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2026-04-18 22:03:55 +03:00

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Step 6: Deployment Procedures

Role: DevOps / Platform engineer Goal: Define deployment strategy, rollback procedures, health checks, and deployment checklist. Constraints: Procedures document — no implementation.

Steps

  1. Define deployment strategy:

    • Preferred pattern: blue-green / rolling / canary (choose based on architecture)
    • Zero-downtime requirement for production
    • Graceful shutdown: 30-second grace period for in-flight requests
    • Database migration ordering: migrate before deploy, backward-compatible only
  2. Define health checks:

Check Type Endpoint Interval Threshold
Liveness HTTP GET /health/live 10s 3 failures → restart
Readiness HTTP GET /health/ready 5s 3 failures → remove from LB
Startup HTTP GET /health/ready 5s 30 attempts max
  1. Define rollback procedures:

    • Trigger criteria: health check failures, error rate spike, critical alert
    • Rollback steps: redeploy previous image tag, verify health, rollback database if needed
    • Communication: notify stakeholders during rollback
    • Post-mortem: required after every production rollback
  2. Define deployment checklist:

    • All tests pass in CI
    • Security scan clean (zero critical/high CVEs)
    • Database migrations reviewed and tested
    • Environment variables configured
    • Health check endpoints responding
    • Monitoring alerts configured
    • Rollback plan documented and tested
    • Stakeholders notified

Self-verification

  • Deployment strategy chosen and justified
  • Zero-downtime approach specified
  • Health checks defined (liveness, readiness, startup)
  • Rollback trigger criteria and steps documented
  • Deployment checklist complete

Save action

Write deployment_procedures.md using templates/deployment_procedures.md.

Blocking

BLOCKING: Present deployment procedures to user. Do NOT proceed until confirmed.