ubuntu - core dump size 0 in kubernetes pod

Question

I have set my K8s Node's core_pattern to kernel.core_pattern=/tmp/core-%e.%p.%h.%t. Since that was the only way I was able to get the pods to change its core_pattern. But, now I the cores I generate using kill -6 , the core file generated is always of size 0. Same thing works in just the docker environment, but not able to get it to work in k8s pods.

I am running container on ubuntu 18.04LTS.

-rw------- 1 nobody nogroup 0 Feb  5 02:10 /tmp/core*

I have tried the following:

ulimit -c unlimited
sysctl -w kernel.core_pattern=/tmp/core-%e.%p.%h.%t

Also:

echo 'root - core unlimited' >> /etc/security/limits.conf
echo '*    - core unlimited' >> /etc/security/limits.conf
echo 'kernel.core_pattern=/tmp/core-%e.%p.%h.%t' >> /etc/sysctl.conf

Any idea how I can fix it?

question from:https://stackoverflow.com/questions/66056694/core-dump-size-0-in-kubernetes-pod

Answer 1

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