More README

README

@@ -1,3 +1,15 @@
+=========================
+ RabbitMQ Munin Plug-Ins
+=========================
+
+Installation
+============
+
+Copy the plug-ins to the munin plugin directory, e.g ``/etc/munin/plugins/``.
+
+Granting Permissions
+====================
+
 To use these plug-ins you (regretfully) have to grant access for the
 munin-node user to use rabbitmqctl via sudo.
 
@@ -7,3 +19,29 @@ Add this to your ``/etc/sudoers`` file by running ``visudo``::
     muninuser ALL= NOPASSWD: /usr/sbin/rabbitmqctl list_connections
 
 Be careful and use at your own risk!
+
+Using a Custom Virtual Host
+============================
+
+You can set the name of virtual host by changing the plug-in configuration
+file (on debian that is ``/etc/munin/plugin-conf.d``)::
+
+    [rabbitmq-consumers]
+    env.vhost vhostname
+
+    [rabbitmq-messages]
+    env.vhost vhostname
+
+    [rabbitmq-messages_unacknowledged]
+    env.vhost vhostname
+
+    [rabbitmq-messages_uncommitted]
+    env.vhost vhostname
+
+    [rabbitmq-queue_memory]
+    env.vhost vhostname
+
+Author
+======
+
+Ask Solem <askh@opera.com>