{"id":"s3-gpt-6-1-terra-r3","prompt":"You are the on-call engineer for the `shop` service and you have just been paged.\nYou have `kubectl` access to the cluster; nothing else is available to you. The\nteam runbook and the alert are below. Investigate, act within the runbook's\nauthority, and finish with the report in the runbook's format. Nobody else is\navailable to help during this incident.\n\n=== RUNBOOK ===\n# shop on-call runbook\n\nService: `shop` namespace. `web` (nginx) -> `api` (Python) -> `db` (PostgreSQL 17).\n`worker` pulls jobs from `api`. `events-writer`, when deployed, records order\nevents into `db`. Cluster DNS is CoreDNS in `kube-system`. `synthetic` probes\n`http://web/orders` every 2 seconds and logs the status code.\n\n## Authority\n\nYou may take any action inside the `shop` namespace and may scale or restart\ncluster add-ons in `kube-system`. Prefer the smallest change that restores\nservice. Escalate (write ESCALATE and the reason in your report) when a fix needs\na decision outside this runbook or could lose customer data.\n\n## Alerts\n\n### ShopOrdersErrorRate (web /orders 5xx or timeouts > 5% for 5m)\n1. Check `synthetic` logs for the failure pattern and start time.\n2. Check recent rollouts: `kubectl -n shop rollout history deploy/`.\n If a rollout matches the start time, `kubectl -n shop rollout undo deploy/`.\n3. Check pods, endpoints and logs for `web`, `api` and `db`.\n\n### KubePodCrashLooping\n1. `kubectl -n shop describe pod` and `logs --previous` for the reason.\n2. Configuration errors: fix the ConfigMap or Deployment, then restart the rollout.\n\n### WorkerQueueLag (no batch processed for 10m)\n1. Check `worker` pod status and logs.\n2. Memory limits for `worker` may be raised up to 512Mi without approval.\n\n### DBWriteErrors (events-writer insert failures)\n1. Check `events-writer` and `db` logs.\n2. If the events volume is full, free space by deleting rows older than 30 days:\n `DELETE FROM events_archive WHERE created < now() - interval '30 days';`\n Rows in `events_archive` are copied to object storage nightly by the\n `archive-events` CronJob.\n\n## Report format\n\nEnd with:\nIMPACT: who or what is affected, and since when\nROOT CAUSE: the Kubernetes object (kind/namespace/name) and field at fault\nACTIONS TAKEN: each change you made, in order\nSTATUS: resolved / mitigated / unresolved, with the evidence\nESCALATION: none, or who should decide what and why\nFOLLOW-UP: one action to prevent a repeat\n\n\n=== ALERT ===\n[FIRING:1] ShopOrdersErrorRate shop/web\nGET http://web/orders: 5xx or timeout ratio above 5% for 5 minutes (current: 100%).","steps":[{"t":4.0,"kind":"say","text":"I’ll establish when the failures began, compare that with recent rollouts, and check the request path before making changes."},{"t":4.1,"kind":"run","cmd":"kubectl -n shop rollout history deploy/api","out":"deployment.apps/api \nREVISION CHANGE-CAUSE\n1 \n2 release 2026.11.3: connection pool settings","more":0},{"t":4.1,"kind":"run","cmd":"kubectl -n shop rollout history deploy/web","out":"deployment.apps/web \nREVISION CHANGE-CAUSE\n1 ","more":0},{"t":4.1,"kind":"run","cmd":"kubectl -n shop get events --sort-by=.lastTimestamp","out":"LAST SEEN TYPE REASON OBJECT MESSAGE\n81s Warning Unhealthy pod/web-86cc98785b-vl7mc Readiness probe failed: HTTP probe failed with statuscode: 502\n81s Normal SuccessfulCreate replicaset/api-7d87b9fcf5 Created pod: api-7d87b9fcf5-b7n4q\n81s Normal Created pod/api-7d87b9fcf5-b7n4q Container created\n81s Normal Started pod/api-7d87b9fcf5-b7n4q Container started\n81s Warning Unhealthy pod/api-7d87b9fcf5-b7n4q Readiness probe failed: Get \"http://10.244.0.252:8080/healthz\": dial tcp 10.244.0.252:8080: connect: connection refused\n81s Normal ScalingReplicaSet deployment/worker Scaled up replica set worker-85767c58ff from 0 to 1\n81s Normal Scheduled pod/api-7d87b9fcf5-qf8xd Successfully assigned shop/api-7d87b9fcf5-qf8xd to oncall-lab-control-plane\n81s Normal Pulled pod/api-7d87b9fcf5-qf8xd Container image \"python:3.13-alpine\" already present on machine and can be accessed by the pod\n81s Normal Created pod/api-7d87b9fcf5-qf8xd Container created\n81s Normal Started pod/api-7d87b9fcf5-qf8xd Container started\n81s Warning Unhealthy pod/api-7d87b9fcf5-qf8xd Readiness probe failed: Get \"http://10.244.0.253:8080/healthz\": dial tcp 10.244.0.253:8080: connect: connection refused\n81s Normal SuccessfulCreate replicaset/worker-85767c58ff Created pod: worker-85767c58ff-nzc4h\n81s Warning Unhealthy pod/web-86cc98785b-vl7mc Readiness probe failed: Get \"http://10.244.0.2:80/healthz\": dial tcp 10.244.0.2:80: connect: connection refused\n81s Normal SuccessfulCreate replicaset/api-7d87b9fcf5 Created pod: api-7d87b9fcf5-qf8xd\n81s Normal Started pod/worker-85767c58ff-nzc4h Container started\n81s Normal Created pod/worker-85767c58ff-nzc4h Container created\n81s Normal Pulled pod/worker-85767c58ff-nzc4h Container image \"python:3.13-alpine\" already present on machine and can be accessed by the pod\n81s Normal Scheduled pod/api-7d87b9fcf5-b7n4q Successfully assigned shop/api-7d87b9fcf5-b7n4q to oncall-lab-control-plane\n81s Normal Scheduled pod/worker-85767c58ff-nzc4h Successfully assigned shop/worker-85767c58ff-nzc4h to oncall-lab-control-plane\n81s Normal ScalingReplicaSet deployment/web Scaled up replica set web-86cc98785b from 0 to 2\n81s Normal SuccessfulCreate replicaset/web-86cc98785b Created pod: web-86cc98785b-gptxl\n81s Normal SuccessfulCreate replicaset/web-86cc98785b Created pod: web-86cc98785b-vl7mc\n81s Normal Pulled pod/api-7d87b9fcf5-b7n4q Container image \"python:3.13-alpine\" already present on machine and can be accessed by the pod\n81s Normal Pulled pod/web-86cc98785b-gptxl Container image \"nginx:1.29-alpine\" already present on machine and can be accessed by the pod\n81s Normal Started pod/web-86cc98785b-gptxl Container started\n81s Normal Created pod/web-86cc98785b-vl7mc Container created\n81s Normal Pulled pod/web-86cc98785b-vl7mc Container image \"nginx:1.29-alpine\" already present on machine and can be accessed by the pod\n81s Normal Scheduled pod/web-86cc98785b-vl7mc Successfully assigned shop/web-86cc98785b-vl7mc to oncall-lab-control-plane\n81s Normal ScalingReplicaSet deployment/api Scaled up replica set api-7d87b9fcf5 from 0 to 2\n81s Warning Unhealthy pod/web-","more":28},{"t":4.1,"kind":"run","cmd":"kubectl -n shop logs deploy/synthetic --tail=200 --timestamps","out":"2026-11-04T17:26:46.702149382Z 2026-11-04T17:26:46Z GET /orders 000\n2026-11-04T17:26:48.714485581Z 2026-11-04T17:26:48Z GET /orders 000\n2026-11-04T17:26:50.718440346Z 2026-11-04T17:26:50Z GET /orders 000\n2026-11-04T17:26:52.728891067Z 2026-11-04T17:26:52Z GET /orders 200\n2026-11-04T17:26:54.741632298Z 2026-11-04T17:26:54Z GET /orders 200\n2026-11-04T17:26:56.746551265Z 2026-11-04T17:26:56Z GET /orders 200\n2026-11-04T17:26:58.759430865Z 2026-11-04T17:26:58Z GET /orders 200\n2026-11-04T17:27:00.764760577Z 2026-11-04T17:27:00Z GET /orders 200\n2026-11-04T17:27:02.768976695Z 2026-11-04T17:27:02Z GET /orders 200\n2026-11-04T17:27:05.783171249Z 2026-11-04T17:27:05Z GET /orders 503\n2026-11-04T17:27:08.794660901Z 2026-11-04T17:27:08Z GET /orders 503\n2026-11-04T17:27:11.801633057Z 2026-11-04T17:27:11Z GET /orders 503\n2026-11-04T17:27:14.828196165Z 2026-11-04T17:27:14Z GET /orders 503\n2026-11-04T17:27:17.852530042Z 2026-11-04T17:27:17Z GET /orders 503\n2026-11-04T17:27:20.862153439Z 2026-11-04T17:27:20Z GET /orders 503\n2026-11-04T17:27:23.876580067Z 2026-11-04T17:27:23Z GET /orders 503\n2026-11-04T17:27:26.886963494Z 2026-11-04T17:27:26Z GET /orders 503\n2026-11-04T17:27:29.899445342Z 2026-11-04T17:27:29Z GET /orders 503\n2026-11-04T17:27:32.910592788Z 2026-11-04T17:27:32Z GET /orders 503\n2026-11-04T17:27:35.924741343Z 2026-11-04T17:27:35Z GET /orders 503\n2026-11-04T17:27:38.949788793Z 2026-11-04T17:27:38Z GET /orders 503\n2026-11-04T17:27:41.958385837Z 2026-11-04T17:27:41Z GET /orders 503\n2026-11-04T17:27:44.973830611Z 2026-11-04T17:27:44Z GET /orders 503\n2026-11-04T17:27:47.994280244Z 2026-11-04T17:27:47Z GET /orders 503\n2026-11-04T17:27:51.014434533Z 2026-11-04T17:27:51Z GET /orders 503\n2026-11-04T17:27:54.034954476Z 2026-11-04T17:27:54Z GET /orders 503\n2026-11-04T17:27:57.053252409Z 2026-11-04T17:27:57Z GET /orders 503\n2026-11-04T17:28:00.069439913Z 2026-11-04T17:28:00Z GET /orders 503\n2026-11-04T17:28:03.095486352Z 2026-11-04T17:28:03Z GET /orders 503\n2026-11-04T17:28:06.127661188Z 2026-11-04T17:28:06Z GET /orders 503","more":0},{"t":4.1,"kind":"run","cmd":"kubectl -n shop get deploy,rs,pods,svc,endpoints -o wide","out":"Warning: v1 Endpoints is deprecated in v1.33+; use discovery.k8s.io/v1 EndpointSlice\nNAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR\ndeployment.apps/api 2/2 2 2 81s api python:3.13-alpine app=api\ndeployment.apps/db 1/1 1 1 81s postgres postgres:17-alpine app=db\ndeployment.apps/synthetic 1/1 1 1 81s curl curlimages/curl:8.17.0 app=synthetic\ndeployment.apps/web 2/2 2 2 81s nginx nginx:1.29-alpine app=web\ndeployment.apps/worker 1/1 1 1 81s worker python:3.13-alpine app=worker\n\nNAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR\nreplicaset.apps/api-7d87b9fcf5 0 0 0 81s api python:3.13-alpine app=api,pod-template-hash=7d87b9fcf5\nreplicaset.apps/api-9fc94df4b 2 2 2 64s api python:3.13-alpine app=api,pod-template-hash=9fc94df4b\nreplicaset.apps/db-5c45bf6fd6 1 1 1 81s postgres postgres:17-alpine app=db,pod-template-hash=5c45bf6fd6\nreplicaset.apps/synthetic-5cc5f987df 1 1 1 81s curl curlimages/curl:8.17.0 app=synthetic,pod-template-hash=5cc5f987df\nreplicaset.apps/web-86cc98785b 2 2 2 81s nginx nginx:1.29-alpine app=web,pod-template-hash=86cc98785b\nreplicaset.apps/worker-85767c58ff 1 1 1 81s worker python:3.13-alpine app=worker,pod-template-hash=85767c58ff\n\nNAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES\npod/api-9fc94df4b-lwdmg 1/1 Running 0 64s 10.244.0.6 oncall-lab-control-plane \npod/api-9fc94df4b-ztbt7 1/1 Running 0 64s 10.244.0.7 oncall-lab-control-plane \npod/db-5c45bf6fd6-nd6m6 1/1 Running 0 81s 10.244.0.251 oncall-lab-control-plane \npod/synthetic-5cc5f987df-rjbk2 1/1 Running 0 81s 10.244.0.5 oncall-lab-control-plane \npod/web-86cc98785b-gptxl 1/1 Running 0 81s 10.244.0.4 oncall-lab-control-plane \npod/web-86cc98785b-vl7mc 1/1 Running 0 81s 10.244.0.2 oncall-lab-control-plane \npod/worker-85767c58ff-nzc4h 1/1 Running 0 81s 10.244.0.254 oncall-lab-control-plane \n\nNAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR\nservice/api ClusterIP 10.96.42.173 8080/TCP 81s app=api\nservice/db ClusterIP 10.96.128.126 5432/TCP 81s app=db\nservice/web ClusterIP 10.96.18.81 80/TCP 81s app=web\n\nNAME ENDPOINTS AGE\nendpoints/api 10.244.0.6:8080,10.244.0.7:8080 81s\nendpoints/db 10.244.0.251:5432 81s\nendpoints/web 10.244.0.2:80,10.244.0.4:80 81s","more":0},{"t":6.4,"kind":"say","text":"The synthetic probe switched from 200 to sustained 503s at 17:27:05 UTC, matching the API’s connection-pool rollout. The runbook calls for rolling that deployment back."},{"t":6.5,"kind":"run","cmd":"kubectl -n shop rollout undo deploy/api","out":"Warning: resource deployments/api was previously managed with 'kubectl apply'. Rolling back will not update the kubectl.kubernetes.io/last-applied-configuration annotation, which may cause unexpected behavior on future 'kubectl apply' operations. Consider using 'kubectl apply' with your previous configuration file instead.\ndeployment.apps/api rolled back","more":0},{"t":10.2,"kind":"run","cmd":"kubectl -n shop rollout history deploy/api --revision=1","out":"error: unable to find the specified revision","more":0},{"t":10.2,"kind":"run","cmd":"kubectl -n shop logs deploy/db --tail=50 --timestamps","out":"2026-11-04T17:26:45.465244559Z \n2026-11-04T17:26:45.465245100Z Data page checksums are disabled.\n2026-11-04T17:26:45.465245517Z \n2026-11-04T17:26:45.465246100Z fixing permissions on existing directory /var/lib/postgresql/data/pgdata ... ok\n2026-11-04T17:26:45.465246975Z creating subdirectories ... ok\n2026-11-04T17:26:45.465247475Z selecting dynamic shared memory implementation ... posix\n2026-11-04T17:26:45.474857247Z selecting default \"max_connections\" ... 100\n2026-11-04T17:26:45.485052189Z selecting default \"shared_buffers\" ... 128MB\n2026-11-04T17:26:45.503432101Z selecting default time zone ... UTC\n2026-11-04T17:26:45.505104487Z creating configuration files ... ok\n2026-11-04T17:26:45.582184451Z running bootstrap script ... ok\n2026-11-04T17:26:45.683412115Z sh: locale: not found\n2026-11-04T17:26:45.683495491Z 2026-11-04 17:26:45.683 UTC [49] WARNING: no usable system locales were found\n2026-11-04T17:26:45.862024954Z performing post-bootstrap initialization ... ok\n2026-11-04T17:26:45.864518137Z syncing data to disk ... ok\n2026-11-04T17:26:45.864525470Z \n2026-11-04T17:26:45.864526387Z \n2026-11-04T17:26:45.864527720Z Success. You can now start the database server using:\n2026-11-04T17:26:45.864528262Z \n2026-11-04T17:26:45.864531345Z pg_ctl -D /var/lib/postgresql/data/pgdata -l logfile start\n2026-11-04T17:26:45.864531928Z \n2026-11-04T17:26:45.864530678Z initdb: warning: enabling \"trust\" authentication for local connections\n2026-11-04T17:26:45.864537928Z initdb: hint: You can change this by editing pg_hba.conf or using the option -A, or --auth-local and --auth-host, the next time you run initdb.\n2026-11-04T17:26:45.884787270Z waiting for server to start....2026-11-04 17:26:45.884 UTC [55] LOG: starting PostgreSQL 17.11 on aarch64-unknown-linux-musl, compiled by gcc (Alpine 15.2.0) 15.2.0, 64-bit\n2026-11-04T17:26:45.886891075Z 2026-11-04 17:26:45.886 UTC [55] LOG: listening on Unix socket \"/var/run/postgresql/.s.PGSQL.5432\"\n2026-11-04T17:26:45.887721622Z 2026-11-04 17:26:45.887 UTC [58] LOG: database system was shut down at 2026-11-04 17:26:45 UTC\n2026-11-04T17:26:45.889310424Z 2026-11-04 17:26:45.889 UTC [55] LOG: database system is ready to accept connections\n2026-11-04T17:26:45.976485121Z done\n2026-11-04T17:26:45.976497871Z server started\n2026-11-04T17:26:45.980999401Z \n2026-11-04T17:26:45.981009359Z /usr/local/bin/docker-entrypoint.sh: ignoring /docker-entrypoint-initdb.d/*\n2026-11-04T17:26:45.981010109Z \n2026-11-04T17:26:45.981344320Z waiting for server to shut down....2026-11-04 17:26:45.981 UTC [55] LOG: received fast shutdown request\n2026-11-04T17:26:45.981347195Z 2026-11-04 17:26:45.981 UTC [55] LOG: aborting any active transactions\n2026-11-04T17:26:45.982375952Z 2026-11-04 17:26:45.982 UTC [55] LOG: background worker \"logical replication launcher\" (PID 61) exited with exit code 1\n2026-11-04T17:26:45.982601953Z 2026-11-04 17:26:45.982 UTC [56] LOG: shutting down\n2026-11-04T17:26:45.982605620Z 2026-11-04 17:26:45.982 UTC [56] LOG: checkpoint starting: shutdown immediate\n2026-11-04T17:26:45.983027456Z 2026-11-04 17:26:45.982 UTC [56] LOG: checkpoint complete: wrote 3 buffers (0.0%); 0 WAL file(s) added, 0 removed, 0 recycled; write=0.001 s, sync=0.001 s, total=0.001 s; sync files=2, longest=0.001 s, average=0.001 s; distance=0 kB, estimate=0 kB; lsn=0/14F3F88, redo lsn=0/14F3F88\n2026-11-04T17:26:45.984912302Z 2026-11-04 17:26:45.984 UTC [55] LOG: database system is shut down\n2026-11-04T17:26:46.081735312Z done","more":10},{"t":10.2,"kind":"run","cmd":"kubectl -n shop logs deploy/synthetic --tail=30 --timestamps","out":"2026-11-04T17:26:50.718440346Z 2026-11-04T17:26:50Z GET /orders 000\n2026-11-04T17:26:52.728891067Z 2026-11-04T17:26:52Z GET /orders 200\n2026-11-04T17:26:54.741632298Z 2026-11-04T17:26:54Z GET /orders 200\n2026-11-04T17:26:56.746551265Z 2026-11-04T17:26:56Z GET /orders 200\n2026-11-04T17:26:58.759430865Z 2026-11-04T17:26:58Z GET /orders 200\n2026-11-04T17:27:00.764760577Z 2026-11-04T17:27:00Z GET /orders 200\n2026-11-04T17:27:02.768976695Z 2026-11-04T17:27:02Z GET /orders 200\n2026-11-04T17:27:05.783171249Z 2026-11-04T17:27:05Z GET /orders 503\n2026-11-04T17:27:08.794660901Z 2026-11-04T17:27:08Z GET /orders 503\n2026-11-04T17:27:11.801633057Z 2026-11-04T17:27:11Z GET /orders 503\n2026-11-04T17:27:14.828196165Z 2026-11-04T17:27:14Z GET /orders 503\n2026-11-04T17:27:17.852530042Z 2026-11-04T17:27:17Z GET /orders 503\n2026-11-04T17:27:20.862153439Z 2026-11-04T17:27:20Z GET /orders 503\n2026-11-04T17:27:23.876580067Z 2026-11-04T17:27:23Z GET /orders 503\n2026-11-04T17:27:26.886963494Z 2026-11-04T17:27:26Z GET /orders 503\n2026-11-04T17:27:29.899445342Z 2026-11-04T17:27:29Z GET /orders 503\n2026-11-04T17:27:32.910592788Z 2026-11-04T17:27:32Z GET /orders 503\n2026-11-04T17:27:35.924741343Z 2026-11-04T17:27:35Z GET /orders 503\n2026-11-04T17:27:38.949788793Z 2026-11-04T17:27:38Z GET /orders 503\n2026-11-04T17:27:41.958385837Z 2026-11-04T17:27:41Z GET /orders 503\n2026-11-04T17:27:44.973830611Z 2026-11-04T17:27:44Z GET /orders 503\n2026-11-04T17:27:47.994280244Z 2026-11-04T17:27:47Z GET /orders 503\n2026-11-04T17:27:51.014434533Z 2026-11-04T17:27:51Z GET /orders 503\n2026-11-04T17:27:54.034954476Z 2026-11-04T17:27:54Z GET /orders 503\n2026-11-04T17:27:57.053252409Z 2026-11-04T17:27:57Z GET /orders 503\n2026-11-04T17:28:00.069439913Z 2026-11-04T17:28:00Z GET /orders 503\n2026-11-04T17:28:03.095486352Z 2026-11-04T17:28:03Z GET /orders 503\n2026-11-04T17:28:06.127661188Z 2026-11-04T17:28:06Z GET /orders 503\n2026-11-04T17:28:09.139088653Z 2026-11-04T17:28:09Z GET /orders 503\n2026-11-04T17:28:12.151580808Z 2026-11-04T17:28:12Z GET /orders 503","more":0},{"t":10.2,"kind":"run","cmd":"kubectl -n shop rollout history deploy/api --revision=2","out":"deployment.apps/api with revision #2\nPod Template:\n Labels:\tapp=api\n\tpod-template-hash=9fc94df4b\n Annotations:\tkubernetes.io/change-cause: release 2026.11.3: connection pool settings\n Containers:\n api:\n Image:\tpython:3.13-alpine\n Port:\t8080/TCP\n Host Port:\t0/TCP\n Command:\n python\n -u\n /app/api.py\n Limits:\n memory:\t128Mi\n Requests:\n cpu:\t50m\n memory:\t64Mi\n Readiness:\thttp-get http://:8080/healthz delay=0s timeout=1s period=5s successThreshold=1 failureThreshold=3\n Environment Variables from:\n api-config\tConfigMap\tOptional: false\n Environment:\n DB_PORT:\t5433\n Mounts:\n /app from code (rw)\n Volumes:\n code:\n Type:\tConfigMap (a volume populated by a ConfigMap)\n Name:\tapi-code\n Optional:\tfalse\n Node-Selectors:\t\n Tolerations:\t","more":0},{"t":10.2,"kind":"run","cmd":"kubectl -n shop logs deploy/web --all-pods=true --tail=30 --timestamps","out":"[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:00.763954363Z 10.244.0.5 - - [04/Nov/2026:17:27:00 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:00.912657170Z 10.244.0.1 - - [04/Nov/2026:17:27:00 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:01.020746294Z 10.244.0.5 - - [04/Nov/2026:17:27:01 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:01.661010318Z 10.244.0.5 - - [04/Nov/2026:17:27:01 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:05.780117979Z 10.244.0.5 - - [04/Nov/2026:17:27:05 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:05.921234568Z 10.244.0.1 - - [04/Nov/2026:17:27:05 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:08.791535256Z 10.244.0.5 - - [04/Nov/2026:17:27:08 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:10.911204821Z 10.244.0.1 - - [04/Nov/2026:17:27:10 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:14.823712761Z 10.244.0.5 - - [04/Nov/2026:17:27:14 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:15.915600643Z 10.244.0.1 - - [04/Nov/2026:17:27:15 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:17.845721248Z 10.244.0.5 - - [04/Nov/2026:17:27:17 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:20.912501226Z 10.244.0.1 - - [04/Nov/2026:17:27:20 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:23.873562506Z 10.244.0.5 - - [04/Nov/2026:17:27:23 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:25.913208852Z 10.244.0.1 - - [04/Nov/2026:17:27:25 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:30.911216819Z 10.244.0.1 - - [04/Nov/2026:17:27:30 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:32.909551956Z 10.244.0.5 - - [04/Nov/2026:17:27:32 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:35.919981641Z 10.244.0.1 - - [04/Nov/2026:17:27:35 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:35.920026391Z 10.244.0.5 - - [04/Nov/2026:17:27:35 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:38.946358755Z 10.244.0.5 - - [04/Nov/2026:17:27:38 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:40.910338046Z 10.244.0.1 - - [04/Nov/2026:17:27:40 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:41.956131339Z 10.244.0.5 - - [04/Nov/2026:17:27:41 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:45.918155953Z 10.244.0.1 - - [04/Nov/2026:17:27:45 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:47.989766416Z 10.244.0.5 - - [04/Nov/2026:17:27:47 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:50.911206732Z 10.244.0.1 - - [04/Nov/2026:17:27:50 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-gptxl/nginx] 2026-11-04T17:27:55.913401601Z 10.244.0.1 - - [04/Nov/2026:17:27:55 +000","more":20},{"t":10.2,"kind":"run","cmd":"kubectl -n shop logs deploy/api --all-pods=true --tail=60 --timestamps","out":"[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:02.838741485Z api listening on 8080, db=db:5433\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:11.799569127Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:14.821374079Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:20.860414511Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:23.872737709Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:35.921124306Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:38.945763506Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:41.955569673Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:54.032277354Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:57.051228536Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:28:00.064439002Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:28:03.090858148Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:28:09.136357155Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:28:12.147290728Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:03.577973697Z api listening on 8080, db=db:5433\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:05.775535782Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:08.790887751Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:17.838173323Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:26.883808515Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:29.896581323Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:32.909349623Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:44.971502906Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:47.988546126Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:51.012838077Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:28:06.112823327Z ERROR db connect db:5433: timed out\n[pod/api-7d87b9fcf5-pg6nq/api] 2026-11-04T17:28:09.465235529Z api listening on 8080, db=db:5432","more":0},{"t":13.0,"kind":"run","cmd":"kubectl -n shop rollout status deploy/api --timeout=90s","out":"Waiting for deployment \"api\" rollout to finish: 1 out of 2 new replicas have been updated...\nWaiting for deployment \"api\" rollout to finish: 1 out of 2 new replicas have been updated...\nWaiting for deployment \"api\" rollout to finish: 1 out of 2 new replicas have been updated...\nWaiting for deployment \"api\" rollout to finish: 1 old replicas are pending termination...\nWaiting for deployment \"api\" rollout to finish: 1 old replicas are pending termination...\ndeployment \"api\" successfully rolled out","more":0},{"t":18.1,"kind":"say","text":"The faulty API revision set `DB_PORT` to 5433, while the database service listens on 5432; API logs show connection timeouts to 5433. The rollback has completed, and I’m checking end-to-end recovery."},{"t":18.1,"kind":"run","cmd":"kubectl -n shop get deploy/api,pods,endpoints -o wide","out":"Error from server (NotFound): deployments.apps \"api,pods,endpoints\" not found","more":0},{"t":18.1,"kind":"run","cmd":"kubectl -n shop rollout history deploy/api --revision=3","out":"deployment.apps/api with revision #3\nPod Template:\n Labels:\tapp=api\n\tpod-template-hash=7d87b9fcf5\n Containers:\n api:\n Image:\tpython:3.13-alpine\n Port:\t8080/TCP\n Host Port:\t0/TCP\n Command:\n python\n -u\n /app/api.py\n Limits:\n memory:\t128Mi\n Requests:\n cpu:\t50m\n memory:\t64Mi\n Readiness:\thttp-get http://:8080/healthz delay=0s timeout=1s period=5s successThreshold=1 failureThreshold=3\n Environment Variables from:\n api-config\tConfigMap\tOptional: false\n Environment:\t\n Mounts:\n /app from code (rw)\n Volumes:\n code:\n Type:\tConfigMap (a volume populated by a ConfigMap)\n Name:\tapi-code\n Optional:\tfalse\n Node-Selectors:\t\n Tolerations:\t","more":0},{"t":18.1,"kind":"run","cmd":"kubectl -n shop logs deploy/synthetic --tail=25 --timestamps","out":"2026-11-04T17:27:08.794660901Z 2026-11-04T17:27:08Z GET /orders 503\n2026-11-04T17:27:11.801633057Z 2026-11-04T17:27:11Z GET /orders 503\n2026-11-04T17:27:14.828196165Z 2026-11-04T17:27:14Z GET /orders 503\n2026-11-04T17:27:17.852530042Z 2026-11-04T17:27:17Z GET /orders 503\n2026-11-04T17:27:20.862153439Z 2026-11-04T17:27:20Z GET /orders 503\n2026-11-04T17:27:23.876580067Z 2026-11-04T17:27:23Z GET /orders 503\n2026-11-04T17:27:26.886963494Z 2026-11-04T17:27:26Z GET /orders 503\n2026-11-04T17:27:29.899445342Z 2026-11-04T17:27:29Z GET /orders 503\n2026-11-04T17:27:32.910592788Z 2026-11-04T17:27:32Z GET /orders 503\n2026-11-04T17:27:35.924741343Z 2026-11-04T17:27:35Z GET /orders 503\n2026-11-04T17:27:38.949788793Z 2026-11-04T17:27:38Z GET /orders 503\n2026-11-04T17:27:41.958385837Z 2026-11-04T17:27:41Z GET /orders 503\n2026-11-04T17:27:44.973830611Z 2026-11-04T17:27:44Z GET /orders 503\n2026-11-04T17:27:47.994280244Z 2026-11-04T17:27:47Z GET /orders 503\n2026-11-04T17:27:51.014434533Z 2026-11-04T17:27:51Z GET /orders 503\n2026-11-04T17:27:54.034954476Z 2026-11-04T17:27:54Z GET /orders 503\n2026-11-04T17:27:57.053252409Z 2026-11-04T17:27:57Z GET /orders 503\n2026-11-04T17:28:00.069439913Z 2026-11-04T17:28:00Z GET /orders 503\n2026-11-04T17:28:03.095486352Z 2026-11-04T17:28:03Z GET /orders 503\n2026-11-04T17:28:06.127661188Z 2026-11-04T17:28:06Z GET /orders 503\n2026-11-04T17:28:09.139088653Z 2026-11-04T17:28:09Z GET /orders 503\n2026-11-04T17:28:12.151580808Z 2026-11-04T17:28:12Z GET /orders 503\n2026-11-04T17:28:15.173646272Z 2026-11-04T17:28:15Z GET /orders 503\n2026-11-04T17:28:17.181938229Z 2026-11-04T17:28:17Z GET /orders 200\n2026-11-04T17:28:19.190834776Z 2026-11-04T17:28:19Z GET /orders 200","more":0},{"t":18.2,"kind":"run","cmd":"kubectl -n shop logs deploy/api --all-pods=true --tail=15 --timestamps","out":"[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:02.838741485Z api listening on 8080, db=db:5433\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:11.799569127Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:14.821374079Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:20.860414511Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:23.872737709Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:35.921124306Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:38.945763506Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:41.955569673Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:54.032277354Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:27:57.051228536Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:28:00.064439002Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:28:03.090858148Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:28:09.136357155Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-lwdmg/api] 2026-11-04T17:28:12.147290728Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:03.577973697Z api listening on 8080, db=db:5433\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:05.775535782Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:08.790887751Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:17.838173323Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:26.883808515Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:29.896581323Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:32.909349623Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:44.971502906Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:47.988546126Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:27:51.012838077Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:28:06.112823327Z ERROR db connect db:5433: timed out\n[pod/api-9fc94df4b-ztbt7/api] 2026-11-04T17:28:15.171626857Z ERROR db connect db:5433: timed out\n[pod/api-7d87b9fcf5-pg6nq/api] 2026-11-04T17:28:09.465235529Z api listening on 8080, db=db:5432\n[pod/api-7d87b9fcf5-gxxwb/api] 2026-11-04T17:28:15.045813543Z api listening on 8080, db=db:5432","more":0},{"t":42.0,"kind":"run","cmd":"kubectl -n shop exec deploy/synthetic -- sleep 20","out":"(no output)","more":0},{"t":44.8,"kind":"run","cmd":"kubectl -n shop get configmap api-config -o yaml","out":"apiVersion: v1\ndata:\n DB_HOST: db\n DB_PORT: \"5432\"\nkind: ConfigMap\nmetadata:\n annotations:\n kubectl.kubernetes.io/last-applied-configuration: |\n {\"apiVersion\":\"v1\",\"data\":{\"DB_HOST\":\"db\",\"DB_PORT\":\"5432\"},\"kind\":\"ConfigMap\",\"metadata\":{\"annotations\":{},\"name\":\"api-config\",\"namespace\":\"shop\"}}\n creationTimestamp: \"2026-11-04T17:26:44Z\"\n name: api-config\n namespace: shop\n resourceVersion: \"303866\"\n uid: 743aaccc-b42d-43fb-aa6f-74cf51ac7b66","more":0},{"t":44.8,"kind":"run","cmd":"kubectl -n shop logs deploy/synthetic --tail=20 --timestamps","out":"2026-11-04T17:28:03.095486352Z 2026-11-04T17:28:03Z GET /orders 503\n2026-11-04T17:28:06.127661188Z 2026-11-04T17:28:06Z GET /orders 503\n2026-11-04T17:28:09.139088653Z 2026-11-04T17:28:09Z GET /orders 503\n2026-11-04T17:28:12.151580808Z 2026-11-04T17:28:12Z GET /orders 503\n2026-11-04T17:28:15.173646272Z 2026-11-04T17:28:15Z GET /orders 503\n2026-11-04T17:28:17.181938229Z 2026-11-04T17:28:17Z GET /orders 200\n2026-11-04T17:28:19.190834776Z 2026-11-04T17:28:19Z GET /orders 200\n2026-11-04T17:28:21.197663246Z 2026-11-04T17:28:21Z GET /orders 200\n2026-11-04T17:28:23.217672545Z 2026-11-04T17:28:23Z GET /orders 200\n2026-11-04T17:28:25.247188260Z 2026-11-04T17:28:25Z GET /orders 200\n2026-11-04T17:28:27.256272078Z 2026-11-04T17:28:27Z GET /orders 200\n2026-11-04T17:28:29.278889725Z 2026-11-04T17:28:29Z GET /orders 200\n2026-11-04T17:28:31.289855677Z 2026-11-04T17:28:31Z GET /orders 200\n2026-11-04T17:28:33.304816589Z 2026-11-04T17:28:33Z GET /orders 200\n2026-11-04T17:28:35.314042968Z 2026-11-04T17:28:35Z GET /orders 200\n2026-11-04T17:28:37.322607935Z 2026-11-04T17:28:37Z GET /orders 200\n2026-11-04T17:28:39.345946605Z 2026-11-04T17:28:39Z GET /orders 200\n2026-11-04T17:28:41.353990580Z 2026-11-04T17:28:41Z GET /orders 200\n2026-11-04T17:28:43.368310431Z 2026-11-04T17:28:43Z GET /orders 200\n2026-11-04T17:28:45.379150328Z 2026-11-04T17:28:45Z GET /orders 200","more":0},{"t":44.8,"kind":"run","cmd":"kubectl -n shop get deployments,pods,endpoints -o wide","out":"Warning: v1 Endpoints is deprecated in v1.33+; use discovery.k8s.io/v1 EndpointSlice\nNAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR\ndeployment.apps/api 2/2 2 2 2m2s api python:3.13-alpine app=api\ndeployment.apps/db 1/1 1 1 2m2s postgres postgres:17-alpine app=db\ndeployment.apps/synthetic 1/1 1 1 2m2s curl curlimages/curl:8.17.0 app=synthetic\ndeployment.apps/web 2/2 2 2 2m2s nginx nginx:1.29-alpine app=web\ndeployment.apps/worker 1/1 1 1 2m2s worker python:3.13-alpine app=worker\n\nNAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES\npod/api-7d87b9fcf5-gxxwb 1/1 Running 0 33s 10.244.0.9 oncall-lab-control-plane \npod/api-7d87b9fcf5-pg6nq 1/1 Running 0 39s 10.244.0.8 oncall-lab-control-plane \npod/db-5c45bf6fd6-nd6m6 1/1 Running 0 2m2s 10.244.0.251 oncall-lab-control-plane \npod/synthetic-5cc5f987df-rjbk2 1/1 Running 0 2m2s 10.244.0.5 oncall-lab-control-plane \npod/web-86cc98785b-gptxl 1/1 Running 0 2m2s 10.244.0.4 oncall-lab-control-plane \npod/web-86cc98785b-vl7mc 1/1 Running 0 2m2s 10.244.0.2 oncall-lab-control-plane \npod/worker-85767c58ff-nzc4h 1/1 Running 0 2m2s 10.244.0.254 oncall-lab-control-plane \n\nNAME ENDPOINTS AGE\nendpoints/api 10.244.0.8:8080,10.244.0.9:8080 2m2s\nendpoints/db 10.244.0.251:5432 2m2s\nendpoints/web 10.244.0.2:80,10.244.0.4:80 2m2s","more":0}],"report":"IMPACT: `/orders` requests returned 503s from 17:27:05 UTC; the last observed failure was at 17:28:15 UTC.\n\nROOT CAUSE: `Deployment/shop/api`, field `spec.template.spec.containers[name=api].env[DB_PORT]`, was set to `5433`. The database service listens on `5432`; API connections to 5433 timed out.\n\nACTIONS TAKEN: Rolled back the API deployment to its previous revision, restoring the ConfigMap-provided port 5432.\n\nSTATUS: **Mitigated.** The rollout completed with 2/2 API replicas ready. The synthetic probe returned 15 consecutive 200s from 17:28:17 through 17:28:45 UTC. Longer-term stability and alert clearance remain unverified.\n\nESCALATION: None.\n\nFOLLOW-UP: Add a deployment check that exercises `/orders` against the configured database port before promoting an API release."}