AWS DevOps Engineer Professional
942 incident response problems that help with AWS DevOps Engineer Professional prep.
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All problems (942)
CICD-036CodeDeploy rollback alarm never firesThe blue-green deployment partially shifts traffic, but the rollback condition never triggers because the health alarm watches only the stable target group.CI/CDAdvanced27 minProCICD-052Reusable workflow caller changes the OIDC subject and breaks deploy role trustThe same deployment worked as a repository-local workflow, but it fails after moving into a reusable workflow because the token subject no longer matches the original trust condition.CI/CDAdvanced27 minProCICD-032OIDC subject condition mismatch denies AWS deploy role assumptionGitHub Actions reaches AWS STS, but the trust policy rejects the web identity token because the subject or audience condition no longer matches the branch and environment path.CI/CDAdvanced28 minProCICD-026Promotion pipeline deploys stale image from previous commitThe promotion stage uses an artifact reference that looks correct but resolves to an older image digest after registry cleanup.CI/CDAdvanced29 minProCICD-040Terraform apply succeeds in staging but production backend locks a different state tableThe same pipeline logic passes against one workspace, but production never converges because the remote backend, state lock table, or workspace mapping differs subtly.CI/CDAdvanced30 minProCICD-1587A Helm provenance job validates at origin and fails at one proxyOne proxy path fails Helm provenance checks after republishing the chart.CI/CDAdvanced10 minProCICD-1575An ApplicationSet renders the new branch map and one app still deploys the old refOne Argo CD application keeps syncing the old branch after branch map cleanup.CI/CDAdvanced10 minProCICD-1595An Argo CD OCI repo works and one app still syncs the old chartOne Argo CD app keeps syncing the old chart after OCI registry cleanup.CI/CDAdvanced10 minProCICD-1605An Argo CD repo update is correct and one application still syncs the old chartOne Argo CD app still syncs the old chart after registry cleanup.CI/CDAdvanced10 minProCICD-1585An Argo CD sync is healthy and one app still deploys the old chartOne Argo CD app syncs the old chart after OCI repository cleanup.CI/CDAdvanced10 minProCICD-1516A Flux automation commit updates the image tag and the cluster still deploys old bitsOne cluster keeps deploying the older image even though Git and registry tags look correct.CI/CDAdvanced11 minProCICD-1526A Flux image update lands and rollback failsRollbacks fail only after digest alias cleanup in a GitOps image automation flow.CI/CDAdvanced11 minProCICD-1501A GitHub OIDC deploy succeeds in test and fails in prodOnly production deploys fail after an AWS federation alias cleanup while test continues to work.CI/CDAdvanced11 minProCICD-1591A GitHub OIDC deployment still fails in one accountDeployments fail only in one account after consolidating environment aliases.CI/CDAdvanced11 minProCICD-1536A GitOps image update lands and rollback failsRollbacks fail only after registry digest alias cleanup in a GitOps workflow.CI/CDAdvanced11 minProCICD-1546A GitOps image update lands and rollback failsRollbacks fail only after digest alias cleanup in a GitOps flow.CI/CDAdvanced11 minProCICD-1534A registry mirror serves the new image and signature verification still failsSignature verification fails only through one mirror tier after edge caching is enabled.CI/CDAdvanced11 minProCICD-1487A rootless GitHub runner survives reboots and loses Docker accessSelf-hosted runners fail only after host reboots on hardened images with rootless Docker.CI/CDAdvanced11 minProCICD-1558A self-hosted runner image adds rootless Docker and one job still failsOnly restored runners fail image builds after moving to rootless Docker.CI/CDAdvanced11 minProCICD-1493A Terraform Cloud speculative plan finishes and the comment never appearsDevelopers see completed speculative plans in Terraform Cloud but no PR comment after enabling an internal webhook relay.CI/CDAdvanced11 minPro