---
tags: [tech-patterns, auto-generated]
source: ppt-tool
created: 2026-05-12
---

# Docker Compose Auto-Restart with Systemd Service

## When to use
When a Docker Compose application (like a multi-container stack) needs to automatically restart after server reboot, preventing 503 errors from stopped containers while reverse-proxy (Apache, nginx) remains running.

## Prerequisites
- Docker and Docker Compose installed on the server
- Docker Compose application defined in `docker-compose.yml`
- Systemd available (Linux with systemd init system)
- Application accessible via reverse proxy (Apache/nginx) on specific ports (e.g., 8001 for API, 3000 for web)

## Steps
1. Create a systemd service file at `/etc/systemd/system/docker-compose-ppt-tool.service`:
   ```ini
   [Unit]
   Description=ppt-tool Docker Compose Service
   Requires=docker.service
   After=docker.service

   [Service]
   Type=oneshot
   WorkingDirectory=/path/to/ppt-tool
   ExecStart=/usr/bin/docker compose up -d
   ExecStop=/usr/bin/docker compose down
   RemainAfterExit=yes
   Restart=on-failure

   [Install]
   WantedBy=multi-user.target
   ```

2. Replace `/path/to/ppt-tool` with the actual directory containing `docker-compose.yml`

3. Reload systemd daemon:
   ```bash
   sudo systemctl daemon-reload
   ```

4. Enable the service for auto-start:
   ```bash
   sudo systemctl enable docker-compose-ppt-tool.service
   ```

5. Start the service:
   ```bash
   sudo systemctl start docker-compose-ppt-tool.service
   ```

6. Verify containers are running:
   ```bash
   docker compose ps
   ```

## Key Configuration
- **WorkingDirectory**: Must point to directory containing `docker-compose.yml`
- **Type=oneshot**: Allows `RemainAfterExit=yes` to keep service marked as "started" even though process exits
- **Requires=docker.service / After=docker.service**: Ensures Docker daemon starts before this service
- **ExecStart/ExecStop**: Use full paths to docker-compose (`/usr/bin/docker compose`, not relative `docker compose`)

## Gotchas
- **Server reboot stops containers but not Apache**: Reverse proxy continues running, attempting to reach dead backend services → 503 errors
- **Relative docker-compose commands fail in systemd**: Always use absolute path `/usr/bin/docker compose` in ExecStart/ExecStop
- **Verify docker.service exists**: Check `systemctl status docker.service` before enabling the service
- **Postgres volumes persist**: Data survives container restart; only application layer needs recovery
- **Port binding verification**: After restart, confirm reverse proxy can reach containers on expected ports (8001, 3000, etc.)

## Source
Project: ppt-tool