RedHat EX280 Exam Dumps

Solution:

$ oc project mercury

$ oc get pods

$ oc get all | grep deploy

$ oc describe deployment.apps/atlas | grep -L memory

$ oc set resources deployment.apps/atlas --resources=memory=80Mi

Solution:

Create the projects:

oc new-project apollo

oc new-project test

oc new-project demo

Grant cluster-admin to bob:

oc adm policy add-cluster-role-to-user cluster-admin bob

Disable normal self-provisioning for authenticated users:

oc adm policy remove-cluster-role-from-group self-provisioner system:authenticated:oauth

Allow john to self-provision:

oc adm policy add-cluster-role-to-user self-provisioner john

Give natasha view access in test and apollo:

oc policy add-role-to-user view natasha -n test

oc policy add-role-to-user view natasha -n apollo

Give armstrong admin in apollo:

oc policy add-role-to-user admin armstrong -n apollo

Remove kubeadmin secret:

oc delete secret kubeadmin -n kube-system

Verify permissions:

oc adm policy who-can create projectrequests

oc describe rolebinding.rbac -n apollo

oc describe rolebinding.rbac -n test

This task tests core OpenShift administration around project lifecycle control, cluster-level RBAC, and decommissioning default bootstrap credentials.

Solution:

Scale the deployment:

oc scale deployment httpd --replicas=5

Verify:

oc get deployment httpd

oc get pods -l app=httpd

Confirm the desired, current, and available replica counts match.

This task checks direct workload scaling using the OpenShift CLI.

Solution:

$ oc project bullwinkle

$ oc get pods

$ oc get all | grep deploy

$ oc get nodes

$ oc describe nodes | grep -i taint

$ oc adm taint nodes worker0 key1=value1:NoSchedule-

$ oc adm taint nodes worker1 key1=value1:NoSchedule-

$ oc describe nodes | grep -i taint

$ oc get route

$ oc delete route rocky

$ oc expose svc rocky --hostname rocky.apps.domainxx.example.com

$ oc get route

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.