homelab-optimized/docs/services/individual/cron.md

Cron

🟡 Other Service

📋 Service Overview

Property	Value
Service Name	cron
Host	Calypso
Category	Other
Difficulty	🟡
Docker Image	alpine:latest
Compose File	Calypso/firefly/firefly.yaml
Directory	Calypso/firefly

🎯 Purpose

cron is a specialized service that provides specific functionality for the homelab infrastructure.

🚀 Quick Start

Prerequisites

• Docker and Docker Compose installed
• Basic understanding of REDACTED_APP_PASSWORD
• Access to the host system (Calypso)

Deployment

# Navigate to service directory
cd Calypso/firefly

# Start the service
docker-compose up -d

# Check service status
docker-compose ps

# View logs
docker-compose logs -f cron

🔧 Configuration

Docker Compose Configuration

command: sh -c "echo \"0 3 * * * wget -qO- http://firefly:8080/api/v1/cron/9610001d2871a8622ea5bf5e65fe25db\"
  | crontab - && crond -f -L /dev/stdout"
container_name: Firefly-Cron
cpu_shares: 256
depends_on:
  firefly:
    condition: service_started
environment:
  TZ: America/Los_Angeles
hostname: firefly-cron
image: alpine:latest
mem_limit: 64m
restart: on-failure:5
security_opt:
- no-new-privileges:true

Environment Variables

Variable	Value	Description
TZ	America/Los_Angeles	Timezone setting

Port Mappings

No ports exposed.

Volume Mappings

No volumes mounted.

🌐 Access Information

This service does not expose any web interfaces.

🔒 Security Considerations

• ✅ Security options configured
• ⚠️ Consider running as non-root user

📊 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:

docker stats

🔍 Health Monitoring

⚠️ No health check configured Consider adding a health check:

healthcheck:
  test: ["CMD", "curl", "-f", "http://localhost:PORT/health"]
  interval: 30s
  timeout: 10s
  retries: 3

Manual Health Checks

# 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

# Check service status
docker-compose ps

# View real-time logs
docker-compose logs -f cron

# Restart service
docker-compose restart cron

# Update service
docker-compose pull cron
docker-compose up -d cron

# Access service shell
docker-compose exec cron /bin/bash
# or
docker-compose exec cron /bin/sh

📚 Additional Resources

• Official Documentation: Check the official docs for cron
• Docker Hub: Official cron
• Community Forums: Search for community discussions and solutions
• GitHub Issues: Check the project's GitHub for known issues

🔗 Related Services

Other services in the other category on Calypso

---

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: Calypso/firefly/firefly.yaml