How do I access npm log files in GKE?-CodePudding

I'm running different nodejs microservices on Google Kubernetes Services. Sometimes these services crash and according to Cloud Logging, I can find detailed information in a logging file. For example, the logging message says

{
  "textPayload": "npm ERR!     /root/.npm/_logs/2021-10-27T11_26_28_534Z-debug.log\n",
  "insertId": "zoqxk8wvkuofhslm",
  "resource": {
    "type": "k8s_container",
    "labels": {
      "pod_name": "client-depl-7f679c6b49-5d9tz",
      "container_name": "client",
      "namespace_name": "production",
      "cluster_name": "cluster-1",
      "location": "europe-west3-a",
      "project_id": "XXX"
    }
  },
  "timestamp": "2021-10-27T11:26:28.701252670Z",
  "severity": "ERROR",
  "labels": {
    "k8s-pod/app": "client",
    "k8s-pod/skaffold_dev/run-id": "b5518659-05d6-4c08-9b55-9d58fdd5807f",
    "k8s-pod/pod-template-hash": "7f679c6b49",
    "compute.googleapis.com/resource_name": "gke-cluster-1-pool-1-8bfc60b2-ag86",
    "k8s-pod/app_kubernetes_io/managed-by": "skaffold"
  },
  "logName": "projects/xxx-productive/logs/stderr",
  "receiveTimestamp": "xxx"
}

Where do I find these logs on Google Cloud Platform?

---------------- Edit 2021.10.28 ---------------------------

I should clarify that I am already using the logs explorer. This is what I see there:

The logs show 7 consecutive error entries about npm failing. The last two entries indicate that there are more information in a log file "/root/.npm/_logs/2021-10-27T11_26_28_534Z-debug.log". Does this log file has more info about the failure or is all the info I get in these 7 error log entries?

Thanks

CodePudding user response：

kubectl logs <your_pod>
You can use GCP Logs Explorer

CodePudding user response：

Assuming you already Enable Logging and Monitoring, You can view logs on:

a. Go to the Logs explorer in the Cloud Console.

b. Click Resource. Under ALL_RESOURCE_TYPES, select Kubernetes Container.

c. Under CLUSTER_NAME, select the name of your user cluster.

d. Under NAMESPACE_NAME, select default.

e. Click Add and then click Run Query.

f. Under Query results, you can see log entries from the monitoring-example Deployment. For example:

{ "textPayload": "2020/11/14 01:24:24 Starting to listen on :9090\n",
"insertId": "1oa4vhg3qfxidt",
"resource": {
"type": "k8s_container",
"labels": {
"pod_name": "monitoring-example-7685d96496-xqfsf",
"cluster_name": ...,
"namespace_name": "default",
"project_id": ...,
"location": "us-west1",
"container_name": "prometheus-example-exporter"
}
}, "timestamp": "2020-11-14T01:24:24.358600252Z",
"labels": {
"k8s-pod/pod-template-hash": "7685d96496",
"k8s-pod/app": "monitoring-example"
},
"logName": "projects/.../logs/stdout",
"receiveTimestamp": "2020-11-14T01:24:39.562864735Z"
}

CodePudding user response：

How about

log into the pod while it is alive

kubectl exec -it your-pod -- sh
wait for it to crash and watch the crash file in real time while the pod is not restarted yet :)