). Syntax: git clone ssh://git@<server_ip>/<repo_name>
• HTTP: enable-http-clone=1 by default, which let cgit act as a dumb HTTP enpoint for git clones. You can disable that by edit /etc/cgitrc. I may consider to add more feature, so you can set config from docker run or docker-compose.yml. git push is not supported via HTTP at this moment. Syntax: git clone http://<server_ip>/<repo_name>
• GIT: git daemon is enabled by default with upload-pack service (this serves git fetch-pack and git ls-remote clients), allowing anonymous fetch, clone. Syntax: git clone git://<server_ip>/<repo_path>

Docker-compose

1. Pull the image:

docker pull ghcr.io/bacnh85/docker-gitolite-cgit:latest

2. Create environment file

In this repo, I create gitolite admin with the host public key and username. In case, you are running this on server, you need to enter SSH_KEY and SSH_KEY_NAME into config.env:

#
# Gitolite options
#
SSH_KEY=<your public key content>
SSH_KEY_NAME=<your gitolite name>
#
# Cgit options
#
CGIT_CLONE_PREFIX=<cgit clone prefix like: ssh://git@foo.org git://foo.org >
CGIT_ROOT_TITLE=Git Repository Browser

For convience, I create a script for user who use the public key and name from the host running Docker:

# change ssh_key, ssh_key_name to reflect your current setup
SSH_KEY=$(cat ~/.ssh/id_rsa.pub)
SSH_KEY_NAME=$(whoami)

sed -i.bak \
    -e "s#SSH_KEY=.*#SSH_KEY=${SSH_KEY}#g" \
    -e "s#SSH_KEY_NAME=.*#SSH_KEY_NAME=${SSH_KEY_NAME}#g" \
    "$(dirname "$0")/config.env"

3. Create docker-compose.yml:

version: '3'

services:
  app:
    image: ghcr.io/bacnh85/docker-gitolite-cgit:latest
    container_name: gitolite-cgit
    env_file: config.env
    volumes: 
      - git:/var/lib/git/
    ports:
      - 22:22
      - 80:80
      - 9418:9418
    tty: true
volumes: 
  git:

Then power-on your container:

docker-compose up -d

Customize cgit configuration

As there are many cgit configuration, you can create cgitrc configure and map to /etc/cgitrc

# Copy cgitrc from existing container
docker cp gitolite-cgit:/etc/cgitrc .

Modify the docker-compose.yml:

version: '3'

services:
  app:
    image: ghcr.io/bacnh85/docker-gitolite-cgit:latest
    container_name: gitolite-cgit
    env_file: config.env
    volumes: 
      - git:/var/lib/git/
      - ./cgitrc:/etc/cgitrc
    ports:
      - 22:22
      - 80:80
      - 9418:9418
    tty: true
volumes: 
  git:

Build docker image

git clone https://github.com/bacnh85/docker-gitolite-cgit.git
cd docker-gitolite-cgit
docker build gitolite-cgit -t ghcr.io/bacnh85/docker-gitolite-cgit:latest

CI/CD

This repository uses GitHub Actions to automatically build and publish the Docker image to GitHub Container Registry (ghcr.io).

Triggers

Trigger	Description
Push to main	Builds when files in gitolite-cgit/ or workflow files change
Weekly schedule	Rebuilds every Monday at 06:00 UTC to pick up Alpine base image updates
Daily check	Checks if the Alpine base image has been updated and triggers a rebuild if needed
Manual (workflow_dispatch)	Trigger a build on demand from the Actions tab

Multi-architecture

Images are built for both linux/amd64 and linux/arm64 platforms.

Available tags

• latest — always points to the latest build from main
• sha-<commit> — tagged with the short commit SHA for reproducibility