Share App Service plan in different azure resource group

Question

I have two web apps in different Resource Groups. I want to use a shared App Service Plan. Please guide how this can be done, When I try to use "Change Service Plan" I can not see another resource group service plan. Both Resource groups are in same region. When I try to create a App Service Plan I can not see option as a shared resource.

Answer 1

It is not possible to move App Service to App Service plan in another resource group.

You can move an app to another App Service plan, as long as the source plan and the target plan are in the same resource group and geographical region.

Additional Info:

Azure deploys each new App Service plan into a deployment unit, internally called a webspace. Each region can have many webspaces, but your app can only move between plans that are created in the same webspace. An App Service Environment is an isolated webspace, so apps can be moved between plans in the same App Service Environment, but not between plans in different App Service Environments.

You can't specify the webspace you want when creating a plan, but it's possible to ensure that a plan is created in the same webspace as an existing plan. In brief, all plans created with the same resource group and region combination are deployed into the same webspace. For example, if you created a plan in resource group A and region B, then any plan you subsequently create in resource group A and region B is deployed into the same webspace. Note that plans can't move webspaces after they're created, so you can't move a plan into “the same webspace” as another plan by moving it to another resource group.

Ref: https://docs.microsoft.com/en-us/azure/app-service/app-service-plan-manage#move-an-app-to-another-app-service-plan

Answer 2

I am too late for the show, but still - it's possible to at least CREATE an App Service with App Service Plan from another resource group (not geographical region though).

You can pick up some details from here:

https://praveenkumarsreeram.com/2019/09/11/share-azure-app-service-plan-across-resource-groups/