AWS DevOps Engineer Professional
942 incident response problems that help with AWS DevOps Engineer Professional prep.
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All problems (942)
CICD-1321A Compose stack stays unhealthy after a fixed probeAn operator fixes a bad health check command in compose and later wonders why the container still reports the old failure pattern.CI/CDIntermediate13 minProCICD-1302A container stays unhealthy forever after a bad migrationA deployment looks protected by health checks until one release wedges a service in an unhealthy-but-still-running state.CI/CDIntermediate13 minProCICD-1351A Docker Compose rollout recreates one service and the dependency never recoversA team cleans up service names in compose and later one app starts timing out on internal dependencies despite all containers reporting healthy.CI/CDIntermediate13 minProCICD-1333A GitHub Actions cache restores successfully and one test shard still...A GitHub Actions cache restores successfully and one test shard still... focuses on Runner Hygiene and asks the reader to isolate the key signal in GitHub. A successful cache restore log does not prove the event can save the next cache state.CI/CDIntermediate13 minProCICD-1357A GitHub Actions monorepo workflow skips the changed serviceA GitHub Actions monorepo workflow skips the changed service focuses on Deployment Governance and asks the reader to isolate the key signal in GitHub. Change detection logic can fail when repository history strategy changes even if file p...CI/CDIntermediate13 minProCICD-1343A GitHub Actions workflow uploads an artifact and later cannot download itA GitHub Actions workflow uploads an artifact and later cannot download it focuses on Artifact Promotion and asks the reader to isolate the key signal in GitHub. Artifact errors after matrix refactors are often naming contract drift, not stora...CI/CDIntermediate13 minProCICD-1319A release pipeline skips only one workspaceA monorepo narrows CI to changed workspaces and later renamed components stop triggering expected builds.CI/CDIntermediate13 minProCICD-1365A remote Terraform module fetch works from developer laptops and fails in...A remote Terraform module fetch works from developer laptops and fails in... focuses on Identity And Access and asks the reader to isolate the key signal in hashicorp. Remote execution can fail on trust bootstrap even when credentials are correct.CI/CDIntermediate13 minProCICD-1329A reusable workflow loses one environment secretA platform team refactors a shared workflow interface and only one environment later loses the deployment secret at runtime.CI/CDIntermediate13 minProCICD-1313A reusable workflow publishes one package and skips anotherA monorepo release job uses a shared workflow and later only certain packages stop publishing without a top-level workflow crash.CI/CDIntermediate13 minProCICD-1331A BuildKit bake job rebuilds every stageA team hardens build runners and later sees every image rebuild from scratch despite cache exporters looking healthy.CI/CDIntermediate14 minProCICD-1298A deployment queue never drainsA release lane becomes permanently slow or blocked after a naming cleanup in GitHub Actions.CI/CDIntermediate14 minProCICD-1288A deployment script references the correct environment file locally but CI uses the repository root as cwd, so the same relative path resolves to yesterday's stale copyThe script is correct in an app subdirectory, yet the runner executes it from another working directory and picks up a different file with the same name.CI/CDIntermediate14 minProCICD-1311A Docker build works locally and fails in CIA team combines compose watch and CI image builds and later finds one generated config file never reaches the build in automation.CI/CDIntermediate14 minProCICD-1353A GitHub Actions deploy to a private cluster works on manual dispatch and...A GitHub Actions deploy to a private cluster works on manual dispatch and... focuses on Deployment Governance and asks the reader to isolate the key signal in GitHub. Release and manual workflows can carry the same code and very dif...CI/CDIntermediate14 minProCICD-1335A Helm deploy from CodeBuild loses AWS auth only in one projectA private CodeBuild environment is hardened with VPC endpoints and later only one deploy job starts failing AWS auth inside the build container.CI/CDIntermediate14 minProCICD-1317A merge queue never advancesA repository enables merge queue and later finds queued items blocked even though normal pull request checks pass consistently.CI/CDIntermediate14 minProCICD-1327A private registry supports login and large layer pulls failA registry migration preserves the endpoint and later some larger images fail only on flaky links or resumed pulls.CI/CDIntermediate14 minProCICD-1341A rootless BuildKit runner pushes images fine and later fails cache exportA platform team hardens self-hosted builders and later sees images push normally while layer cache export intermittently disappears between runs.CI/CDIntermediate14 minProCICD-1286A workflow succeeds in one branch but fails in anotherA generated certificate, JSON blob, or changelog is written to GITHUB_ENV and only some branches or shells later consume a broken value.CI/CDIntermediate14 minPro