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Oleksandr Bezdieniezhnykh
54 lines
2.0 KiB
Markdown
54 lines
2.0 KiB
Markdown
# Step 6: Deployment Procedures
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**Role**: DevOps / Platform engineer
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**Goal**: Define deployment strategy, rollback procedures, health checks, and deployment checklist.
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**Constraints**: Procedures document — no implementation.
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## Steps
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1. Define deployment strategy:
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- Preferred pattern: blue-green / rolling / canary (choose based on architecture)
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- Zero-downtime requirement for production
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- Graceful shutdown: 30-second grace period for in-flight requests
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- Database migration ordering: migrate before deploy, backward-compatible only
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2. Define health checks:
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| Check | Type | Endpoint | Interval | Threshold |
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|-------|------|----------|----------|-----------|
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| Liveness | HTTP GET | `/health/live` | 10s | 3 failures → restart |
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| Readiness | HTTP GET | `/health/ready` | 5s | 3 failures → remove from LB |
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| Startup | HTTP GET | `/health/ready` | 5s | 30 attempts max |
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3. Define rollback procedures:
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- Trigger criteria: health check failures, error rate spike, critical alert
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- Rollback steps: redeploy previous image tag, verify health, rollback database if needed
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- Communication: notify stakeholders during rollback
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- Post-mortem: required after every production rollback
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4. Define deployment checklist:
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- [ ] All tests pass in CI
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- [ ] Security scan clean (zero critical/high CVEs)
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- [ ] Database migrations reviewed and tested
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- [ ] Environment variables configured
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- [ ] Health check endpoints responding
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- [ ] Monitoring alerts configured
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- [ ] Rollback plan documented and tested
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- [ ] Stakeholders notified
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## Self-verification
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- [ ] Deployment strategy chosen and justified
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- [ ] Zero-downtime approach specified
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- [ ] Health checks defined (liveness, readiness, startup)
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- [ ] Rollback trigger criteria and steps documented
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- [ ] Deployment checklist complete
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## Save action
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Write `deployment_procedures.md` using `templates/deployment_procedures.md`.
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## Blocking
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**BLOCKING**: Present deployment procedures to user. Do NOT proceed until confirmed.
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