{"id":"s3-kimi-r1","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/<name>`.\n   If a rollout matches the start time, `kubectl -n shop rollout undo deploy/<name>`.\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":7.6,"kind":"run","cmd":"kubectl -n shop get pods -o wide","out":"NAME                         READY   STATUS    RESTARTS   AGE     IP            NODE                       NOMINATED NODE   READINESS GATES\napi-9fc94df4b-cnf7s          1/1     Running   0          2m40s   10.244.0.59   oncall-lab-control-plane   <none>           <none>\napi-9fc94df4b-zlnn7          1/1     Running   0          2m40s   10.244.0.60   oncall-lab-control-plane   <none>           <none>\ndb-5c45bf6fd6-rgs56          1/1     Running   0          2m59s   10.244.0.52   oncall-lab-control-plane   <none>           <none>\nsynthetic-5cc5f987df-q7f94   1/1     Running   0          2m59s   10.244.0.58   oncall-lab-control-plane   <none>           <none>\nweb-86cc98785b-7pj5w         1/1     Running   0          2m59s   10.244.0.56   oncall-lab-control-plane   <none>           <none>\nweb-86cc98785b-ht4sw         1/1     Running   0          2m59s   10.244.0.57   oncall-lab-control-plane   <none>           <none>\nworker-85767c58ff-hmn5q      1/1     Running   0          2m59s   10.244.0.55   oncall-lab-control-plane   <none>           <none>","more":0},{"t":7.6,"kind":"run","cmd":"kubectl -n shop get deploy,svc,endpoints","out":"Warning: v1 Endpoints is deprecated in v1.33+; use discovery.k8s.io/v1 EndpointSlice\nNAME                        READY   UP-TO-DATE   AVAILABLE   AGE\ndeployment.apps/api         2/2     2            2           2m59s\ndeployment.apps/db          1/1     1            1           2m59s\ndeployment.apps/synthetic   1/1     1            1           2m59s\ndeployment.apps/web         2/2     2            2           2m59s\ndeployment.apps/worker      1/1     1            1           2m59s\n\nNAME          TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE\nservice/api   ClusterIP   10.96.218.50    <none>        8080/TCP   2m59s\nservice/db    ClusterIP   10.96.180.142   <none>        5432/TCP   2m59s\nservice/web   ClusterIP   10.96.33.75     <none>        80/TCP     2m59s\n\nNAME            ENDPOINTS                           AGE\nendpoints/api   10.244.0.59:8080,10.244.0.60:8080   2m59s\nendpoints/db    10.244.0.52:5432                    2m59s\nendpoints/web   10.244.0.56:80,10.244.0.57:80       2m59s","more":0},{"t":7.7,"kind":"run","cmd":"kubectl -n shop logs deploy/synthetic --tail=40","out":"2026-11-03T19:39:51Z GET /orders 000\n2026-11-03T19:39:53Z GET /orders 000\n2026-11-03T19:39:55Z GET /orders 000\n2026-11-03T19:39:57Z GET /orders 200\n2026-11-03T19:39:59Z GET /orders 200\n2026-11-03T19:40:01Z GET /orders 200\n2026-11-03T19:40:03Z GET /orders 200\n2026-11-03T19:40:05Z GET /orders 200\n2026-11-03T19:40:07Z GET /orders 200\n2026-11-03T19:40:09Z GET /orders 200\n2026-11-03T19:41:45Z GET /orders 503\n2026-11-03T19:41:48Z GET /orders 503\n2026-11-03T19:41:51Z GET /orders 503\n2026-11-03T19:41:54Z GET /orders 503\n2026-11-03T19:41:57Z GET /orders 503\n2026-11-03T19:42:00Z GET /orders 503\n2026-11-03T19:42:03Z GET /orders 503\n2026-11-03T19:42:06Z GET /orders 503\n2026-11-03T19:42:09Z GET /orders 503\n2026-11-03T19:42:12Z GET /orders 503\n2026-11-03T19:42:15Z GET /orders 503\n2026-11-03T19:42:18Z GET /orders 503\n2026-11-03T19:42:21Z GET /orders 503\n2026-11-03T19:42:24Z GET /orders 503\n2026-11-03T19:42:27Z GET /orders 503\n2026-11-03T19:42:30Z GET /orders 503\n2026-11-03T19:42:33Z GET /orders 503\n2026-11-03T19:42:36Z GET /orders 503\n2026-11-03T19:42:39Z GET /orders 503\n2026-11-03T19:42:42Z GET /orders 503\n2026-11-03T19:42:45Z GET /orders 503\n2026-11-03T19:42:48Z GET /orders 503","more":0},{"t":19.4,"kind":"run","cmd":"kubectl -n shop logs deploy/web --tail=30","out":"Found 2 pods, using pod/web-86cc98785b-7pj5w\n10.244.0.58 - - [03/Nov/2026:19:40:07 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:40:10 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:41:48 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.58 - - [03/Nov/2026:19:41:51 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:41:53 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.58 - - [03/Nov/2026:19:41:54 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:41:58 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.58 - - [03/Nov/2026:19:42:03 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:42:03 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.58 - - [03/Nov/2026:19:42:06 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:42:08 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.58 - - [03/Nov/2026:19:42:09 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.58 - - [03/Nov/2026:19:42:12 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:42:13 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.58 - - [03/Nov/2026:19:42:15 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:42:18 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:42:23 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.58 - - [03/Nov/2026:19:42:24 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:42:28 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.58 - - [03/Nov/2026:19:42:30 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:42:33 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.58 - - [03/Nov/2026:19:42:33 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:42:38 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:42:43 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.58 - - [03/Nov/2026:19:42:45 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:42:48 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.58 - - [03/Nov/2026:19:42:51 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:42:53 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.58 - - [03/Nov/2026:19:42:57 +0000] \"GET /orders HTTP/1.1\" 503 33 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [03/Nov/2026:19:42:58 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"","more":0},{"t":19.4,"kind":"run","cmd":"kubectl -n shop logs deploy/api --tail=30","out":"Found 2 pods, using pod/api-9fc94df4b-cnf7s\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","more":0},{"t":19.5,"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         <none>\n\n== api ==\ndeployment.apps/api \nREVISION  CHANGE-CAUSE\n1         <none>\n2         release 2026.11.3: connection pool settings\n\n== db ==\ndeployment.apps/db \nREVISION  CHANGE-CAUSE\n1         <none>\n\n== worker ==\ndeployment.apps/worker \nREVISION  CHANGE-CAUSE\n1         <none>","more":0},{"t":41.4,"kind":"run","cmd":"kubectl -n shop get deploy api -o yaml | grep -A30 'containers:' | head -50","out":"      containers:\n      - command:\n        - python\n        - -u\n        - /app/api.py\n        env:\n        - name: DB_PORT\n          value: \"5433\"\n        envFrom:\n        - configMapRef:\n            name: api-config\n        image: python:3.13-alpine\n        imagePullPolicy: IfNotPresent\n        name: api\n        ports:\n        - containerPort: 8080\n          protocol: TCP\n        readinessProbe:\n          failureThreshold: 3\n          httpGet:\n            path: /healthz\n            port: 8080\n            scheme: HTTP\n          periodSeconds: 5\n          successThreshold: 1\n          timeoutSeconds: 1\n        resources:\n          limits:\n            memory: 128Mi\n          requests:\n            cpu: 50m","more":0},{"t":41.5,"kind":"run","cmd":"kubectl -n shop rollout history deploy/api --revision=2; echo ---; kubectl -n shop rollout history deploy/api --revision=1","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<none>\n  Tolerations:\t<none>\n\n---\ndeployment.apps/api with revision #1\nPod Template:\n  Labels:\tapp=api\n\tpod-template-hash=7d87b9fcf5\n  Containers:","more":26},{"t":50.2,"kind":"run","cmd":"kubectl -n shop get configmap api-config -o yaml; kubectl -n shop get svc db -o jsonpath='{.spec.ports}' ; echo","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: \"2026-11-03T19:39:49Z\"\n  name: api-config\n  namespace: shop\n  resourceVersion: \"157846\"\n  uid: 11e94fd3-1659-4e7a-8ad4-aee557d89e43\n[{\"port\":5432,\"protocol\":\"TCP\",\"targetPort\":5432}]","more":0},{"t":60.1,"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":65.4,"kind":"say","text":"Rollback complete. Verifying recovery:"},{"t":80.6,"kind":"run","cmd":"sleep 15; kubectl -n shop logs deploy/synthetic --tail=12; echo ---; kubectl -n shop logs deploy/api --tail=5; echo ---; kubectl -n shop get pods -l app=api","out":"2026-11-03T19:43:36Z GET /orders 503\n2026-11-03T19:43:39Z GET /orders 503\n2026-11-03T19:43:41Z GET /orders 200\n2026-11-03T19:43:43Z GET /orders 200\n2026-11-03T19:43:45Z GET /orders 200\n2026-11-03T19:43:47Z GET /orders 200\n2026-11-03T19:43:49Z GET /orders 200\n2026-11-03T19:43:51Z GET /orders 200\n2026-11-03T19:43:53Z GET /orders 200\n2026-11-03T19:43:55Z GET /orders 200\n2026-11-03T19:43:57Z GET /orders 200\n2026-11-03T19:43:59Z GET /orders 200\n---\nFound 4 pods, using pod/api-9fc94df4b-cnf7s\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-7d87b9fcf5-5msm9   1/1     Running       0          21s\napi-7d87b9fcf5-94whd   1/1     Running       0          23s\napi-9fc94df4b-cnf7s    1/1     Terminating   0          3m53s\napi-9fc94df4b-zlnn7    1/1     Terminating   0          3m53s","more":0},{"t":107.7,"kind":"run","cmd":"kubectl -n shop logs api-7d87b9fcf5-5msm9 --tail=5; echo ---; kubectl -n shop logs api-7d87b9fcf5-94whd --tail=5; echo ---; sleep 20; kubectl -n shop logs deploy/synthetic --tail=6","out":"api listening on 8080, db=db:5432\n---\napi listening on 8080, db=db:5432\n---\n2026-11-03T19:44:17Z GET /orders 200\n2026-11-03T19:44:19Z GET /orders 200\n2026-11-03T19:44:21Z GET /orders 200\n2026-11-03T19:44:23Z GET /orders 200\n2026-11-03T19:44:25Z GET /orders 200\n2026-11-03T19:44:27Z GET /orders 200","more":0}],"report":"Incident resolved. Final report:\n\n---\n\nIMPACT: All customer traffic to `GET /orders` on shop/web failed with 503 (100% error rate) from 2026-11-03T19:41:45Z until 19:43:41Z (~2 minutes), per `synthetic` probe logs.\n\nROOT CAUSE: `Deployment/shop/api` — field `spec.template.spec.containers[0].env[DB_PORT]=\"5433\"`. Rollout revision 2 (\"release 2026.11.3: connection pool settings\") added a `DB_PORT: 5433` env var, which overrides the correct `DB_PORT: \"5432\"` from ConfigMap `api-config` (env beats envFrom). The `db` Service listens on 5432, so every api DB connection to `db:5433` timed out (`ERROR db connect db:5433: timed out` in api logs), and nginx returned 503 for /orders.\n\nACTIONS TAKEN:\n1. Checked `synthetic` logs — failure pattern: solid 503s starting 19:41:45Z.\n2. Checked rollout history — found `deploy/api` revision 2 whose timing matched the failure start; revisions of web/db/worker unchanged.\n3. Checked pods/endpoints/logs — all pods Ready, endpoints correct; api logging `db connect db:5433: timed out`.\n4. Verified ConfigMap `api-config` has `DB_PORT: \"5432\"` and Service `db` exposes 5432, confirming the Deployment env override as the fault.\n5. `kubectl -n shop rollout undo deploy/api` → reverted to revision 1 (no DB_PORT override); waited for rollout to complete.\n\nSTATUS: resolved. New api pods log `api listening on 8080, db=db:5432` with no connect errors, and `synthetic` shows uninterrupted `GET /orders 200` since 19:43:41Z.\n\nESCALATION: none — fix was within runbook authority (rollout undo) and no data was at risk.\n\nFOLLOW-UP: Add a CI/CD validation gate (or admission check) that asserts the api Deployment's effective DB config matches the `db` Service port before rollout, so connection-pool releases can't override ConfigMap values with a bad port."}