How to generate coredump for containers running with k8s

ShuangLu

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Apr 21, 2019

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1. Login into the machine running the container and change the output of dump file to the 'tmp/cores/' inside the container
   echo "/tmp/cores/core.%p" > /proc/sys/kernel/core_pattern2. Create yaml file to deploy pod. 
Demo.yaml
apiVersion: v1
kind: Pod
metadata:
  name: core-volume
spec:
  nodeSelector:
    kubernetes.io/hostname: <hostname>
  volumes:
  - name: core-path
    hostPath:
      path: /home/core-dump
  containers:
  - name: ubuntu
    image: ubuntu:12.04
    command: ["/bin/sleep","3600"]
    volumeMounts:
    - mountPath: /tmp/cores
      name: core-pathmount the host path '/home/core-dump' to the '/tmp/cores'3. Create & login to the container. Manually abort the terminal.kill -s SIGSEGV $$4. Login to the host machine to check if the dump has been created
ls /home/core-dumpReference: 
https://blog.csdn.net/u013774469/article/details/82595988