add missing fields to haproxy input (influxdata#2323)

CHANGELOG.md

@@ -45,6 +45,7 @@ It is highly recommended that all users migrate to the new riemann output plugin
 
 - [#2077](https://github.com/influxdata/telegraf/issues/2077): SQL Server Input - Arithmetic overflow error converting numeric to data type int.
 - [#2262](https://github.com/influxdata/telegraf/issues/2262): Flush jitter can inhibit metric collection.
+- [#2318](https://github.com/influxdata/telegraf/issues/2318): haproxy input - Add missing fields.
 - [#2287](https://github.com/influxdata/telegraf/issues/2287): Kubernetes input: Handle null startTime for stopped pods.
 - [#2356](https://github.com/influxdata/telegraf/issues/2356): cpu input panic when /proc/stat is empty.
 - [#2341](https://github.com/influxdata/telegraf/issues/2341): telegraf swallowing panics in --test mode.

plugins/inputs/haproxy/README.md

@@ -10,6 +10,7 @@
   servers = ["http://1.2.3.4/haproxy?stats", "/var/run/haproxy*.sock"]
 ```
 
+#### `servers`
 Server addresses need to explicitly start with 'http' if you wish to use HAproxy status page. Otherwise, address will be assumed to be an UNIX socket and protocol (if present) will be discarded.
 
 For basic authentication you need to add username and password in the URL: `http://user:[email protected]/haproxy?stats`.
@@ -26,9 +27,12 @@ When using socket names, wildcard expansion is supported so plugin can gather st
 
 If no servers are specified, then the default address of `http://127.0.0.1:1936/haproxy?stats` will be used.
 
+#### `keep_field_names`
+By default, some of the fields are renamed from what haproxy calls them. Setting the `keep_field_names` parameter to `true` will result in the plugin keeping the original field names.
+
 ### Measurements & Fields:
 
-Plugin will gather measurements outlined in [HAproxy CSV format documentation](https://cbonte.github.io/haproxy-dconv/1.5/configuration.html#9.1).
+Plugin will gather measurements outlined in [HAproxy CSV format documentation](https://cbonte.github.io/haproxy-dconv/1.7/management.html#9.1).
 
 ### Tags: