fix(azure): make the dns resource group optional

internal/azure/azure.go

@@ -163,6 +163,50 @@ func (c *Client) GetStorageAccessKeys(ctx context.Context, resourceGroup, storag
 	}, nil
 }
 
+func (c *Client) ListResourceGroups(ctx context.Context) ([]*armresources.ResourceGroup, error) {
+	client, err := c.newResourceClientFactory()
+	if err != nil {
+		return nil, err
+	}
+
+	pager := client.NewResourceGroupsClient().NewListPager(nil)
+
+	var groups []*armresources.ResourceGroup
+
+	for pager.More() {
+		page, err := pager.NextPage(ctx)
+		if err != nil {
+			return nil, fmt.Errorf("failed to list resource groups: %w", err)
+		}
+
+		groups = append(groups, page.Value...)
+	}
+
+	return groups, nil
+}
+
+func (c *Client) TestHostedZoneLivenessWildcard(ctx context.Context, domainName string) (bool, *string, error) {
+	groups, err := c.ListResourceGroups(ctx)
+	if err != nil {
+		return false, nil, err
+	}
+
+	// Search through resource groups and return true for first match
+	for _, resourceGroup := range groups {
+		name := resourceGroup.Name
+		hasDomain, err := c.TestHostedZoneLiveness(ctx, domainName, *name)
+		if err != nil {
+			return false, nil, err
+		}
+
+		if hasDomain {
+			return true, name, err
+		}
+	}
+
+	return false, nil, nil
+}
+
 func (c *Client) TestHostedZoneLiveness(ctx context.Context, domainName, resourceGroup string) (bool, error) {
 	client, err := c.newDNSClientFactory()
 	if err != nil {

internal/controller/domain.go

@@ -41,7 +41,15 @@ func (clctrl *ClusterController) DomainLivenessTest() error {
 				return fmt.Errorf("domain liveness check failed for AWS: %w", err)
 			}
 		case "azure":
-			domainLiveness, err := clctrl.AzureClient.TestHostedZoneLiveness(context.Background(), clctrl.DomainName, clctrl.AzureDNSZoneResourceGroup)
+			var domainLiveness bool
+			ctx := context.Background()
+
+			if clctrl.AzureDNSZoneResourceGroup == "" {
+				domainLiveness, _, err = clctrl.AzureClient.TestHostedZoneLivenessWildcard(ctx, clctrl.DomainName)
+			} else {
+				domainLiveness, err = clctrl.AzureClient.TestHostedZoneLiveness(ctx, clctrl.DomainName, clctrl.AzureDNSZoneResourceGroup)
+			}
+
 			if err != nil {
 				return fmt.Errorf("domain liveness command failed for Azure: %w", err)
 			}