Example for deploying to multiple locations with Farmer

multiple-locations.fsx

#r "nuget:Farmer"

open Farmer
open Farmer.Builders

// Sometimes resources aren't available in certain regions and another location needs to be chosen.
// The best way to do this is to create a nested resource group deployment to the _same_ resource
// group, and choose a different location for that nested deployment

arm {
    location Location.WestEurope
    add_resources [
        storageAccount {
            name "mywesteuropestorage1234"
        }
        resourceGroup { // Creates a nested deployment
            name "[resourceGroup().name]" // but it will be to the same resource group
            deployment_name "deploying-with-westeurope-resources"
            location Location.NorthEurope // Specify the different location for these resources
            add_resources [ // Add resources as normal.
                storageAccount {
                    name "mynortheuropestorage9876"
                }
            ]
        }
    ]
} |> Writer.quickWrite "multiple-locations"

Resulting JSON

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "outputs": {},
  "parameters": {},
  "resources": [
    {
      "apiVersion": "2019-06-01",
      "dependsOn": [],
      "kind": "StorageV2",
      "location": "westeurope",
      "name": "mywesteuropestorage1234",
      "properties": {},
      "sku": {
        "name": "Standard_LRS"
      },
      "tags": {},
      "type": "Microsoft.Storage/storageAccounts"
    },
    {
      "apiVersion": "2020-10-01",
      "dependsOn": [],
      "name": "deploying-with-westeurope-resources",
      "properties": {
        "expressionEvaluationOptions": {
          "scope": "Inner"
        },
        "mode": "Incremental",
        "parameters": {},
        "template": {
          "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
          "contentVersion": "1.0.0.0",
          "outputs": {},
          "parameters": {},
          "resources": [
            {
              "apiVersion": "2019-06-01",
              "dependsOn": [],
              "kind": "StorageV2",
              "location": "northeurope",
              "name": "mynortheuropestorage9876",
              "properties": {},
              "sku": {
                "name": "Standard_LRS"
              },
              "tags": {},
              "type": "Microsoft.Storage/storageAccounts"
            }
          ]
        }
      },
      "resourceGroup": "[resourceGroup().name]",
      "tags": {},
      "type": "Microsoft.Resources/deployments"
    }
  ]
}