[varnish] Document varnish group requirement

Was already documented on the web UI, add it to the yaml example file. [skip ci]
DataDog · Mar 25, 2016 · a48876d · a48876d
1 parent f756f87
commit a48876d
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/conf.d/varnish.yaml.example b/conf.d/varnish.yaml.example
@@ -1,6 +1,9 @@
 init_config:
 
 instances:
+  # If you're running Varnish 4.1+, you must add the dd-agent user to the varnish group.
+  # $ sudo usermod -G varnish -a dd-agent
+
   # The full path to the varnishstat binary
   - varnishstat: /usr/bin/varnishstat