AWS DevOps Engineer Professional
942 incident response problems that help with AWS DevOps Engineer Professional prep.
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All problems (942)
CICD-1301Docker Compose watch shows successful sync events but nested route handlers never reloadA team adopts docker compose watch for faster local verification and later finds only some deep application routes refuse to reload.CI/CDIntermediate14 minProCICD-135A rollback job restores the config map but not the worker scale, and the system keeps over-consuming the old backendConfiguration returns to normal, yet runtime pressure stays high because capacity settings were treated as outside the rollback scope.CI/CDIntermediate15 minProCICD-146A self-hosted runner group is moved to a new subnet, but the internal package mirror allowlist still trusts only the previous CIDRThe jobs land correctly, yet dependency downloads fail because network identity changed while the workflow labels stayed the same.CI/CDIntermediate15 minProCICD-399A broken-glass deploy skips manual approval while cleanup automation still assumes the abandoned candidate release owns the shared sandbox during a staged decommissionThe emergency path works, but cleanup logic later tears down the wrong environment state. The service still works through the primary path, but one dependency only fails when the old component is finally drained away.CI/CDIntermediate16 minProCICD-131A change-approval webhook retries on timeout and opens duplicate maintenance windows for the same deploymentOne release becomes two approved windows because the idempotency key was not preserved across retries.CI/CDIntermediate16 minProCICD-159A release pipeline reuses the same artifact name across two environments, and the staging package overwrites the production-ready build in shared storageThe objects are all present, but one naming collision turns an environment boundary into a storage race.CI/CDIntermediate16 minProCICD-336A deployment lock is cleared manually, but downstream cleanup logic still assumes the old lock owner is active and deletes the wrong environment during a failover rehearsalThe lock seems gone, yet ownership metadata from the previous run still drives destructive automation. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.CI/CDIntermediate17 minProCICD-174A multi-architecture promotion pipeline validates only one platform manifest during a failover rehearsalThe tag exists and one worker pool succeeds, yet another architecture never receives the complete promoted artifact. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.CI/CDIntermediate17 minProCICD-143The deployment job waits for image replication, but only the amd64 manifest arrives before the timeout and mixed-arch clusters fail progressivelyThe release gate checks one success condition, yet the fleet needs a broader replication contract than the workflow currently verifies.CI/CDIntermediate17 minProCICD-515A broken-glass deploy skips manual approvalA broken-glass deploy skips manual approval focuses on ci-cd-release-safety and asks the reader to isolate 404 and Rewrite Mismatch. 실무에서는 ci-cd-release-safety 문제를 볼 때 실패 단계만 보지 말고 최근 변경, 이미지 태그, 시크릿 주입, 롤백 가능 여부를 먼저 함께 확인하는 편이 빠릅니다.CI/CDIntermediate18 minProCICD-517A broken-glass deploy skips manual approvalA broken-glass deploy skips manual approval focuses on ci-cd-release-safety and asks the reader to isolate 404 and Rewrite Mismatch. 실무에서는 ci-cd-release-safety 문제를 볼 때 실패 단계만 보지 말고 최근 변경, 이미지 태그, 시크릿 주입, 롤백 가능 여부를 먼저 함께 확인하는 편이 빠릅니다.CI/CDIntermediate18 minProCICD-519A broken-glass deploy skips manual approvalA broken-glass deploy skips manual approval focuses on ci-cd-release-safety and asks the reader to isolate 404 and Rewrite Mismatch. 실무에서는 ci-cd-release-safety 문제를 볼 때 실패 단계만 보지 말고 최근 변경, 이미지 태그, 시크릿 주입, 롤백 가능 여부를 먼저 함께 확인하는 편이 빠릅니다.CI/CDIntermediate18 minProCICD-699A broken-glass deploy skips manual approvalA broken-glass deploy skips manual approval focuses on ci-cd-release-safety and asks the reader to isolate 404 and Rewrite Mismatch. 실무에서는 ci-cd-release-safety 문제를 볼 때 실패 단계만 보지 말고 최근 변경, 이미지 태그, 시크릿 주입, 롤백 가능 여부를 먼저 함께 확인하는 편이 빠릅니다.CI/CDIntermediate21 minProCICD-035Self-hosted runner checkout fails after Docker step leaves root-owned workspaceA container-based build step finishes green, but the next checkout or cleanup fails because files written in the workspace are owned by root instead of the runner user.CI/CDIntermediate23 minProCICD-1630A Terraform plan is clean and apply still driftsApply still drifts after a provider mirror hostname change.CI/CDIntermediate10 minProCICD-1620An Argo CD sync is green and one deployment still loads the wrong imageOne Argo CD workload still loads the wrong image after digest pin cleanup.CI/CDIntermediate10 minProCICD-1710A blue-green swap completes and one webhook consumer still failsA webhook consumer still fails after a blue-green swap looks complete.CI/CDIntermediate11 minProCICD-1760A canary deploy is green and one consumer still breaksOne consumer still breaks after a green canary deploy.CI/CDIntermediate11 minProCICD-1720A canary promotion looks healthy and one consumer still failsOne consumer still fails after a canary promotion looks healthy.CI/CDIntermediate11 minProCICD-1690A canary release passes health checks and one tenant still failsA canary looks healthy globally, yet one tenant-specific background path still fails.CI/CDIntermediate11 minPro