{"id":"s3-kimi-r2","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":3.7,"kind":"run","cmd":"kubectl -n shop get pods -o wide","out":"NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES\napi-9fc94df4b-6mq7z 1/1 Running 0 64s 10.244.0.250 oncall-lab-control-plane \napi-9fc94df4b-lzrg2 1/1 Running 0 63s 10.244.0.251 oncall-lab-control-plane \ndb-5c45bf6fd6-grcqw 1/1 Running 0 81s 10.244.0.243 oncall-lab-control-plane \nsynthetic-5cc5f987df-db6cc 1/1 Running 0 81s 10.244.0.249 oncall-lab-control-plane \nweb-86cc98785b-jsdq5 1/1 Running 0 81s 10.244.0.247 oncall-lab-control-plane \nweb-86cc98785b-xr2pj 1/1 Running 0 81s 10.244.0.248 oncall-lab-control-plane \nworker-85767c58ff-zzxrk 1/1 Running 0 81s 10.244.0.246 oncall-lab-control-plane ","more":0},{"t":3.7,"kind":"run","cmd":"kubectl -n shop logs deploy/synthetic --tail=40","out":"2026-11-04T13:29:43Z GET /orders 000\n2026-11-04T13:29:45Z GET /orders 000\n2026-11-04T13:29:47Z GET /orders 000\n2026-11-04T13:29:49Z GET /orders 200\n2026-11-04T13:29:51Z GET /orders 200\n2026-11-04T13:29:53Z GET /orders 200\n2026-11-04T13:29:55Z GET /orders 200\n2026-11-04T13:29:57Z GET /orders 200\n2026-11-04T13:29:59Z GET /orders 200\n2026-11-04T13:30:02Z GET /orders 503\n2026-11-04T13:30:05Z GET /orders 503\n2026-11-04T13:30:08Z GET /orders 503\n2026-11-04T13:30:11Z GET /orders 503\n2026-11-04T13:30:14Z GET /orders 503\n2026-11-04T13:30:17Z GET /orders 503\n2026-11-04T13:30:20Z GET /orders 503\n2026-11-04T13:30:23Z GET /orders 503\n2026-11-04T13:30:26Z GET /orders 503\n2026-11-04T13:30:29Z GET /orders 503\n2026-11-04T13:30:32Z GET /orders 503\n2026-11-04T13:30:35Z GET /orders 503\n2026-11-04T13:30:38Z GET /orders 503\n2026-11-04T13:30:42Z GET /orders 503\n2026-11-04T13:30:45Z GET /orders 503\n2026-11-04T13:30:48Z GET /orders 503\n2026-11-04T13:30:51Z GET /orders 503\n2026-11-04T13:30:54Z GET /orders 503\n2026-11-04T13:30:57Z GET /orders 503\n2026-11-04T13:31:00Z GET /orders 503\n2026-11-04T13:31:03Z GET /orders 503","more":0},{"t":6.7,"kind":"say","text":"The `synthetic` logs show `/orders` returning **503 since 13:30:02Z** (after a brief healthy 200 period). All pods are Running but very young (~60-80s), suggesting a recent change. Per runbook step 2, let me check rollout history."},{"t":6.7,"kind":"run","cmd":"kubectl -n shop get events --sort-by=.lastTimestamp | tail -30","out":"84s Normal SuccessfulCreate replicaset/synthetic-5cc5f987df Created pod: synthetic-5cc5f987df-db6cc\n84s Normal SuccessfulCreate replicaset/db-5c45bf6fd6 Created pod: db-5c45bf6fd6-grcqw\n84s Normal ScalingReplicaSet deployment/db Scaled up replica set db-5c45bf6fd6 from 0 to 1\n84s Normal Scheduled pod/synthetic-5cc5f987df-db6cc Successfully assigned shop/synthetic-5cc5f987df-db6cc to oncall-lab-control-plane\n84s Normal Pulled pod/synthetic-5cc5f987df-db6cc Container image \"curlimages/curl:8.17.0\" already present on machine and can be accessed by the pod\n84s Normal Created pod/synthetic-5cc5f987df-db6cc Container created\n84s Normal Started pod/synthetic-5cc5f987df-db6cc Container started\n83s Warning Unhealthy pod/db-5c45bf6fd6-grcqw Readiness probe failed: /var/run/postgresql:5432 - no response\n83s Warning Unhealthy pod/web-86cc98785b-jsdq5 Readiness probe failed: HTTP probe failed with statuscode: 502\n83s Warning Unhealthy pod/web-86cc98785b-xr2pj Readiness probe failed: HTTP probe failed with statuscode: 502\n67s Normal Pulled pod/api-9fc94df4b-6mq7z Container image \"python:3.13-alpine\" already present on machine and can be accessed by the pod\n67s Warning Unhealthy pod/api-9fc94df4b-6mq7z Readiness probe failed: Get \"http://10.244.0.250:8080/healthz\": dial tcp 10.244.0.250:8080: connect: connection refused\n67s Normal Scheduled pod/api-9fc94df4b-6mq7z Successfully assigned shop/api-9fc94df4b-6mq7z to oncall-lab-control-plane\n67s Normal Created pod/api-9fc94df4b-6mq7z Container created\n67s Normal ScalingReplicaSet deployment/api Scaled up replica set api-9fc94df4b from 0 to 1\n67s Normal Started pod/api-9fc94df4b-6mq7z Container started\n67s Normal SuccessfulCreate replicaset/api-9fc94df4b Created pod: api-9fc94df4b-6mq7z\n66s Normal SuccessfulCreate replicaset/api-9fc94df4b Created pod: api-9fc94df4b-lzrg2\n66s Normal Started pod/api-9fc94df4b-lzrg2 Container started\n66s Normal Created pod/api-9fc94df4b-lzrg2 Container created\n66s Normal Pulled pod/api-9fc94df4b-lzrg2 Container image \"python:3.13-alpine\" already present on machine and can be accessed by the pod\n66s Normal Scheduled pod/api-9fc94df4b-lzrg2 Successfully assigned shop/api-9fc94df4b-lzrg2 to oncall-lab-control-plane\n66s Warning Unhealthy pod/api-9fc94df4b-lzrg2 Readiness probe failed: Get \"http://10.244.0.251:8080/healthz\": dial tcp 10.244.0.251:8080: connect: connection refused\n66s Normal ScalingReplicaSet deployment/api Scaled down replica set api-7d87b9fcf5 from 2 to 1\n66s Normal ScalingReplicaSet deployment/api Scaled up replica set api-9fc94df4b from 1 to 2\n66s Normal SuccessfulDelete replicaset/api-7d87b9fcf5 Deleted pod: api-7d87b9fcf5-tprwg\n66s Normal Killing pod/api-7d87b9fcf5-tprwg Stopping container api\n65s Normal ScalingReplicaSet deployment/api Scaled down replica set api-7d87b9fcf5 from 1 to 0\n65s Normal SuccessfulDelete replicaset/api-7d87b9fcf5 Deleted pod: api-7d87b9fcf5-9wg29\n65s Normal Killing pod/api-7d87b9fcf5-9wg29 Stopping container api","more":0},{"t":6.9,"kind":"run","cmd":"for d in web api db worker; do echo \"=== $d ===\"; kubectl -n shop rollout history deploy/$d; done","out":"=== web ===\ndeployment.apps/web \nREVISION CHANGE-CAUSE\n1 \n\n=== api ===\ndeployment.apps/api \nREVISION CHANGE-CAUSE\n1 \n2 release 2026.11.3: connection pool settings\n\n=== db ===\ndeployment.apps/db \nREVISION CHANGE-CAUSE\n1 \n\n=== worker ===\ndeployment.apps/worker \nREVISION CHANGE-CAUSE\n1 ","more":0},{"t":11.3,"kind":"say","text":"The `api` deployment was rolled out (revision 2, \"release 2026.11.3: connection pool settings\") right when the 503s began. Let me quickly confirm via api logs, then undo per the runbook."},{"t":11.4,"kind":"run","cmd":"kubectl -n shop logs deploy/api --tail=20 --all-containers","out":"Found 2 pods, using pod/api-9fc94df4b-6mq7z\napi listening on 8080, db=db:5433\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out","more":0},{"t":11.4,"kind":"run","cmd":"kubectl -n shop logs deploy/web --tail=10 | tail -5; kubectl -n shop get endpoints web api db","out":"Found 2 pods, using pod/web-86cc98785b-jsdq5\n10.244.0.1 - - [04/Nov/2026:13:30:53 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.249 - - [04/Nov/2026:13:30:54 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [04/Nov/2026:13:30:58 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.1 - - [04/Nov/2026:13:31:03 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.1 - - [04/Nov/2026:13:31:08 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\nWarning: v1 Endpoints is deprecated in v1.33+; use discovery.k8s.io/v1 EndpointSlice\nNAME ENDPOINTS AGE\nweb 10.244.0.247:80,10.244.0.248:80 89s\napi 10.244.0.250:8080,10.244.0.251:8080 89s\ndb 10.244.0.243:5432 89s","more":0},{"t":15.9,"kind":"run","cmd":"kubectl -n shop rollout undo deploy/api && kubectl -n shop rollout status deploy/api --timeout=120s","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\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 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":17.8,"kind":"say","text":"Rollback complete. Now verifying recovery via api logs and synthetic probes."},{"t":17.9,"kind":"run","cmd":"kubectl -n shop logs deploy/api --tail=5; echo ---; kubectl -n shop get pods -l app=api","out":"Found 4 pods, using pod/api-9fc94df4b-6mq7z\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\nERROR db connect db:5433: timed out\n---\nNAME READY STATUS RESTARTS AGE\napi-7d87b9fcf5-6kwhk 1/1 Running 0 4s\napi-7d87b9fcf5-qcx68 1/1 Running 0 3s\napi-9fc94df4b-6mq7z 1/1 Terminating 0 78s\napi-9fc94df4b-lzrg2 1/1 Terminating 0 77s","more":0},{"t":20.1,"kind":"say","text":"New api pods are up; the log output hit a terminating old pod. Let me check the new pods directly and watch the synthetic probe."},{"t":26.3,"kind":"run","cmd":"sleep 6; kubectl -n shop logs api-7d87b9fcf5-6kwhk --tail=3; kubectl -n shop logs api-7d87b9fcf5-qcx68 --tail=3; echo ---; kubectl -n shop logs deploy/synthetic --tail=8","out":"api listening on 8080, db=db:5432\napi listening on 8080, db=db:5432\n---\n2026-11-04T13:31:09Z GET /orders 503\n2026-11-04T13:31:12Z GET /orders 503\n2026-11-04T13:31:15Z GET /orders 503\n2026-11-04T13:31:17Z GET /orders 200\n2026-11-04T13:31:19Z GET /orders 200\n2026-11-04T13:31:21Z GET /orders 200\n2026-11-04T13:31:23Z GET /orders 200\n2026-11-04T13:31:25Z GET /orders 200","more":0},{"t":31.0,"kind":"say","text":"Service recovered. Let me pin down the exact faulty field for the report by comparing the bad ReplicaSet spec with the restored one, and confirm sustained recovery."},{"t":31.2,"kind":"run","cmd":"kubectl -n shop get rs api-9fc94df4b -o jsonpath='{.spec.template.spec.containers[0].env}'; echo; kubectl -n shop get rs api-7d87b9fcf5 -o jsonpath='{.spec.template.spec.containers[0].env}'; echo; kubectl -n shop get deploy api -o jsonpath='{.spec.template.spec.containers[0].env}'; echo","out":"[{\"name\":\"DB_PORT\",\"value\":\"5433\"}]","more":0},{"t":41.1,"kind":"run","cmd":"sleep 10; kubectl -n shop logs deploy/synthetic --tail=6","out":"2026-11-04T13:31:29Z GET /orders 200\n2026-11-04T13:31:31Z GET /orders 200\n2026-11-04T13:31:33Z GET /orders 200\n2026-11-04T13:31:35Z GET /orders 200\n2026-11-04T13:31:37Z GET /orders 200\n2026-11-04T13:31:39Z GET /orders 200","more":0}],"report":"Service is fully recovered. Final report:\n\n---\n\nIMPACT: Customer-facing `GET /orders` on `shop/web` failed with HTTP 503 at a 100% error rate from 2026-11-04T13:30:02Z until 13:31:17Z (~75 seconds). All other probes/pods were healthy.\n\nROOT CAUSE: `Deployment shop/api`, field `spec.template.spec.containers[0].env[DB_PORT]`. Revision 2 (\"release 2026.11.3: connection pool settings\") set `DB_PORT=5433`, but the `db` Service listens on 5432. New api pods could not connect to PostgreSQL (`ERROR db connect db:5433: timed out`), so `/orders` failed and nginx returned 503.\n\nACTIONS TAKEN:\n1. Checked `synthetic` logs: `/orders` 200 until 13:30:02Z, then 503 on every probe (2s interval).\n2. Checked rollout history: `deploy/api` revision 2 rolled out exactly at the failure start time.\n3. Checked api/web logs and endpoints: api dialing `db:5433`; `db` endpoints on `5432` — confirmed the bad rollout as the cause.\n4. Ran `kubectl -n shop rollout undo deploy/api` (restored revision 1, no `DB_PORT` override → default 5432) and waited for `rollout status` to complete.\n5. Verified new api pods log `db=db:5432` and `synthetic` shows continuous 200s since 13:31:17Z.\n\nSTATUS: resolved — `synthetic` probe returning 200 on every 2s probe since 13:31:17Z; both new api pods Ready and connected to db.\n\nESCALATION: none — fixed entirely within runbook authority (rollout undo in `shop` namespace). The owning team should correct the `DB_PORT` value in release 2026.11.3 before re-attempting it.\n\nFOLLOW-UP: Add a pre-deploy/CI check for api releases that validates configured `DB_PORT` against the `db` Service port (5432) — e.g., a smoke test that the api can open a db connection before the rollout is promoted — so a bad port never reaches production."}