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javakubernetesout-of-memorykubernetes-podheap-dump

How could be memory dump saved in kubernetes cluster after crashing?

When JVM crashes with OutOfMemoryError there are some options to store a dump:

-XX:+HeapDumpOnOutOfMemoryError 
-XX:HeapDumpPath=./java_pid<pid>.hprof

but what does it happen in kubernetes cluster after crashing? It seems kubernetes will clean up everything related to the pod crushed? How can I save it?

Solution

  • just mount it as a volume.

    volumeMounts:
        - name: heap-dumps
          mountPath: /dumps
      volumes:
      - name: heap-dumps
        emptyDir: {}

    How to do a java heap dump in K8s