Lab 13 • CI/CD & DevOps Engineering
DevOps Pipeline Diagnosis & Rollback Decision Room
Locate the root cause of a broken GitHub Actions build. Re-order pre-deploy database migration steps and verify green stage gates.
Pipeline Execution Stages
1. Lint & Static Analysispassed
ESLint passed: 0 warnings, 0 errors
2. Unit Test Suitepassed
Jest: 142 tests passed in 14.2s
3. DB Migration & Integrationfailed
ERROR: FATAL: relation "users_v2" does not exist at /db/migrate.sql:42. Missing pre-deploy migration stage!
4. Canary 10% Rolloutpending
Awaiting upstream stages.
Live Build Terminal Logs
[1. Lint & Static Analysis]
ESLint passed: 0 warnings, 0 errors
[2. Unit Test Suite]
Jest: 142 tests passed in 14.2s
[3. DB Migration & Integration]
ERROR: FATAL: relation "users_v2" does not exist at /db/migrate.sql:42. Missing pre-deploy migration stage!
[4. Canary 10% Rollout]
Awaiting upstream stages.