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## Test Objectives
- Validate backup restoration procedures
- Verify failover mechanisms
- Test DNS failover
- Validate data integrity post-recovery
- Measure RTO and RPO
- Train incident response team

## Pre-Test Checklist
- [ ] Notify stakeholders
- [ ] Schedule 4-6 hour window
- [ ] Disable alerting to prevent noise
- [ ] Backup production data
- [ ] Ensure DR environment is isolated
- [ ] Have rollback plan ready

## Test Scope
- Primary database failover to standby
- Application failover to DR site
- DNS resolution update
- Load balancer health checks
- Data synchronization verification

## Success Criteria
- RTO: < 1 hour
- RPO: < 15 minutes
- Zero data loss
- All services operational
- Alerts functional

## Post-Test Activities
- Document timeline
- Identify gaps
- Update procedures
- Schedule post-mortem
- Update team documentation

          echo "Starting DR Test: $TEST_ID"

          # Step 1: Create test namespace
          echo "Creating isolated test environment..."
          kubectl create namespace "$DR_NAMESPACE" --dry-run=client -o yaml | kubectl apply -f -

          # Step 2: Restore database from backup
          echo "Restoring database from latest backup..."
          LATEST_BACKUP=$(aws s3 ls "$BACKUP_BUCKET/databases/" | \
            sort | tail -n 1 | awk '{print $4}')

          aws s3 cp "$BACKUP_BUCKET/databases/$LATEST_BACKUP" - | \
            gunzip | psql postgres://user:pass@dr-db:5432/testdb

          # Step 3: Deploy application to DR namespace
          echo "Deploying application to DR environment..."
          kubectl set image deployment/myapp \
            myapp=myrepo/myapp:production \
            -n "$DR_NAMESPACE"

          # Step 4: Run health checks
          echo "Running health checks..."
          for i in {1..30}; do
            if curl -sf http://myapp-dr/health > /dev/null; then
              echo "Health check passed"
              break
            fi
            echo "Waiting for service to be healthy... ($i/30)"
            sleep 10
          done

          # Step 5: Run smoke tests
          echo "Running smoke tests..."
          kubectl exec -it deployment/myapp -n "$DR_NAMESPACE" -- \
            npm run test:smoke || exit 1

          # Step 6: Validate data integrity
          echo "Validating data integrity..."
          PROD_RECORD_COUNT=$(psql postgres://user:pass@prod-db:5432/mydb \
            -t -c "SELECT COUNT(*) FROM users;")
          DR_RECORD_COUNT=$(psql postgres://user:pass@dr-db:5432/testdb \
            -t -c "SELECT COUNT(*) FROM users;")

          if [ "$PROD_RECORD_COUNT" -eq "$DR_RECORD_COUNT" ]; then
            echo "Data integrity verified"
          else
            echo "Data integrity check failed"
            exit 1
          fi

          # Step 7: Record metrics
          echo "Recording DR test metrics..."
          kubectl logs deployment/myapp -n "$DR_NAMESPACE" | \
            grep "startup_time" | jq '.' > /tmp/dr-metrics-$TEST_ID.json

          echo "DR Test Complete: $TEST_ID"

      restartPolicy: Never

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