Add vmSizeCustom param to override VM SKU

Author: asw101

linux/vm-tailscale/vm.bicep

@@ -15,6 +15,9 @@ param vmName string = 'vm1'
 ])
 param vmSize string = 'Standard_B2s_v2'
 
+@description('Custom VM size (overrides vmSize if set).')
+param vmSizeCustom string = ''
+
 @description('The Storage Account Type for OS and Data disks.')
 @allowed([
   'Standard_LRS'
@@ -215,7 +218,7 @@ resource vm 'Microsoft.Compute/virtualMachines@2024-03-01' = {
   }
   properties: {
     hardwareProfile: {
-      vmSize: vmSize
+      vmSize: vmSizeCustom != '' ? vmSizeCustom : vmSize
     }
     storageProfile: {
       osDisk: {

linux/vm-tailscale/vm.json

@@ -5,7 +5,7 @@
     "_generator": {
       "name": "bicep",
       "version": "0.40.2.10011",
-      "templateHash": "15889812350987912667"
+      "templateHash": "9014597243353373291"
     }
   },
   "parameters": {
@@ -34,6 +34,13 @@
         "description": "The Virtual Machine size."
       }
     },
+    "vmSizeCustom": {
+      "type": "string",
+      "defaultValue": "",
+      "metadata": {
+        "description": "Custom VM size (overrides vmSize if set)."
+      }
+    },
     "diskAccountType": {
       "type": "string",
       "defaultValue": "Premium_LRS",
@@ -252,7 +259,7 @@
       },
       "properties": {
         "hardwareProfile": {
-          "vmSize": "[parameters('vmSize')]"
+          "vmSize": "[if(not(equals(parameters('vmSizeCustom'), '')), parameters('vmSizeCustom'), parameters('vmSize'))]"
         },
         "storageProfile": {
           "osDisk": {