[Offer] Red Hat Certified Specialist in OpenShift 4.2 Administration Exam Prep (ex280)

[yanatoy]

thank

[bleacheda]

thanks

[Tyrone]

thank you

[Pikine]

ok

 

[duckman]

tks

[Gauravawl]

thx

 

[srikanth]

thx

[srikanth]

thx

[MTIMAR78]

Merci!

[rajivraivns]

thx

[rajivraivns]

thx

[Verwolff]

Does anybody have a fresh dump for EX280? Currently, the exam is based on version 4.14, so 12 issues from the one offered here!

[mikedata]

Thank you very much.

[rajivraivns]

thx

[ammanch]

I just passed EX380 couple of days..... 80% of exam is based on official book labs, but tricky though. 

RHCI RPM maybe you can find from China market if you get lucky ... But you need 250GB of RAM, huge CPU and Storage in TBs.

Edited April 18 by ammanch

[throwaway521]

Just passed EX280 recently (4.14). Here are general topics:

1. HTPasswd auth provider configuration, and users creation via htpasswd.

2. Assigning users to groups, giving them view, edit, cluster-admin roles etc, removal of kubeadmin user (you have to remove a secret in kube-system ns).

3. Removing access to self provision projects (you need to edit self-provisioners clusterrolebinding and disable autoupdate in annotations), and giving that access only to selected ones.

4. Configuration of an project template with custom LimitRange and ResourceQuota. When new project gets created, they use these LimitRange/ResourceQuota resources.

5. Network policy between two project. There's an existing networkpolicy that blocks all ingress, and you have to create new one to allow traffic on selected port, from selected namespace.

6. Usage of 'oc adm must-gather'.

7. By hand creation of PersistentVolume, PVC which use certain NFS storage class + deployment, service + route configuration. Difficulty there is that you need to go to that storage class manually and copy nfs address and path, and put it into PV, as it won't self provision itself.

8. Configuration of edge route, using custom generated key and certificate using provided script to generate them.

9. Troubleshooting pods (eg. there's invalid selector in service, or a single container has requirements of 100 cpu cores).

10. Installation of an new operator (it's easy to do via web UI).

11. Giving an serviceaccount permission to run as any uid (usage of SCC).
12. Installation of helm chart via provided repo.

 

Overall there were around 20 questions but above it's a jist of it.

Edited Thursday at 07:03 PM by throwaway521

[hansong]

greate thanks

[hansong]

thanks a lot

 

[Verwolff]

On 4/21/2024 at 9:29 PM, throwaway521 said:

Just passed EX280 recently (4.14). Here are general topics:

1. HTPasswd auth provider configuration, and users creation via htpasswd.

2. Assigning users to groups, giving them view, edit, cluster-admin roles etc, removal of kubeadmin user (you have to remove a secret in kube-system ns).

3. Removing access to self provision projects (you need to edit self-provisioners clusterrolebinding and disable autoupdate in annotations), and giving that access only to selected ones.

4. Configuration of an project template with custom LimitRange and ResourceQuota. When new project gets created, they use these LimitRange/ResourceQuota resources.

5. Network policy between two project. There's an existing networkpolicy that blocks all ingress, and you have to create new one to allow traffic on selected port, from selected namespace.

6. Usage of 'oc adm must-gather'.

7. By hand creation of PersistentVolume, PVC which use certain NFS storage class + deployment, service + route configuration. Difficulty there is that you need to go to that storage class manually and copy nfs address and path, and put it into PV, as it won't self provision itself.

8. Configuration of edge route, using custom generated key and certificate using provided script to generate them.

9. Troubleshooting pods (eg. there's invalid selector in service, or a single container has requirements of 100 cpu cores).

10. Installation of an new operator (it's easy to do via web UI).

11. Giving an serviceaccount permission to run as any uid (usage of SCC).

 

Overall there were around 20 questions but above it's a jist of it.

Many thanks, for this... On the first look, it seems that 4.14 does not change much from the last attempt I made two years ago. I was afraid of something like Helm chart or Operators which are in the 4.14 training book during the exam but it does look OK.  

[throwaway521]

On 4/22/2024 at 11:53 PM, Verwolff said:

Many thanks, for this... On the first look, it seems that 4.14 does not change much from the last attempt I made two years ago. I was afraid of something like Helm chart or Operators which are in the 4.14 training book during the exam but it does look OK.  

Now as I've read about Helm chart I remember that there was one exercise with helm charts. But it was just about adding a repo and installing the chart. Nothing difficult. As of operator there was one exercise but all of it you can do from UI - really simple as well.