{"id":"s8-gpt-6-luna-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/`.\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":3.5,"kind":"say","text":"I’ll follow the runbook’s order: establish the failure pattern and start time, inspect recent rollout history, then check the service path and logs before making the smallest authorized change."},{"t":3.6,"kind":"run","cmd":"kubectl -n shop logs deploy/synthetic --since=30m --timestamps","out":"2026-11-04T16:05:58.958883008Z 2026-11-04T16:05:58Z GET /orders 000\n2026-11-04T16:06:00.973269473Z 2026-11-04T16:06:00Z GET /orders 000\n2026-11-04T16:06:02.984564772Z 2026-11-04T16:06:02Z GET /orders 000\n2026-11-04T16:06:04.994949589Z 2026-11-04T16:06:04Z GET /orders 200\n2026-11-04T16:06:07.005199183Z 2026-11-04T16:06:07Z GET /orders 200\n2026-11-04T16:06:09.009583379Z 2026-11-04T16:06:09Z GET /orders 200\n2026-11-04T16:06:11.015013903Z 2026-11-04T16:06:11Z GET /orders 200\n2026-11-04T16:06:13.021918048Z 2026-11-04T16:06:13Z GET /orders 200\n2026-11-04T16:06:15.039696392Z 2026-11-04T16:06:15Z GET /orders 200\n2026-11-04T16:06:19.049469075Z 2026-11-04T16:06:19Z GET /orders 504\n2026-11-04T16:06:23.059275658Z 2026-11-04T16:06:23Z GET /orders 504\n2026-11-04T16:06:27.074033264Z 2026-11-04T16:06:27Z GET /orders 504\n2026-11-04T16:06:31.087493301Z 2026-11-04T16:06:31Z GET /orders 504\n2026-11-04T16:06:35.100530568Z 2026-11-04T16:06:35Z GET /orders 504\n2026-11-04T16:06:39.109150784Z 2026-11-04T16:06:39Z GET /orders 504\n2026-11-04T16:06:43.119496998Z 2026-11-04T16:06:43Z GET /orders 504\n2026-11-04T16:06:47.130119534Z 2026-11-04T16:06:47Z GET /orders 504\n2026-11-04T16:06:51.135554888Z 2026-11-04T16:06:51Z GET /orders 504\n2026-11-04T16:06:55.154330295Z 2026-11-04T16:06:55Z GET /orders 504\n2026-11-04T16:06:59.163889613Z 2026-11-04T16:06:59Z GET /orders 504\n2026-11-04T16:07:03.172422536Z 2026-11-04T16:07:03Z GET /orders 504\n2026-11-04T16:07:07.184398015Z 2026-11-04T16:07:07Z GET /orders 504\n2026-11-04T16:07:11.196354273Z 2026-11-04T16:07:11Z GET /orders 504\n2026-11-04T16:07:15.216356709Z 2026-11-04T16:07:15Z GET /orders 504","more":0},{"t":3.6,"kind":"run","cmd":"kubectl -n shop get deploy,rs,pod,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 0/1 1 0 81s worker python:3.13-alpine app=worker\n\nNAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR\nreplicaset.apps/api-7d87b9fcf5 2 2 2 81s api python:3.13-alpine app=api,pod-template-hash=7d87b9fcf5\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-765c764598 2 2 2 64s nginx nginx:1.29-alpine app=web,pod-template-hash=765c764598\nreplicaset.apps/web-86cc98785b 0 0 0 81s nginx nginx:1.29-alpine app=web,pod-template-hash=86cc98785b\nreplicaset.apps/worker-85767c58ff 0 0 0 81s worker python:3.13-alpine app=worker,pod-template-hash=85767c58ff\nreplicaset.apps/worker-8d9d856dd 1 1 0 64s worker python:3.13-alpine app=worker,pod-template-hash=8d9d856dd\n\nNAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES\npod/api-7d87b9fcf5-4xh8k 1/1 Running 0 81s 10.244.0.29 oncall-lab-control-plane \npod/api-7d87b9fcf5-5wlt9 1/1 Running 0 81s 10.244.0.28 oncall-lab-control-plane \npod/db-5c45bf6fd6-7dbcx 1/1 Running 0 81s 10.244.0.27 oncall-lab-control-plane \npod/synthetic-5cc5f987df-s2j6f 1/1 Running 0 81s 10.244.0.33 oncall-lab-control-plane \npod/web-765c764598-5qblg 1/1 Running 0 64s 10.244.0.35 oncall-lab-control-plane \npod/web-765c764598-rlq6k 1/1 Running 0 62s 10.244.0.36 oncall-lab-control-plane \npod/worker-8d9d856dd-q6lj9 0/1 OOMKilled 3 (48s ago) 64s 10.244.0.34 oncall-lab-control-plane \n\nNAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR\nservice/api ClusterIP 10.96.136.214 8080/TCP 81s app=api\nservice/db ClusterIP 10.96.115.140 5432/TCP 81s app=db\nservice/web ClusterIP 10.96.211.188 80/TCP 81s app=web\n\nNAME ENDPOINTS AGE\nendpoints/api 10.244.0.28:8080,10.244.0.29:8080 81s\nendpoints/db 10.244.0.27:5432 81s\nendpoints/web 10.244.0.35:80,10.244.0.36:80 81s","more":0},{"t":3.7,"kind":"run","cmd":"kubectl -n shop rollout history deploy/web && kubectl -n shop rollout history deploy/api && kubectl -n shop rollout history deploy/db","out":"deployment.apps/web \nREVISION CHANGE-CAUSE\n1 \n2 release 2026.11.3: edge routing for orders-v2\n\ndeployment.apps/api \nREVISION CHANGE-CAUSE\n1 \n\ndeployment.apps/db \nREVISION CHANGE-CAUSE\n1 ","more":0},{"t":9.7,"kind":"say","text":"The synthetic probe shows healthy `200`s until 16:06:15, then continuous `504`s from 16:06:19 onward. `web` is on revision 2, with its rollout starting about when failures began; `api` and `db` are ready and have endpoints. I’m confirming the web revision’s routing change and checking backend logs, then I’ll roll back the matching web rollout if that evidence holds."},{"t":9.8,"kind":"run","cmd":"kubectl -n shop get events --sort-by=.lastTimestamp","out":"LAST SEEN TYPE REASON OBJECT MESSAGE\n87s Normal Pulled pod/web-86cc98785b-fs8ls Container image \"nginx:1.29-alpine\" already present on machine and can be accessed by the pod\n87s Normal Scheduled pod/web-86cc98785b-wbsg2 Successfully assigned shop/web-86cc98785b-wbsg2 to oncall-lab-control-plane\n87s Normal Created pod/api-7d87b9fcf5-4xh8k Container created\n87s Normal Started pod/api-7d87b9fcf5-4xh8k Container started\n87s Warning Unhealthy pod/api-7d87b9fcf5-4xh8k Readiness probe failed: Get \"http://10.244.0.29:8080/healthz\": dial tcp 10.244.0.29:8080: connect: connection refused\n87s Normal Scheduled pod/api-7d87b9fcf5-5wlt9 Successfully assigned shop/api-7d87b9fcf5-5wlt9 to oncall-lab-control-plane\n87s Normal Pulled pod/api-7d87b9fcf5-5wlt9 Container image \"python:3.13-alpine\" already present on machine and can be accessed by the pod\n87s Normal Created pod/api-7d87b9fcf5-5wlt9 Container created\n87s Normal Started pod/api-7d87b9fcf5-5wlt9 Container started\n87s Warning Unhealthy pod/api-7d87b9fcf5-5wlt9 Readiness probe failed: Get \"http://10.244.0.28:8080/healthz\": dial tcp 10.244.0.28:8080: connect: connection refused\n87s Normal SuccessfulCreate replicaset/api-7d87b9fcf5 Created pod: api-7d87b9fcf5-5wlt9\n87s Normal SuccessfulCreate replicaset/api-7d87b9fcf5 Created pod: api-7d87b9fcf5-4xh8k\n87s Normal ScalingReplicaSet deployment/api Scaled up replica set api-7d87b9fcf5 from 0 to 2\n87s Normal Scheduled pod/db-5c45bf6fd6-7dbcx Successfully assigned shop/db-5c45bf6fd6-7dbcx to oncall-lab-control-plane\n87s Normal Pulled pod/db-5c45bf6fd6-7dbcx Container image \"postgres:17-alpine\" already present on machine and can be accessed by the pod\n87s Normal Created pod/db-5c45bf6fd6-7dbcx Container created\n87s Normal Started pod/db-5c45bf6fd6-7dbcx Container started\n87s Warning Unhealthy pod/db-5c45bf6fd6-7dbcx Readiness probe failed: /var/run/postgresql:5432 - no response\n87s Normal SuccessfulCreate replicaset/db-5c45bf6fd6 Created pod: db-5c45bf6fd6-7dbcx\n87s Normal ScalingReplicaSet deployment/db Scaled up replica set db-5c45bf6fd6 from 0 to 1\n87s Normal Scheduled pod/synthetic-5cc5f987df-s2j6f Successfully assigned shop/synthetic-5cc5f987df-s2j6f to oncall-lab-control-plane\n87s Normal Pulled pod/synthetic-5cc5f987df-s2j6f Container image \"curlimages/curl:8.17.0\" already present on machine and can be accessed by the pod\n87s Normal Created pod/synthetic-5cc5f987df-s2j6f Container created\n87s Normal Started pod/synthetic-5cc5f987df-s2j6f Container started\n87s Normal SuccessfulCreate replicaset/synthetic-5cc5f987df Created pod: synthetic-5cc5f987df-s2j6f\n87s Normal ScalingReplicaSet deployment/synthetic Scaled up replica set synthetic-5cc5f987df from 0 to 1\n87s Normal ScalingReplicaSet deployment/worker Scaled up replica set worker-85767c58ff from 0 to 1\n87s Normal SuccessfulCreate replicaset/worker-85767c58ff Created pod: worker-85767c58ff-wrwp9\n87s Normal Started pod/worker-85767c58ff-wrwp9 Container started\n87s Normal Created pod/worker-85767c58ff-wrwp9 Container created\n87s Normal Pulled pod/worker-85767c58ff-wrwp9 Contain","more":38},{"t":9.8,"kind":"run","cmd":"kubectl -n shop logs deploy/web --since=15m --all-pods --timestamps","out":"[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.874414343Z /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.874475260Z /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.878614377Z /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.884419425Z 10-listen-on-ipv6-by-default.sh: info: can not modify /etc/nginx/conf.d/default.conf (read-only file system?)\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.885201390Z /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.885216223Z /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.892712618Z /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.896713859Z /docker-entrypoint.sh: Configuration complete; ready for start up\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.934192665Z 2026/11/04 16:06:15 [notice] 1#1: using the \"epoll\" event method\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.934246832Z 2026/11/04 16:06:15 [notice] 1#1: nginx/1.29.8\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.935721928Z 2026/11/04 16:06:15 [notice] 1#1: built by gcc 15.2.0 (Alpine 15.2.0) \n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.935740928Z 2026/11/04 16:06:15 [notice] 1#1: OS: Linux 6.8.0-117-generic\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.935744136Z 2026/11/04 16:06:15 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1073741816:1073741816\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.935745303Z 2026/11/04 16:06:15 [notice] 1#1: start worker processes\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.935746261Z 2026/11/04 16:06:15 [notice] 1#1: start worker process 27\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.935747220Z 2026/11/04 16:06:15 [notice] 1#1: start worker process 28\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.935748220Z 2026/11/04 16:06:15 [notice] 1#1: start worker process 29\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.935749136Z 2026/11/04 16:06:15 [notice] 1#1: start worker process 30\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.935750053Z 2026/11/04 16:06:15 [notice] 1#1: start worker process 31\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.935751095Z 2026/11/04 16:06:15 [notice] 1#1: start worker process 32\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.935752011Z 2026/11/04 16:06:15 [notice] 1#1: start worker process 33\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:15.935752970Z 2026/11/04 16:06:15 [notice] 1#1: start worker process 34\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:16.307385216Z 10.244.0.1 - - [04/Nov/2026:16:06:16 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:19.047554435Z 2026/11/04 16:06:19 [error] 31#31: *3 upstream timed out (110: Operation timed out) while connecting to upstream, client: 10.244.0.33, server: , request: \"GET /orders HTTP/1.1\", upstream: \"http://10.96.200.200:8080/orders\", host: \"web\"\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:19.047648602Z 10.244.0.33 - - [04/Nov/2026:16:06:19 +0000] \"GET /orders HTTP/1.1\" 504 167 \"-\" \"curl/8.17.0\" \"-\"\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:21.307254749Z 10.244.0.1 - - [04/Nov/2026:16:06:21 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:26.307204357Z 10.244.0.1 - - [04/Nov/2026:16:06:26 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n[pod/web-765c764598-5qblg/nginx] 2026-11-04T16:06:27.068432968Z 2026/11/04 16:06:27 [error] 27#27: *7 upstream t","more":66},{"t":9.8,"kind":"run","cmd":"kubectl -n shop get configmap -o yaml && kubectl -n shop get deploy web -o yaml","out":"apiVersion: v1\nitems:\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):\n if self.path == \"/healthz\":\n return self.send(200, {\"ok\": True})\n if self.path.startswith(\"/orders\"):\n if db_ok():\n return self.send(200, {\"orders\": [{\"id\": 1, \"total\": 42}]})\n return self.send(503, {\"error\": \"database unavailable\"})\n if self.path == \"/jobs\":\n return self.send(200, {\"jobs\": [{\"id\": int(time.time())}]})\n self.send(404, {\"error\": \"not found\"})\n print(f\"api listening on 8080, db={host}:{port}\", flush=True)\n ThreadingHTTPServer((\"\", 8080), H).serve_forever()\n worker.py: |\n import os, time, urllib.request\n mb = int(os.environ.get(\"BATCH_MB\", \"64\"))","more":186},{"t":9.8,"kind":"run","cmd":"kubectl -n shop logs deploy/api --since=15m --all-pods --timestamps && kubectl -n shop logs deploy/db --since=15m --all-pods --timestamps","out":"[pod/api-7d87b9fcf5-4xh8k/api] 2026-11-04T16:05:58.024901185Z api listening on 8080, db=db:5432\n[pod/api-7d87b9fcf5-5wlt9/api] 2026-11-04T16:05:58.021534324Z api listening on 8080, db=db:5432\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.865362203Z The files belonging to this database system will be owned by user \"postgres\".\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.865376578Z This user must also own the server process.\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.865377537Z \n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.865378370Z The database cluster will be initialized with locale \"en_US.utf8\".\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.865378912Z The default database encoding has accordingly been set to \"UTF8\".\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.865379370Z The default text search configuration will be set to \"english\".\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.865379787Z \n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.865380245Z Data page checksums are disabled.\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.865380703Z \n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.865381120Z fixing permissions on existing directory /var/lib/postgresql/data/pgdata ... ok\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.865382037Z creating subdirectories ... ok\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.865382537Z selecting dynamic shared memory implementation ... posix\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.873871023Z selecting default \"max_connections\" ... 100\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.890959039Z selecting default \"shared_buffers\" ... 128MB\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.911175164Z selecting default time zone ... UTC\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.911185998Z creating configuration files ... ok\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:57.964541854Z running bootstrap script ... ok\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.040909692Z sh: locale: not found\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.040927067Z 2026-11-04 16:05:58.040 UTC [49] WARNING: no usable system locales were found\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.185140589Z performing post-bootstrap initialization ... ok\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.187614401Z syncing data to disk ... ok\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.187625443Z \n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.187626401Z \n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.187628276Z Success. You can now start the database server using:\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.187628776Z \n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.187629401Z pg_ctl -D /var/lib/postgresql/data/pgdata -l logfile start\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.187630235Z \n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.187617151Z initdb: warning: enabling \"trust\" authentication for local connections\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.187633693Z 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.\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.207578733Z waiting for server to start....2026-11-04 16:05:58.207 UTC [55] LOG: starting PostgreSQL 17.11 on aarch64-unknown-linux-musl, compiled by gcc (Alpine 15.2.0) 15.2.0, 64-bit\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.209225871Z 2026-11-04 16:05:58.209 UTC [55] LOG: listening on Unix socket \"/var/run/postgresql/.s.PGSQL.5432\"\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.210108212Z 2026-11-04 16:05:58.210 UTC [58] LOG: database system was shut down at 2026-11-04 16:05:58 UTC\n[pod/db-5c45bf6fd6-7dbcx/postgres] 2026-11-04T16:05:58.211662641Z 2026-11-04 16:05:58.211 UTC [5","more":18},{"t":9.9,"kind":"run","cmd":"kubectl -n shop describe deploy/web && kubectl -n shop rollout history deploy/web --revision=2 && kubectl -n shop rollout history deploy/web --revision=1","out":"Name: web\nNamespace: shop\nCreationTimestamp: Wed, 04 Nov 2026 16:05:57 +0000\nLabels: app=web\nAnnotations: deployment.kubernetes.io/revision: 2\n kubernetes.io/change-cause: release 2026.11.3: edge routing for orders-v2\nSelector: app=web\nReplicas: 2 desired | 2 updated | 2 total | 2 available | 0 unavailable\nStrategyType: RollingUpdate\nMinReadySeconds: 0\nRollingUpdateStrategy: 25% max unavailable, 25% max surge\nPod Template:\n Labels: app=web\n Containers:\n nginx:\n Image: nginx:1.29-alpine\n Port: 80/TCP\n Host Port: 0/TCP\n Readiness: http-get http://:80/healthz delay=0s timeout=1s period=5s successThreshold=1 failureThreshold=3\n Environment: \n Mounts:\n /etc/nginx/conf.d from conf (rw)\n Volumes:\n conf:\n Type: ConfigMap (a volume populated by a ConfigMap)\n Name: web-nginx-v3\n Optional: false\n Node-Selectors: \n Tolerations: \nConditions:\n Type Status Reason\n ---- ------ ------\n Available True MinimumReplicasAvailable\n Progressing True NewReplicaSetAvailable\nOldReplicaSets: web-86cc98785b (0/0 replicas created)\nNewReplicaSet: web-765c764598 (2/2 replicas created)\nEvents:\n Type Reason Age From Message\n ---- ------ ---- ---- -------\n Normal ScalingReplicaSet 87s deployment-controller Scaled up replica set web-86cc98785b from 0 to 2","more":46},{"t":13.4,"kind":"say","text":"Confirmed: revision 2’s `web-nginx-v3` ConfigMap sends `/` to hard-coded `10.96.200.200:8080`, while the healthy `api` service is `10.96.136.214:8080`. `web` logs show connection timeouts to that wrong upstream beginning at 16:06:19. I’m applying the runbook-authorized rollback of `web` to revision 1; I’m leaving the unrelated crashing worker unchanged because this alert is on `/orders`."},{"t":13.5,"kind":"run","cmd":"kubectl -n shop rollout undo deploy/web","out":"Warning: resource deployments/web 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/web rolled back","more":0},{"t":17.4,"kind":"run","cmd":"kubectl -n shop rollout status deploy/web --timeout=120s && kubectl -n shop get deploy/web,pods -l app=web -o wide","out":"deployment \"web\" successfully rolled out\nerror: selectors and the all flag cannot be used when passing resource/name arguments","more":0},{"t":17.4,"kind":"run","cmd":"kubectl -n shop get deploy web -o jsonpath='{.spec.template.spec.volumes[?(@.name==\"conf\")].configMap.name}{\"\\n\"}' && kubectl -n shop get endpoints api web -o wide","out":"web-nginx\nWarning: v1 Endpoints is deprecated in v1.33+; use discovery.k8s.io/v1 EndpointSlice\nNAME ENDPOINTS AGE\napi 10.244.0.28:8080,10.244.0.29:8080 95s\nweb 10.244.0.37:80,10.244.0.38:80 95s","more":0},{"t":21.5,"kind":"run","cmd":"kubectl -n shop logs deploy/synthetic --since=2m --timestamps","out":"2026-11-04T16:05:58.958883008Z 2026-11-04T16:05:58Z GET /orders 000\n2026-11-04T16:06:00.973269473Z 2026-11-04T16:06:00Z GET /orders 000\n2026-11-04T16:06:02.984564772Z 2026-11-04T16:06:02Z GET /orders 000\n2026-11-04T16:06:04.994949589Z 2026-11-04T16:06:04Z GET /orders 200\n2026-11-04T16:06:07.005199183Z 2026-11-04T16:06:07Z GET /orders 200\n2026-11-04T16:06:09.009583379Z 2026-11-04T16:06:09Z GET /orders 200\n2026-11-04T16:06:11.015013903Z 2026-11-04T16:06:11Z GET /orders 200\n2026-11-04T16:06:13.021918048Z 2026-11-04T16:06:13Z GET /orders 200\n2026-11-04T16:06:15.039696392Z 2026-11-04T16:06:15Z GET /orders 200\n2026-11-04T16:06:19.049469075Z 2026-11-04T16:06:19Z GET /orders 504\n2026-11-04T16:06:23.059275658Z 2026-11-04T16:06:23Z GET /orders 504\n2026-11-04T16:06:27.074033264Z 2026-11-04T16:06:27Z GET /orders 504\n2026-11-04T16:06:31.087493301Z 2026-11-04T16:06:31Z GET /orders 504\n2026-11-04T16:06:35.100530568Z 2026-11-04T16:06:35Z GET /orders 504\n2026-11-04T16:06:39.109150784Z 2026-11-04T16:06:39Z GET /orders 504\n2026-11-04T16:06:43.119496998Z 2026-11-04T16:06:43Z GET /orders 504\n2026-11-04T16:06:47.130119534Z 2026-11-04T16:06:47Z GET /orders 504\n2026-11-04T16:06:51.135554888Z 2026-11-04T16:06:51Z GET /orders 504\n2026-11-04T16:06:55.154330295Z 2026-11-04T16:06:55Z GET /orders 504\n2026-11-04T16:06:59.163889613Z 2026-11-04T16:06:59Z GET /orders 504\n2026-11-04T16:07:03.172422536Z 2026-11-04T16:07:03Z GET /orders 504\n2026-11-04T16:07:07.184398015Z 2026-11-04T16:07:07Z GET /orders 504\n2026-11-04T16:07:11.196354273Z 2026-11-04T16:07:11Z GET /orders 504\n2026-11-04T16:07:15.216356709Z 2026-11-04T16:07:15Z GET /orders 504\n2026-11-04T16:07:19.223322654Z 2026-11-04T16:07:19Z GET /orders 504\n2026-11-04T16:07:23.232064728Z 2026-11-04T16:07:23Z GET /orders 504\n2026-11-04T16:07:27.245355828Z 2026-11-04T16:07:27Z GET /orders 504\n2026-11-04T16:07:31.255101389Z 2026-11-04T16:07:31Z GET /orders 504\n2026-11-04T16:07:33.267804441Z 2026-11-04T16:07:33Z GET /orders 200\n2026-11-04T16:07:35.280640857Z 2026-11-04T16:07:35Z GET /orders 200","more":0},{"t":21.6,"kind":"run","cmd":"kubectl -n shop exec deploy/synthetic -- curl -sS -o /dev/null -w 'GET /orders status=%{http_code}\\n' --max-time 10 http://web/orders","out":"GET /orders status=200","more":0},{"t":21.6,"kind":"run","cmd":"kubectl -n shop get deploy web -o wide && kubectl -n shop get pods -l app=web -o wide && kubectl -n shop rollout history deploy/web","out":"NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR\nweb 2/2 2 2 99s nginx nginx:1.29-alpine app=web\nNAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES\nweb-86cc98785b-88db4 1/1 Running 0 7s 10.244.0.38 oncall-lab-control-plane \nweb-86cc98785b-zfcdz 1/1 Running 0 8s 10.244.0.37 oncall-lab-control-plane \ndeployment.apps/web \nREVISION CHANGE-CAUSE\n2 release 2026.11.3: edge routing for orders-v2\n3 ","more":0}],"report":"IMPACT: `GET /orders` through `shop/web` returned 504s from 16:06:19 until recovery at 16:07:33 UTC.\n\nROOT CAUSE: ConfigMap `shop/web-nginx-v3`, field `data.default.conf`, routed requests to the hard-coded upstream `10.96.200.200:8080` instead of the `api` service.\n\nACTIONS TAKEN:\n1. Rolled back Deployment `shop/web` from the faulty revision to revision 1, which uses ConfigMap `web-nginx`.\n2. Verified the rollout completed with 2/2 web pods ready; synthetic probes returned 200, and a direct `/orders` check returned 200.\n\nSTATUS: Resolved. The web rollout is healthy and `/orders` is returning 200.\n\nESCALATION: None.\n\nFOLLOW-UP: Validate upstreams resolve through Kubernetes Services, and include an `/orders` check in release verification before completing web rollouts."}