EX280 Questions and Answers

Solution:

Create landing-pv.yaml:

apiVersion: v1

kind: PersistentVolume

metadata:

name: landing-pv

spec:

capacity:

storage: 1Gi

accessModes:

- ReadOnlyMany

nfs:

path: /open001

server: 192.168.2.2

persistentVolumeReclaimPolicy: Retain

Apply it:

oc apply -f landing-pv.yaml

Create landing-pvc.yaml:

apiVersion: v1

kind: PersistentVolumeClaim

metadata:

name: landing-pvc

spec:

accessModes:

- ReadOnlyMany

resources:

requests:

storage: 1Gi

storageClassName: nfs2

Apply it:

oc apply -f landing-pvc.yaml

Verify:

oc get pv

oc get pvc

oc describe pv landing-pv

oc describe pvc landing-pvc

This task validates persistent storage provisioning and claim binding concepts.

Solution:

Switch to the project:

oc project qed

Create the service account:

oc create serviceaccount project1-sa -n qed

Grant the SCC:

oc adm policy add-scc-to-user anyuid -z project1-sa -n qed

Verify:

oc get sa project1-sa -n qed

oc adm policy who-can use scc anyuid

Why this matters:

anyuid allows containers to run with arbitrary user IDs when an application requires it.

This is a common administrative task in OpenShift for third-party container images.

This task validates service account creation and SCC assignment.

Solution:

Set resource requests on the deployment:

oc set resources deployment httpd --requests=cpu=50m,memory=100Mi

Create the HPA:

oc autoscale deployment httpd --min=2 --max=9 --cpu-percent=60

Verify:

oc get hpa

oc describe hpa httpd

oc get deployment httpd -o yaml

Why resource requests matter:

HPA CPU utilization is calculated against requested CPU.

Without requests, percentage-based autoscaling is incomplete or invalid.

This task focuses on autoscaling prerequisites and policy creation.

Solution:

Add the repository:

helm repo add do280-repo http://helm.ocp4.example.com/charts

Refresh repositories:

helm repo update

Install the chart:

helm install example-app do280-repo/etherpad

Verify:

helm list

oc get all

Notes:

The uploaded lab text appears to spell the chart name incorrectly as ehterpad.

In practice, use the actual chart name published in the repo. If the lab repo truly contains the typo, follow the repo index result.

This task tests Helm repository management and application deployment.