collectd-blockstat
Overview:
collectd-blockstat is a collectd plugin (written in Python) that reads the Linux 2.6 /sys/block/<device>/stat "file" and records detailed device statistics.
It is a superset of the "disk" plugin that ships with collectd. The main difference is it records additional fields present in /sys/block/<device>/stat.
This plugin requires the collectd Python plugin, which was introduced in collectd 4.9. To configure, drop the blockstat.py file into a directory where collectd is configured to find Python modules (ModulePath param).
The plugin must be explicitly told which devices to monitor. This is done
by defining "Device" parameters inside the <Module> block for blockstat.
One "Device" parameter per device. To see which devices are available, just
ls -1 /sys/block/*/stat.
The plugin produces data for the "blockstat" plugin. The plugin instance will be the device name. The plugin will write gauge data for 11 types.
The Linux kernel source code tree documentation Documentation/block/stat.txt describes the fields in /sys/block/<device>/stat and can help you make sense of the data.
Example configuration:
<Plugin python>
ModulePath "/path/to/modules"
Import "blockstat"
<Module blockstat>
Disk "sda"
Disk "sda1"
</Module>
</Plugin>
Thanks:
Many thanks to Gregory Szorc for his collectd-diskstats plugin on which this is based
License:
Copyright 2014 Anthony Tonns
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.