Add prefix to datadog metrics

docs/content/reference/static-configuration/cli-ref.md

@@ -240,6 +240,9 @@ Enable metrics on routers. (Default: ```false```)
 `--metrics.datadog.addserviceslabels`:  
 Enable metrics on services. (Default: ```true```)
 
+`--metrics.datadog.prefix`:  
+Prefix to use for metrics collection. (Default: ```traefik```)
+
 `--metrics.datadog.pushinterval`:  
 Datadog push interval. (Default: ```10```)
 

docs/content/reference/static-configuration/env-ref.md

@@ -240,6 +240,9 @@ Enable metrics on routers. (Default: ```false```)
 `TRAEFIK_METRICS_DATADOG_ADDSERVICESLABELS`:  
 Enable metrics on services. (Default: ```true```)
 
+`TRAEFIK_METRICS_DATADOG_PREFIX`:  
+Prefix to use for metrics collection. (Default: ```traefik```)
+
 `TRAEFIK_METRICS_DATADOG_PUSHINTERVAL`:  
 Datadog push interval. (Default: ```10```)
 

docs/content/reference/static-configuration/file.toml

@@ -250,6 +250,7 @@
     addEntryPointsLabels = true
     addRoutersLabels = true
     addServicesLabels = true
+    prefix = "foobar"
   [metrics.statsD]
     address = "foobar"
     pushInterval = "42s"

docs/content/reference/static-configuration/file.yaml

@@ -272,6 +272,7 @@ metrics:
     addEntryPointsLabels: true
     addRoutersLabels: true
     addServicesLabels: true
+    prefix: foobar
   statsD:
     address: foobar
     pushInterval: 42