BorgBackup Server Docker

This repository provides a Docker image for running a BorgBackup server with SSH access. It is based on Alpine Linux and is designed for secure, containerized backup operations using Borg.

Features

• BorgBackup installed in a chroot environment for enhanced security
• SSH server for secure remote access
• Customizable SSH authorized keys for user authentication
• Easy integration with Docker Compose

Quick Start (Recommended)

Use the prebuilt image from GitHub Container Registry:

services:
  borgbackup-server:
    image: ghcr.io/pm-dennis/borgbackup-server:latest
    environment:
      - SSH_AUTHORIZED_KEYS=ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAI... user@host
    ports:
      - "2222:22"
    volumes:
      - ./data:/chroot/home

• Replace the value of SSH_AUTHORIZED_KEYS with your public SSH key(s).
• Mount your backup data to /chroot/home.

Advanced Setup (Custom Build)

If you need to customize the BorgBackup server (e.g., change the username), you can build the image yourself:

docker build -t borgbackup-server .

Build Arguments

• BORG_USER (default: borgbackup): The username for the BorgBackup server. Set as a build argument.

Example:

docker build --build-arg BORG_USER=myuser -t borgbackup-server .

Then use your custom image in docker-compose.yml:

services:
  borgbackup-server:
    image: borgbackup-server
    environment:
      - SSH_AUTHORIZED_KEYS=ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAI... user@host
    ports:
      - "2222:22"
    volumes:
      - ./data:/chroot/home