# Mattermost Db

**🟡 Communication Service**

## 📋 Service Overview

| Property | Value |
|----------|-------|
| **Service Name** | mattermost-db |
| **Host** | homelab_vm |
| **Category** | Communication |
| **Difficulty** | 🟡 |
| **Docker Image** | `postgres:17` |
| **Compose File** | `homelab_vm/mattermost.yml` |
| **Directory** | `homelab_vm` |

## 🎯 Purpose

Mattermost is an open-source, self-hostable online chat service with file sharing, search, and integrations.

## 🚀 Quick Start

### Prerequisites
- Docker and Docker Compose installed
- Basic understanding of REDACTED_APP_PASSWORD
- Access to the host system (homelab_vm)

### Deployment
```bash
# Navigate to service directory
cd homelab_vm

# Start the service
docker-compose up -d

# Check service status
docker-compose ps

# View logs
docker-compose logs -f mattermost-db
```

## 🔧 Configuration

### Docker Compose Configuration
```yaml
container_name: mattermost-db
environment:
  POSTGRES_DB: mattermost
  POSTGRES_PASSWORD: "REDACTED_PASSWORD"
  POSTGRES_USER: mattermostuser
  TZ: America/Los_Angeles
healthcheck:
  interval: 10s
  retries: 10
  test:
  - CMD
  - pg_isready
  - -q
  - -d
  - mattermost
  - -U
  - mattermostuser
  timeout: 5s
hostname: mattermost-db
image: postgres:17
restart: unless-stopped
security_opt:
- no-new-privileges:true
user: 0:0
volumes:
- /srv/mattermost/db:/var/lib/postgresql/data:rw

```

### Environment Variables
| Variable | Value | Description |
|----------|-------|-------------|
| `POSTGRES_DB` | `mattermost` | Configuration variable |
| `POSTGRES_USER` | `mattermostuser` | Configuration variable |
| `POSTGRES_PASSWORD` | `***MASKED***` | PostgreSQL password |
| `TZ` | `America/Los_Angeles` | Timezone setting |


### Port Mappings
No ports exposed.

### Volume Mappings
| Host Path | Container Path | Type | Purpose |
|-----------|----------------|------|----------|
| `/srv/mattermost/db` | `/var/lib/postgresql/data` | bind | Application data |


## 🌐 Access Information

This service does not expose any web interfaces.

## 🔒 Security Considerations

- ✅ Security options configured
- ✅ Non-root user configured

## 📊 Resource Requirements

No resource limits configured

### Recommended Resources
- **Minimum RAM**: 512MB
- **Recommended RAM**: 1GB+
- **CPU**: 1 core minimum
- **Storage**: Varies by usage

### Resource Monitoring
Monitor resource usage with:
```bash
docker stats
```

## 🔍 Health Monitoring

✅ Health check configured
**Test Command**: `CMD pg_isready -q -d mattermost -U mattermostuser`
**Check Interval**: 10s
**Timeout**: 5s
**Retries**: 10

### Manual Health Checks
```bash
# Check container health
docker inspect --format='{{.State.Health.Status}}' CONTAINER_NAME

# View health check logs
docker inspect --format='{{range .State.Health.Log}}{{.Output}}{{end}}' CONTAINER_NAME
```

## 🚨 Troubleshooting

### Common Issues
**Service won't start**
- Check Docker logs: `docker-compose logs service-name`
- Verify port availability: `netstat -tulpn | grep PORT`
- Check file permissions on mounted volumes

**Can't access web interface**
- Verify service is running: `docker-compose ps`
- Check firewall settings
- Confirm correct port mapping

**Performance issues**
- Monitor resource usage: `docker stats`
- Check available disk space: `df -h`
- Review service logs for errors

### Useful Commands
```bash
# Check service status
docker-compose ps

# View real-time logs
docker-compose logs -f mattermost-db

# Restart service
docker-compose restart mattermost-db

# Update service
docker-compose pull mattermost-db
docker-compose up -d mattermost-db

# Access service shell
docker-compose exec mattermost-db /bin/bash
# or
docker-compose exec mattermost-db /bin/sh
```

## 📚 Additional Resources

- **Official Documentation**: Check the official docs for mattermost-db
- **Docker Hub**: [Official mattermost-db](https://hub.docker.com/_/postgres:17)
- **Community Forums**: Search for community discussions and solutions
- **GitHub Issues**: Check the project's GitHub for known issues

## 🔗 Related Services

Other services in the communication category on homelab_vm

---

*This documentation is auto-generated from the Docker Compose configuration. For the most up-to-date information, refer to the official documentation and the actual compose file.*

**Last Updated**: 2025-11-17  
**Configuration Source**: `homelab_vm/mattermost.yml`
