{"id":"s4-deepseek-v4-1-flash-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":1.9,"kind":"say","text":"I'll start investigating. Let me get the lay of the land."},{"t":2.0,"kind":"run","cmd":"kubectl -n shop get pods -o wide","out":"NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES\napi-7d87b9fcf5-rvml5 1/1 Running 0 79s 10.244.0.40 oncall-lab-control-plane \napi-7d87b9fcf5-tdq89 1/1 Running 0 79s 10.244.0.41 oncall-lab-control-plane \ndb-5c45bf6fd6-2xgnq 1/1 Running 0 79s 10.244.0.39 oncall-lab-control-plane \nsynthetic-5cc5f987df-jfpxv 1/1 Running 0 79s 10.244.0.45 oncall-lab-control-plane \nweb-86cc98785b-2tljq 0/1 Running 0 79s 10.244.0.44 oncall-lab-control-plane \nweb-86cc98785b-r2tk4 0/1 Running 0 79s 10.244.0.43 oncall-lab-control-plane \nworker-85767c58ff-zr4q9 1/1 Running 0 79s 10.244.0.42 oncall-lab-control-plane ","more":0},{"t":2.0,"kind":"run","cmd":"kubectl -n shop get events --sort-by=.lastTimestamp | tail -40","out":"79s Normal Created pod/api-7d87b9fcf5-tdq89 Container created\n79s Normal Started pod/api-7d87b9fcf5-tdq89 Container started\n79s Warning Unhealthy pod/api-7d87b9fcf5-tdq89 Readiness probe failed: Get \"http://10.244.0.41:8080/healthz\": dial tcp 10.244.0.41:8080: connect: connection refused\n79s Normal SuccessfulCreate replicaset/api-7d87b9fcf5 Created pod: api-7d87b9fcf5-rvml5\n79s Normal SuccessfulCreate replicaset/api-7d87b9fcf5 Created pod: api-7d87b9fcf5-tdq89\n79s Normal Started pod/synthetic-5cc5f987df-jfpxv Container started\n79s Normal Scheduled pod/db-5c45bf6fd6-2xgnq Successfully assigned shop/db-5c45bf6fd6-2xgnq to oncall-lab-control-plane\n79s Normal Pulled pod/db-5c45bf6fd6-2xgnq Container image \"postgres:17-alpine\" already present on machine and can be accessed by the pod\n79s Normal Created pod/db-5c45bf6fd6-2xgnq Container created\n79s Normal Started pod/db-5c45bf6fd6-2xgnq Container started\n79s Warning Unhealthy pod/db-5c45bf6fd6-2xgnq Readiness probe failed: /var/run/postgresql:5432 - no response\n79s Normal SuccessfulCreate replicaset/db-5c45bf6fd6 Created pod: db-5c45bf6fd6-2xgnq\n79s Normal ScalingReplicaSet deployment/db Scaled up replica set db-5c45bf6fd6 from 0 to 1\n79s Normal Scheduled pod/synthetic-5cc5f987df-jfpxv Successfully assigned shop/synthetic-5cc5f987df-jfpxv to oncall-lab-control-plane\n79s Normal Pulled pod/synthetic-5cc5f987df-jfpxv Container image \"curlimages/curl:8.17.0\" already present on machine and can be accessed by the pod\n79s Normal Pulled pod/api-7d87b9fcf5-rvml5 Container image \"python:3.13-alpine\" already present on machine and can be accessed by the pod\n79s Normal Scheduled pod/api-7d87b9fcf5-rvml5 Successfully assigned shop/api-7d87b9fcf5-rvml5 to oncall-lab-control-plane\n79s Normal ScalingReplicaSet deployment/worker Scaled up replica set worker-85767c58ff from 0 to 1\n79s Normal ScalingReplicaSet deployment/synthetic Scaled up replica set synthetic-5cc5f987df from 0 to 1\n79s Normal Scheduled pod/web-86cc98785b-2tljq Successfully assigned shop/web-86cc98785b-2tljq to oncall-lab-control-plane\n79s Normal Pulled pod/web-86cc98785b-2tljq Container image \"nginx:1.29-alpine\" already present on machine and can be accessed by the pod\n79s Normal Created pod/web-86cc98785b-2tljq Container created\n79s Normal Started pod/web-86cc98785b-2tljq Container started\n79s Warning Unhealthy pod/web-86cc98785b-2tljq Readiness probe failed: Get \"http://10.244.0.44:80/healthz\": dial tcp 10.244.0.44:80: connect: connection refused\n79s Normal SuccessfulCreate replicaset/synthetic-5cc5f987df Created pod: synthetic-5cc5f987df-jfpxv\n79s Normal Scheduled pod/web-86cc98785b-r2tk4 Successfully assigned shop/web-86cc98785b-r2tk4 to oncall-lab-control-plane\n79s Normal Pulled pod/web-86cc98785b-r2tk4 Container image \"nginx:1.29-alpine\" already present on machine and can be accessed by the pod\n79s Normal Created pod/web-86cc98785b-r2tk4 Container created\n79s Normal Started pod/web-86cc98785b-r2tk4 Container started\n79s Warning Unhealthy pod/web-86cc98785b-r2tk4 Readiness probe failed: Get \"http://10.244.0.43:80/healthz\": dial tcp 10.244.0.43:80: connect: connection","more":1},{"t":2.0,"kind":"run","cmd":"kubectl -n shop get all -o wide","out":"NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES\npod/api-7d87b9fcf5-rvml5 1/1 Running 0 79s 10.244.0.40 oncall-lab-control-plane \npod/api-7d87b9fcf5-tdq89 1/1 Running 0 79s 10.244.0.41 oncall-lab-control-plane \npod/db-5c45bf6fd6-2xgnq 1/1 Running 0 79s 10.244.0.39 oncall-lab-control-plane \npod/synthetic-5cc5f987df-jfpxv 1/1 Running 0 79s 10.244.0.45 oncall-lab-control-plane \npod/web-86cc98785b-2tljq 0/1 Running 0 79s 10.244.0.44 oncall-lab-control-plane \npod/web-86cc98785b-r2tk4 0/1 Running 0 79s 10.244.0.43 oncall-lab-control-plane \npod/worker-85767c58ff-zr4q9 1/1 Running 0 79s 10.244.0.42 oncall-lab-control-plane \n\nNAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR\nservice/api ClusterIP 10.96.78.146 8080/TCP 79s app=api\nservice/db ClusterIP 10.96.255.216 5432/TCP 79s app=db\nservice/web ClusterIP 10.96.58.246 80/TCP 79s app=web\n\nNAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR\ndeployment.apps/api 2/2 2 2 79s api python:3.13-alpine app=api\ndeployment.apps/db 1/1 1 1 79s postgres postgres:17-alpine app=db\ndeployment.apps/synthetic 1/1 1 1 79s curl curlimages/curl:8.17.0 app=synthetic\ndeployment.apps/web 0/2 2 0 79s nginx nginx:1.29-alpine app=web\ndeployment.apps/worker 1/1 1 1 79s worker python:3.13-alpine app=worker\n\nNAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR\nreplicaset.apps/api-7d87b9fcf5 2 2 2 79s api python:3.13-alpine app=api,pod-template-hash=7d87b9fcf5\nreplicaset.apps/db-5c45bf6fd6 1 1 1 79s postgres postgres:17-alpine app=db,pod-template-hash=5c45bf6fd6\nreplicaset.apps/synthetic-5cc5f987df 1 1 1 79s curl curlimages/curl:8.17.0 app=synthetic,pod-template-hash=5cc5f987df\nreplicaset.apps/web-86cc98785b 2 2 0 79s nginx nginx:1.29-alpine app=web,pod-template-hash=86cc98785b\nreplicaset.apps/worker-85767c58ff 1 1 1 79s worker python:3.13-alpine app=worker,pod-template-hash=85767c58ff","more":0},{"t":3.8,"kind":"say","text":"Web pods are running but not ready (502). Let me dig into logs and configuration."},{"t":3.8,"kind":"run","cmd":"kubectl -n shop get configmap,secret","out":"NAME DATA AGE\nconfigmap/api-code 2 81s\nconfigmap/api-config 2 81s\nconfigmap/kube-root-ca.crt 1 81s\nconfigmap/web-nginx 1 81s","more":0},{"t":3.8,"kind":"run","cmd":"kubectl -n shop logs deploy/synthetic --tail=30","out":"2026-11-03T21:36:20Z GET /orders 502\n2026-11-03T21:36:22Z GET /orders 502\n2026-11-03T21:36:24Z GET /orders 502\n2026-11-03T21:36:26Z GET /orders 502\n2026-11-03T21:36:28Z GET /orders 502\n2026-11-03T21:36:30Z GET /orders 502\n2026-11-03T21:36:32Z GET /orders 000\n2026-11-03T21:36:34Z GET /orders 000\n2026-11-03T21:36:36Z GET /orders 000\n2026-11-03T21:36:38Z GET /orders 000\n2026-11-03T21:36:40Z GET /orders 000\n2026-11-03T21:36:42Z GET /orders 000\n2026-11-03T21:36:44Z GET /orders 000\n2026-11-03T21:36:46Z GET /orders 000\n2026-11-03T21:36:48Z GET /orders 000\n2026-11-03T21:36:50Z GET /orders 000\n2026-11-03T21:36:52Z GET /orders 000\n2026-11-03T21:36:54Z GET /orders 000\n2026-11-03T21:36:56Z GET /orders 000\n2026-11-03T21:36:58Z GET /orders 000\n2026-11-03T21:37:00Z GET /orders 000\n2026-11-03T21:37:02Z GET /orders 000\n2026-11-03T21:37:04Z GET /orders 000\n2026-11-03T21:37:06Z GET /orders 000\n2026-11-03T21:37:08Z GET /orders 000\n2026-11-03T21:37:10Z GET /orders 000\n2026-11-03T21:37:12Z GET /orders 000\n2026-11-03T21:37:14Z GET /orders 000\n2026-11-03T21:37:16Z GET /orders 000\n2026-11-03T21:37:18Z GET /orders 000","more":0},{"t":3.8,"kind":"run","cmd":"kubectl -n shop logs deploy/api --tail=40","out":"Found 2 pods, using pod/api-7d87b9fcf5-rvml5\napi listening on 8080, db=db:5432","more":0},{"t":3.8,"kind":"run","cmd":"kubectl -n shop logs deploy/db --tail=40","out":"running bootstrap script ... ok\nsh: locale: not found\n2026-11-03 21:35:59.011 UTC [49] WARNING: no usable system locales were found\nperforming post-bootstrap initialization ... ok\nsyncing data to disk ... ok\n\n\nSuccess. You can now start the database server using:\n\n pg_ctl -D /var/lib/postgresql/data/pgdata -l logfile start\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.\nwaiting for server to start....2026-11-03 21:35:59.180 UTC [55] LOG: starting PostgreSQL 17.11 on aarch64-unknown-linux-musl, compiled by gcc (Alpine 15.2.0) 15.2.0, 64-bit\n2026-11-03 21:35:59.181 UTC [55] LOG: listening on Unix socket \"/var/run/postgresql/.s.PGSQL.5432\"\n2026-11-03 21:35:59.182 UTC [58] LOG: database system was shut down at 2026-11-03 21:35:59 UTC\n2026-11-03 21:35:59.183 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....2026-11-03 21:35:59.279 UTC [55] LOG: received fast shutdown request\n2026-11-03 21:35:59.280 UTC [55] LOG: aborting any active transactions\n2026-11-03 21:35:59.280 UTC [55] LOG: background worker \"logical replication launcher\" (PID 61) exited with exit code 1\n2026-11-03 21:35:59.281 UTC [56] LOG: shutting down\n2026-11-03 21:35:59.281 UTC [56] LOG: checkpoint starting: shutdown immediate\n2026-11-03 21:35:59.282 UTC [56] LOG: checkpoint complete: wrote 3 buffers (0.0%); 0 WAL file(s) added, 0 removed, 0 recycled; write=0.001 s, sync=0.001 s, total=0.001 s; sync files=2, longest=0.001 s, average=0.001 s; distance=0 kB, estimate=0 kB; lsn=0/14F3F88, redo lsn=0/14F3F88\n2026-11-03 21:35:59.283 UTC [55] LOG: database system is shut down\n done\nserver stopped\n\nPostgreSQL init process complete; ready for start up.\n\n2026-11-03 21:35:59.390 UTC [1] LOG: starting PostgreSQL 17.11 on aarch64-unknown-linux-musl, compiled by gcc (Alpine 15.2.0) 15.2.0, 64-bit\n2026-11-03 21:35:59.390 UTC [1] LOG: listening on IPv4 address \"0.0.0.0\", port 5432\n2026-11-03 21:35:59.390 UTC [1] LOG: listening on IPv6 address \"::\", port 5432\n2026-11-03 21:35:59.391 UTC [1] LOG: listening on Unix socket \"/var/run/postgresql/.s.PGSQL.5432\"\n2026-11-03 21:35:59.392 UTC [69] LOG: database system was shut down at 2026-11-03 21:35:59 UTC\n2026-11-03 21:35:59.394 UTC [1] LOG: database system is ready to accept connections","more":0},{"t":3.8,"kind":"run","cmd":"kubectl -n shop logs deploy/web --tail=40","out":"Found 2 pods, using pod/web-86cc98785b-2tljq\n10.244.0.45 - - [03/Nov/2026:21:36:09 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.45 - - [03/Nov/2026:21:36:10 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.45 - - [03/Nov/2026:21:36:12 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.45 - - [03/Nov/2026:21:36:12 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.45 - - [03/Nov/2026:21:36:13 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.45 - - [03/Nov/2026:21:36:13 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.45 - - [03/Nov/2026:21:36:14 +0000] \"GET /orders HTTP/1.1\" 200 36 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [03/Nov/2026:21:36:14 +0000] \"GET /healthz HTTP/1.1\" 200 12 \"-\" \"kube-probe/1.37\" \"-\"\n2026/11/03 21:36:19 [error] 28#28: *27 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.78.146:8080/healthz\", host: \"10.244.0.44:80\"\n10.244.0.1 - - [03/Nov/2026:21:36:19 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.45 - - [03/Nov/2026:21:36:20 +0000] \"GET /orders HTTP/1.1\" 502 157 \"-\" \"curl/8.17.0\" \"-\"\n2026/11/03 21:36:20 [error] 28#28: *29 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.45, server: , request: \"GET /orders HTTP/1.1\", upstream: \"http://10.96.78.146:8080/orders\", host: \"web\"\n2026/11/03 21:36:22 [error] 28#28: *31 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.45, server: , request: \"GET /orders HTTP/1.1\", upstream: \"http://10.96.78.146:8080/orders\", host: \"web\"\n10.244.0.45 - - [03/Nov/2026:21:36:22 +0000] \"GET /orders HTTP/1.1\" 502 157 \"-\" \"curl/8.17.0\" \"-\"\n10.244.0.1 - - [03/Nov/2026:21:36:24 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n2026/11/03 21:36:24 [error] 28#28: *33 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.78.146:8080/healthz\", host: \"10.244.0.44:80\"\n2026/11/03 21:36:28 [error] 28#28: *35 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.45, server: , request: \"GET /orders HTTP/1.1\", upstream: \"http://10.96.78.146:8080/orders\", host: \"web\"\n10.244.0.45 - - [03/Nov/2026:21:36:28 +0000] \"GET /orders HTTP/1.1\" 502 157 \"-\" \"curl/8.17.0\" \"-\"\n2026/11/03 21:36:29 [error] 28#28: *37 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.78.146:8080/healthz\", host: \"10.244.0.44:80\"\n10.244.0.1 - - [03/Nov/2026:21:36:29 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n2026/11/03 21:36:29 [error] 28#28: *39 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.78.146:8080/healthz\", host: \"10.244.0.44:80\"\n10.244.0.1 - - [03/Nov/2026:21:36:29 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n10.244.0.1 - - [03/Nov/2026:21:36:34 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n2026/11/03 21:36:34 [error] 28#28: *41 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.78.146:8080/healthz\", host: \"10.244.0.44:80\"\n2026/11/03 21:36:39 [error] 28#28: *43 connect() failed (111: Connection refused) while connecting to upstream, client: 10.244.0.1, server: , request: \"GET /healthz HTTP/1.1\", upstream: \"http://10.96.78.146:8080/healthz\", host: \"10.244.0.44:80\"\n10.244.0.1 - - [03/Nov/2026:21:36:39 +0000] \"GET /healthz HTTP/1.1\" 502 157 \"-\" \"kube-probe/1.37\" \"-\"\n2026/11/03 21:36:44 [error] 28#28: *45 connect() failed (111: Connection refused) while connecting t","more":1},{"t":6.6,"kind":"say","text":"Web can't reach the `api` service (connection refused to 10.96.78.146:8080). Let me inspect services, endpoints and configs."},{"t":6.6,"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: \"2026-11-03T21:35:58Z\"\n generation: 1\n labels:\n app: api\n name: api\n namespace: shop\n resourceVersion: \"179814\"\n uid: 959d13bc-c237-444e-a1a7-c8eb80acf7c6\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":6.6,"kind":"run","cmd":"kubectl -n shop get deploy web -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\":\"web\"},\"name\":\"web\",\"namespace\":\"shop\"},\"spec\":{\"replicas\":2,\"selector\":{\"matchLabels\":{\"app\":\"web\"}},\"template\":{\"metadata\":{\"labels\":{\"app\":\"web\"}},\"spec\":{\"containers\":[{\"image\":\"nginx:1.29-alpine\",\"name\":\"nginx\",\"ports\":[{\"containerPort\":80}],\"readinessProbe\":{\"httpGet\":{\"path\":\"/healthz\",\"port\":80},\"periodSeconds\":5},\"volumeMounts\":[{\"mountPath\":\"/etc/nginx/conf.d\",\"name\":\"conf\"}]}],\"volumes\":[{\"configMap\":{\"name\":\"web-nginx\"},\"name\":\"conf\"}]}}}}\n creationTimestamp: \"2026-11-03T21:35:58Z\"\n generation: 1\n labels:\n app: web\n name: web\n namespace: shop\n resourceVersion: \"179894\"\n uid: 2fc18fd2-f864-42d3-a7c3-ae57da06e3d8\nspec:\n progressDeadlineSeconds: 600\n replicas: 2\n revisionHistoryLimit: 10\n selector:\n matchLabels:\n app: web\n strategy:\n rollingUpdate:\n maxSurge: 25%\n maxUnavailable: 25%\n type: RollingUpdate\n template:\n metadata:\n labels:\n app: web\n spec:\n containers:\n - image: nginx:1.29-alpine\n imagePullPolicy: IfNotPresent\n name: nginx\n ports:\n - containerPort: 80\n protocol: TCP\n readinessProbe:","more":43},{"t":6.7,"kind":"run","cmd":"kubectl -n shop get endpoints -o wide; echo ---; kubectl -n shop get svc -o yaml","out":"Warning: v1 Endpoints is deprecated in v1.33+; use discovery.k8s.io/v1 EndpointSlice\nNAME ENDPOINTS AGE\napi 10.244.0.40:8081,10.244.0.41:8081 84s\ndb 10.244.0.39:5432 84s\nweb 84s\n---\napiVersion: v1\nitems:\n- apiVersion: v1\n kind: Service\n metadata:\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: \"2026-11-03T21:35:58Z\"\n name: api\n namespace: shop\n resourceVersion: \"179856\"\n uid: 826175a9-75d9-46bb-b3d0-0ce3a2e9f983\n spec:\n clusterIP: 10.96.78.146\n clusterIPs:\n - 10.96.78.146\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\n status:\n loadBalancer: {}\n- apiVersion: v1\n kind: Service\n metadata:","more":58},{"t":6.7,"kind":"run","cmd":"kubectl -n shop get configmap api-config -o yaml; echo ===; kubectl -n shop get configmap api-code -o yaml; echo ===; kubectl -n shop get configmap web-nginx -o yaml","out":"apiVersion: v1\ndata:\n DB_HOST: db\n DB_PORT: \"5432\"\nkind: ConfigMap\nmetadata:\n annotations:\n kubectl.kubernetes.io/last-applied-configuration: |\n {\"apiVersion\":\"v1\",\"data\":{\"DB_HOST\":\"db\",\"DB_PORT\":\"5432\"},\"kind\":\"ConfigMap\",\"metadata\":{\"annotations\":{},\"name\":\"api-config\",\"namespace\":\"shop\"}}\n creationTimestamp: \"2026-11-03T21:35:58Z\"\n name: api-config\n namespace: shop\n resourceVersion: \"179659\"\n uid: 0d1ab61f-6c73-4503-be34-8a2f5ad1e5f6\n===\napiVersion: v1\ndata:\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\":","more":52},{"t":10.7,"kind":"say","text":"Found a key fault: the `api` Service has `targetPort: 8081` but the api container listens on `8080`. Let me verify the wider picture before acting."},{"t":10.8,"kind":"run","cmd":"kubectl -n shop get deploy worker -o yaml; echo ===; kubectl -n shop logs deploy/worker --tail=20","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\":\"worker\"},\"name\":\"worker\",\"namespace\":\"shop\"},\"spec\":{\"replicas\":1,\"selector\":{\"matchLabels\":{\"app\":\"worker\"}},\"template\":{\"metadata\":{\"labels\":{\"app\":\"worker\"}},\"spec\":{\"containers\":[{\"command\":[\"python\",\"-u\",\"/app/worker.py\"],\"env\":[{\"name\":\"BATCH_MB\",\"value\":\"64\"}],\"image\":\"python:3.13-alpine\",\"name\":\"worker\",\"resources\":{\"limits\":{\"memory\":\"192Mi\"},\"requests\":{\"cpu\":\"50m\",\"memory\":\"96Mi\"}},\"volumeMounts\":[{\"mountPath\":\"/app\",\"name\":\"code\"}]}],\"volumes\":[{\"configMap\":{\"name\":\"api-code\"},\"name\":\"code\"}]}}}}\n creationTimestamp: \"2026-11-03T21:35:58Z\"\n generation: 1\n labels:\n app: worker\n name: worker\n namespace: shop\n resourceVersion: \"179788\"\n uid: b7d450bd-aa74-4dc0-b21e-6e994a3db7d1\nspec:\n progressDeadlineSeconds: 600\n replicas: 1\n revisionHistoryLimit: 10\n selector:\n matchLabels:\n app: worker\n strategy:\n rollingUpdate:\n maxSurge: 25%\n maxUnavailable: 25%\n type: RollingUpdate\n template:\n metadata:\n labels:\n app: worker\n spec:\n containers:\n - command:\n - python\n - -u\n - /app/worker.py\n env:\n - name: BATCH_MB\n value: \"64\"","more":63},{"t":10.8,"kind":"run","cmd":"kubectl -n shop get cronjob,job,events-writer 2>&1; echo ===; kubectl -n shop get pods --show-labels","out":"error: the server doesn't have a resource type \"events-writer\"\n===\nNAME READY STATUS RESTARTS AGE LABELS\napi-7d87b9fcf5-rvml5 1/1 Running 0 88s app=api,pod-template-hash=7d87b9fcf5\napi-7d87b9fcf5-tdq89 1/1 Running 0 88s app=api,pod-template-hash=7d87b9fcf5\ndb-5c45bf6fd6-2xgnq 1/1 Running 0 88s app=db,pod-template-hash=5c45bf6fd6\nsynthetic-5cc5f987df-jfpxv 1/1 Running 0 88s app=synthetic,pod-template-hash=5cc5f987df\nweb-86cc98785b-2tljq 0/1 Running 0 88s app=web,pod-template-hash=86cc98785b\nweb-86cc98785b-r2tk4 0/1 Running 0 88s app=web,pod-template-hash=86cc98785b\nworker-85767c58ff-zr4q9 1/1 Running 0 88s app=worker,pod-template-hash=85767c58ff","more":0},{"t":10.8,"kind":"run","cmd":"kubectl -n kube-system get pods; echo ===; kubectl -n shop get events-writer 2>&1; kubectl -n shop get deploy 2>&1","out":"NAME READY STATUS RESTARTS AGE\ncoredns-8b8844767-mk7pb 1/1 Running 0 100m\ncoredns-8b8844767-pnbgp 1/1 Running 0 100m\netcd-oncall-lab-control-plane 1/1 Running 0 18h\nkindnet-mpj27 1/1 Running 0 18h\nkube-apiserver-oncall-lab-control-plane 1/1 Running 0 18h\nkube-controller-manager-oncall-lab-control-plane 1/1 Running 0 18h\nkube-proxy-hgvm7 1/1 Running 0 18h\nkube-scheduler-oncall-lab-control-plane 1/1 Running 0 18h\n===\nerror: the server doesn't have a resource type \"events-writer\"\nNAME READY UP-TO-DATE AVAILABLE AGE\napi 2/2 2 2 88s\ndb 1/1 1 1 88s\nsynthetic 1/1 1 1 88s\nweb 0/2 2 0 88s\nworker 1/1 1 1 88s","more":0},{"t":10.9,"kind":"run","cmd":"kubectl -n shop get deploy web -o yaml | grep -i targetPort; echo ---; kubectl -n shop get pod web-86cc98785b-2tljq -o yaml | grep -A5 -i \"image:\"; echo ---nginx-conf---; kubectl -n shop exec web-86cc98785b-2tljq -- cat /etc/nginx/conf.d/default.conf 2>&1","out":"---\n - image: nginx:1.29-alpine\n imagePullPolicy: IfNotPresent\n name: nginx\n ports:\n - containerPort: 80\n protocol: TCP\n--\n image: docker.io/library/nginx:1.29-alpine\n imageID: docker.io/library/nginx@sha256:5616878291a2eed594aee8db4dade5878cf7edcb475e59193904b198d9b830de\n lastState: {}\n name: nginx\n ready: false\n resources: {}\n---nginx-conf---\nserver {\n listen 80;\n location / { proxy_pass http://api:8080; proxy_connect_timeout 2s; proxy_read_timeout 3s; }\n}","more":0},{"t":14.1,"kind":"say","text":"Worker hits the same `api` connection-refused. The single fault is the `api` Service targetPort. Let me confirm rollout history and scan for anything else."},{"t":14.2,"kind":"run","cmd":"kubectl -n shop exec deploy/api -- python -c \"import socket; s=socket.create_connection(('db',5432),2); print('db ok'); s.close()\" 2>&1","out":"db ok","more":0},{"t":14.2,"kind":"run","cmd":"kubectl -n shop get networkpolicy,sa,ingress 2>&1; echo ===; kubectl -n shop get endpointslices -o wide 2>&1","out":"NAME AGE\nserviceaccount/default 91s\n===\nNAME ADDRESSTYPE PORTS ENDPOINTS AGE\napi-vd8kc IPv4 8081 10.244.0.40,10.244.0.41 91s\ndb-fsw9s IPv4 5432 10.244.0.39 91s\nweb-mkf9l IPv4 80 10.244.0.43,10.244.0.44 91s","more":0},{"t":14.3,"kind":"run","cmd":"kubectl -n shop rollout history deploy/api; echo ===; kubectl -n shop rollout history deploy/web; echo ===; kubectl -n shop rollout history deploy/worker","out":"deployment.apps/api \nREVISION CHANGE-CAUSE\n1 \n\n===\ndeployment.apps/web \nREVISION CHANGE-CAUSE\n1 \n\n===\ndeployment.apps/worker \nREVISION CHANGE-CAUSE\n1 ","more":0},{"t":15.7,"kind":"say","text":"The api EndpointSlice confirms it's publishing port 8081. All deployments are revision 1 (no bad rollout to undo). Root cause is an out-of-band edit to the `api` Service. Applying the smallest fix:"},{"t":15.8,"kind":"run","cmd":"kubectl -n shop patch svc api --type merge -p '{\"spec\":{\"ports\":[{\"name\":null,\"port\":8080,\"protocol\":\"TCP\",\"targetPort\":8080}]}}'","out":"service/api patched","more":0},{"t":28.9,"kind":"run","cmd":"sleep 12; kubectl -n shop get endpoints api; echo ===; kubectl -n shop get pods -l app=web; echo ===; kubectl -n shop logs deploy/synthetic --tail=8","out":"Warning: v1 Endpoints is deprecated in v1.33+; use discovery.k8s.io/v1 EndpointSlice\nNAME ENDPOINTS AGE\napi 10.244.0.40:8080,10.244.0.41:8080 106s\n===\nNAME READY STATUS RESTARTS AGE\nweb-86cc98785b-2tljq 1/1 Running 0 106s\nweb-86cc98785b-r2tk4 1/1 Running 0 106s\n===\n2026-11-03T21:37:30Z GET /orders 000\n2026-11-03T21:37:32Z GET /orders 000\n2026-11-03T21:37:34Z GET /orders 000\n2026-11-03T21:37:36Z GET /orders 200\n2026-11-03T21:37:38Z GET /orders 200\n2026-11-03T21:37:40Z GET /orders 200\n2026-11-03T21:37:42Z GET /orders 200\n2026-11-03T21:37:44Z GET /orders 200","more":0},{"t":31.2,"kind":"say","text":"Service restored. Let me confirm worker recovery and overall health, and check for any remaining issues."},{"t":39.5,"kind":"run","cmd":"sleep 8; kubectl -n shop logs deploy/worker --tail=6; echo ===; kubectl -n shop get pods; echo ===; kubectl -n shop get svc api -o jsonpath='{.spec.ports}'; echo; echo ===; kubectl -n shop get deploy","out":"WARN fetch jobs failed: \nprocessed batch\nprocessed batch\nprocessed batch\nprocessed batch\nprocessed batch\n===\nNAME READY STATUS RESTARTS AGE\napi-7d87b9fcf5-rvml5 1/1 Running 0 117s\napi-7d87b9fcf5-tdq89 1/1 Running 0 117s\ndb-5c45bf6fd6-2xgnq 1/1 Running 0 117s\nsynthetic-5cc5f987df-jfpxv 1/1 Running 0 117s\nweb-86cc98785b-2tljq 1/1 Running 0 117s\nweb-86cc98785b-r2tk4 1/1 Running 0 117s\nworker-85767c58ff-zr4q9 1/1 Running 0 117s\n===\n[{\"port\":8080,\"protocol\":\"TCP\",\"targetPort\":8080}]\n===\nNAME READY UP-TO-DATE AVAILABLE AGE\napi 2/2 2 2 117s\ndb 1/1 1 1 117s\nsynthetic 1/1 1 1 117s\nweb 2/2 2 2 117s\nworker 1/1 1 1 117s","more":0}],"report":"Recovered. All pods healthy, synthetic returning 200, worker processing batches again.\n\n## Report\n\n**IMPACT:** Customers calling `http://web/orders` received 502s/timeouts — the synthetic probe recorded 502 then connection failures (000) from 2026-11-03T21:36:20Z until 21:37:36Z. `worker` job fetches also failed during the same window (WorkerQueueLag would have followed).\n\n**ROOT CAUSE:** `Service/shop/api`, field `.spec.ports[0].targetPort`. The Service forwarded port 8080 to pod port **8081**, but the `api` container listens on **8080** (per `Deployment/shop/api` containerPort and its successful `/healthz` readiness probe on 8080). EndpointSlices published `:8081`, so every connection from `web`/`worker` to `api:8080` was refused. This was an out-of-band edit, not a rollout — all Deployments are at revision 1 and the Service's own `last-applied-configuration` still shows a bare `port: 8080` (which would have defaulted targetPort to 8080).\n\n**ACTIONS TAKEN:**\n1. Confirmed the failure path: `../synthetic` 502/000, `web` nginx logs `connect() failed (111: Connection refused) ... upstream: http://:8080`, `worker` logs `urlopen ... Connection refused`.\n2. Verified `db` was healthy (`db ok` socket test from an api pod) and CoreDNS was running — ruled out upstream data-plane/DNS causes.\n3. Patched the single faulty field:\n `kubectl -n shop patch svc api --type merge -p '{\"spec\":{\"ports\":[{\"name\":null,\"port\":8080,\"protocol\":\"TCP\",\"targetPort\":8080}]}}'`\n\n**STATUS:** **Resolved.** Endpoints republished as `10.244.0.40:8080,10.244.0.41:8080`; both `web` pods returned to 1/1 Ready; synthetic switched from 000 to `200` at 21:37:36Z; `worker` resumed logging `processed batch`. All `shop` deployments show available replicas.\n\n**ESCALATION:** none.\n\n**FOLLOW-UP:** Add a guard against Service/container port drift — e.g. an alert or CI check that errors when a Service `targetPort` does not match the target Deployment's `containerPort` — since this change bypassed the applied config (`last-applied-configuration` was never updated)."}