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Pods examples

Below there are short description about objects definition inside yaml files.

Multiple containers in one pods

kubectl create -f multiple-containers.yml

This example run 3 containers inside a one pod callednginx:

  • nginx - run nginx that listen on port 80
  • check-host-80 - check if nginx is accessible via localhost:80. Also it redirects netstat result to local /etc/hello and /data/hello. The /data/hello is put on persistent volumes claim examplepvc.
  • check-files - this container use watch with 15 seconds interval to check if /etc/hello and /data/hello appear inside this container.

Useful command:

  • Get pods list (minikube default namespace is called default): kubectl get pods
  • Exec to check-files container inside nginx pod: kubectl exec -it nginx -c check-files sh
  • Get container logs with follow (-f): kubectl logs nginx -c check-files
  • Cleaning: kubectl delete pod nginx && kubectl delete pvc examplepvc

Different container types

kubectl create -f different-container-type.yml

Pod limits

Multiple pods with different limit/request schedules.

kubectl create -f pods-limits.yaml

Useful command:

  • Check limit namespace settings: kubectl describe namespace limit
  • Get quota for the limit namespace: kubectl get quota -n limit
  • Get limits for the limit namespace: kubectl get limits -n limit
  • Get pods details: kubectl describe pod nginx-overloaded -n limit
  • Cleaning: kubectl delete ns limit

Mount different resources to container

Multiple pods with different object mounted.

kubectl create -f mount-resources.yml