DuplicAid

DuplicAid is a CLI tool for managing PostgreSQL backups using SQL dumps. It provides a unified interface for creating, listing, and restoring backups from PostgreSQL instances running in Docker containers.

The tool supports both local and remote execution modes.

⚠️ The package depends on tiredofit/docker-db-backup:4.1.21 for backup operations.

Features

• SQL Dumps: Create and restore database backups using pg_dump/pg_restore
• S3 Integration: Store and retrieve backups from S3-compatible storage
• Dual Execution Modes: Manage backups locally or on remote servers via SSH

Installation

Install duplicaid using uv:

# Install from PyPI
uv add duplicaid

# Or install from source
git clone <repository-url>
cd duplicaid
uv sync --extra dev

Configuration

Duplicaid stores configuration in .duplicaid.yml in your current working directory by default. You can specify a different location using the --config flag.

Execution Modes

Remote Mode (default):

• Manages PostgreSQL containers on a remote server via SSH
• Requires SSH key authentication
• All Docker commands executed on remote server

Local Mode:

• Manages PostgreSQL containers on the local machine
• No SSH connection required
• Docker commands executed locally

Setup

Initialize configuration interactively:

duplicaid config init

Configuration Options

• Execution Mode: remote or local
• Remote Server (remote mode only): SSH connection details (host, user, port, key path)
• Container Names: PostgreSQL and backup container names
• PostgreSQL Credentials: Database user and password
• Paths: Docker Compose file location

Example Configurations

Remote Mode:

execution_mode: remote
remote:
  host: your-server.example.com
  user: root
  port: 22
  ssh_key_path: /home/user/.ssh/id_rsa
containers:
  postgres: postgres
  backup: db-backup
postgres:
  user: postgres
  password: your_secure_password
  host: postgres
s3:
  endpoint: https://s3.amazonaws.com
  bucket: my-backups
  path: postgres/backups
  # access_key and secret_key can be set here or via env vars:
  # AWS_ACCESS_KEY_ID / S3_ACCESS_KEY
  # AWS_SECRET_ACCESS_KEY / S3_SECRET_KEY
paths:
  docker_compose: /home/user/postgres/docker-compose.yml
databases:
  - myapp
  - analytics

Local Mode:

execution_mode: local
containers:
  postgres: postgres
  backup: db-backup
postgres:
  user: postgres
  password: your_secure_password
  host: postgres
s3:
  endpoint: http://localhost:9000
  bucket: my-backups
  path: postgres/backups
paths:
  docker_compose: /home/user/postgres/docker-compose.yml

S3 Credentials:

S3 credentials can be configured in two ways:

1. In config file (less secure):

   s3:
     access_key: YOUR_ACCESS_KEY
     secret_key: YOUR_SECRET_KEY
   

2. Via environment variables (recommended):

   export AWS_ACCESS_KEY_ID=YOUR_ACCESS_KEY
   export AWS_SECRET_ACCESS_KEY=YOUR_SECRET_KEY
   # or
   export S3_ACCESS_KEY=YOUR_ACCESS_KEY
   export S3_SECRET_KEY=YOUR_SECRET_KEY
   

Quick Start

1. Initialize Configuration:

   duplicaid config init
   

2. Check Status:

   duplicaid status
   

3. Create a Backup:

   duplicaid backup create
   

4. List Backups:

   duplicaid list backups
   

5. Restore a Backup:

   duplicaid restore mydb backup_file.sql.bz2
   

Backup Operations

Creating Backups

• Storage: S3-compatible storage (compressed with bzip2)
• Scope: All configured databases backed up automatically
• Format: pgsql_hostname_database_YYYYMMDD-HHMMSS.sql.bz2

Listing Backups

Backups can be listed from:

• S3-compatible storage (if configured)
• Local backup directory (fallback)

Restoring Backups

• Source: Automatically downloads from S3 if not found locally
• Scope: Database-specific restoration
• Compatibility: Works across PostgreSQL versions

Requirements

Common Requirements

• Python 3.12+
• Docker and Docker Compose
• PostgreSQL container
• tiredofit/db-backup container for backup operations

Remote Mode Additional Requirements

• SSH access to remote server
• SSH key authentication configured

Local Mode Additional Requirements

• Docker daemon running locally
• Access to local Docker socket

Development

Setup

1. Clone and setup:

   git clone <repository-url>
   cd duplicaid
   uv sync --extra dev
   

2. Install pre-commit hooks:

   uv run pre-commit install
   

3. Run tests:

   uv run pytest
   

Project Structure

duplicaid/
├── pyproject.toml          # Project configuration and dependencies
├── README.md               # This file
├── src/
│   └── duplicaid/          # Main package
│       ├── __init__.py
│       ├── cli.py          # CLI interface
│       ├── config.py       # Configuration management
│       ├── backup.py       # Backup operations
│       ├── ssh.py          # SSH connectivity
│       ├── executor.py     # Command execution
│       ├── discovery.py    # Database discovery
│       └── local.py        # Local operations
└── tests/                  # Test suite
    ├── conftest.py
    ├── test_cli.py
    ├── test_config.py
    ├── test_integration.py
    └── test_local_executor.py

Testing

The test suite includes:

• Unit tests: Test individual components
• Integration tests: Test component interactions
• CLI tests: Test command-line interface

Run specific test types:

# All tests
uv run pytest

# Unit tests only
uv run pytest -k "not integration"

# Integration tests only
uv run pytest -m integration

# With coverage
uv run pytest --cov=duplicaid

Development Workflow

This project uses automated releases with semantic commits.

Quick Start

# 1. Create feature branch
git checkout -b feat/new-feature

# 2. Push and create PR
git push origin feat/new-feature

# 3. Merge PR → Auto-release to PyPI

Semantic Commits

git commit -m "fix: resolve timeout"      # → patch release
git commit -m "feat: add encryption"      # → minor release
git commit -m "feat!: redesign API"       # → major release

Automation

• PRs: Auto-test, lint, format
• Main branch: Auto-version, auto-publish to PyPI
• Pre-commit: Enforce quality and commit format

Building and Publishing

# Manual build (for testing)
uv build

# Automated publishing (via GitHub Actions)
# → Happens automatically on main branch pushes
# → No manual PyPI uploads needed

# Emergency manual publish (not recommended)
uv publish