how to run an action on a kubernetes node (not inside container) whenever a pod is scheduled or unscheduled on it?

5/22/2019

I need to run a script on a node shell level (not inside the container) whenever a pod is scheduled or unscheduled on it. I've searched documentation, but found only ways to add hooks running inside containers (https://kubernetes.io/docs/tasks/configure-pod-container/attach-handler-lifecycle-event/, https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle/#container-probes). Does kubernetes have an API I could use to achieve this somehow? Thanks!

-- morgwai

kubernetes

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1 Answer

5/22/2019

This is what you should do

use event exporter to capture those events
Deploy a webhook service
invoke the webhook when shedule or unshedule event happens
via webhook you should be able to trigger a script

-- P Ekambaram

Source: StackOverflow