🏗️ Infrastructure Overview

• 4 nodes with reserved internal IPs
• Ubuntu 24 Desktop Edition on all nodes
• Docker Engine 28.3.2 in standalone mode
• Portainer CE 2.27.9 LTS for management
• Secure HTTPS communication between nodes
• Local network isolation for privacy

🖥️ Hardware Fleet

The cluster consists of 4 nodes with varied capabilities:

🚀 GitHub Actions

Self-hosted runners for CI/CD workflows:

• Organization-level runners
• Ephemeral containers for security
• Docker-in-Docker support
• 1 runner on nodes 1-3, 4 runners on node 4
• Custom labels for targeted workflows
• Token via environment variable (no secrets)

🐳 Container Platform

• Docker Engine 28.3.2 on all nodes
• Standalone mode (no Swarm orchestration)
• Docker Hub authenticated registry access
• Compose-based stack deployments via Portainer
• Persistent volumes for stateful workloads

🎛️ Management Platform

Portainer CE 2.27.9 LTS provides centralized control:

• Web UI on port 9443 (HTTPS)
• Agent-based node communication
• Compose stack deployment (standalone mode)
• Container logs and monitoring
• Registry authentication management

⚡ Performance

Benchmarked capabilities across the fleet:

• Nodes 1-3: ~11,200 events/sec (Intel N100)
• Node 4: ~55,600 events/sec (Intel i9-12900K)
• Combined: 7 concurrent CI/CD runners
• Total: 36 CPU cores and 107GB RAM

🔄 Recent Changes

Infrastructure updates as of July 2025:

• Swarm mode removed from all nodes
• Migrated to standalone Docker deployment
• Runners now use Compose-style stacks
• PAT tokens via environment variables
• Removed Docker secrets in favor of direct config

🔮 Future Roadmap

• Observability stack (Prometheus, Grafana)
• Automated backup strategies
• Service mesh for inter-container communication
• Self-hosted services expansion
• Enhanced monitoring and alerting