I see dead Pods

Get rid of Pod was terminated in response to imminent node shutdown. Pods forever.

Table of Contents

• Story
• Setup
  • kubectl
  • kustomize
  • flux helmrelease

Story

In kubernetes with gracefull shutdown enabled, pods can stay for long time perriods in a broken state. The state results in alerting getting fired by kube-prometheus-stack.

[FIRING:1] Pod has been in a non-ready state for more than 15 minutes.
Severity:  warning
Description: Pod default/some-container-7fb4c4fbc5-gbjwm has been in a non-ready state for longer than 15 minutes.
Details:
  • alertname: KubePodNotReady \
  • namespace: default \
  • pod: some-container-7fb4c4fbc5-gbjwm \
  • prometheus: observability/kube-prometheus-stack-prometheus \
  • severity: warning

Most of the solutions on the internet describe an uncontrolled deletion of all Pods in Error or Terminated state. Wich I consider as a bad idea, because you will not see anymore if real Error Pods are in your system.

These manifests provide a kubernetes CronJob deleting constantly all Pods with given criterias.

Setup

kubectl

You can apply the manifests manually:

kubectl apply -f https://raw.githubusercontent.com/tyriis/i-see-dead-pods/main/manifests/service-account.yaml
kubectl apply -f https://raw.githubusercontent.com/tyriis/i-see-dead-pods/main/manifests/cluster-role.yaml
kubectl apply -f https://raw.githubusercontent.com/tyriis/i-see-dead-pods/main/manifests/cluster-role-binding.yaml
kubectl apply -f https://raw.githubusercontent.com/tyriis/i-see-dead-pods/main/manifests/cronjob.yaml

kustomize

or with kustomize

flux helmrelease

or with flux