Create cosmos db in another region, but in same deployment

[nikodemrafalski]

Hi!
Is it possible to create one resource in location other than owning resource group?

I have a bunch of resources in West Europe, but need to create cosmos db in another region.

At the moment I'm using this workaround :

 arm {
        location envSettings.PrimaryLocation
        add_resources [virtualNetwork; privateDnsZone]
        add_resources [webAppsIdentity]
        add_resources [persistentStorageAccount; temporaryStorageAccount; versionedStorageAccount; kv]
        add_resources [apisAi]
        add_resources [
            resourceGroup {
                name "[resourceGroup().name]"
                deployment_name "cosmosdb_canadaeast"
                location Location.CanadaEast
                add_resource cosmodb
            }
        ]
        ...
        ...
        add_tags envSettings.Tags
    }

But it creates a nested deployment, so other resources cannot use cosmodb config to for example add its connection string to webapp config variables. and I'm getting error on live subscription "cosmosdb is not part of deployment"

[isaacabraham]

You could do it as a two step deployment i.e. first deploy the CosmosDB resource, and then a second deployment that uses the ResourceId of the CosmosDB instance as a "weak" link.

@TheRSP I know that you worked on a lot of the resource group deployment stuff - any thoughts here?

[r30e]

Personally, I've got around this issue with an extension on the deployment builder. Something like this:

[<CustomOperation "add_resources_in_location">]
member this.AddInLocation (state, location, resources) =
  this.AddArmResources(state, resources |> List.collect (fun x -> x.BuildResources location))

(Apologies for code quality, I'm writing on a phone)

However given that farmer bakes-in the location of a resource as part of the add_resources call, you can change the location of the resource group and this won't affect any resource which has already been added.

arm {
  location EastUS
  add_resources eastUsResources
  location CanadaEast
  add_resources canadaEastResources
}

[isaacabraham]

@TheRSP feel free to create that as a PR etc. - no problems with that from my side (although I would recommend documenting it as well to explain the use case for it).