This plugin is used daily on a couple of machines and causes no headaches. Tested on Debian Stable, other setups should work fine but were not tried yet.

This plugin tracks number of open files for all processes of the specified program. Each process is represented by its own line in the chart.

To install this plugin you need to copy/symlink fdcount.py to Munin's plugin directory (usually /etc/munin/plugins/) and make that file executable (chmod +x).

This plugin MUST be configured before use:

• env.fdcount_target - executable name for processes to monitor (required)
• env.fdcount_strict - if this variable is set, env.fdcount_target must contain full executable path instead of just the filename
• env.fdcount_track_pids - if this variable is set, processes will be distinguished based on their PID instead of just command line
• user - either root or the user that started the processes in question

More information on installation and configuration of plugins is available in the Munin Guide

Short version with just the filename:

[fdcount.py]
env.fdcount_target transmission-daemon
user root

More specific target:

[fdcount.py]
env.fdcount_target /usr/bin/transmission-daemon
env.fdcount_strict 1
user transmission

If you need help with using this plugin please create an issue. Issues are also the primary venue for reporting bugs and posting feature requests. General discussion related to this project is also acceptable and very welcome!

In case you wish to contribute code or documentation, feel free to open a pull request. That would certainly make my day!

I'm open to dialog and I promise to behave responsibly and treat all contributors with respect. Please try to do the same, and treat others the way you want to be treated.

If for some reason you'd rather not use the issue tracker, contacting me via email is OK too. Please use a descriptive subject line to enhance visibility of your message. Also please keep in mind that public discussion channels are preferable because that way many other people may benefit from reading past conversations. My email is visible under the GitHub profile and in the commit log.

Copyright 2019 Vitaly Potyarkin

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

    https://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.