Added "shortname" label. Set scrape for bb to 15s.

prometheus.yml

@@ -34,7 +34,7 @@ scrape_configs:
     - targets: ['10.0.0.137:10091']
 
   - job_name: 'blackbox'
-    scrape_interval: 20s
+    scrape_interval: 15s
     metrics_path: /probe
     params:
       module: [http_2xx]  # Look for a HTTP 200 response.
@@ -59,3 +59,8 @@ scrape_configs:
         target_label: instance
       - target_label: __address__
         replacement: bbexp:9115  # The blackbox exporter's real hostname:port.
+    metric_relabel_configs:
+      - source_labels: [instance] 
+        regex: '.*/(.+?)[:.].*'
+        replacement: '$1'
+        target_label: shortname