v-m: Scrape wal-g via statsd_exporter

The database server now runs _statsd_exporter_, which receives metrics
from WAL-G whenever it saves WAL segments or creates backups.

victoria-metrics/scrape.yml

@@ -426,6 +426,17 @@ scrape_configs:
     target_label: __address__
     replacement: '$1:9187'
 
+- job_name: wal-g
+  static_configs:
+  - targets:
+    - db0.pyrocufflink.blue
+  relabel_configs:
+  - source_labels: [__address__]
+    target_label: instance
+  - source_labels: [__address__]
+    target_label: __address__
+    replacement: '$1:9102'
+
 - job_name: rabbitmq
   kubernetes_sd_configs:
   - role: pod