backup-client
A containerized SSH backup server built on Alpine Linux, designed to provide secure remote backup access using SSH/SFTP protocols.
Features
- 🔐 Secure SSH Access: Automated SSH server setup with configurable authentication
- 🐳 Docker Ready: Multi-architecture support (linux/amd64, linux/arm64)
- 📦 BorgBackup Integration: Built-in backup solution support
- ⚙️ Dynamic Configuration: Real-time SSH config monitoring and reloading
- 🔄 CI/CD Pipeline: Automated builds via Drone CI
Quick Start
docker run -p 20022:20022 -v /backup/data:/home/backup safebox/backup-client
Configuration
Environment Variables
| Variable | Default | Description |
|---|---|---|
| SSH_PORT | 20022 | SSH server listening port |
| SSH_USER | backup | Backup user name |
| SSH_PASSWORD | backup | User password for authentication |
How it Works
The container automatically:
User Setup: Creates the backup user with configured credentials SSH Configuration: Generates host keys (Ed25519) if not present Server Start: Launches SSH daemon
Key Components
Dockerfile: Alpine-based image with OpenSSH, su-exec, and BorgBackup start_backup.sh: Main entrypoint script handling SSH setup .drone.yml: CI/CD pipeline for multi-architecture builds
Security Features Host Key Persistence: SSH host keys are generated once and persisted Configurable Authentication: Supports both password and public key authentication User Isolation: Runs SSH daemon as non-root user
Development
Development builds: Push to registry.dev.format.hu/backup-client Release builds: Tag events push to safebox/backup-client on DockerHub Multi-architecture: Supports both AMD64 and ARM64 platforms
License
This project is open source. Please check the license file for details.