README.md

Resource Quota

Resource Quota
Tips and Tricks

For simulated Practice problems visit KillerCoda.

1. create a namespace demo and create a resource quota demo-quota with hard requests cpu=1, memory=1Gi and hard limits cpu=2, memory=2Gi.

   Solution

   # create namespace
   k create ns demo
   
   # create resource quota > quota.yaml
   apiVersion: v1
   kind: ResourceQuota
   metadata:
     name: demo-quota
     namespace: demo
   spec:
     hard:
       requests.cpu: "1"
       requests.memory: 1Gi
       limits.cpu: "2"
       limits.memory: 2Gi
   
   k create -f quota.yaml
   
   k create quota demo-quota -n demo --hard=requests.cpu=1,requests.memory=1Gi,limits.cpu=2,limits.memory=2Gi 

2. Try creating a pod server with nginx image in demo namespace with resources request of cpu=2.1 and memory=2.5Gi. The pod creation will fail

   Solution

   # create the server pod
   k run server --image=nginx --dry-run=client -o yaml > pod.yaml
   
   # update resources request and limits in the pod
   apiVersion: v1
   kind: Pod
   metadata:
     creationTimestamp: null
     labels:
       run: server
     name: server
     namespace: demo
   spec:
     containers:
     - image: nginx
       name: server
       resources:
         requests:
           cpu: "2.1"
           memory: 2.5Gi
     dnsPolicy: ClusterFirst
     restartPolicy: Always

3. Modify server pod with resources request of cpu=1 and memory=1Gi.

   Solution

   # delete the pod if it exists.
   k delete po server --force
   
   # update resources request and limits in the pod
   apiVersion: v1
   kind: Pod
   metadata:
     creationTimestamp: null
     labels:
       run: server
     name: server
   spec:
     containers:
     - image: nginx
       name: server
       resources:
         requests:
           cpu: "1"
           memory: 1Gi
     dnsPolicy: ClusterFirst
     restartPolicy: Always