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+# haproxyng Munin Plugin
+
+This is a Munin plugin which allows you to monitor a large number of statistics
+from within HAPRoxy, including:
+
+  * Bandwidth for Frontends
+      * Broken down by Service
+  * Bandwidth for Backends
+      * Broken down by Service
+          * Broken down by Host
+  * Timings for Backends
+      * Broken down by Service
+          * Broken down by Host
+  * Sessions for Frontends
+      * Broken down by Service
+  * Sessions for Backends
+      * Broken down by Service
+          * Broken down by Host
+  * Response Codes for Frontends
+      * Broken down by Service (aggregating by Status Code)
+          * Broken down by Status Code
+  * Response Codes for Backends
+      * Broken down by Service (aggregating by Server)
+          * Broken down by Server
+      * Broken down by Service (aggregating by Status Codes)
+          * Broken down by Status (aggregating by Server)
+              * Broken down by Server
+
+## Warning
+
+This can product a lot of graphs: With about 50 servers and around 10 services
+you can probably exceed over 1000 graphs being produced covering all the above.
+
+This setup either required some *very* fast hardware, or it's best to make sure
+that you are using something like `rrdcached` and SSDs to make sure that you
+are aggregating updates, caching reads, etc. Additionally, creating graphs
+on-the-fly via CGI may end up being better, unless you can safely produce a very
+large number of graphs every five minutes with room to spare and grow!
+
+## Usage
+
+You will need Munin 2.0 as this is a `multigraph` plugin and will output all
+graphs in a single run.
+
+   [haproxyng*]
+     env.socket /path/to/socket
+     env.clean prefix-
+
+`haproxyng` takes two environmental options:
+
+  * `socket` which is the path to the UNIX socket to HAProxy. This script only
+    needs the `user` level permission to get read access to the statistics. No
+    write or admin level access is required.
+  * `clean` which can be used to strip common parts of a name from the
+    configuration. For example if you're configuration is automatically
+    generated and everything is prefixed with "staging-" or "production_" then
+    put that (or any other regex) into `clean` and it will be cleaned from any
+    titles before being output to Munin.
+
+Beyond that, copy/symlink it to the `plugins/` directory on the relevant node
+and wait for it to run. Running
+
+    munin-run haproxyng config
+
+is also possible to verify that it can see everything and output the
+configuration data for Munin.
+
+## Licence
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.