Tutorials Cloud Computing Tutorial
Disaster Recovery — Complete Guide
Disaster Recovery — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of Cloud Computing Tutorial on Toolliyo Academy.
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Cloud Computing Tutorial · Lesson 75 of 100
Disaster Recovery
Foundations ✓ → Platform ✓ → Ops → Projects
Ops · 3 — DevOps, security, scale · ~10 min · Cloud — Scalability & Distributed Systems
What is this?
Disaster recovery restores operations after region-wide or major failures — backups, replication, and runbooks define RTO/RPO.
Why should you care?
CloudVerse banking must reopen APIs in a secondary region within agreed hours.
See it live — copy this example
Use AWS/Azure/GCP free tier or local Docker/Kind. Sketches and YAML are meant to be typed and adapted.
# DR runbook excerpt (CloudVerse)
primary_region: eastus
dr_region: westeurope
rpo: 15m
rto: 4h
steps:
- verify_secondary_sql_readable_replica
- promote_or_failover_db: cloudverse-core
- update_front_door_origin: westeurope-aks
- scale_dr_cluster: min_replicas=6
- notify_stakeholders: status.cloudverse.ioWhat happened?
- DR is a process: replicate data, practice failover, and keep config in Git.
- Cold standby costs less; warm DR fails faster.
Practice next
- Define RTO/RPO with business.
- Replicate DB to second region.
- Document failover steps.
- Automate DNS/Front Door switch.
- Measure actual RTO in drill.
Remember
RTO/RPO drive design. Practice failover. Same IaC in DR region.
CloudVerse region failover
Primary region network partition.
Outcome: Team executes runbook; EU region serves traffic in 3h.
Interview prep for this lesson
Practice these questions aloud after reading—each links to a full structured answer.
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