Added "domain" label to bb prometheus config.

prometheus.yml

@@ -60,6 +60,14 @@ scrape_configs:
       - target_label: __address__
         replacement: bbexp:9115  # The blackbox exporter's real hostname:port.
     metric_relabel_configs:
+      - source_labels: [instance] 
+        regex: '.*?[.](.*)'
+        replacement: '$1'
+        target_label: domain
+      - source_labels: [domain] 
+        regex: '^$'
+        replacement: 'jaytaala.com'
+        target_label: domain
       - source_labels: [instance] 
         regex: '.*/(.+?)[:.].*'
         replacement: '$1'