Troubleshooting kubernetes

• Workflow for Troubleshooting kubernetes
  

Common kuberentes Errors

• CreateContainerConfigError:
  • This is result of a missing secret or config map
• CrashLoopBackoff:
  • This issued is due to pod not scheduled on node which can happen due to
    • insufficient resources
    • pod did not succeed in mounting volumes
    • hostPort
• ErrImagePull or ImagePullBackOff
  • This is result of failure occured as the image couldnot be pulled from registryt
• Node not Ready

Setting up metrics server on kubernetes

• To setup metrics server the command is

kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml

• This doesnot work out of box for kubeadm
• Make changes in the args of container of deployment spec of metrics server
  
  
• Kuberentes dashboard Refer Here
• Refer Here for steps