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| Section | Objectives |
|---|---|
| Cluster Administration | - User and role management
|
| Security and Troubleshooting | - Troubleshooting
|
| Networking and Ingress | - Cluster networking
|
| OpenShift Cluster Installation and Configuration | - Cluster setup and installation verification
|
| Storage and Persistence | - Persistent storage configuration
|
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問題 #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.
答案：
解題說明：
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.
問題 #12
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 #13
Configure limits
Configure your OpenShift cluster to use limits in the bluebook project with the following requirements:
The name of the LimitRange resource is: ex280-limits
The amount of memory consumed by a single pod is between 5Mi and 300Mi The amount of memory consumed by a single container is between 5Mi and
300Mi with a default request value of 100Mi
The amount of CPU consumed by a single pod is between 10m and 500m
The amount of CPU consumed by a single container is between 10m and 500m with a default request value of
100m
答案：
解題說明：
See the solution below in Explanation.
Explanation:
Solution:
$ vim limit.yaml
# Edit the yaml file like below mentioned
apiVersion: "v1" kind: "LimitRange" metadata:
name: "resource-limits" spec:
limits:
- type: "Pod"
max:
cpu: "500m" memory: "300Mi"
min:
cpu: "10m" memory: "5Mi"
- type: "Container" max:
cpu: "500m" memory: "300Mi"
min:
cpu: "10m" memory: "5Mi"
defaultRequest: cpu: "100m" memory: "100Mi"
$ oc create -f limit.yaml --save-config -n bluebook
$ oc describe limitranges -n bluebook
問題 #14
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 #15
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 #16
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EX280下載: https://www.kaoguti.com/EX280_exam-pdf.html