🏛️ Enterprise Platform Architecture, SRE & Governance

Welcome to the Enterprise Architecture, SRE & Governance Masterclass. This module serves as the capstone architectural syllabus designed for Principal Platform Architects, Staff SREs, and Enterprise Cloud Leaders.

🧭 Masterclass Executive Curriculum

flowchart TD
    subgraph Pillar1 ["Pillar 1: Fleet Operations & Delivery"]
        L1["Lesson 1: Enterprise Patching & Deployment Strategies<br/>• Livepatch vs AMI Refresh<br/>• Canary, Blue/Green, Shadow, A/B<br/>• Expand/Contract DB Schema Migrations"]
    end

    subgraph Pillar2 ["Pillar 2: Resilience & High Availability"]
        L2["Lesson 2: Enterprise HA & DR Architectures<br/>• Multi-AZ Quorum & Split-Brain<br/>• 4 DR Tiers: RTO/RPO Math<br/>• Route 53 ARC & Aurora Global DB"]
    end

    subgraph Pillar3 ["Pillar 3: Production Workload Engineering"]
        L3["Lesson 3: Production 3-Tier K8s Reference Stack<br/>• Full E2E Production Manifests<br/>• SecurityContext, PDB, HPA v2, TopologySpread<br/>• Cilium NetworkPolicy & ExternalSecrets"]
    end

    subgraph Pillar4 ["Pillar 4: Edge Delivery & Telemetry Ingestion"]
        L4["Lesson 4: CloudFront Edge Delivery & Log Management<br/>• Origin Shield, OAC, CF Functions vs Lambda@Edge<br/>• Vector DaemonSets & Multiline Regex Parsing<br/>• Edge PII Redaction & S3 WORM Compliance"]
    end

    subgraph Pillar5 ["Pillar 5: Observability & SRE Standards"]
        L5["Lesson 5: RUM Specs, Telemetry & SRE Standards<br/>• Core Web Vitals & W3C traceparent Correlation<br/>• RED, USE, 4 Golden Signals & OTel Collectors<br/>• Google SRE Multi-Window Multi-Burn-Rate Alerts"]
    end

    subgraph Pillar6 ["Pillar 6: Zero-Trust & Executive Governance"]
        L6["Lesson 6: Securing Scalable Systems, KPIs, KRIs & Auditing<br/>• 5-Layer Defense-in-Depth Zero-Trust<br/>• DORA KPIs & Vulnerability Aging KRIs<br/>• CSPM, SOC 2 / FedRAMP & Immutable WORM Audit"]
    end

    subgraph Pillar7 ["Pillar 7: Massive Multi-Account Scale & Response"]
        L7["Lesson 7: AWS Landing Zones at Scale (700+ Apps)<br/>• Downward Entities OU Hierarchy & IPAM<br/>• 3-Tier Guardrails (Preventative, Detective, Corrective)<br/>• JIT Break-Glass & Automated Incident Quarantine"]
    end

    subgraph Pillar8 ["Pillar 8: State Management & Cyclic Lifecycle"]
        L8["Lesson 8: Database Seeding & Cyclic Dependencies<br/>• The 'Seed on Boot' Multi-Pod Deadlock<br/>• ArgoCD PreSync Waves & Batch Migrators<br/>• Transactional Advisory Locks & Event Hydration"]
    end

    subgraph Pillar9 ["Pillar 9: FinOps & Cloud Cost Engineering"]
        L9["Lesson 9: FinOps Architect & Cost Engineering<br/>• Inform, Optimize, Operate Lifecycle<br/>• Kubecost / OpenCost Allocation & Karpenter Consolidation<br/>• Shift-Left Infracost CI/CD & Unit Economics"]
    end

    subgraph Pillar10 ["Pillar 10: Brownfield Cloud Migrations"]
        L10["Lesson 10: Brownfield Migration Architecture<br/>• 6 Rs Decision Matrix (Rehost, Replatform, Refactor)<br/>• AWS DMS & SCT with Zero-Downtime CDC<br/>• Hybrid Direct Connect BGP Failover & Dual-Run Cutovers"]
    end

    subgraph Pillar11 ["Pillar 11: High-Concurrency & Capacity Sizing"]
        L11["Lesson 11: High-Concurrency Sizing Math (IPL Scale)<br/>• Little's Law Concurrency & Tail Latency Math<br/>• HikariCP Equation & RDS Proxy Multiplexing<br/>• XFetch Probabilistic Cache Stampede Prevention"]
    end

    subgraph Pillar12 ["Pillar 12: War Room Incident Defense & RCAs"]
        L12["Lesson 12: 3:00 AM Production Outage War Room<br/>• 6-Stage Incident Command Protocol<br/>• 3 Battle-Tested War Stories with Exact Metrics<br/>• Blameless Postmortems (PIR) & ARB Defense"]
    end

    Pillar1 --> Pillar2
    Pillar2 --> Pillar3
    Pillar3 --> Pillar4
    Pillar4 --> Pillar5
    Pillar5 --> Pillar6
    Pillar6 --> Pillar7
    Pillar7 --> Pillar8
    Pillar8 --> Pillar9
    Pillar9 --> Pillar10
    Pillar10 --> Pillar11
    Pillar11 --> Pillar12

🎯 Architectural Knowledge Matrix