luc.run

Exercise

Create the specification of a Pod named mongo and based on the mongo:5.0 image
Modify the specification to make sure the container has 64Mi of RAM and 30m cpu allocated
Modify the specification to make sure the container cannot use more than 128Mi and 50m cpu
Create the Pod
Retrieve the content of the Pod’s resources with the jsonpath output
Delete the Pod

Documentation

https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/#example-1

Solution

Create the specification of a Pod named mongo and based on the mongo:5.0 image

kubectl run mongo --image=mongo:5.0 --dry-run=client -o yaml > mongo.yaml

Modify the specification to make sure the container has 64Mi of RAM and 30m cpu allocated

apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    run: mongo
  name: mongo
spec:
  containers:
  - image: mongo:5.0
    name: mongo
    resources:
      requests:
        cpu: 30m
        memory: 64Mi

Modify the specification to make sure the container cannot use more than 128Mi and 50m cpu

apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    run: mongo
  name: mongo
spec:
  containers:
  - image: mongo:5.0
    name: mongo
    resources:
      requests:
        cpu: 30m
        memory: 64Mi
      limits:
        cpu: 50m
        memory: 128Mi

Create the Pod

k apply -f mongo.yaml

Retrieve the content of the Pod’s resources with the jsonpath output

k get po/mongo -o jsonpath={.spec.containers[0].resources}
{"limits":{"cpu":"50m","memory":"128Mi"},"requests":{"cpu":"30m","memory":"64Mi"}}

Delete the Pod

k delete -f mongo.yaml