docs: Provide more flexibility for filtering tags in resource discove…

…ry (#1797)

Co-authored-by: Tom Kerkhove <[email protected]>

changelog/content/experimental/unreleased.md

@@ -10,4 +10,6 @@ None.
 
 #### Resource Discovery
 
-None.
+- {{% tag changed %}} Provide more flexibility for filtering tags in resource discovery ([docs](https://docs.promitor.io/configuration/v2.x/resource-discovery#criteria)
+ | [#1793](https://github.com/tomkerkhove/promitor/issues/1793)
+ | Contributed by [@locmai](https://github.com/locmai) 🎉).

docs/configuration/v2.x/resource-discovery.md

@@ -43,7 +43,7 @@ resourceDiscoveryGroups:
       - promitor-resource-group-1
       - promitor-resource-group-2
       tags:
-        app: promitor
+        app: promitor-1|promitor-2
         region: europe
       regions:
       - northeurope
@@ -80,7 +80,7 @@ As of now, we only allow to define criteria that resources have to meet before t
 - `subscriptions` - A list of subscription(s) in which the resource is allowed to be located.
 - `resourceGroups` - A list of resource group(s) in which the resource is allowed to be located.
 - `tags` - A list of [Azure tags](https://docs.microsoft.com/en-us/azure/azure-resource-manager/management/tag-resources)
- and the expected values with which the resources have to be annotated. (Uses `or`)
+ and the expected values (exact or regular expression) with which the resources have to be annotated. (Uses `or`)
 - `regions` - A list of Azure region(s) in which the resource is allowed to be located.
 
 ## Supported Azure Services