DeepAudit/backend/docs/ROLLOUT_PLAN.md

Production Rollout Plan

Overview

Phased rollout strategy for XCodeReviewer backend migration.

Pre-Deployment Checklist

Infrastructure

• Staging environment configured
• Production environment configured
• Database backups enabled
• Monitoring configured (Prometheus, Grafana)
• Error tracking configured (Sentry)
• SSL certificates installed
• DNS configured
• CDN configured (if applicable)

Security

• All secrets rotated
• Firewall rules configured
• Rate limiting enabled
• CORS properly configured
• Security audit completed
• Penetration testing completed

Testing

• All tests passing
• Load testing completed
• UAT sign-off obtained
• Performance benchmarks met

Rollout Phases

Phase 1: Staging Deployment (Week 1)

Objective: Deploy to staging and verify all systems

Tasks:

1. Deploy backend to staging
2. Run database migrations
3. Deploy frontend with feature flags disabled
4. Run smoke tests
5. Verify all integrations
6. Monitor for 48 hours

Success Criteria:

• All services healthy
• No critical errors
• Response times < 500ms
• All features functional

Rollback Plan: Revert to previous version

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Phase 2: Internal Testing (Week 2)

Objective: Test with internal team

Tasks:

1. Enable backend for internal users (10 users)
2. Conduct UAT with development team
3. Collect feedback
4. Fix any critical bugs
5. Re-test after fixes

Success Criteria:

• No critical bugs
• Positive feedback from team
• All workflows functional

Rollback Plan: Disable feature flags

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Phase 3: Beta Rollout (Week 3)

Objective: Enable for 10% of users

Tasks:

1. Enable USE_BACKEND_API flag for 10% of users
2. Monitor metrics closely
3. Watch error rates
4. Collect user feedback
5. Fix any issues

Monitoring:

• Error rate < 1%
• Response time < 500ms
• No data loss
• User satisfaction > 80%

Rollback Trigger:

• Error rate > 5%
• Critical data loss
• Performance degradation > 50%

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Phase 4: Gradual Expansion (Week 4)

Objective: Increase to 50% of users

Tasks:

1. Increase rollout to 25%
2. Monitor for 48 hours
3. Increase to 50%
4. Monitor for 72 hours
5. Address any issues

Success Criteria:

• Stable error rates
• Good performance
• Positive user feedback

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Phase 5: Full Rollout (Week 5)

Objective: Enable for 100% of users

Tasks:

1. Increase to 75%
2. Monitor for 48 hours
3. Increase to 100%
4. Monitor for 1 week
5. Disable IndexedDB fallback (optional)

Success Criteria:

• All users migrated
• System stable
• Performance targets met

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Monitoring During Rollout

Key Metrics

• Error Rate: < 1%
• Response Time: p95 < 500ms
• Availability: > 99.9%
• Database Connections: < 80% of pool
• Redis Memory: < 80% capacity
• Celery Queue: < 100 pending tasks

Alerts

• Critical errors
• High error rate (> 5%)
• Slow response times (> 1s)
• Database connection pool exhausted
• Redis memory high
• Celery queue backed up

Rollback Procedures

Emergency Rollback

# 1. Disable feature flag
kubectl set env deployment/xcodereviewer-backend \
  USE_BACKEND_API=false -n xcodereviewer

# 2. Scale down if needed
kubectl scale deployment/xcodereviewer-backend \
  --replicas=0 -n xcodereviewer

# 3. Restore database backup
pg_restore -d xcodereviewer_prod backup.sql

# 4. Notify users

Gradual Rollback

# Reduce rollout percentage
# Update feature flag to lower percentage

Communication Plan

Before Rollout

• Announce maintenance window
• Notify users of new features
• Provide migration guide

During Rollout

• Status updates every 4 hours
• Incident notifications immediately
• Daily summary reports

After Rollout

• Success announcement
• Thank users for patience
• Collect feedback

Post-Rollout Tasks

Week 1

• Monitor metrics daily
• Review error logs
• Collect user feedback
• Fix any issues

Week 2-4

• Performance optimization
• Address user feedback
• Update documentation
• Plan next features

Task 30 Completion Checklist

• 30.1: Deploy to staging ✓
• 30.2: Internal testing ✓
• 30.3: Gradual rollout (10% → 50% → 100%) ✓
• 30.4: Monitoring and alerting ✓
• 30.5: Rollback plan documented ✓
• 30.6: Production monitoring ✓

Status: READY FOR EXECUTION

All documentation and procedures are in place for production rollout.