node-problem-detector not able to detect kernel log events for a Kind cluster

kubernetes / node-problem-detector

This is a place for various problem detectors running on the Kubernetes nodes.

Apache License 2.0

2.85k stars 616 forks source link

node-problem-detector not able to detect kernel log events for a Kind cluster #859

Open pravarag opened 5 months ago

pravarag commented 5 months ago

I've been trying to run node-problem-detector on a local kind cluster with 3 nodes (1 master, 2 worker). And after installing it as DaemonSet, firstly I'm seeing there are three pods running across three nodes including master. And also, when I pass any Kernel message as test, I don't see any events getting generated either in npd pod nor in the node's description.

wangzhen127 commented 3 months ago

You may need to tune your daemonset yaml

Update the node selector to ignore master, or remove the node-problem-detector label on master. https://github.com/kubernetes/node-problem-detector/blob/13b65d06e9513e82a6cad649988f33dd10f92f29/deployment/node-problem-detector.yaml#L11
For watching kernel messages, it depends on how your NPD is configured in the daemonset. https://github.com/kubernetes/node-problem-detector/blob/13b65d06e9513e82a6cad649988f33dd10f92f29/deployment/node-problem-detector.yaml#L31

BenTheElder commented 3 weeks ago

Note: kind clusters are sharing the host kernel with sketchy isolation.

What's the use case for NPD-on-kind?