Add configurable tags to influxdb metrics

docs/content/observability/metrics/influxdb.md

@@ -235,3 +235,29 @@ metrics:
 ```bash tab="CLI"
 --metrics.influxdb.pushInterval=10s
 ```
+
+#### `additionalLabels`
+
+_Optional, Default={}_
+
+Additional labels (influxdb tags) on all metrics.
+
+```toml tab="File (TOML)"
+[metrics]
+  [metrics.influxDB]
+    [metrics.influxDB.additionalLabels]
+      host = "example.com"
+      environment = "production"
+```
+
+```yaml tab="File (YAML)"
+metrics:
+  influxDB:
+    additionalLabels:
+      host: example.com
+      environment: production
+```
+
+```bash tab="CLI"
+--metrics.influxdb.additionallabels.host=example.com --metrics.influxdb.additionallabels.environment=production
+```