Power BI On -Premise Gateway version downgrade

[parag_yara]

Hi Team 

We are performing Power BI On -Premise Gateway version downgrade with Primary Gateway server. 

What steps we need to follow and what things we need to take care from our side.

[parag_yara]

Hi Team 

We performed uinstall and re-installation using same name over Power BI Gateway servers first secondary and then with primary , all works well. After of it we got to know our data connection over power bi gateway cluster under app.powerbi.com are not working as earlier , we checked with every one from DB admin , Network firewall and SPN related team no tracess found and VM management we are still facing "invalid credential error " over data connection even SSO config also working fine. but UPN showing invalid user credential.

[bcdobbs]

I've done this before.

It's a basic uninstall and reinstall provided you have the gateway restore key. Should just pick straight up.

https://learn.microsoft.com/en-us/data-integration/gateway/service-gateway-migrate

[parag_yara]

Thanks for your response.
Please understand when we will going to perform uninstallation over the primary node Gateway server, will it impact cluster definition in app.powerbi.com, I mean that " while doing installation using recovery key, do we need to use existing Gateway name and Cluster name (which exists before activity) or should we do update of it with fresh name? " 

[Wikkleyn_81]

Hi @parag_yara Downgrading is not as scary as you think. As long as you have the recovery key you will be fine.

As bcdobbs mentioned, everythihng will still be in place when you are done with the installation and select Migrate, restore, or takeover an existing gateway > Select the gateway and enter the recovery key. 
https://learn.microsoft.com/en-us/data-integration/gateway/service-gateway-migrate
Make sure the gateway members in a cluster are running the same gateway version, as different versions could cause unexpected failures based on supported functionality.

I usually Disable the gateway that's going to be migrated and then re-enable the gateway member when done.

https://learn.microsoft.com/en-us/power-platform/admin/onpremises-data-gateway-management#details 

[bcdobbs]

No cluster and gateway name will still exist in the service. You're just uninstalling the client. Then when you reinstall you should be able to "take it over" and select the name from the list.

If you created a new cluster you'd have to set up your connections again.

[parag_yara]

do you mean For example before activity Power BI Gateway = "GT01" and Cluster name = "CLS01" then after ( uninstall - reinstall )step  we can use same GT01 and CLS01 only.

[bcdobbs]

Yes, should be able to keep same names.