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documents/casestudies/chaosmonkey.md

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+# 🛡️ Case Study: Bulletproofing Genesis Infrastructure with ChaosMonkey DR Drills
+
+**Date:** May 10, 2025  
+**Organization:** Genesis Hosting Technologies  
+**Lead Engineer:** Doc (Genesis Radio, Infrastructure Director)  
+
+---
+
+## 🎯 Objective
+
+Design and validate a robust, automated disaster recovery (DR) system for Genesis infrastructure — including PostgreSQL, MinIO object storage, and ZFS-backed media — with an external testbed (Linode-hosted) named **ChaosMonkey**.
+
+---
+
+## 🧩 Infrastructure Overview
+
+| Component        | Role                                 | Location                    |
+|------------------|--------------------------------------|-----------------------------|
+| PostgreSQL       | Primary/replica database nodes       | zcluster.technodrome1/2     |
+| MinIO            | S3-compatible object storage         | shredder                    |
+| ZFS              | Primary media storage backend        | minioraid5, thevault        |
+| GenesisSync      | Hybrid mirroring and integrity check | Deployed to all asset nodes |
+| ChaosMonkey      | DR simulation and restore target     | Linode                      |
+
+---
+
+## 🧰 Tools Developed
+
+### `genesis_sync.sh`
+- Mirrors local ZFS to MinIO and vice versa
+- Supports verification, dry-run, and audit mode
+- Alerts via KrangBot on error or drift
+
+### `run_dr_failover.sh` & `run_dr_failback.sh`
+- Safely fail over and restore PostgreSQL + GenesisSync
+- Auto-promotes DB nodes
+- Sends alerts via Telegram
+
+### `genesis_clone_manager_multihost.sh`
+- Clones live systems (DB, ZFS, MinIO) from prod to ChaosMonkey
+- Runs with dry-run preview mode
+- Multi-host orchestration via SSH
+
+### `genesis_clone_validator.sh`
+- Runs on ChaosMonkey
+- Verifies PostgreSQL snapshot, ZFS datasets, and MinIO content
+- Can optionally trigger a GenesisSync `--verify`
+
+---
+
+## 🧪 DR Drill Process (Stage 3 - Controlled Live Test)
+
+1. 🔒 Freeze writes on production nodes
+2. 📤 Snapshot and clone entire stack to ChaosMonkey
+3. 🔁 Promote standby PostgreSQL and redirect test traffic
+4. 🧪 Validate application behavior and data consistency
+5. 📩 Alert via KrangBot with sync/report logs
+6. ✅ Trigger safe failback using snapshot + delta sync
+
+---
+
+## 🚨 Results
+
+- **Recovery time (RTO)**: PostgreSQL in 3 min, full app < 10 min
+- **Zero data loss** using basebackups and WAL
+- **GenesisSync** completed with verified parity between ZFS and MinIO
+- **Repeatable**: Same scripts reused weekly for validation
+
+---
+
+## 💡 Key Takeaways
+
+- **Scripts are smarter than sleepy admins** — guardrails matter
+- **ZFS + WAL + GitOps-style orchestration = rock solid DR**
+- **Testing DR live on ChaosMonkey builds real confidence**
+- **Failure Friday is not a risk — it’s a training ground**
+
+---
+
+## 🌟 Final Thoughts
+
+By taking DR out of theory and into action, Genesis Hosting Technologies ensures that not only is data safe — it’s recoverable, testable, and fully verified on demand. With ChaosMonkey in the mix, Genesis now embraces disaster… on its own terms.