Summary

Create a production deployment guide covering how to deploy applications built with the kcenon ecosystem, including configuration, monitoring, troubleshooting, and operational best practices.

Parent Issue

Part of: [EPIC] docs: Address documentation gaps across all ecosystem systems (#325)

Background (Why)

While individual system documentation covers development usage, there is no guide for deploying kcenon-based applications to production. Developers transitioning from development to production need guidance on:

• Production-appropriate configuration
• Monitoring and alerting setup
• Log management at scale
• Performance tuning for production workloads
• Troubleshooting common production issues

Scope (What)

Create docs/PRODUCTION_GUIDE.md covering:

1. Production Configuration

Thread System

• Thread pool sizing for production (cores × N formula)
• Autoscaler configuration for variable workloads
• Queue sizing and overflow policies

Logger System

• Log level strategy (ERROR/WARN in production)
• Rotation and retention configuration
• Structured logging format for log aggregation
• Async logging for performance

Database System

• Connection pool sizing
• Query timeout configuration
• Failover and retry configuration

Network System

• Connection limits and backlog sizing
• TLS configuration (cipher suites, cert rotation)
• Keep-alive and timeout tuning
• Rate limiting configuration

Monitoring System

• Metrics export interval
• Alert threshold configuration
• Dashboard setup

2. Deployment Patterns

3. Container Deployment

• Docker image best practices
• Docker Compose example
• Kubernetes deployment manifests
• Health check endpoint configuration

4. Monitoring and Alerting

• Key metrics to monitor per system
• Alert thresholds and escalation
• Dashboard templates (Grafana, etc.)
• Log aggregation setup (ELK, Loki)

5. Troubleshooting Guide

• High CPU: diagnosis and resolution
• Memory leaks: detection and mitigation
• Connection issues: debugging steps
• Performance degradation: investigation workflow

6. Security Hardening

• TLS everywhere configuration
• Log sanitization for PII
• Credential management
• Network isolation recommendations

7. Upgrade and Rollback

• Version compatibility matrix
• Rolling upgrade procedure
• Rollback procedure
• Configuration migration between versions

Acceptance Criteria

• Configuration guide for all systems in production mode
• At least 3 deployment patterns documented
• Container deployment examples (Docker, K8s)
• Monitoring and alerting setup guide
• Troubleshooting guide with common issues
• Security hardening checklist
• Upgrade/rollback procedures