self-hosted-runners: make Azure region configurable

This makes it easier to configure the Azure VM region. Let's default to
"centralindia" while we're at it, as it's the cheapest option at the
time of writing.

Signed-off-by: Dennis Ameling <[email protected]>

Author: dennisameling

.github/workflows/create-azure-self-hosted-runners.yml

@@ -40,6 +40,8 @@ env:
   # Note that you'll need "p" (arm64 processor) and ideally "d" (local temp disk). The number 8 stands for 8 CPU-cores.
   # For a convenient overview of all arm64 VM types, see e.g. https://azureprice.net/?_cpuArchitecture=Arm64
   AZURE_VM_TYPE: Standard_D8plds_v5
+  # At the time of writing, "centralindia" was the cheapest region for the VM type we're using. https://azureprice.net/vm/Standard_D8plds_v5
+  AZURE_VM_REGION: centralindia
 
 # The following secrets are required for this workflow to run:
 # AZURE_CREDENTIALS - Credentials for the Azure CLI. It's recommended to set up a resource
@@ -153,7 +155,7 @@ jobs:
       with:
         resourceGroupName: ${{ secrets.AZURE_RESOURCE_GROUP }}
         template: ./azure-self-hosted-runners/azure-arm-template.json
-        parameters: ./azure-self-hosted-runners/azure-arm-template-example-parameters.json githubActionsRunnerRegistrationUrl="${{ env.ACTIONS_RUNNER_REGISTRATION_URL }}" githubActionsRunnerToken="${{ env.ACTIONS_RUNNER_TOKEN }}" postDeploymentPsScriptUrl="${{ env.POST_DEPLOYMENT_SCRIPT_URL }}" virtualMachineName=${{ steps.generate-vm-name.outputs.vm_name }} virtualMachineSize="${{ env.AZURE_VM_TYPE }}" publicIpAddressName1=${{ steps.generate-vm-name.outputs.vm_name }}-ip adminUsername=${{ secrets.AZURE_VM_USERNAME }} adminPassword=${{ secrets.AZURE_VM_PASSWORD }} stopService=${{ env.DEALLOCATE_IMMEDIATELY }} githubActionsRunnerPath="${{ env.ACTIONS_RUNNER_PATH }}"
+        parameters: ./azure-self-hosted-runners/azure-arm-template-example-parameters.json githubActionsRunnerRegistrationUrl="${{ env.ACTIONS_RUNNER_REGISTRATION_URL }}" githubActionsRunnerToken="${{ env.ACTIONS_RUNNER_TOKEN }}" postDeploymentPsScriptUrl="${{ env.POST_DEPLOYMENT_SCRIPT_URL }}" virtualMachineName=${{ steps.generate-vm-name.outputs.vm_name }} virtualMachineSize="${{ env.AZURE_VM_TYPE }}" publicIpAddressName1=${{ steps.generate-vm-name.outputs.vm_name }}-ip adminUsername=${{ secrets.AZURE_VM_USERNAME }} adminPassword=${{ secrets.AZURE_VM_PASSWORD }} stopService=${{ env.DEALLOCATE_IMMEDIATELY }} githubActionsRunnerPath="${{ env.ACTIONS_RUNNER_PATH }}" location="${{ env.AZURE_VM_REGION }}"
 
     - name: Deallocate the VM for later use
       if: env.DEALLOCATE_IMMEDIATELY == 'true'

azure-self-hosted-runners/azure-arm-template-example-parameters.json

@@ -2,9 +2,6 @@
     "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentParameters.json#",
     "contentVersion": "1.0.0.0",
     "parameters": {
-        "location": {
-            "value": "westeurope"
-        },
         "enableAcceleratedNetworking": {
             "value": true
         },