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| Certification Vendor: | Red Hat |
|---|---|
| Exam Name: | Red Hat Certified Specialist in OpenShift Administration exam |
| Exam Number: | EX280 |
| Available Languages: | Chinese, English, Japanese |
| Exam Duration: | 180 minutes |
| Related Certifications: | Red Hat Certified Specialist in OpenShift Application Development Red Hat Certified Architect (RHCA) |
| Exam Format: | Command-line interface, Performance-based hands-on lab, No multiple choice questions |
| Exam Price: | USD 400 |
| Passing Score: | not publicly disclosed |
| Real Exam Qty: | not publicly disclosed (performance-based hands-on lab) |
| Certificate Validity Period: | 3 years |
| Sample Questions: | RedHat EX280 Sample Questions |
| Exam Way: | In-person at Red Hat testing centers or online proctored exam |
| Pre Condition: | Recommended: Red Hat OpenShift Administration I (DO280) course or equivalent experience with containers, Kubernetes, and OpenShift |
| Official Syllabus URL: | https://www.redhat.com/en/services/certification/ex280 |
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EX280 考試評估了配置、管理和疑難排解紅帽開放式移植容器平台所需的技能和知識。該考試旨在測試候選人部署應用程序、創建和管理項目、配置和管理網絡訪問以及疑難排解 OpenShift 常見問題的能力。認證考試採用封閉式書面形式，候選人需要在一定時間內完成一組任務。
問題 #20
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.
答案：
解題說明：
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.
問題 #21
Managing Group
Task information Details:
Create the groups site-users and guest-users .
Add qwerty to guest-users .
Add harry and susan to site-users .
Grant edit to site-users on test .
Grant view to guest-users on demo .
答案：
解題說明：
See the solution below in Explanation.
Explanation:
Solution:
* Create the groups:
oc adm groups new site-users
oc adm groups new guest-users
* Add users to groups:
oc adm groups add-users guest-users qwerty
oc adm groups add-users site-users harry susan
* Grant edit role on test to site-users:
oc policy add-role-to-group edit site-users -n test
* Grant view role on demo to guest-users:
oc policy add-role-to-group view guest-users -n demo
* Verify:
oc get groups
oc describe group site-users
oc describe group guest-users
oc get rolebinding -n test
oc get rolebinding -n demo
This task measures practical administration of OpenShift groups and project-scoped RBAC assignments.
問題 #22
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
答案：
解題說明：
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
問題 #23
Install Helm Chart
Task information Details:
Add the Helm repository do280-repo and install the example-app release from the specified chart.
答案：
解題說明：
See the solution below in Explanation.
Explanation:
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.
問題 #24
Use Secret in Monday Project
Task information Details:
Use the secret created earlier as environment variables in deployment monday .
答案：
解題說明：
See the solution below in Explanation.
Explanation:
Solution:
* Switch to the correct project if needed:
oc project monday
* Inject environment variables from the secret:
oc set env deployment/monday --from=secret/magic
* Verify:
oc set env deployment/monday --list
oc describe deployment monday
Notes:
* The uploaded lab references secret/file-secret, but Task 8 clearly intends the secret to be named magic .
* In a real exam, match the actual secret name present in the cluster.
This task tests secret consumption by workloads through environment variable injection.
問題 #25
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