Détection d'événements Kubernetes OOMKilled dans les journaux GKE

Je voudrais configurer une instrumentation pour les événements OOMKilled, qui ressemblent à ceci lors de l'examen d'un pod:

Name:   pnovotnak-manhole-123456789-82l2h
Namespace:  test
Node:   test-cluster-cja8smaK-oQSR/10.x.x.x
Start Time: Fri, 03 Feb 2017 14:34:57 -0800
Labels:   pod-template-hash=123456789
    run=pnovotnak-manhole
Status:   Running
IP:   10.x.x.x
Controllers:  ReplicaSet/pnovotnak-manhole-123456789
Containers:
  pnovotnak-manhole:
    Container ID: docker://...
    Image:    pnovotnak/it
    Image ID:   docker://sha256:...
    Port:
    Limits:
      cpu:  2
      memory: 3Gi
    Requests:
      cpu:    200m
      memory:   256Mi
    State:    Running
      Started:    Fri, 03 Feb 2017 14:41:12 -0800
    Last State:   Terminated
      Reason:   OOMKilled
      Exit Code:  137
      Started:    Fri, 03 Feb 2017 14:35:08 -0800
      Finished:   Fri, 03 Feb 2017 14:41:11 -0800
    Ready:    True
    Restart Count:  1
    Volume Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-tder (ro)
    Environment Variables:  <none>
Conditions:
  Type    Status
  Initialized   True
  Ready   True
  PodScheduled  True
Volumes:
  default-token-46euo:
    Type: Secret (a volume populated by a Secret)
    SecretName: default-token-tder
QoS Class:  Burstable
Tolerations:  <none>
Events:
  FirstSeen LastSeen  Count From                SubObjectPath       Type    Reason    Message
  --------- --------  ----- ----                -------------       --------  ------    -------
  11m   11m   1 {default-scheduler }                      Normal    Scheduled Successfully assigned pnovotnak-manhole-123456789-82l2h to test-cluster-cja8smaK-oQSR
  10m   10m   1 {kubelet test-cluster-cja8smaK-oQSR} spec.containers{pnovotnak-manhole}  Normal    Created   Created container with docker id xxxxxxxxxxxx; Security:[seccomp=unconfined]
  10m   10m   1 {kubelet test-cluster-cja8smaK-oQSR} spec.containers{pnovotnak-manhole}  Normal    Started   Started container with docker id xxxxxxxxxxxx
  11m   4m    2 {kubelet test-cluster-cja8smaK-oQSR} spec.containers{pnovotnak-manhole}  Normal    Pulling   pulling image "pnovotnak/it"
  10m   4m    2 {kubelet test-cluster-cja8smaK-oQSR} spec.containers{pnovotnak-manhole}  Normal    Pulled    Successfully pulled image "pnovotnak/it"
  4m    4m    1 {kubelet test-cluster-cja8smaK-oQSR} spec.containers{pnovotnak-manhole}  Normal    Created   Created container with docker id yyyyyyyyyyyy; Security:[seccomp=unconfined]
  4m    4m    1 {kubelet test-cluster-cja8smaK-oQSR} spec.containers{pnovotnak-manhole}  Normal    Started   Started container with docker id yyyyyyyyyyyy

Tout ce que je reçois des journaux de pod est;

{
 textPayload: "shutting down, got signal: Terminated
"
 insertId: "aaaaaaaaaaaaaaaa"
 resource: {
  type: "container"
  labels: {
   pod_id: "pnovotnak-manhole-123456789-82l2h"
   ...
  }
 }
 timestamp: "2017-02-03T22:34:48Z"
 severity: "ERROR"
 labels: {
  container.googleapis.com/container_name: "POD"
  ...
 }
 logName: "projects/myproj/logs/POD"
}

Et les journaux kublet;

{
 insertId: "bbbbbbbbbbbbbb"   
 jsonPayload: {
  _BOOT_ID: "ffffffffffffffffffffffffffffffff"    
  MESSAGE: "I0203 22:41:11.925928    1843 kubelet.go:1816] SyncLoop (PLEG): "pnovotnak-manhole-123456789-82l2h_test(a-uuid)", event: &pleg.PodLifecycleEvent{ID:"another-uuid", Type:"ContainerDied", Data:"..."}"
 ...

Ce qui ne semble pas suffisant pour l'identifier de manière unique en tant qu'événement OOM. D'autres idées?

Bien que l'événement OOMKilled ne soit pas présent dans les journaux, si vous pouvez détecter qu'un pod a été tué, vous pouvez ensuite l'utiliser kubectl get pod -o go-template=... <pod-id>pour déterminer la raison. Comme exemple directement à partir des documents :

[13:59:01] $ ./cluster/kubectl.sh  get pod -o go-template='{{range.status.containerStatuses}}{{"Container Name: "}}{{.name}}{{"\r\nLastState: "}}{{.lastState}}{{end}}'  simmemleak-60xbc
Container Name: simmemleak
LastState: map[terminated:map[exitCode:137 reason:OOM Killed startedAt:2015-07-07T20:58:43Z finishedAt:2015-07-07T20:58:43Z containerID:docker://0e4095bba1feccdfe7ef9fb6ebffe972b4b14285d5acdec6f0d3ae8a22fad8b2]]

Si vous effectuez cette opération par programme, une meilleure alternative à kubectlla fiabilité des résultats consiste à utiliser la GET /api/v1/podsméthode API REST Kubernetes . Les méthodes d'accès à l'API sont également données dans la documentation .