CrashLoopBackOff on c12-stale-lease-5b894c6649-k22gg (hephaisto-chaos)

investigation

model

gpt-oss:120b

steps

12

tool calls

11

tokens

331.8k in / 3.0k out

cost

$0.01

confidence

0.95

ended

Concluded

trace

1. 1 llm model turn internal 37.8s · 22.2k tok · $0.0007

   model output — its reasoning, and the tools it asked for

   -> calls get_pod_logs

2. 2 tool get_pod_logs kubernetes 0ms · 463 B

   arguments

   {"container":"app","name":"c12-stale-lease-5b894c6649-k22gg","namespace":"hephaisto-chaos","previous":true}

   result digest — what the model actually saw

   [step 01a05ef4-cf0f-79ef-a6d9-aef7608f79b9] get_pod_logs
   log digest: 8 lines, 463 bytes
   
   -- repeated patterns --
   x2 [2026-08-31T13:07:20.961082684Z .. 2026-08-31T13:07:20.961082684Z] FATAL: lease at /data/lease is held by c12-stale-lease-5b894c6649-k22gg, which is this pod's own name; refusing to re-take it
   
   -- notable lines --
   log digest: 1 lines, 157 bytes
   
   -- notable lines --
   2026-08-31T13:07:20.961082684Z FATAL: lease at /data/lease is held by c12-stale-lease-5b894c6649-k22gg, which is this pod's own name; refusing to re-take it
   
   -- last 1 lines --
   2026-08-31T13:07:20.961082684Z FATAL: lease at /data/lease is held by c12-stale-lease-5b894c6649-k22gg, which is this pod's own name; refusing to re-take it
   
   -- last 8 lines --
   previous container logs for hephaisto-chaos/c12-stale-lease-5b894c6649-k22gg
   log digest: 1 lines, 157 bytes
   
   -- notable lines --
   2026-08-31T13:07:20.961082684Z FATAL: lease at /data/lease is held by c12-stale-lease-5b894c6649-k22gg, which is this pod's own name; refusing to re-take it
   
   -- last 1 lines --
   2026-08-31T13:07:20.961082684Z FATAL: lease at /data/lease is held by c12-stale-lease-5b894c6649-k22gg, which is this pod's own name; refusing to re-take it
   

3. 3 llm model turn internal 3.5s · 22.8k tok · $0.0007

   model output — its reasoning, and the tools it asked for

   -> calls describe_pod

4. 4 tool describe_pod kubernetes 0ms · 6.3 KiB ~ truncated

   arguments

   {"name":"c12-stale-lease-5b894c6649-k22gg","namespace":"hephaisto-chaos"}

   result digest — what the model actually saw

   [step 01a05ef4-dc94-7f58-b66c-540592c334ef] describe_pod
   log digest: 204 lines, 6429 bytes
   
   -- repeated patterns --
   x7 [#61 .. #192]         cpu: 100m
   x6 [#122 .. #184]     observedGeneration: 1
   x5 [#65 .. #195]         memory: 16Mi
   x3 [#59 .. #190]     resources:
   x3 [#60 .. #191]       limits:
   x3 [#62 .. #193]         memory: 64Mi
   x3 [#63 .. #194]       requests:
   x3 [#123 .. #143]     status: "True"
   x2 [#1 .. #113] apiVersion: v1
   x2 [#22 .. #23]     uid: 9971e93c-e260-4ad7-a4ad-950f174701b7
   
   -- notable lines --
         fi
   
         if [ "$holder" = "$me" ]; then
           echo "FATAL: lease at /data/lease is held by $holder, which is this pod's own name; refusing to re-take it"
           exit 1
         fi
   
   
   -- last 40 lines --
         requests:
           cpu: 10m
           memory: 16Mi
       restartCount: 97
       started: false
       state:
         waiting:
           message: back-off 5m0s restarting failed container=app pod=c12-stale-lease-5b894c6649-k22gg_hephaisto-chaos(99e3c83d-30fe-465e-8bf3-976e8b38c57a)
           reason: CrashLoopBackOff
       volumeMounts:
       - mountPath: /data
         name: state
       - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
         name: kube-api-access-nbgc9
         readOnly: true
         recursiveReadOnly: Disabled
     hostIP: 0.0.0.0
     hostIPs:
     - ip: 0.0.0.0
     observedGeneration: 1
     phase: Running
     podIP: 0.0.0.0
     podIPs:
     - ip: 0.0.0.0
     qosClass: Burstable
     resources:
       limits:
         cpu: 100m
         memory: 64Mi
       requests:
         memory: 16Mi
     startTime: "2026-08-31T05:30:39Z"
   
   events for this pod:
   type     reason   count  objects                               first  last  message
   -------  -------  -----  ------------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
   Warning  BackOff  71     Pod/c12-stale-lease-5b894c6649-k22gg  2m     2m    Back-off restarting failed container app in pod c12-stale-lease-5b894c6649-k22gg_hephaisto-chao…
   Normal   Pulled   19     Pod/c12-stale-lease-5b894c6649-k22gg  4m     4m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
   Normal   Created  10     Pod/c12-stale-lease-5b894c6649-k22gg  50m    50m   Container created
   Normal   Started  9      Pod/c12-stale-lease-5b894c6649-k22gg  56m    56m   Container started
   
   [truncated: 147 of 204 lines omitted]
   

   raw result — the untruncated tool output (6.3 KiB)

   apiVersion: v1
   kind: Pod
   metadata:
     creationTimestamp: "2026-08-31T05:30:36Z"
     generateName: c12-stale-lease-5b894c6649-
     generation: 1
     labels:
       app.kubernetes.io/managed-by: tilt
       app.kubernetes.io/name: c12-stale-lease
       hephaisto.chaos/fault: transient
       hephaisto.chaos/scenario: c12
       pod-template-hash: 5b894c6649
       tilt.dev/pod-template-hash: 9ee601ce5b5d80bf6533
     name: c12-stale-lease-5b894c6649-k22gg
     namespace: hephaisto-chaos
     ownerReferences:
     - apiVersion: apps/v1
       kind: ReplicaSet
       blockOwnerDeletion: true
       controller: true
       name: c12-stale-lease-5b894c6649
       uid: 9971e93c-e260-4ad7-a4ad-950f174701b7
     uid: 99e3c83d-30fe-465e-8bf3-976e8b38c57a
   spec:
     containers:
     - args:
       - |
         sleep 2
   
         # hostname inside a container is the POD name. Stable across container
         # restarts, different for a replacement pod. That is the whole hinge.
         me=$(hostname)
         holder=$(cat /data/lease 2>/dev/null || true)
   
         # First pod ever: take the lease, which is what makes it its own.
         if [ -z "$holder" ]; then
           echo "$me" > /data/lease
           holder=$me
         fi
   
         if [ "$holder" = "$me" ]; then
           echo "FATAL: lease at /data/lease is held by $holder, which is this pod's own name; refusing to re-take it"
           exit 1
         fi
   
         echo "lease at /data/lease is held by $holder; this pod is $me; acquired"
   
         # Stay up and Ready. Verification at T+60s, T+5m and T+15m asks the
         # workload whether it is settled, so this has to outlive all three.
         # Deliberately does NOT rewrite the lease: doing so would make this pod
         # its own holder, and the next container restart would fail again.
         while true; do sleep 30; done
       command:
       - /bin/sh
       - -c
       image: busybox:1.37
       imagePullPolicy: IfNotPresent
       name: app
       resources:
         limits:
           cpu: 100m
           memory: 64Mi
         requests:
           cpu: 10m
           memory: 16Mi
       terminationMessagePath: /dev/termination-log
       terminationMessagePolicy: File
       volumeMounts:
       - mountPath: /data
         name: state
       - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
         name: kube-api-access-nbgc9
         readOnly: true
     dnsPolicy: ClusterFirst
     enableServiceLinks: true
     nodeName: lima-rancher-desktop
     preemptionPolicy: PreemptLowerPriority
     priority: 0
     restartPolicy: Always
     schedulerName: default-scheduler
     securityContext: {}
     serviceAccount: default
     serviceAccountName: default
     terminationGracePeriodSeconds: 1
     tolerations:
     - effect: NoExecute
       key: node.kubernetes.io/not-ready
       operator: Exists
       tolerationSeconds: 300
     - effect: NoExecute
       key: node.kubernetes.io/unreachable
       operator: Exists
       tolerationSeconds: 300
     volumes:
     - name: state
       persistentVolumeClaim:
         claimName: c12-stale-lease-state
     - name: kube-api-access-nbgc9
       projected:
         defaultMode: 420
         sources:
         - serviceAccountToken:
             expirationSeconds: 3607
             path: token
         - configMap:
             items:
             - key: ca.crt
               path: ca.crt
             name: kube-root-ca.crt
         - downwardAPI:
             items:
             - fieldRef:
                 apiVersion: v1
                 fieldPath: metadata.namespace
               path: namespace
   status:
     allocatedResources:
       cpu: 10m
       memory: 16Mi
     conditions:
     - lastTransitionTime: "2026-08-31T11:54:44Z"
       observedGeneration: 1
       status: "True"
       type: PodReadyToStartContainers
     - lastTransitionTime: "2026-08-31T05:30:39Z"
       observedGeneration: 1
       status: "True"
       type: Initialized
     - lastTransitionTime: "2026-08-31T13:07:21Z"
       message: 'containers with unready status: [app]'
       observedGeneration: 1
       reason: ContainersNotReady
       status: "False"
       type: Ready
     - lastTransitionTime: "2026-08-31T13:07:21Z"
       message: 'containers with unready status: [app]'
       observedGeneration: 1
       reason: ContainersNotReady
       status: "False"
       type: ContainersReady
     - lastTransitionTime: "2026-08-31T05:30:39Z"
       observedGeneration: 1
       status: "True"
       type: PodScheduled
     containerStatuses:
     - allocatedResources:
         cpu: 10m
         memory: 16Mi
       containerID: docker://76f288e146be088c064fd4728012b9d2c6b29b67d8dc1b4504de985388e62a86
       image: busybox:1.37
       imageID: docker-pullable://busybox@sha256:9db7b59979c38555a39def84a31fb98b5296952f9e3afd4f6f11f05b07adfab0
       lastState:
         terminated:
           containerID: docker://76f288e146be088c064fd4728012b9d2c6b29b67d8dc1b4504de985388e62a86
           exitCode: 1
           finishedAt: "2026-08-31T13:07:20Z"
           reason: Error
           startedAt: "2026-08-31T13:07:18Z"
       name: app
       ready: false
       resources:
         limits:
           cpu: 100m
           memory: 64Mi
         requests:
           cpu: 10m
           memory: 16Mi
       restartCount: 97
       started: false
       state:
         waiting:
           message: back-off 5m0s restarting failed container=app pod=c12-stale-lease-5b894c6649-k22gg_hephaisto-chaos(99e3c83d-30fe-465e-8bf3-976e8b38c57a)
           reason: CrashLoopBackOff
       volumeMounts:
       - mountPath: /data
         name: state
       - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
         name: kube-api-access-nbgc9
         readOnly: true
         recursiveReadOnly: Disabled
     hostIP: 0.0.0.0
     hostIPs:
     - ip: 0.0.0.0
     observedGeneration: 1
     phase: Running
     podIP: 0.0.0.0
     podIPs:
     - ip: 0.0.0.0
     qosClass: Burstable
     resources:
       limits:
         cpu: 100m
         memory: 64Mi
       requests:
         memory: 16Mi
     startTime: "2026-08-31T05:30:39Z"
   
   events for this pod:
   type     reason   count  objects                               first  last  message
   -------  -------  -----  ------------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
   Warning  BackOff  71     Pod/c12-stale-lease-5b894c6649-k22gg  2m     2m    Back-off restarting failed container app in pod c12-stale-lease-5b894c6649-k22gg_hephaisto-chao…
   Normal   Pulled   19     Pod/c12-stale-lease-5b894c6649-k22gg  4m     4m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
   Normal   Created  10     Pod/c12-stale-lease-5b894c6649-k22gg  50m    50m   Container created
   Normal   Started  9      Pod/c12-stale-lease-5b894c6649-k22gg  56m    56m   Container started
   

5. 5 llm model turn internal 4.3s · 23.6k tok · $0.0007

   model output — its reasoning, and the tools it asked for

   -> calls get_pod

6. 6 tool get_pod kubernetes 0ms · 1.2 KiB

   arguments

   {"name":"c12-stale-lease-5b894c6649-k22gg","namespace":"hephaisto-chaos"}

   result digest — what the model actually saw

   [step 01a05ef4-ed3a-7078-ade1-6bfa229b9cc0] get_pod
   log digest: 16 lines, 1195 bytes
   
   -- last 16 lines --
   pod hephaisto-chaos/c12-stale-lease-5b894c6649-k22gg
   phase: Running  node: lima-rancher-desktop  age: 7h41m
   
   conditions:
   type                       status  reason              message                                since
   -------------------------  ------  ------------------  -------------------------------------  -----
   PodReadyToStartContainers  True    -                   -                                      1h16m
   Initialized                True    -                   -                                      7h40m
   Ready                      False   ContainersNotReady  containers with unready status: [app]  4m
   ContainersReady            False   ContainersNotReady  containers with unready status: [app]  4m
   PodScheduled               True    -                   -                                      7h40m
   
   containers:
   container  ready  state    reason            restarts  last exit       image         requests             limits
   ---------  -----  -------  ----------------  --------  --------------  ------------  -------------------  --------------------
   app        no     waiting  CrashLoopBackOff  97        exit 1 (Error)  busybox:1.37  cpu=10m,memory=16Mi  cpu=100m,memory=64Mi
   

7. 7 llm model turn internal 4.2s · 24.0k tok · $0.0007

   model output — its reasoning, and the tools it asked for

   -> calls describe_pod

8. 8 tool describe_pod kubernetes 0ms · 6.3 KiB ~ truncated

   arguments

   {"name":"c12-stale-lease-5b894c6649-k22gg","namespace":"hephaisto-chaos"}

   result digest — what the model actually saw

   [step 01a05ef4-fdab-7a24-88f1-56ee2bdcd128] describe_pod
   log digest: 204 lines, 6429 bytes
   
   -- repeated patterns --
   x7 [#61 .. #192]         cpu: 100m
   x6 [#122 .. #184]     observedGeneration: 1
   x5 [#65 .. #195]         memory: 16Mi
   x3 [#59 .. #190]     resources:
   x3 [#60 .. #191]       limits:
   x3 [#62 .. #193]         memory: 64Mi
   x3 [#63 .. #194]       requests:
   x3 [#123 .. #143]     status: "True"
   x2 [#1 .. #113] apiVersion: v1
   x2 [#22 .. #23]     uid: 9971e93c-e260-4ad7-a4ad-950f174701b7
   
   -- notable lines --
         fi
   
         if [ "$holder" = "$me" ]; then
           echo "FATAL: lease at /data/lease is held by $holder, which is this pod's own name; refusing to re-take it"
           exit 1
         fi
   
   
   -- last 40 lines --
         requests:
           cpu: 10m
           memory: 16Mi
       restartCount: 97
       started: false
       state:
         waiting:
           message: back-off 5m0s restarting failed container=app pod=c12-stale-lease-5b894c6649-k22gg_hephaisto-chaos(99e3c83d-30fe-465e-8bf3-976e8b38c57a)
           reason: CrashLoopBackOff
       volumeMounts:
       - mountPath: /data
         name: state
       - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
         name: kube-api-access-nbgc9
         readOnly: true
         recursiveReadOnly: Disabled
     hostIP: 0.0.0.0
     hostIPs:
     - ip: 0.0.0.0
     observedGeneration: 1
     phase: Running
     podIP: 0.0.0.0
     podIPs:
     - ip: 0.0.0.0
     qosClass: Burstable
     resources:
       limits:
         cpu: 100m
         memory: 64Mi
       requests:
         memory: 16Mi
     startTime: "2026-08-31T05:30:39Z"
   
   events for this pod:
   type     reason   count  objects                               first  last  message
   -------  -------  -----  ------------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
   Warning  BackOff  71     Pod/c12-stale-lease-5b894c6649-k22gg  2m     2m    Back-off restarting failed container app in pod c12-stale-lease-5b894c6649-k22gg_hephaisto-chao…
   Normal   Pulled   19     Pod/c12-stale-lease-5b894c6649-k22gg  4m     4m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
   Normal   Created  10     Pod/c12-stale-lease-5b894c6649-k22gg  50m    50m   Container created
   Normal   Started  9      Pod/c12-stale-lease-5b894c6649-k22gg  56m    56m   Container started
   
   [truncated: 147 of 204 lines omitted]
   

   raw result — the untruncated tool output (6.3 KiB)

   apiVersion: v1
   kind: Pod
   metadata:
     creationTimestamp: "2026-08-31T05:30:36Z"
     generateName: c12-stale-lease-5b894c6649-
     generation: 1
     labels:
       app.kubernetes.io/managed-by: tilt
       app.kubernetes.io/name: c12-stale-lease
       hephaisto.chaos/fault: transient
       hephaisto.chaos/scenario: c12
       pod-template-hash: 5b894c6649
       tilt.dev/pod-template-hash: 9ee601ce5b5d80bf6533
     name: c12-stale-lease-5b894c6649-k22gg
     namespace: hephaisto-chaos
     ownerReferences:
     - apiVersion: apps/v1
       kind: ReplicaSet
       blockOwnerDeletion: true
       controller: true
       name: c12-stale-lease-5b894c6649
       uid: 9971e93c-e260-4ad7-a4ad-950f174701b7
     uid: 99e3c83d-30fe-465e-8bf3-976e8b38c57a
   spec:
     containers:
     - args:
       - |
         sleep 2
   
         # hostname inside a container is the POD name. Stable across container
         # restarts, different for a replacement pod. That is the whole hinge.
         me=$(hostname)
         holder=$(cat /data/lease 2>/dev/null || true)
   
         # First pod ever: take the lease, which is what makes it its own.
         if [ -z "$holder" ]; then
           echo "$me" > /data/lease
           holder=$me
         fi
   
         if [ "$holder" = "$me" ]; then
           echo "FATAL: lease at /data/lease is held by $holder, which is this pod's own name; refusing to re-take it"
           exit 1
         fi
   
         echo "lease at /data/lease is held by $holder; this pod is $me; acquired"
   
         # Stay up and Ready. Verification at T+60s, T+5m and T+15m asks the
         # workload whether it is settled, so this has to outlive all three.
         # Deliberately does NOT rewrite the lease: doing so would make this pod
         # its own holder, and the next container restart would fail again.
         while true; do sleep 30; done
       command:
       - /bin/sh
       - -c
       image: busybox:1.37
       imagePullPolicy: IfNotPresent
       name: app
       resources:
         limits:
           cpu: 100m
           memory: 64Mi
         requests:
           cpu: 10m
           memory: 16Mi
       terminationMessagePath: /dev/termination-log
       terminationMessagePolicy: File
       volumeMounts:
       - mountPath: /data
         name: state
       - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
         name: kube-api-access-nbgc9
         readOnly: true
     dnsPolicy: ClusterFirst
     enableServiceLinks: true
     nodeName: lima-rancher-desktop
     preemptionPolicy: PreemptLowerPriority
     priority: 0
     restartPolicy: Always
     schedulerName: default-scheduler
     securityContext: {}
     serviceAccount: default
     serviceAccountName: default
     terminationGracePeriodSeconds: 1
     tolerations:
     - effect: NoExecute
       key: node.kubernetes.io/not-ready
       operator: Exists
       tolerationSeconds: 300
     - effect: NoExecute
       key: node.kubernetes.io/unreachable
       operator: Exists
       tolerationSeconds: 300
     volumes:
     - name: state
       persistentVolumeClaim:
         claimName: c12-stale-lease-state
     - name: kube-api-access-nbgc9
       projected:
         defaultMode: 420
         sources:
         - serviceAccountToken:
             expirationSeconds: 3607
             path: token
         - configMap:
             items:
             - key: ca.crt
               path: ca.crt
             name: kube-root-ca.crt
         - downwardAPI:
             items:
             - fieldRef:
                 apiVersion: v1
                 fieldPath: metadata.namespace
               path: namespace
   status:
     allocatedResources:
       cpu: 10m
       memory: 16Mi
     conditions:
     - lastTransitionTime: "2026-08-31T11:54:44Z"
       observedGeneration: 1
       status: "True"
       type: PodReadyToStartContainers
     - lastTransitionTime: "2026-08-31T05:30:39Z"
       observedGeneration: 1
       status: "True"
       type: Initialized
     - lastTransitionTime: "2026-08-31T13:07:21Z"
       message: 'containers with unready status: [app]'
       observedGeneration: 1
       reason: ContainersNotReady
       status: "False"
       type: Ready
     - lastTransitionTime: "2026-08-31T13:07:21Z"
       message: 'containers with unready status: [app]'
       observedGeneration: 1
       reason: ContainersNotReady
       status: "False"
       type: ContainersReady
     - lastTransitionTime: "2026-08-31T05:30:39Z"
       observedGeneration: 1
       status: "True"
       type: PodScheduled
     containerStatuses:
     - allocatedResources:
         cpu: 10m
         memory: 16Mi
       containerID: docker://76f288e146be088c064fd4728012b9d2c6b29b67d8dc1b4504de985388e62a86
       image: busybox:1.37
       imageID: docker-pullable://busybox@sha256:9db7b59979c38555a39def84a31fb98b5296952f9e3afd4f6f11f05b07adfab0
       lastState:
         terminated:
           containerID: docker://76f288e146be088c064fd4728012b9d2c6b29b67d8dc1b4504de985388e62a86
           exitCode: 1
           finishedAt: "2026-08-31T13:07:20Z"
           reason: Error
           startedAt: "2026-08-31T13:07:18Z"
       name: app
       ready: false
       resources:
         limits:
           cpu: 100m
           memory: 64Mi
         requests:
           cpu: 10m
           memory: 16Mi
       restartCount: 97
       started: false
       state:
         waiting:
           message: back-off 5m0s restarting failed container=app pod=c12-stale-lease-5b894c6649-k22gg_hephaisto-chaos(99e3c83d-30fe-465e-8bf3-976e8b38c57a)
           reason: CrashLoopBackOff
       volumeMounts:
       - mountPath: /data
         name: state
       - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
         name: kube-api-access-nbgc9
         readOnly: true
         recursiveReadOnly: Disabled
     hostIP: 0.0.0.0
     hostIPs:
     - ip: 0.0.0.0
     observedGeneration: 1
     phase: Running
     podIP: 0.0.0.0
     podIPs:
     - ip: 0.0.0.0
     qosClass: Burstable
     resources:
       limits:
         cpu: 100m
         memory: 64Mi
       requests:
         memory: 16Mi
     startTime: "2026-08-31T05:30:39Z"
   
   events for this pod:
   type     reason   count  objects                               first  last  message
   -------  -------  -----  ------------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
   Warning  BackOff  71     Pod/c12-stale-lease-5b894c6649-k22gg  2m     2m    Back-off restarting failed container app in pod c12-stale-lease-5b894c6649-k22gg_hephaisto-chao…
   Normal   Pulled   19     Pod/c12-stale-lease-5b894c6649-k22gg  4m     4m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
   Normal   Created  10     Pod/c12-stale-lease-5b894c6649-k22gg  50m    50m   Container created
   Normal   Started  9      Pod/c12-stale-lease-5b894c6649-k22gg  56m    56m   Container started
   

9. 9 llm model turn internal 5.0s · 24.9k tok · $0.0008

   model output — its reasoning, and the tools it asked for

   -> calls describe_pod

10. 10 tool describe_pod kubernetes 0ms · 6.3 KiB ~ truncated

    arguments

    {"name":"c12-stale-lease-5b894c6649-k22gg","namespace":"hephaisto-chaos"}

    result digest — what the model actually saw

    [step 01a05ef5-1146-73a4-9b52-211dc7455f18] describe_pod
    log digest: 204 lines, 6429 bytes
    
    -- repeated patterns --
    x7 [#61 .. #192]         cpu: 100m
    x6 [#122 .. #184]     observedGeneration: 1
    x5 [#65 .. #195]         memory: 16Mi
    x3 [#59 .. #190]     resources:
    x3 [#60 .. #191]       limits:
    x3 [#62 .. #193]         memory: 64Mi
    x3 [#63 .. #194]       requests:
    x3 [#123 .. #143]     status: "True"
    x2 [#1 .. #113] apiVersion: v1
    x2 [#22 .. #23]     uid: 9971e93c-e260-4ad7-a4ad-950f174701b7
    
    -- notable lines --
          fi
    
          if [ "$holder" = "$me" ]; then
            echo "FATAL: lease at /data/lease is held by $holder, which is this pod's own name; refusing to re-take it"
            exit 1
          fi
    
    
    -- last 40 lines --
          requests:
            cpu: 10m
            memory: 16Mi
        restartCount: 97
        started: false
        state:
          waiting:
            message: back-off 5m0s restarting failed container=app pod=c12-stale-lease-5b894c6649-k22gg_hephaisto-chaos(99e3c83d-30fe-465e-8bf3-976e8b38c57a)
            reason: CrashLoopBackOff
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-nbgc9
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-31T05:30:39Z"
    
    events for this pod:
    type     reason   count  objects                               first  last  message
    -------  -------  -----  ------------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff  71     Pod/c12-stale-lease-5b894c6649-k22gg  2m     2m    Back-off restarting failed container app in pod c12-stale-lease-5b894c6649-k22gg_hephaisto-chao…
    Normal   Pulled   19     Pod/c12-stale-lease-5b894c6649-k22gg  4m     4m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created  10     Pod/c12-stale-lease-5b894c6649-k22gg  50m    50m   Container created
    Normal   Started  9      Pod/c12-stale-lease-5b894c6649-k22gg  56m    56m   Container started
    
    [truncated: 147 of 204 lines omitted]
    

    raw result — the untruncated tool output (6.3 KiB)

    apiVersion: v1
    kind: Pod
    metadata:
      creationTimestamp: "2026-08-31T05:30:36Z"
      generateName: c12-stale-lease-5b894c6649-
      generation: 1
      labels:
        app.kubernetes.io/managed-by: tilt
        app.kubernetes.io/name: c12-stale-lease
        hephaisto.chaos/fault: transient
        hephaisto.chaos/scenario: c12
        pod-template-hash: 5b894c6649
        tilt.dev/pod-template-hash: 9ee601ce5b5d80bf6533
      name: c12-stale-lease-5b894c6649-k22gg
      namespace: hephaisto-chaos
      ownerReferences:
      - apiVersion: apps/v1
        kind: ReplicaSet
        blockOwnerDeletion: true
        controller: true
        name: c12-stale-lease-5b894c6649
        uid: 9971e93c-e260-4ad7-a4ad-950f174701b7
      uid: 99e3c83d-30fe-465e-8bf3-976e8b38c57a
    spec:
      containers:
      - args:
        - |
          sleep 2
    
          # hostname inside a container is the POD name. Stable across container
          # restarts, different for a replacement pod. That is the whole hinge.
          me=$(hostname)
          holder=$(cat /data/lease 2>/dev/null || true)
    
          # First pod ever: take the lease, which is what makes it its own.
          if [ -z "$holder" ]; then
            echo "$me" > /data/lease
            holder=$me
          fi
    
          if [ "$holder" = "$me" ]; then
            echo "FATAL: lease at /data/lease is held by $holder, which is this pod's own name; refusing to re-take it"
            exit 1
          fi
    
          echo "lease at /data/lease is held by $holder; this pod is $me; acquired"
    
          # Stay up and Ready. Verification at T+60s, T+5m and T+15m asks the
          # workload whether it is settled, so this has to outlive all three.
          # Deliberately does NOT rewrite the lease: doing so would make this pod
          # its own holder, and the next container restart would fail again.
          while true; do sleep 30; done
        command:
        - /bin/sh
        - -c
        image: busybox:1.37
        imagePullPolicy: IfNotPresent
        name: app
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-nbgc9
          readOnly: true
      dnsPolicy: ClusterFirst
      enableServiceLinks: true
      nodeName: lima-rancher-desktop
      preemptionPolicy: PreemptLowerPriority
      priority: 0
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      serviceAccount: default
      serviceAccountName: default
      terminationGracePeriodSeconds: 1
      tolerations:
      - effect: NoExecute
        key: node.kubernetes.io/not-ready
        operator: Exists
        tolerationSeconds: 300
      - effect: NoExecute
        key: node.kubernetes.io/unreachable
        operator: Exists
        tolerationSeconds: 300
      volumes:
      - name: state
        persistentVolumeClaim:
          claimName: c12-stale-lease-state
      - name: kube-api-access-nbgc9
        projected:
          defaultMode: 420
          sources:
          - serviceAccountToken:
              expirationSeconds: 3607
              path: token
          - configMap:
              items:
              - key: ca.crt
                path: ca.crt
              name: kube-root-ca.crt
          - downwardAPI:
              items:
              - fieldRef:
                  apiVersion: v1
                  fieldPath: metadata.namespace
                path: namespace
    status:
      allocatedResources:
        cpu: 10m
        memory: 16Mi
      conditions:
      - lastTransitionTime: "2026-08-31T11:54:44Z"
        observedGeneration: 1
        status: "True"
        type: PodReadyToStartContainers
      - lastTransitionTime: "2026-08-31T05:30:39Z"
        observedGeneration: 1
        status: "True"
        type: Initialized
      - lastTransitionTime: "2026-08-31T13:07:21Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: Ready
      - lastTransitionTime: "2026-08-31T13:07:21Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: ContainersReady
      - lastTransitionTime: "2026-08-31T05:30:39Z"
        observedGeneration: 1
        status: "True"
        type: PodScheduled
      containerStatuses:
      - allocatedResources:
          cpu: 10m
          memory: 16Mi
        containerID: docker://76f288e146be088c064fd4728012b9d2c6b29b67d8dc1b4504de985388e62a86
        image: busybox:1.37
        imageID: docker-pullable://busybox@sha256:9db7b59979c38555a39def84a31fb98b5296952f9e3afd4f6f11f05b07adfab0
        lastState:
          terminated:
            containerID: docker://76f288e146be088c064fd4728012b9d2c6b29b67d8dc1b4504de985388e62a86
            exitCode: 1
            finishedAt: "2026-08-31T13:07:20Z"
            reason: Error
            startedAt: "2026-08-31T13:07:18Z"
        name: app
        ready: false
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        restartCount: 97
        started: false
        state:
          waiting:
            message: back-off 5m0s restarting failed container=app pod=c12-stale-lease-5b894c6649-k22gg_hephaisto-chaos(99e3c83d-30fe-465e-8bf3-976e8b38c57a)
            reason: CrashLoopBackOff
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-nbgc9
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-31T05:30:39Z"
    
    events for this pod:
    type     reason   count  objects                               first  last  message
    -------  -------  -----  ------------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff  71     Pod/c12-stale-lease-5b894c6649-k22gg  2m     2m    Back-off restarting failed container app in pod c12-stale-lease-5b894c6649-k22gg_hephaisto-chao…
    Normal   Pulled   19     Pod/c12-stale-lease-5b894c6649-k22gg  4m     4m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created  10     Pod/c12-stale-lease-5b894c6649-k22gg  50m    50m   Container created
    Normal   Started  9      Pod/c12-stale-lease-5b894c6649-k22gg  56m    56m   Container started
    

11. 11 llm model turn internal 5.1s · 25.7k tok · $0.0008

    model output — its reasoning, and the tools it asked for

    -> calls describe_pod

12. 12 tool describe_pod kubernetes 0ms · 6.3 KiB ~ truncated

    arguments

    {"name":"c12-stale-lease-5b894c6649-k22gg","namespace":"hephaisto-chaos"}

    result digest — what the model actually saw

    [step 01a05ef5-2514-7bc1-a222-61477c032b0b] describe_pod
    log digest: 204 lines, 6429 bytes
    
    -- repeated patterns --
    x7 [#61 .. #192]         cpu: 100m
    x6 [#122 .. #184]     observedGeneration: 1
    x5 [#65 .. #195]         memory: 16Mi
    x3 [#59 .. #190]     resources:
    x3 [#60 .. #191]       limits:
    x3 [#62 .. #193]         memory: 64Mi
    x3 [#63 .. #194]       requests:
    x3 [#123 .. #143]     status: "True"
    x2 [#1 .. #113] apiVersion: v1
    x2 [#22 .. #23]     uid: 9971e93c-e260-4ad7-a4ad-950f174701b7
    
    -- notable lines --
          fi
    
          if [ "$holder" = "$me" ]; then
            echo "FATAL: lease at /data/lease is held by $holder, which is this pod's own name; refusing to re-take it"
            exit 1
          fi
    
    
    -- last 40 lines --
          requests:
            cpu: 10m
            memory: 16Mi
        restartCount: 97
        started: false
        state:
          waiting:
            message: back-off 5m0s restarting failed container=app pod=c12-stale-lease-5b894c6649-k22gg_hephaisto-chaos(99e3c83d-30fe-465e-8bf3-976e8b38c57a)
            reason: CrashLoopBackOff
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-nbgc9
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-31T05:30:39Z"
    
    events for this pod:
    type     reason   count  objects                               first  last  message
    -------  -------  -----  ------------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff  71     Pod/c12-stale-lease-5b894c6649-k22gg  2m     2m    Back-off restarting failed container app in pod c12-stale-lease-5b894c6649-k22gg_hephaisto-chao…
    Normal   Pulled   19     Pod/c12-stale-lease-5b894c6649-k22gg  4m     4m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created  10     Pod/c12-stale-lease-5b894c6649-k22gg  50m    50m   Container created
    Normal   Started  9      Pod/c12-stale-lease-5b894c6649-k22gg  56m    56m   Container started
    
    [truncated: 147 of 204 lines omitted]
    

    raw result — the untruncated tool output (6.3 KiB)

    apiVersion: v1
    kind: Pod
    metadata:
      creationTimestamp: "2026-08-31T05:30:36Z"
      generateName: c12-stale-lease-5b894c6649-
      generation: 1
      labels:
        app.kubernetes.io/managed-by: tilt
        app.kubernetes.io/name: c12-stale-lease
        hephaisto.chaos/fault: transient
        hephaisto.chaos/scenario: c12
        pod-template-hash: 5b894c6649
        tilt.dev/pod-template-hash: 9ee601ce5b5d80bf6533
      name: c12-stale-lease-5b894c6649-k22gg
      namespace: hephaisto-chaos
      ownerReferences:
      - apiVersion: apps/v1
        kind: ReplicaSet
        blockOwnerDeletion: true
        controller: true
        name: c12-stale-lease-5b894c6649
        uid: 9971e93c-e260-4ad7-a4ad-950f174701b7
      uid: 99e3c83d-30fe-465e-8bf3-976e8b38c57a
    spec:
      containers:
      - args:
        - |
          sleep 2
    
          # hostname inside a container is the POD name. Stable across container
          # restarts, different for a replacement pod. That is the whole hinge.
          me=$(hostname)
          holder=$(cat /data/lease 2>/dev/null || true)
    
          # First pod ever: take the lease, which is what makes it its own.
          if [ -z "$holder" ]; then
            echo "$me" > /data/lease
            holder=$me
          fi
    
          if [ "$holder" = "$me" ]; then
            echo "FATAL: lease at /data/lease is held by $holder, which is this pod's own name; refusing to re-take it"
            exit 1
          fi
    
          echo "lease at /data/lease is held by $holder; this pod is $me; acquired"
    
          # Stay up and Ready. Verification at T+60s, T+5m and T+15m asks the
          # workload whether it is settled, so this has to outlive all three.
          # Deliberately does NOT rewrite the lease: doing so would make this pod
          # its own holder, and the next container restart would fail again.
          while true; do sleep 30; done
        command:
        - /bin/sh
        - -c
        image: busybox:1.37
        imagePullPolicy: IfNotPresent
        name: app
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-nbgc9
          readOnly: true
      dnsPolicy: ClusterFirst
      enableServiceLinks: true
      nodeName: lima-rancher-desktop
      preemptionPolicy: PreemptLowerPriority
      priority: 0
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      serviceAccount: default
      serviceAccountName: default
      terminationGracePeriodSeconds: 1
      tolerations:
      - effect: NoExecute
        key: node.kubernetes.io/not-ready
        operator: Exists
        tolerationSeconds: 300
      - effect: NoExecute
        key: node.kubernetes.io/unreachable
        operator: Exists
        tolerationSeconds: 300
      volumes:
      - name: state
        persistentVolumeClaim:
          claimName: c12-stale-lease-state
      - name: kube-api-access-nbgc9
        projected:
          defaultMode: 420
          sources:
          - serviceAccountToken:
              expirationSeconds: 3607
              path: token
          - configMap:
              items:
              - key: ca.crt
                path: ca.crt
              name: kube-root-ca.crt
          - downwardAPI:
              items:
              - fieldRef:
                  apiVersion: v1
                  fieldPath: metadata.namespace
                path: namespace
    status:
      allocatedResources:
        cpu: 10m
        memory: 16Mi
      conditions:
      - lastTransitionTime: "2026-08-31T11:54:44Z"
        observedGeneration: 1
        status: "True"
        type: PodReadyToStartContainers
      - lastTransitionTime: "2026-08-31T05:30:39Z"
        observedGeneration: 1
        status: "True"
        type: Initialized
      - lastTransitionTime: "2026-08-31T13:07:21Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: Ready
      - lastTransitionTime: "2026-08-31T13:07:21Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: ContainersReady
      - lastTransitionTime: "2026-08-31T05:30:39Z"
        observedGeneration: 1
        status: "True"
        type: PodScheduled
      containerStatuses:
      - allocatedResources:
          cpu: 10m
          memory: 16Mi
        containerID: docker://76f288e146be088c064fd4728012b9d2c6b29b67d8dc1b4504de985388e62a86
        image: busybox:1.37
        imageID: docker-pullable://busybox@sha256:9db7b59979c38555a39def84a31fb98b5296952f9e3afd4f6f11f05b07adfab0
        lastState:
          terminated:
            containerID: docker://76f288e146be088c064fd4728012b9d2c6b29b67d8dc1b4504de985388e62a86
            exitCode: 1
            finishedAt: "2026-08-31T13:07:20Z"
            reason: Error
            startedAt: "2026-08-31T13:07:18Z"
        name: app
        ready: false
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        restartCount: 97
        started: false
        state:
          waiting:
            message: back-off 5m0s restarting failed container=app pod=c12-stale-lease-5b894c6649-k22gg_hephaisto-chaos(99e3c83d-30fe-465e-8bf3-976e8b38c57a)
            reason: CrashLoopBackOff
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-nbgc9
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-31T05:30:39Z"
    
    events for this pod:
    type     reason   count  objects                               first  last  message
    -------  -------  -----  ------------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff  71     Pod/c12-stale-lease-5b894c6649-k22gg  2m     2m    Back-off restarting failed container app in pod c12-stale-lease-5b894c6649-k22gg_hephaisto-chao…
    Normal   Pulled   19     Pod/c12-stale-lease-5b894c6649-k22gg  4m     4m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created  10     Pod/c12-stale-lease-5b894c6649-k22gg  50m    50m   Container created
    Normal   Started  9      Pod/c12-stale-lease-5b894c6649-k22gg  56m    56m   Container started
    

13. 13 llm model turn internal 6.8s · 26.7k tok · $0.0008

    model output — its reasoning, and the tools it asked for

    -> calls describe_pod

14. 14 tool describe_pod kubernetes 0ms · 6.3 KiB ~ truncated

    arguments

    {"name":"c12-stale-lease-5b894c6649-k22gg","namespace":"hephaisto-chaos"}

    result digest — what the model actually saw

    [step 01a05ef5-3f8b-70c1-8a11-f1c34f1c621c] describe_pod
    log digest: 204 lines, 6429 bytes
    
    -- repeated patterns --
    x7 [#61 .. #192]         cpu: 100m
    x6 [#122 .. #184]     observedGeneration: 1
    x5 [#65 .. #195]         memory: 16Mi
    x3 [#59 .. #190]     resources:
    x3 [#60 .. #191]       limits:
    x3 [#62 .. #193]         memory: 64Mi
    x3 [#63 .. #194]       requests:
    x3 [#123 .. #143]     status: "True"
    x2 [#1 .. #113] apiVersion: v1
    x2 [#22 .. #23]     uid: 9971e93c-e260-4ad7-a4ad-950f174701b7
    
    -- notable lines --
          fi
    
          if [ "$holder" = "$me" ]; then
            echo "FATAL: lease at /data/lease is held by $holder, which is this pod's own name; refusing to re-take it"
            exit 1
          fi
    
    
    -- last 40 lines --
          requests:
            cpu: 10m
            memory: 16Mi
        restartCount: 97
        started: false
        state:
          waiting:
            message: back-off 5m0s restarting failed container=app pod=c12-stale-lease-5b894c6649-k22gg_hephaisto-chaos(99e3c83d-30fe-465e-8bf3-976e8b38c57a)
            reason: CrashLoopBackOff
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-nbgc9
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-31T05:30:39Z"
    
    events for this pod:
    type     reason   count  objects                               first  last  message
    -------  -------  -----  ------------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff  71     Pod/c12-stale-lease-5b894c6649-k22gg  2m     2m    Back-off restarting failed container app in pod c12-stale-lease-5b894c6649-k22gg_hephaisto-chao…
    Normal   Pulled   19     Pod/c12-stale-lease-5b894c6649-k22gg  4m     4m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created  10     Pod/c12-stale-lease-5b894c6649-k22gg  50m    50m   Container created
    Normal   Started  9      Pod/c12-stale-lease-5b894c6649-k22gg  56m    56m   Container started
    
    [truncated: 147 of 204 lines omitted]
    

    raw result — the untruncated tool output (6.3 KiB)

    apiVersion: v1
    kind: Pod
    metadata:
      creationTimestamp: "2026-08-31T05:30:36Z"
      generateName: c12-stale-lease-5b894c6649-
      generation: 1
      labels:
        app.kubernetes.io/managed-by: tilt
        app.kubernetes.io/name: c12-stale-lease
        hephaisto.chaos/fault: transient
        hephaisto.chaos/scenario: c12
        pod-template-hash: 5b894c6649
        tilt.dev/pod-template-hash: 9ee601ce5b5d80bf6533
      name: c12-stale-lease-5b894c6649-k22gg
      namespace: hephaisto-chaos
      ownerReferences:
      - apiVersion: apps/v1
        kind: ReplicaSet
        blockOwnerDeletion: true
        controller: true
        name: c12-stale-lease-5b894c6649
        uid: 9971e93c-e260-4ad7-a4ad-950f174701b7
      uid: 99e3c83d-30fe-465e-8bf3-976e8b38c57a
    spec:
      containers:
      - args:
        - |
          sleep 2
    
          # hostname inside a container is the POD name. Stable across container
          # restarts, different for a replacement pod. That is the whole hinge.
          me=$(hostname)
          holder=$(cat /data/lease 2>/dev/null || true)
    
          # First pod ever: take the lease, which is what makes it its own.
          if [ -z "$holder" ]; then
            echo "$me" > /data/lease
            holder=$me
          fi
    
          if [ "$holder" = "$me" ]; then
            echo "FATAL: lease at /data/lease is held by $holder, which is this pod's own name; refusing to re-take it"
            exit 1
          fi
    
          echo "lease at /data/lease is held by $holder; this pod is $me; acquired"
    
          # Stay up and Ready. Verification at T+60s, T+5m and T+15m asks the
          # workload whether it is settled, so this has to outlive all three.
          # Deliberately does NOT rewrite the lease: doing so would make this pod
          # its own holder, and the next container restart would fail again.
          while true; do sleep 30; done
        command:
        - /bin/sh
        - -c
        image: busybox:1.37
        imagePullPolicy: IfNotPresent
        name: app
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-nbgc9
          readOnly: true
      dnsPolicy: ClusterFirst
      enableServiceLinks: true
      nodeName: lima-rancher-desktop
      preemptionPolicy: PreemptLowerPriority
      priority: 0
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      serviceAccount: default
      serviceAccountName: default
      terminationGracePeriodSeconds: 1
      tolerations:
      - effect: NoExecute
        key: node.kubernetes.io/not-ready
        operator: Exists
        tolerationSeconds: 300
      - effect: NoExecute
        key: node.kubernetes.io/unreachable
        operator: Exists
        tolerationSeconds: 300
      volumes:
      - name: state
        persistentVolumeClaim:
          claimName: c12-stale-lease-state
      - name: kube-api-access-nbgc9
        projected:
          defaultMode: 420
          sources:
          - serviceAccountToken:
              expirationSeconds: 3607
              path: token
          - configMap:
              items:
              - key: ca.crt
                path: ca.crt
              name: kube-root-ca.crt
          - downwardAPI:
              items:
              - fieldRef:
                  apiVersion: v1
                  fieldPath: metadata.namespace
                path: namespace
    status:
      allocatedResources:
        cpu: 10m
        memory: 16Mi
      conditions:
      - lastTransitionTime: "2026-08-31T11:54:44Z"
        observedGeneration: 1
        status: "True"
        type: PodReadyToStartContainers
      - lastTransitionTime: "2026-08-31T05:30:39Z"
        observedGeneration: 1
        status: "True"
        type: Initialized
      - lastTransitionTime: "2026-08-31T13:07:21Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: Ready
      - lastTransitionTime: "2026-08-31T13:07:21Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: ContainersReady
      - lastTransitionTime: "2026-08-31T05:30:39Z"
        observedGeneration: 1
        status: "True"
        type: PodScheduled
      containerStatuses:
      - allocatedResources:
          cpu: 10m
          memory: 16Mi
        containerID: docker://76f288e146be088c064fd4728012b9d2c6b29b67d8dc1b4504de985388e62a86
        image: busybox:1.37
        imageID: docker-pullable://busybox@sha256:9db7b59979c38555a39def84a31fb98b5296952f9e3afd4f6f11f05b07adfab0
        lastState:
          terminated:
            containerID: docker://76f288e146be088c064fd4728012b9d2c6b29b67d8dc1b4504de985388e62a86
            exitCode: 1
            finishedAt: "2026-08-31T13:07:20Z"
            reason: Error
            startedAt: "2026-08-31T13:07:18Z"
        name: app
        ready: false
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        restartCount: 97
        started: false
        state:
          waiting:
            message: back-off 5m0s restarting failed container=app pod=c12-stale-lease-5b894c6649-k22gg_hephaisto-chaos(99e3c83d-30fe-465e-8bf3-976e8b38c57a)
            reason: CrashLoopBackOff
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-nbgc9
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-31T05:30:39Z"
    
    events for this pod:
    type     reason   count  objects                               first  last  message
    -------  -------  -----  ------------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff  71     Pod/c12-stale-lease-5b894c6649-k22gg  2m     2m    Back-off restarting failed container app in pod c12-stale-lease-5b894c6649-k22gg_hephaisto-chao…
    Normal   Pulled   19     Pod/c12-stale-lease-5b894c6649-k22gg  4m     4m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created  10     Pod/c12-stale-lease-5b894c6649-k22gg  50m    50m   Container created
    Normal   Started  9      Pod/c12-stale-lease-5b894c6649-k22gg  56m    56m   Container started
    

15. 15 llm model turn internal 6.4s · 27.5k tok · $0.0009

    model output — its reasoning, and the tools it asked for

    -> calls describe_pod

16. 16 tool describe_pod kubernetes 0ms · 6.3 KiB ~ truncated

    arguments

    {"name":"c12-stale-lease-5b894c6649-k22gg","namespace":"hephaisto-chaos"}

    result digest — what the model actually saw

    [step 01a05ef5-5865-71a5-89a2-80650906d4ad] describe_pod
    log digest: 204 lines, 6429 bytes
    
    -- repeated patterns --
    x7 [#61 .. #192]         cpu: 100m
    x6 [#122 .. #184]     observedGeneration: 1
    x5 [#65 .. #195]         memory: 16Mi
    x3 [#59 .. #190]     resources:
    x3 [#60 .. #191]       limits:
    x3 [#62 .. #193]         memory: 64Mi
    x3 [#63 .. #194]       requests:
    x3 [#123 .. #143]     status: "True"
    x2 [#1 .. #113] apiVersion: v1
    x2 [#22 .. #23]     uid: 9971e93c-e260-4ad7-a4ad-950f174701b7
    
    -- notable lines --
          fi
    
          if [ "$holder" = "$me" ]; then
            echo "FATAL: lease at /data/lease is held by $holder, which is this pod's own name; refusing to re-take it"
            exit 1
          fi
    
    
    -- last 40 lines --
          requests:
            cpu: 10m
            memory: 16Mi
        restartCount: 97
        started: false
        state:
          waiting:
            message: back-off 5m0s restarting failed container=app pod=c12-stale-lease-5b894c6649-k22gg_hephaisto-chaos(99e3c83d-30fe-465e-8bf3-976e8b38c57a)
            reason: CrashLoopBackOff
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-nbgc9
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-31T05:30:39Z"
    
    events for this pod:
    type     reason   count  objects                               first  last  message
    -------  -------  -----  ------------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff  71     Pod/c12-stale-lease-5b894c6649-k22gg  2m     2m    Back-off restarting failed container app in pod c12-stale-lease-5b894c6649-k22gg_hephaisto-chao…
    Normal   Pulled   19     Pod/c12-stale-lease-5b894c6649-k22gg  4m     4m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created  10     Pod/c12-stale-lease-5b894c6649-k22gg  50m    50m   Container created
    Normal   Started  9      Pod/c12-stale-lease-5b894c6649-k22gg  56m    56m   Container started
    
    [truncated: 147 of 204 lines omitted]
    

    raw result — the untruncated tool output (6.3 KiB)

    apiVersion: v1
    kind: Pod
    metadata:
      creationTimestamp: "2026-08-31T05:30:36Z"
      generateName: c12-stale-lease-5b894c6649-
      generation: 1
      labels:
        app.kubernetes.io/managed-by: tilt
        app.kubernetes.io/name: c12-stale-lease
        hephaisto.chaos/fault: transient
        hephaisto.chaos/scenario: c12
        pod-template-hash: 5b894c6649
        tilt.dev/pod-template-hash: 9ee601ce5b5d80bf6533
      name: c12-stale-lease-5b894c6649-k22gg
      namespace: hephaisto-chaos
      ownerReferences:
      - apiVersion: apps/v1
        kind: ReplicaSet
        blockOwnerDeletion: true
        controller: true
        name: c12-stale-lease-5b894c6649
        uid: 9971e93c-e260-4ad7-a4ad-950f174701b7
      uid: 99e3c83d-30fe-465e-8bf3-976e8b38c57a
    spec:
      containers:
      - args:
        - |
          sleep 2
    
          # hostname inside a container is the POD name. Stable across container
          # restarts, different for a replacement pod. That is the whole hinge.
          me=$(hostname)
          holder=$(cat /data/lease 2>/dev/null || true)
    
          # First pod ever: take the lease, which is what makes it its own.
          if [ -z "$holder" ]; then
            echo "$me" > /data/lease
            holder=$me
          fi
    
          if [ "$holder" = "$me" ]; then
            echo "FATAL: lease at /data/lease is held by $holder, which is this pod's own name; refusing to re-take it"
            exit 1
          fi
    
          echo "lease at /data/lease is held by $holder; this pod is $me; acquired"
    
          # Stay up and Ready. Verification at T+60s, T+5m and T+15m asks the
          # workload whether it is settled, so this has to outlive all three.
          # Deliberately does NOT rewrite the lease: doing so would make this pod
          # its own holder, and the next container restart would fail again.
          while true; do sleep 30; done
        command:
        - /bin/sh
        - -c
        image: busybox:1.37
        imagePullPolicy: IfNotPresent
        name: app
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-nbgc9
          readOnly: true
      dnsPolicy: ClusterFirst
      enableServiceLinks: true
      nodeName: lima-rancher-desktop
      preemptionPolicy: PreemptLowerPriority
      priority: 0
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      serviceAccount: default
      serviceAccountName: default
      terminationGracePeriodSeconds: 1
      tolerations:
      - effect: NoExecute
        key: node.kubernetes.io/not-ready
        operator: Exists
        tolerationSeconds: 300
      - effect: NoExecute
        key: node.kubernetes.io/unreachable
        operator: Exists
        tolerationSeconds: 300
      volumes:
      - name: state
        persistentVolumeClaim:
          claimName: c12-stale-lease-state
      - name: kube-api-access-nbgc9
        projected:
          defaultMode: 420
          sources:
          - serviceAccountToken:
              expirationSeconds: 3607
              path: token
          - configMap:
              items:
              - key: ca.crt
                path: ca.crt
              name: kube-root-ca.crt
          - downwardAPI:
              items:
              - fieldRef:
                  apiVersion: v1
                  fieldPath: metadata.namespace
                path: namespace
    status:
      allocatedResources:
        cpu: 10m
        memory: 16Mi
      conditions:
      - lastTransitionTime: "2026-08-31T11:54:44Z"
        observedGeneration: 1
        status: "True"
        type: PodReadyToStartContainers
      - lastTransitionTime: "2026-08-31T05:30:39Z"
        observedGeneration: 1
        status: "True"
        type: Initialized
      - lastTransitionTime: "2026-08-31T13:07:21Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: Ready
      - lastTransitionTime: "2026-08-31T13:07:21Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: ContainersReady
      - lastTransitionTime: "2026-08-31T05:30:39Z"
        observedGeneration: 1
        status: "True"
        type: PodScheduled
      containerStatuses:
      - allocatedResources:
          cpu: 10m
          memory: 16Mi
        containerID: docker://76f288e146be088c064fd4728012b9d2c6b29b67d8dc1b4504de985388e62a86
        image: busybox:1.37
        imageID: docker-pullable://busybox@sha256:9db7b59979c38555a39def84a31fb98b5296952f9e3afd4f6f11f05b07adfab0
        lastState:
          terminated:
            containerID: docker://76f288e146be088c064fd4728012b9d2c6b29b67d8dc1b4504de985388e62a86
            exitCode: 1
            finishedAt: "2026-08-31T13:07:20Z"
            reason: Error
            startedAt: "2026-08-31T13:07:18Z"
        name: app
        ready: false
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        restartCount: 97
        started: false
        state:
          waiting:
            message: back-off 5m0s restarting failed container=app pod=c12-stale-lease-5b894c6649-k22gg_hephaisto-chaos(99e3c83d-30fe-465e-8bf3-976e8b38c57a)
            reason: CrashLoopBackOff
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-nbgc9
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-31T05:30:39Z"
    
    events for this pod:
    type     reason   count  objects                               first  last  message
    -------  -------  -----  ------------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff  71     Pod/c12-stale-lease-5b894c6649-k22gg  2m     2m    Back-off restarting failed container app in pod c12-stale-lease-5b894c6649-k22gg_hephaisto-chao…
    Normal   Pulled   19     Pod/c12-stale-lease-5b894c6649-k22gg  4m     4m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created  10     Pod/c12-stale-lease-5b894c6649-k22gg  50m    50m   Container created
    Normal   Started  9      Pod/c12-stale-lease-5b894c6649-k22gg  56m    56m   Container started
    

17. 17 llm model turn internal 5.6s · 28.4k tok · $0.0009

    model output — its reasoning, and the tools it asked for

    -> calls list_pvcs

18. 18 tool list_pvcs kubernetes 0ms · 648 B

    arguments

    {"namespace":"hephaisto-chaos"}

    result digest — what the model actually saw

    [step 01a05ef5-6e6c-77ae-b7ad-4a07a557aeeb] list_pvcs
    log digest: 5 lines, 648 bytes
    
    -- last 5 lines --
    name                   phase    capacity  requested  access modes   storageclass  volume                                    age
    ---------------------  -------  --------  ---------  -------------  ------------  ----------------------------------------  -----
    c11-transient-state    Pending  -         64Mi       ReadWriteOnce  local-path    -                                         7h59m
    c12-stale-lease-state  Bound    64Mi      64Mi       ReadWriteOnce  local-path    pvc-26f0084e-9488-4710-a391-a3922651e99c  7h59m
    c6-diskfill-data       Pending  -         1Gi        ReadWriteOnce  local-path    -                                         7h59m
    

19. 19 llm model turn internal 13.5s · 29.1k tok · $0.0010

    model output — its reasoning, and the tools it asked for

    -> calls conclude

20. 20 tool conclude internal 0ms · 129 B x failed

    x The arguments dictionary is missing a value for the required parameter 'request'. (Parameter 'arguments')

    arguments

    {"findings":[{"category":"application","confidence":0.95,"evidence":[{"excerpt":"2026-08-31T13:07:20.961082684Z FATAL: lease at /data/lease is held by c12-stale-lease-5b894c6649-k22gg, which is this pod\u0027s own name; refusing to re-take it","step_id":"01a05ef4-cf0f-79ef-a6d9-aef7608f79b9"},{"excerpt":"if [ \u0022$holder\u0022 = \u0022$me\u0022 ]; then\n        echo \u0022FATAL: lease at /data/lease is held by $holder, which is this pod\u0027s own name; refusing to re-take it\u0022\n        exit 1","step_id":"01a05ef4-dc94-7f58-b66c-540592c334ef"},{"excerpt":"c12-stale-lease-state  Bound    64Mi      64Mi       ReadWriteOnce  local-path    pvc-26f0084e-9488-4710-a391-a3922651e99c","step_id":"01a05ef5-6e6c-77ae-b7ad-4a07a557aeeb"}],"hypothesis":"The container exits because its startup script detects a stale lease file on the persisted volume that claims ownership by this pod\u0027s own name, and aborts with exit code 1."}],"summary":"The CrashLoopBackOff is caused by the pod\u0027s own lease file persisting on a PVC. On each restart the script sees the lease held by its own name and exits with error, leading to repeated crashes. Removing the stale lease (or using an emptyDir or fixing the script) will break the loop."}

    result digest — what the model actually saw

    [step 01a05ef5-a301-7230-a086-bc8cc3057287] conclude
    log digest: 1 lines, 129 bytes
    
    -- last 1 lines --
    ERROR: conclude failed: The arguments dictionary is missing a value for the required parameter 'request'. (Parameter 'arguments')
    

21. 21 llm model turn internal 9.0s · 29.3k tok · $0.0009

    model output — its reasoning, and the tools it asked for

    -> calls conclude

22. 22 tool conclude internal 0ms · 141 B

    arguments

    {"request":{"findings":[{"category":"application","confidence":0.95,"evidence":[{"excerpt":"2026-08-31T13:07:20.961082684Z FATAL: lease at /data/lease is held by c12-stale-lease-5b894c6649-k22gg, which is this pod\u0027s own name; refusing to re-take it","step_id":"01a05ef4-cf0f-79ef-a6d9-aef7608f79b9"},{"excerpt":"if [ \u0022$holder\u0022 = \u0022$me\u0022 ]; then\n        echo \u0022FATAL: lease at /data/lease is held by $holder, which is this pod\u0027s own name; refusing to re-take it\u0022\n        exit 1","step_id":"01a05ef4-dc94-7f58-b66c-540592c334ef"},{"excerpt":"c12-stale-lease-state  Bound    64Mi      64Mi       ReadWriteOnce  local-path    pvc-26f0084e-9488-4710-a391-a3922651e99c","step_id":"01a05ef5-6e6c-77ae-b7ad-4a07a557aeeb"}],"hypothesis":"The container exits because its startup script detects a stale lease file on the persisted volume that claims ownership by this pod\u0027s own name, and aborts with exit code 1."}],"summary":"The CrashLoopBackOff is caused by the pod\u0027s own lease file persisting on a PVC. On each restart the script sees the lease held by its own name and exits with error, leading to repeated crashes. Removing the stale lease (or using an emptyDir or fixing the script) will break the loop."}}

    result digest — what the model actually saw

    [step 01a05ef5-c642-73d6-89ba-5ca42b144f31] conclude
    log digest: 1 lines, 141 bytes
    
    -- last 1 lines --
    Conclusion recorded. Your citations are now checked against what the tools actually returned; any that do not match are discarded. Stop here.
    

23. 23 llm model turn internal 7.9s · 29.7k tok · $0.0009

    model output — its reasoning, and the tools it asked for

    **Findings**
    
    | Category | Confidence | Hypothesis | Evidence |
    |----------|------------|------------|----------|
    | application | 0.95 | The container exits because its startup script detects a stale lease file on the persisted volume that claims ownership by this pod’s own name, and aborts with exit code 1. | • `2026-08-31T13:07:20.961082684Z FATAL: lease at /data/lease is held by c12-stale-lease-5b894c6649‑k22gg, which is this pod's own name; refusing to re-take it` (previous container logs) <br>• Script fragment in the pod spec shows the check that prints the same fatal message and exits with code 1. <br>• PVC `c12-stale-lease-state` is **Bound** and provides a 64 Mi persistent volume where the lease file resides. |
    
    **Summary**
    
    The CrashLoopBackOff is caused by the pod’s own lease file persisting on its PVC. On each restart the entry‑point script reads `/data/lease`, sees that it is already held by this pod’s name, logs a fatal message and exits with status 1. The container therefore never becomes ready, leading to repeated restarts.
    
    **Remediation**
    
    Delete or reset the stale lease file (e.g., `kubectl exec` into a running replica of the pod or delete the PVC if it can be recreated) or modify the script to ignore an existing lease when the pod is starting fresh. Using an `emptyDir` instead of a PVC for the lease would also avoid the problem, as the stale file would not survive restarts.

24. 24 llm model turn internal 37.1s · 20.8k tok · $0.0006

    model output — its reasoning, and the tools it asked for

    {
      "summary": "The CrashLoopBackOff is caused by a stale lease file stored on a PersistentVolumeClaim, which persists across pod restarts. Restarting the pod would not clear this state, and the only fix (removing or fixing the lease) requires manual intervention.",
      "no_action_required": true,
      "actions": []
    }

findings 1

plan

The CrashLoopBackOff is caused by a stale lease file stored on a PersistentVolumeClaim, which persists across pod restarts. Restarting the pod would not clear this state, and the only fix (removing or fixing the lease) requires manual intervention.

No action was proposed. The planner set no_action_required — which is the expected outcome for most incidents, and what the planning prompt tells it to default to.