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| Certification Vendor: | Red Hat |
|---|---|
| Exam Name: | Red Hat Certified Specialist in OpenShift Administration Exam (EX280) |
| Exam Number: | EX280 |
| Related Certifications: | Red Hat Certified Specialist in Containers and Kubernetes Red Hat Certified System Administrator (RHCSA) Red Hat Certified Engineer (RHCE) |
| Available Languages: | English |
| Exam Duration: | 150 minutes |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | Performance-based (no fixed number of questions) |
| Exam Price: | USD 400 (varies by region) |
| Exam Format: | Performance-based lab exam |
| Passing Score: | 210/300 |
| Recommended Training: | DO180 - Introduction to Kubernetes and OpenShift DO280 - Red Hat OpenShift Administration II: Operating a Production Kubernetes Cluster |
| Exam Registration: | Red Hat Certification Catalog EX280 Exam Page |
| Sample Questions: | RedHat EX280 Sample Questions |
| Exam Way: | Online or onsite performance-based exam in a live OpenShift environment |
| Pre Condition: | Recommended experience with Linux administration and Kubernetes/OpenShift fundamentals (RHCSA or equivalent knowledge recommended) |
| Official Syllabus URL: | https://www.redhat.com/en/services/certification/ex280-red-hat-certified-specialist-openshift-administration |
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The EX280 Exam covers a range of topics, including basic OpenShift concepts, cluster management and administration, application deployment, and troubleshooting. Candidates are expected to be well-versed in the use of the command line interface and have experience working with Kubernetes and container orchestration. Successful completion of the exam demonstrates that the candidate has the skills and knowledge required to become a Red Hat Certified Specialist in OpenShift Administration.
NEW QUESTION # 10
Deploy an application
Deploy the application called oranges in the apples project so that the following conditions are true:
The application uses the ex280sa service account
No additional configuration components have been added or removed The application produces output
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
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
NEW QUESTION # 11
Manage Identity Provider
Task information Details:
Create the following HTPasswd users: bob, qwerty, john, armstrong, natasha, harry, susan .
Create a secret from the HTPasswd file in openshift-config .
Configure cluster OAuth to use the HTPasswd identity provider.
Restart the OAuth pods so the new authentication configuration takes effect.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
* Create the initial HTPasswd file with the first user:
htpasswd -c -B -b /tmp/htpass.txt bob indionce
* Add the remaining users:
htpasswd -b /tmp/htpass.txt qwerty catalog
htpasswd -b /tmp/htpass.txt john john123
htpasswd -b /tmp/htpass.txt armstrong natasha123
htpasswd -b /tmp/htpass.txt natasha arthstrong
htpasswd -b /tmp/htpass.txt harry harry123
htpasswd -b /tmp/htpass.txt susan susuan123
* Create the secret in openshift-config :
oc create secret generic ex280-secure --from-file=htpasswd=/tmp/htpass.txt -n openshift-config
* Edit OAuth and add the HTPasswd identity provider:
oc edit oauth cluster
* Use a valid structure like this:
spec:
identityProviders:
- name: ex280-idp-secure
mappingMethod: claim
type: HTPasswd
htpasswd:
fileData:
name: ex280-secure
* Save and exit.
* Restart OAuth pods:
oc delete pod -n openshift-authentication -l app=oauth-openshift
* Verify:
oc get pods -n openshift-authentication
oc get oauth cluster -o yaml
This task validates OpenShift local authentication configuration through HTPasswd and cluster OAuth integration.
NEW QUESTION # 12
Manage Cluster Project and Permission
Task information Details:
Create projects apollo , test , and demo .
Grant bob the cluster-admin role.
Prevent ordinary authenticated users from self-provisioning projects.
Allow john to create projects.
Give natasha view-only access to test and apollo .
Give armstrong admin access to apollo .
Remove the kubeadmin user secret.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
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.
NEW QUESTION # 13
Create Resource Quota for Project Rocky
Task information Details:
Use project rocky and create a quota named rocky-quota with limits for CPU, memory, pods, services, replication controllers, and secrets.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
* Ensure the project exists and switch to it:
oc new-project rocky
oc project rocky
* Create the quota:
oc create quota rocky-quota \
--hard=limits.cpu=2,limits.memory=1Gi,pods=3,services=6,replicationcontrollers=6,secrets=6
* Verify:
oc get resourcequota -n rocky
oc describe quota rocky-quota -n rocky
Notes:
* The lab text uses cpu=2,memory=1G and secret=6; in real OpenShift usage, the more reliable forms are limits.cpu, limits.memory, and secrets.
* If the exam specifically expects the exact resource names shown in the lab environment, use what the cluster accepts.
This task checks quota enforcement and namespace resource governance.
NEW QUESTION # 14
Configure quotas
Configure your OpenShift cluster to use quotas in the manhattan project with the following requirements:
The name of the ResourceQuota resource is: ex280-quota
The amount of memory consumed across all containers may not exceed 1Gi
The total amount of CPU usage consumed across all containers may not exceed
2 full cores
The maximum number of replication controllers does not exceed 3 The maximum number of pods does not exceed 3 The maximum number of services does not exceed 6
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
$ oc project manhattan
$ oc create quota ex280-quota -- hard=memory=1Gi,cpu=2,pods=3,services=6,replicationcontrollers=3
$ oc get resourcequota
NEW QUESTION # 15
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