add support for varnish plugin categories

Since commit collectd-4.10.0-88-g02e12db the varnish plugin groups collected
values in categories. The collectd filestructure used for varnish is now:

  <plugin>-<category>-<plugin_instance>/<type>-<type_instance>

Because this isn't distinguishable from a regular plugin like df, ...

  df-var-tmp/df_complex-free.rrd ("var" isn't the category here)

... the category is only set with the varnish plugin.

Reported-by: Jonathan Huot <jonathan.huot@gmail.com>

1 files changed, 3 insertions, 14 deletions

diff --git a/plugin/varnish.php b/plugin/varnish.php
index 4de4463..8099691 100644
--- a/plugin/varnish.php
+++ b/plugin/varnish.php
@@ -26,19 +26,8 @@ $obj = new Type_Default($CONFIG);
 $obj->width = $width;
 $obj->heigth = $heigth;
 $obj->rrd_format = '%5.1lf%s';
-switch($obj->args['pinstance']) {
-        case 'default-backend':
-                $obj->rrd_title = 'backend';
-                $obj->rrd_vertical = 'hits';
-                break;
-        case 'default-cache':
-                $obj->rrd_title = 'cache';
-                $obj->rrd_vertical = 'hits';
-                break;
-        case 'default-connections':
-                $obj->rrd_title = 'connections';
-                $obj->rrd_vertical = 'hits';
-                break;
-}
+$obj->rrd_title = sprintf('%s (%s)', ucfirst($obj->args['pinstance']), $obj->args['category']);
+$obj->rrd_vertical = 'hits';
+
 collectd_flush($obj->identifiers);
 $obj->rrd_graph();