Phase 8: Documentation & Rollout

[sob]

Overview

Create comprehensive documentation and execute phased rollout of the DNS resolver system.

Parent Issue: #1093

Tasks

• Write architecture documentation
• Create operations runbook
• Document troubleshooting guide
• Create client configuration guides
• Document monitoring and alerts
• Plan rollout phases
• Create rollback procedures
• Update network diagrams
• Schedule maintenance window
• Communicate changes to users

Documentation Structure

Architecture Documentation

• System overview and components
• Data flow diagrams
• Security architecture
• Performance characteristics
• Dependency mapping

Operations Runbook

• Daily operations tasks
• Backup procedures
• Certificate renewal
• Cache management
• Scaling procedures

Troubleshooting Guide

• Common issues and solutions
• Log analysis
• Performance debugging
• Query tracing
• Emergency procedures

Client Configuration

• Standard DNS setup (OS-specific)
• DoH client configuration
• Browser settings
• Mobile device setup
• Application-specific DNS

Monitoring Guide

• Dashboard overview
• Alert meanings
• Metric interpretation
• SLO tracking
• Incident response

Rollout Plan

Phase 1: Internal Testing (Week 1)

• Deploy to test environment
• Internal team testing
• Performance validation
• Security audit

Phase 2: Limited Rollout (Week 2)

• 10% of traffic
• Monitor metrics closely
• Gather feedback
• Fix any issues

Phase 3: Full Rollout (Week 3)

• Migrate all traffic
• Update all documentation
• Communicate completion
• Monitor for 48 hours

Rollback Procedures

• DNS failover to previous resolver
• Service rollback via Flux
• Cache preservation
• Communication plan

Files to Create

docs/dns-resolver/
├── architecture.md
├── operations.md
├── troubleshooting.md
├── client-setup.md
├── monitoring.md
└── rollout-plan.md

Acceptance Criteria

• All documentation complete and reviewed
• Runbooks tested by operations team
• Client guides validated on all platforms
• Rollout plan approved by stakeholders
• Rollback tested successfully
• Team training completed
• Communication sent to users
• Post-rollout monitoring plan in place