{"id":"s4-gpt-6-luna-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/<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":4.6,"kind":"say","text":"I’ll trace the probe failures and recent changes first, then make only a runbook-authorized change if the evidence identifies one."},{"t":4.7,"kind":"run","cmd":"kubectl -n shop get events --sort-by=.lastTimestamp","out":"LAST SEEN   TYPE      REASON              OBJECT                            MESSAGE\n82s         Normal    Created             pod/synthetic-5cc5f987df-5265q    Container created\n82s         Normal    ScalingReplicaSet   deployment/api                    Scaled up replica set api-7d87b9fcf5 from 0 to 2\n82s         Normal    Created             pod/api-7d87b9fcf5-8cx47          Container created\n82s         Normal    Started             pod/api-7d87b9fcf5-8cx47          Container started\n82s         Warning   Unhealthy           pod/api-7d87b9fcf5-8cx47          Readiness probe failed: Get \"http://10.244.0.113:8080/healthz\": dial tcp 10.244.0.113:8080: connect: connection refused\n82s         Normal    Scheduled           pod/api-7d87b9fcf5-sssvq          Successfully assigned shop/api-7d87b9fcf5-sssvq to oncall-lab-control-plane\n82s         Normal    Pulled              pod/api-7d87b9fcf5-sssvq          Container image \"python:3.13-alpine\" already present on machine and can be accessed by the pod\n82s         Normal    Created             pod/api-7d87b9fcf5-sssvq          Container created\n82s         Normal    Started             pod/api-7d87b9fcf5-sssvq          Container started\n82s         Warning   Unhealthy           pod/api-7d87b9fcf5-sssvq          Readiness probe failed: Get \"http://10.244.0.114:8080/healthz\": dial tcp 10.244.0.114:8080: connect: connection refused\n82s         Normal    SuccessfulCreate    replicaset/api-7d87b9fcf5         Created pod: api-7d87b9fcf5-8cx47\n82s         Normal    SuccessfulCreate    replicaset/api-7d87b9fcf5         Created pod: api-7d87b9fcf5-sssvq\n82s         Normal    Started             pod/synthetic-5cc5f987df-5265q    Container started\n82s         Normal    Scheduled           pod/db-5c45bf6fd6-lb6dk           Successfully assigned shop/db-5c45bf6fd6-lb6dk to oncall-lab-control-plane\n82s         Normal    Pulled              pod/db-5c45bf6fd6-lb6dk           Container image \"postgres:17-alpine\" already present on machine and can be accessed by the pod\n82s         Normal    Created             pod/db-5c45bf6fd6-lb6dk           Container created\n82s         Normal    Started             pod/db-5c45bf6fd6-lb6dk           Container started\n82s         Warning   Unhealthy           pod/db-5c45bf6fd6-lb6dk           Readiness probe failed: /var/run/postgresql:5432 - no response\n82s         Normal    SuccessfulCreate    replicaset/db-5c45bf6fd6          Created pod: db-5c45bf6fd6-lb6dk\n82s         Normal    ScalingReplicaSet   deployment/db                     Scaled up replica set db-5c45bf6fd6 from 0 to 1\n82s         Normal    Scheduled           pod/synthetic-5cc5f987df-5265q    Successfully assigned shop/synthetic-5cc5f987df-5265q to oncall-lab-control-plane\n82s         Normal    Pulled              pod/synthetic-5cc5f987df-5265q    Container image \"curlimages/curl:8.17.0\" already present on machine and can be accessed by the pod\n82s         Normal    Pulled              pod/api-7d87b9fcf5-8cx47          Container image \"python:3.13-alpine\" already present on machine and can be accessed by the pod\n82s         Normal    Scheduled           pod/api-7d87b9fcf5-8cx47          Successfully assigned shop/api-7d87b9fcf5-8cx47 to oncall-lab-control-plane\n82s         Normal    ScalingReplicaSet   deployment/worker                 Scaled up replica set worker-85767c58ff from 0 to 1\n82s         Normal    ScalingReplicaSet   deployment/synthetic              Scaled up replica set synthetic-5cc5f987df from 0 to 1\n82s         Normal    Scheduled           pod/web-86cc98785b-t4mkk          Successfully assigned shop/web-86cc98785b-t4mkk to oncall-lab-control-plane\n82s         Normal    Pulled              pod/web-86cc98785b-t4mkk          Container image \"nginx:1.29-alpine\" already present on machine and can be accessed by the pod\n82s         Normal    Created             pod/web-86cc98785b-t4mkk          Container created\n82s         Normal    Started             pod/web-86cc98785b-t4mkk          Con","more":8},{"t":4.7,"kind":"run","cmd":"kubectl -n shop get deploy -o name","out":"deployment.apps/api\ndeployment.apps/db\ndeployment.apps/synthetic\ndeployment.apps/web\ndeployment.apps/worker","more":0},{"t":4.7,"kind":"run","cmd":"kubectl -n shop logs deploy/synthetic --since=30m --all-pods=true","out":"[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:02Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:04Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:06Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:09Z GET /orders 200\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:11Z GET /orders 200\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:13Z GET /orders 200\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:15Z GET /orders 200\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:17Z GET /orders 200\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:19Z GET /orders 502\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:21Z GET /orders 502\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:23Z GET /orders 502\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:25Z GET /orders 502\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:27Z GET /orders 502\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:29Z GET /orders 502\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:31Z GET /orders 502\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:33Z GET /orders 502\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:35Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:37Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:39Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:41Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:43Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:45Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:47Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:49Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:51Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:53Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:55Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:57Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:27:59Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:28:01Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:28:03Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:28:05Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:28:07Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:28:09Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:28:11Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:28:13Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:28:15Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:28:17Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:28:19Z GET /orders 000\n[pod/synthetic-5cc5f987df-5265q/curl] 2026-11-04T16:28:21Z GET /orders 000","more":0},{"t":4.7,"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           82s   api          python:3.13-alpine       app=api\ndeployment.apps/db          1/1     1            1           82s   postgres     postgres:17-alpine       app=db\ndeployment.apps/synthetic   1/1     1            1           82s   curl         curlimages/curl:8.17.0   app=synthetic\ndeployment.apps/web         0/2     2            0           82s   nginx        nginx:1.29-alpine        app=web\ndeployment.apps/worker      1/1     1            1           82s   worker       python:3.13-alpine       app=worker\n\nNAME                                   DESIRED   CURRENT   READY   AGE   CONTAINERS   IMAGES                   SELECTOR\nreplicaset.apps/api-7d87b9fcf5         2         2         2       82s   api          python:3.13-alpine       app=api,pod-template-hash=7d87b9fcf5\nreplicaset.apps/db-5c45bf6fd6          1         1         1       82s   postgres     postgres:17-alpine       app=db,pod-template-hash=5c45bf6fd6\nreplicaset.apps/synthetic-5cc5f987df   1         1         1       82s   curl         curlimages/curl:8.17.0   app=synthetic,pod-template-hash=5cc5f987df\nreplicaset.apps/web-86cc98785b         2         2         0       82s   nginx        nginx:1.29-alpine        app=web,pod-template-hash=86cc98785b\nreplicaset.apps/worker-85767c58ff      1         1         1       82s   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-7d87b9fcf5-8cx47         1/1     Running   0          82s   10.244.0.113   oncall-lab-control-plane   <none>           <none>\npod/api-7d87b9fcf5-sssvq         1/1     Running   0          82s   10.244.0.114   oncall-lab-control-plane   <none>           <none>\npod/db-5c45bf6fd6-lb6dk          1/1     Running   0          82s   10.244.0.112   oncall-lab-control-plane   <none>           <none>\npod/synthetic-5cc5f987df-5265q   1/1     Running   0          82s   10.244.0.118   oncall-lab-control-plane   <none>           <none>\npod/web-86cc98785b-t4mkk         0/1     Running   0          82s   10.244.0.117   oncall-lab-control-plane   <none>           <none>\npod/web-86cc98785b-wlpvc         0/1     Running   0          82s   10.244.0.116   oncall-lab-control-plane   <none>           <none>\npod/worker-85767c58ff-hssxt      1/1     Running   0          82s   10.244.0.115   oncall-lab-control-plane   <none>           <none>\n\nNAME          TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE   SELECTOR\nservice/api   ClusterIP   10.96.138.170   <none>        8080/TCP   82s   app=api\nservice/db    ClusterIP   10.96.76.68     <none>        5432/TCP   82s   app=db\nservice/web   ClusterIP   10.96.213.65    <none>        80/TCP     82s   app=web\n\nNAME            ENDPOINTS                             AGE\nendpoints/api   10.244.0.113:8081,10.244.0.114:8081   82s\nendpoints/db    10.244.0.112:5432                     82s\nendpoints/web                                         82s","more":0},{"t":8.7,"kind":"run","cmd":"kubectl -n shop rollout history deploy/api","out":"deployment.apps/api \nREVISION  CHANGE-CAUSE\n1         <none>","more":0},{"t":8.7,"kind":"run","cmd":"kubectl -n shop describe pod -l app=api","out":"Name:             api-7d87b9fcf5-8cx47\nNamespace:        shop\nPriority:         0\nService Account:  default\nNode:             oncall-lab-control-plane/172.22.0.2\nStart Time:       Wed, 04 Nov 2026 16:27:01 +0000\nLabels:           app=api\n                  pod-template-hash=7d87b9fcf5\nAnnotations:      <none>\nStatus:           Running\nIP:               10.244.0.113\nIPs:\n  IP:           10.244.0.113\nControlled By:  ReplicaSet/api-7d87b9fcf5\nContainers:\n  api:\n    Container ID:  containerd://98a1aa48d4e9e2b78fbc8ff8a1e404cacc9dd4eaac7b8cfeff0690f8090f3098\n    Image:         python:3.13-alpine\n    Image ID:      docker.io/library/python@sha256:7984cf56ceaddebe4fefeb75d64000b9f45d8b77b11a09b24524da6cdc3af0c8\n    Port:          8080/TCP\n    Host Port:     0/TCP\n    Command:\n      python\n      -u\n      /app/api.py\n    State:          Running\n      Started:      Wed, 04 Nov 2026 16:27:01 +0000\n    Ready:          True\n    Restart Count:  0\n    Limits:\n      memory:  128Mi\n    Requests:\n      cpu:      50m\n      memory:   64Mi\n    Readiness:  http-get http://:8080/healthz delay=0s timeout=1s period=5s successThreshold=1 failureThreshold=3\n    Environment Variables from:\n      api-config  ConfigMap  Optional: false\n    Environment:  <none>\n    Mounts:\n      /app from code (rw)","more":88},{"t":8.7,"kind":"run","cmd":"kubectl -n shop rollout history deploy/web","out":"deployment.apps/web \nREVISION  CHANGE-CAUSE\n1         <none>","more":0},{"t":8.7,"kind":"run","cmd":"kubectl -n shop describe pod -l app=web","out":"Name:             web-86cc98785b-t4mkk\nNamespace:        shop\nPriority:         0\nService Account:  default\nNode:             oncall-lab-control-plane/172.22.0.2\nStart Time:       Wed, 04 Nov 2026 16:27:01 +0000\nLabels:           app=web\n                  pod-template-hash=86cc98785b\nAnnotations:      <none>\nStatus:           Running\nIP:               10.244.0.117\nIPs:\n  IP:           10.244.0.117\nControlled By:  ReplicaSet/web-86cc98785b\nContainers:\n  nginx:\n    Container ID:   containerd://61bcf0ef2c6965905b5c84de018ca183b587d044ef2071e8f1340712eea136f3\n    Image:          nginx:1.29-alpine\n    Image ID:       docker.io/library/nginx@sha256:5616878291a2eed594aee8db4dade5878cf7edcb475e59193904b198d9b830de\n    Port:           80/TCP\n    Host Port:      0/TCP\n    State:          Running\n      Started:      Wed, 04 Nov 2026 16:27:01 +0000\n    Ready:          False\n    Restart Count:  0\n    Readiness:      http-get http://:80/healthz delay=0s timeout=1s period=5s successThreshold=1 failureThreshold=3\n    Environment:    <none>\n    Mounts:\n      /etc/nginx/conf.d from conf (rw)\n      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-2ld6z (ro)\nConditions:\n  Type                        Status\n  PodReadyToStartContainers   True \n  Initialized                 True \n  Ready                       False \n  ContainersReady             False \n  PodScheduled                True \nVolumes:\n  conf:\n    Type:      ConfigMap (a volume populated by a ConfigMap)","more":66},{"t":8.7,"kind":"run","cmd":"kubectl -n shop logs deploy/web --all-pods=true --since=10m","out":"[pod/web-86cc98785b-t4mkk/nginx] /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration\n[pod/web-86cc98785b-t4mkk/nginx] /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/\n[pod/web-86cc98785b-t4mkk/nginx] /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh\n[pod/web-86cc98785b-t4mkk/nginx] 10-listen-on-ipv6-by-default.sh: info: can not modify /etc/nginx/conf.d/default.conf (read-only file system?)\n[pod/web-86cc98785b-t4mkk/nginx] /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh\n[pod/web-86cc98785b-t4mkk/nginx] /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh\n[pod/web-86cc98785b-t4mkk/nginx] /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh\n[pod/web-86cc98785b-t4mkk/nginx] /docker-entrypoint.sh: Configuration complete; ready for start up\n[pod/web-86cc98785b-t4mkk/nginx] 2026/11/04 16:27:01 [notice] 1#1: using the \"epoll\" event method\n[pod/web-86cc98785b-t4mkk/nginx] 2026/11/04 16:27:01 [notice] 1#1: nginx/1.29.8\n[pod/web-86cc98785b-t4mkk/nginx] 2026/11/04 16:27:01 [notice] 1#1: built by gcc 15.2.0 (Alpine 15.2.0) \n[pod/web-86cc98785b-t4mkk/nginx] 2026/11/04 16:27:01 [notice] 1#1: OS: Linux 6.8.0-117-generic\n[pod/web-86cc98785b-t4mkk/nginx] 2026/11/04 16:27:01 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1073741816:1073741816\n[pod/web-86cc98785b-t4mkk/nginx] 2026/11/04 16:27:01 [notice] 1#1: start worker processes\n[pod/web-86cc98785b-t4mkk/nginx] 2026/11/04 16:27:01 [notice] 1#1: start worker process 27\n[pod/web-86cc98785b-t4mkk/nginx] 2026/11/04 16:27:01 [notice] 1#1: start worker process 28\n[pod/web-86cc98785b-t4mkk/nginx] 2026/11/04 16:27:01 [notice] 1#1: start worker process 29\n[pod/web-86cc98785b-t4mkk/nginx] 2026/11/04 16:27:01 [notice] 1#1: start worker process 30\n[pod/web-86cc98785b-t4mkk/nginx] 2026/11/04 16:27:01 [notice] 1#1: start worker process 31\n[pod/web-86cc98785b-t4mkk/nginx] 2026/11/04 16:27:01 [notice] 1#1: start worker process 32\n[pod/web-86cc98785b-t4mkk/nginx] 2026/11/04 16:27:01 [notice] 1#1: start worker process 33\n[pod/web-86cc98785b-t4mkk/nginx] 2026/11/04 16:27:01 [notice] 1#1: start worker process 34\n[pod/web-86cc98785b-t4mkk/nginx] 2026/11/04 16:27:02 [error] 28#28: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.138.170:8080/healthz\", host: \"10.244.0.117:80\"\n[pod/web-86cc98785b-t4mkk/nginx] 10.244.0.1 - - [04/Nov/2026:16:27:02 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-t4mkk/nginx] 10.244.0.1 - - [04/Nov/2026:16:27:07 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-t4mkk/nginx] 10.244.0.118 - - [04/Nov/2026:16:27:09 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-t4mkk/nginx] 10.244.0.118 - - [04/Nov/2026:16:27:11 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-t4mkk/nginx] 10.244.0.1 - - [04/Nov/2026:16:27:12 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-t4mkk/nginx] 10.244.0.118 - - [04/Nov/2026:16:27:13 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-t4mkk/nginx] 10.244.0.118 - - [04/Nov/2026:16:27:14 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-t4mkk/nginx] 10.244.0.118 - - [04/Nov/2026:16:27:15 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-t4mkk/nginx] 10.244.0.118 - - [04/Nov/2026:16:27:17 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785b-t4mkk/nginx] 10.244.0.1 - - [04/Nov/2026:16:27:17 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-t4mkk/nginx] 10.244.0.118 - - [04/Nov/2026:16:27:18 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-86cc98785","more":105},{"t":8.8,"kind":"run","cmd":"kubectl -n shop logs deploy/api --all-pods=true --since=10m","out":"[pod/api-7d87b9fcf5-8cx47/api] api listening on 8080, db=db:5432\n[pod/api-7d87b9fcf5-sssvq/api] api listening on 8080, db=db:5432","more":0},{"t":14.6,"kind":"run","cmd":"kubectl -n shop get deploy api -o yaml","out":"apiVersion: apps/v1\nkind: Deployment\nmetadata:\n  annotations:\n    deployment.kubernetes.io/revision: \"1\"\n    kubectl.kubernetes.io/last-applied-configuration: |\n      {\"apiVersion\":\"apps/v1\",\"kind\":\"Deployment\",\"metadata\":{\"annotations\":{},\"labels\":{\"app\":\"api\"},\"name\":\"api\",\"namespace\":\"shop\"},\"spec\":{\"replicas\":2,\"selector\":{\"matchLabels\":{\"app\":\"api\"}},\"template\":{\"metadata\":{\"labels\":{\"app\":\"api\"}},\"spec\":{\"containers\":[{\"command\":[\"python\",\"-u\",\"/app/api.py\"],\"envFrom\":[{\"configMapRef\":{\"name\":\"api-config\"}}],\"image\":\"python:3.13-alpine\",\"name\":\"api\",\"ports\":[{\"containerPort\":8080}],\"readinessProbe\":{\"httpGet\":{\"path\":\"/healthz\",\"port\":8080},\"periodSeconds\":5},\"resources\":{\"limits\":{\"memory\":\"128Mi\"},\"requests\":{\"cpu\":\"50m\",\"memory\":\"64Mi\"}},\"volumeMounts\":[{\"mountPath\":\"/app\",\"name\":\"code\"}]}],\"volumes\":[{\"configMap\":{\"name\":\"api-code\"},\"name\":\"code\"}]}}}}\n  creationTimestamp: \"2026-11-04T16:27:01Z\"\n  generation: 1\n  labels:\n    app: api\n  name: api\n  namespace: shop\n  resourceVersion: \"292042\"\n  uid: 3f3d5f36-4fc5-4df0-95a8-b4643c4c808c\nspec:\n  progressDeadlineSeconds: 600\n  replicas: 2\n  revisionHistoryLimit: 10\n  selector:\n    matchLabels:\n      app: api\n  strategy:\n    rollingUpdate:\n      maxSurge: 25%\n      maxUnavailable: 25%\n    type: RollingUpdate\n  template:\n    metadata:\n      labels:\n        app: api\n    spec:\n      containers:\n      - command:\n        - python\n        - -u\n        - /app/api.py\n        envFrom:\n        - configMapRef:\n            name: api-config","more":56},{"t":14.6,"kind":"run","cmd":"kubectl -n shop get svc api -o yaml","out":"apiVersion: v1\nkind: Service\nmetadata:\n  annotations:\n    kubectl.kubernetes.io/last-applied-configuration: |\n      {\"apiVersion\":\"v1\",\"kind\":\"Service\",\"metadata\":{\"annotations\":{},\"name\":\"api\",\"namespace\":\"shop\"},\"spec\":{\"ports\":[{\"port\":8080}],\"selector\":{\"app\":\"api\"}}}\n  creationTimestamp: \"2026-11-04T16:27:01Z\"\n  name: api\n  namespace: shop\n  resourceVersion: \"292080\"\n  uid: 394db7ef-8645-4fe4-b964-48052af270e1\nspec:\n  clusterIP: 10.96.138.170\n  clusterIPs:\n  - 10.96.138.170\n  internalTrafficPolicy: Cluster\n  ipFamilies:\n  - IPv4\n  ipFamilyPolicy: SingleStack\n  ports:\n  - port: 8080\n    protocol: TCP\n    targetPort: 8081\n  selector:\n    app: api\n  sessionAffinity: None\n  type: ClusterIP\nstatus:\n  loadBalancer: {}","more":0},{"t":14.6,"kind":"run","cmd":"kubectl -n shop get configmap api-config api-code web-nginx -o yaml","out":"apiVersion: v1\nitems:\n- apiVersion: v1\n  data:\n    DB_HOST: db\n    DB_PORT: \"5432\"\n  kind: ConfigMap\n  metadata:\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: \"2026-11-04T16:27:01Z\"\n    name: api-config\n    namespace: shop\n    resourceVersion: \"291887\"\n    uid: 998d506d-41a1-46d3-9771-9c8a8fa10bc1\n- apiVersion: v1\n  data:\n    api.py: |\n      import os, socket, sys, json, time\n      from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n      host = os.environ.get(\"DB_HOST\")\n      port = int(os.environ.get(\"DB_PORT\", \"5432\"))\n      if not host:\n          print(\"FATAL: DB_HOST is not set; check ConfigMap api-config\", flush=True)\n          sys.exit(1)\n      def db_ok():\n          try:\n              with socket.create_connection((host, port), timeout=1.0):\n                  return True\n          except OSError as e:\n              print(f\"ERROR db connect {host}:{port}: {e}\", flush=True)\n              return False\n      class H(BaseHTTPRequestHandler):\n          def log_message(self, *a): pass\n          def send(self, code, body):\n              b = json.dumps(body).encode()\n              self.send_response(code); self.send_header(\"Content-Type\", \"application/json\")\n              self.send_header(\"Content-Length\", str(len(b))); self.end_headers(); self.wfile.write(b)\n          def do_GET(self):","more":55},{"t":14.6,"kind":"run","cmd":"kubectl -n shop logs deploy/db --since=10m","out":"The files belonging to this database system will be owned by user \"postgres\".\nThis user must also own the server process.\n\nThe database cluster will be initialized with locale \"en_US.utf8\".\nThe default database encoding has accordingly been set to \"UTF8\".\nThe default text search configuration will be set to \"english\".\n\nData page checksums are disabled.\n\nfixing permissions on existing directory /var/lib/postgresql/data/pgdata ... ok\ncreating subdirectories ... ok\nselecting dynamic shared memory implementation ... posix\nselecting default \"max_connections\" ... 100\nselecting default \"shared_buffers\" ... 128MB\nselecting default time zone ... UTC\ncreating configuration files ... ok\nrunning bootstrap script ... ok\nsh: locale: not found\n2026-11-04 16:27:02.022 UTC [49] WARNING:  no usable system locales were found\nperforming post-bootstrap initialization ... ok\nsyncing data to disk ... ok\n\n\ninitdb: warning: enabling \"trust\" authentication for local connections\ninitdb: 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.\nSuccess. You can now start the database server using:\n\n    pg_ctl -D /var/lib/postgresql/data/pgdata -l logfile start\n\nwaiting for server to start....2026-11-04 16:27:02.194 UTC [55] LOG:  starting PostgreSQL 17.11 on aarch64-unknown-linux-musl, compiled by gcc (Alpine 15.2.0) 15.2.0, 64-bit\n2026-11-04 16:27:02.195 UTC [55] LOG:  listening on Unix socket \"/var/run/postgresql/.s.PGSQL.5432\"\n2026-11-04 16:27:02.196 UTC [58] LOG:  database system was shut down at 2026-11-04 16:27:02 UTC\n2026-11-04 16:27:02.198 UTC [55] LOG:  database system is ready to accept connections\n done\nserver started\n\n/usr/local/bin/docker-entrypoint.sh: ignoring /docker-entrypoint-initdb.d/*\n\nwaiting for server to shut down....2026-11-04 16:27:02.290 UTC [55] LOG:  received fast shutdown request\n2026-11-04 16:27:02.290 UTC [55] LOG:  aborting any active transactions","more":16},{"t":14.6,"kind":"run","cmd":"kubectl -n shop logs deploy/synthetic --since=3m","out":"2026-11-04T16:27:02Z GET /orders 000\n2026-11-04T16:27:04Z GET /orders 000\n2026-11-04T16:27:06Z GET /orders 000\n2026-11-04T16:27:09Z GET /orders 200\n2026-11-04T16:27:11Z GET /orders 200\n2026-11-04T16:27:13Z GET /orders 200\n2026-11-04T16:27:15Z GET /orders 200\n2026-11-04T16:27:17Z GET /orders 200\n2026-11-04T16:27:19Z GET /orders 502\n2026-11-04T16:27:21Z GET /orders 502\n2026-11-04T16:27:23Z GET /orders 502\n2026-11-04T16:27:25Z GET /orders 502\n2026-11-04T16:27:27Z GET /orders 502\n2026-11-04T16:27:29Z GET /orders 502\n2026-11-04T16:27:31Z GET /orders 502\n2026-11-04T16:27:33Z GET /orders 502\n2026-11-04T16:27:35Z GET /orders 000\n2026-11-04T16:27:37Z GET /orders 000\n2026-11-04T16:27:39Z GET /orders 000\n2026-11-04T16:27:41Z GET /orders 000\n2026-11-04T16:27:43Z GET /orders 000\n2026-11-04T16:27:45Z GET /orders 000\n2026-11-04T16:27:47Z GET /orders 000\n2026-11-04T16:27:49Z GET /orders 000\n2026-11-04T16:27:51Z GET /orders 000\n2026-11-04T16:27:53Z GET /orders 000\n2026-11-04T16:27:55Z GET /orders 000\n2026-11-04T16:27:57Z GET /orders 000\n2026-11-04T16:27:59Z GET /orders 000\n2026-11-04T16:28:01Z GET /orders 000\n2026-11-04T16:28:03Z GET /orders 000\n2026-11-04T16:28:05Z GET /orders 000\n2026-11-04T16:28:07Z GET /orders 000\n2026-11-04T16:28:09Z GET /orders 000\n2026-11-04T16:28:11Z GET /orders 000\n2026-11-04T16:28:13Z GET /orders 000\n2026-11-04T16:28:15Z GET /orders 000\n2026-11-04T16:28:17Z GET /orders 000\n2026-11-04T16:28:19Z GET /orders 000\n2026-11-04T16:28:21Z GET /orders 000","more":5},{"t":20.4,"kind":"say","text":"The API pods and database are healthy, but `shop/api` is routing service traffic to port 8081 while the API listens on 8080. That explains nginx’s connection refusals and 502s; no rollout matches the incident, so I’m correcting the service target port rather than restarting deployments."},{"t":20.5,"kind":"run","cmd":"kubectl -n shop patch svc api --type=json -p='[{\"op\":\"replace\",\"path\":\"/spec/ports/0/targetPort\",\"value\":8080}]'","out":"service/api patched","more":0},{"t":26.1,"kind":"run","cmd":"kubectl -n shop get deploy web,api -o wide","out":"Error from server (NotFound): deployments.apps \"web,api\" not found","more":0},{"t":26.1,"kind":"run","cmd":"kubectl -n shop get svc api,endpoints api,web -o wide","out":"Error from server (NotFound): services \"api,endpoints\" not found\nError from server (NotFound): services \"api,web\" not found","more":0},{"t":26.1,"kind":"run","cmd":"kubectl -n shop logs deploy/synthetic --since=1m","out":"2026-11-04T16:27:45Z GET /orders 000\n2026-11-04T16:27:47Z GET /orders 000\n2026-11-04T16:27:49Z GET /orders 000\n2026-11-04T16:27:51Z GET /orders 000\n2026-11-04T16:27:53Z GET /orders 000\n2026-11-04T16:27:55Z GET /orders 000\n2026-11-04T16:27:57Z GET /orders 000\n2026-11-04T16:27:59Z GET /orders 000\n2026-11-04T16:28:01Z GET /orders 000\n2026-11-04T16:28:03Z GET /orders 000\n2026-11-04T16:28:05Z GET /orders 000\n2026-11-04T16:28:07Z GET /orders 000\n2026-11-04T16:28:09Z GET /orders 000\n2026-11-04T16:28:11Z GET /orders 000\n2026-11-04T16:28:13Z GET /orders 000\n2026-11-04T16:28:15Z GET /orders 000\n2026-11-04T16:28:17Z GET /orders 000\n2026-11-04T16:28:19Z GET /orders 000\n2026-11-04T16:28:21Z GET /orders 000\n2026-11-04T16:28:23Z GET /orders 000\n2026-11-04T16:28:25Z GET /orders 000\n2026-11-04T16:28:27Z GET /orders 000\n2026-11-04T16:28:29Z GET /orders 000\n2026-11-04T16:28:31Z GET /orders 000\n2026-11-04T16:28:33Z GET /orders 000\n2026-11-04T16:28:35Z GET /orders 000\n2026-11-04T16:28:37Z GET /orders 000\n2026-11-04T16:28:39Z GET /orders 000\n2026-11-04T16:28:41Z GET /orders 200\n2026-11-04T16:28:43Z GET /orders 200","more":0},{"t":26.1,"kind":"run","cmd":"kubectl -n shop logs deploy/web --all-pods=true --since=1m","out":"[pod/web-86cc98785b-wlpvc/nginx] 10.244.0.1 - - [04/Nov/2026:16:27:47 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-wlpvc/nginx] 2026/11/04 16:27:47 [error] 29#29: *49 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.138.170:8080/healthz\", host: \"10.244.0.116:80\"\n[pod/web-86cc98785b-wlpvc/nginx] 10.244.0.1 - - [04/Nov/2026:16:27:52 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-wlpvc/nginx] 2026/11/04 16:27:52 [error] 29#29: *51 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.138.170:8080/healthz\", host: \"10.244.0.116:80\"\n[pod/web-86cc98785b-wlpvc/nginx] 10.244.0.1 - - [04/Nov/2026:16:27:57 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-wlpvc/nginx] 2026/11/04 16:27:57 [error] 29#29: *53 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.138.170:8080/healthz\", host: \"10.244.0.116:80\"\n[pod/web-86cc98785b-wlpvc/nginx] 2026/11/04 16:28:02 [error] 29#29: *55 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.138.170:8080/healthz\", host: \"10.244.0.116:80\"\n[pod/web-86cc98785b-wlpvc/nginx] 10.244.0.1 - - [04/Nov/2026:16:28:02 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-wlpvc/nginx] 2026/11/04 16:28:07 [error] 29#29: *57 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.138.170:8080/healthz\", host: \"10.244.0.116:80\"\n[pod/web-86cc98785b-wlpvc/nginx] 10.244.0.1 - - [04/Nov/2026:16:28:07 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-wlpvc/nginx] 10.244.0.1 - - [04/Nov/2026:16:28:12 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-wlpvc/nginx] 2026/11/04 16:28:12 [error] 29#29: *59 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.138.170:8080/healthz\", host: \"10.244.0.116:80\"\n[pod/web-86cc98785b-wlpvc/nginx] 2026/11/04 16:28:17 [error] 29#29: *61 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.138.170:8080/healthz\", host: \"10.244.0.116:80\"\n[pod/web-86cc98785b-wlpvc/nginx] 10.244.0.1 - - [04/Nov/2026:16:28:17 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-wlpvc/nginx] 2026/11/04 16:28:22 [error] 29#29: *63 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.138.170:8080/healthz\", host: \"10.244.0.116:80\"\n[pod/web-86cc98785b-wlpvc/nginx] 10.244.0.1 - - [04/Nov/2026:16:28:22 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-wlpvc/nginx] 2026/11/04 16:28:27 [error] 29#29: *65 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.138.170:8080/healthz\", host: \"10.244.0.116:80\"\n[pod/web-86cc98785b-wlpvc/nginx] 10.244.0.1 - - [04/Nov/2026:16:28:27 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-wlpvc/nginx] 10.244.0.1 - - [04/Nov/2026:16:28:32 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-86cc98785b-wlpvc/nginx] 2026/11/04 16:28:32 [error] 29#29: *67 connect() failed (111: Connection refused) while connectin","more":8},{"t":31.6,"kind":"run","cmd":"kubectl -n shop get pods -l app=web -o wide","out":"NAME                   READY   STATUS    RESTARTS   AGE    IP             NODE                       NOMINATED NODE   READINESS GATES\nweb-86cc98785b-t4mkk   1/1     Running   0          109s   10.244.0.117   oncall-lab-control-plane   <none>           <none>\nweb-86cc98785b-wlpvc   1/1     Running   0          109s   10.244.0.116   oncall-lab-control-plane   <none>           <none>","more":0},{"t":31.6,"kind":"run","cmd":"kubectl -n shop logs deploy/synthetic --since=30s","out":"2026-11-04T16:28:21Z GET /orders 000\n2026-11-04T16:28:23Z GET /orders 000\n2026-11-04T16:28:25Z GET /orders 000\n2026-11-04T16:28:27Z GET /orders 000\n2026-11-04T16:28:29Z GET /orders 000\n2026-11-04T16:28:31Z GET /orders 000\n2026-11-04T16:28:33Z GET /orders 000\n2026-11-04T16:28:35Z GET /orders 000\n2026-11-04T16:28:37Z GET /orders 000\n2026-11-04T16:28:39Z GET /orders 000\n2026-11-04T16:28:41Z GET /orders 200\n2026-11-04T16:28:43Z GET /orders 200\n2026-11-04T16:28:45Z GET /orders 200\n2026-11-04T16:28:47Z GET /orders 200\n2026-11-04T16:28:49Z GET /orders 200","more":0},{"t":31.6,"kind":"run","cmd":"kubectl -n shop get svc/api endpoints/api endpoints/web deploy/web deploy/api -o wide","out":"Warning: v1 Endpoints is deprecated in v1.33+; use discovery.k8s.io/v1 EndpointSlice\nNAME          TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE    SELECTOR\nservice/api   ClusterIP   10.96.138.170   <none>        8080/TCP   109s   app=api\n\nNAME            ENDPOINTS                             AGE\nendpoints/api   10.244.0.113:8080,10.244.0.114:8080   109s\nendpoints/web   10.244.0.116:80,10.244.0.117:80       109s\n\nNAME                  READY   UP-TO-DATE   AVAILABLE   AGE    CONTAINERS   IMAGES               SELECTOR\ndeployment.apps/web   2/2     2            2           109s   nginx        nginx:1.29-alpine    app=web\ndeployment.apps/api   2/2     2            2           109s   api          python:3.13-alpine   app=api","more":0}],"report":"IMPACT: `shop/web` orders requests failed from 16:27:19 UTC with 502s, followed by timeouts; failures stopped by 16:28:41 UTC.\n\nROOT CAUSE: Service `shop/api`, field `spec.ports[0].targetPort`: it was set to 8081, but the API listens on 8080.\n\nACTIONS TAKEN: Patched `shop/api` targetPort to 8080.\n\nSTATUS: resolved — API endpoints now use port 8080; `api` and `web` are both 2/2 ready, and the synthetic probe recorded five consecutive 200 responses.\n\nESCALATION: none.\n\nFOLLOW-UP: Add a deployment validation that checks service target ports against the ports where containers listen."}