EX280 是一個占有一定比重的認證科目。由於人數太少，加上需求太大，導致擁有 EX280 認證的人成為薪酬最高的資訊技術專業認證人員。由於技能是本身擁有的，加上在全球範圍內的幾乎所有國家都有類似需求。所以，RedHat 的 EX280 認證為網路工程師打開了通往全球各地的大門。如果您通過了EX280 的考試，將證明你的專業技能和貢獻，展示你的知識與能力。如果你被認證為一個 EX280 網路公司的專家，你就會成為這個領域中最有知識的專家之一。
| Certification Vendor: | Red Hat |
|---|---|
| Exam Name: | Red Hat Certified Specialist in OpenShift Administration exam |
| Exam Number: | EX280 |
| Exam Price: | USD 400 |
| Real Exam Qty: | not publicly disclosed (performance-based hands-on lab) |
| Certificate Validity Period: | 3 years |
| Passing Score: | not publicly disclosed |
| Available Languages: | Chinese, Japanese, English |
| Exam Duration: | 180 minutes |
| Exam Format: | No multiple choice questions, Performance-based hands-on lab, Command-line interface |
| Related Certifications: | Red Hat Certified Architect (RHCA) Red Hat Certified Specialist in OpenShift Application Development |
| 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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RedHat EX280考試是一項開源企業級容器管控平台OpenShift的專業認證。此認證是為系統管理員設計，旨在驗證他們安裝、配置和管理OpenShift集群的能力。成為經認證的RedHat EX280專業人士不僅是專業能力的標誌，也表明該專業人士掌握了當前OpenShift最佳實踐和技術。
問題 #21
Scale an application manually
Manually scale the minion application in the gru project to a total of 5 replicas.
答案：
解題說明：
See the solution below in Explanation.
Explanation:
Solution:
$ oc project gru
$ oc get pods
$ oc get all | grep deployment
$ oc scale --replicas=5 deployment.apps/minion
$ oc get pods
問題 #22
Deploy an application
Deploy the application called rocky in the bullwinkle project so that the following conditions are true:
The
application is reachable at the following address: http://rocky.apps.domainXX.example.com The application produces output
答案：
解題說明：
See the solution below in Explanation.
Explanation:
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
問題 #23
Configure a service account
Configure a service account in the apples project to meet the following requirements:
The name of the account is ex280sa
The account allows pods to be run as any available user
答案：
解題說明：
See the solution below in Explanation.
Explanation:
Solution:
$ oc project apples
$ oc create sa ex280sa
$ oc adm policy add-scc-to-user anyuid -z ex280sa
問題 #24
Configure an identity provider
Configure your OpenShift cluster to use an HTPasswd identity provider with the following requirements:
The name of the identity provider is: ex280-htpasswd The name of the secret is: ex280-idp-secret The user account armstrong=indionce The user account collins=veraster The user account aldrin=roonkere The user account jobs=sestiver The user account wozniak=glegunge
答案：
解題說明：
See the solution below in Explanation.
Explanation:
Solution:
$ sudo yum install httpd-tools -y
$ htpasswd -c -B -b htpasswd-file-upload armstrong indionce
$ htpasswd -B -b htpasswd-file collins veraster
$ htpasswd -B -b htpasswd-file aldrin roonkere
$ htpasswd -B -b htpasswd-file jobs sestiver
$ htpasswd -B -b htpasswd-file wozniak glegunge
$ oc create secret generic ex280-idp-secret --from-file
htpasswd=htpasswd-file -n openshift-config
$ oc get oauth/cluster -o yaml > oauth.yaml
$ vim oauth.yaml
$
esc-- > type :set paste -- > enter -- > insert -- > then paste the content for correct indent pasting spec:
identityProviders:
- name: ex280-htpasswd mappingMethod: claim type: HTPasswd htpasswd:
fileData:
name: ex280-idp-secret
$ oc replace -f oauth.yaml
$ oc login -u armstrong -p indionce
$ oc login -u collins -p veraster
$ oc login -u aldrin roonkere
$ oc login -u jobs sestiver
$ oc login -u wozniak -p glegunge
#This below part of operation is completely optional and done just for handy login purpose
$ alias _kube="oc login -u kubeadmin -p ${kube_pass} ${api_url}"
$ alias _armstrong="oc login -u armstrong -p ${armstrong}
${api_url}"
$ alias _collins="oc login -u collins -p ${collins} ${api_url}"
$ alias _aldrin="oc login -u aldrin -p ${aldrin} ${api_url}"
$ alias _jobs="oc login -u jobs -p ${jobs} ${api_url}"
$ alias _wozniak="oc login -u wozniak -p ${wozniak} ${api_url}"
$ _armstrong;_armstrong;_collins;_aldrin;_jobs;_wozniak;
問題 #25
Create LimitRanges for Project Darpa
Task information Details:
Switch to project darpa and create a LimitRange with Pod and Container minimums and maximums of CPU and memory, plus default container values.
答案：
解題說明：
See the solution below in Explanation.
Explanation:
Solution:
* Switch to the target project:
oc project darpa
* Create a YAML file, for example limitrange.yaml:
apiVersion: v1
kind: LimitRange
metadata:
name: darpa-limits
namespace: darpa
spec:
limits:
- type: Pod
max:
cpu: 300m
memory: 300Mi
min:
cpu: 5m
memory: 5Mi
- type: Container
max:
cpu: 300m
memory: 300Mi
min:
cpu: 5m
memory: 5Mi
default:
cpu: 100m
memory: 100Mi
* Apply it:
oc apply -f limitrange.yaml
* Verify:
oc get limitrange -n darpa
oc describe limitrange darpa-limits -n darpa
This task validates namespace-level defaulting and constraint policies for pod scheduling and resource consumption.
問題 #26
......
EX280考試指南: https://tw.fast2test.com/EX280-premium-file.html