mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-13 17:14:23 -08:00
49 lines
2.3 KiB
Markdown
49 lines
2.3 KiB
Markdown
# Contributing
|
|
|
|
Prometheus uses GitHub to manage reviews of pull requests.
|
|
|
|
* If you have a trivial fix or improvement, go ahead and create a pull request,
|
|
addressing (with `@...`) the maintainer of this repository (see
|
|
[MAINTAINERS.md](MAINTAINERS.md)) in the description of the pull request.
|
|
|
|
* If you plan to do something more involved, first discuss your ideas
|
|
on our [mailing list](https://groups.google.com/forum/?fromgroups#!forum/prometheus-developers).
|
|
This will avoid unnecessary work and surely give you and us a good deal
|
|
of inspiration.
|
|
|
|
* Relevant coding style guidelines are the [Go Code Review
|
|
Comments](https://code.google.com/p/go-wiki/wiki/CodeReviewComments)
|
|
and the _Formatting and style_ section of Peter Bourgon's [Go: Best
|
|
Practices for Production
|
|
Environments](http://peter.bourgon.org/go-in-production/#formatting-and-style).
|
|
|
|
* Sign your work to certify that your changes were created by yourself or you
|
|
have the right to submit it under our license. Read
|
|
https://developercertificate.org/ for all details and append your sign-off to
|
|
every commit message like this:
|
|
|
|
Signed-off-by: Random J Developer <example@example.com>
|
|
|
|
|
|
## Collector Implementation Guidelines
|
|
|
|
The Node Exporter is not a general monitoring agent. Its sole purpose is to
|
|
expose machine metrics, as oppose to service metrics, with the only exception
|
|
being the textfile collector.
|
|
|
|
The metrics should not get transformed in a way that is hardware specific and
|
|
would require maintaining any form of vendor based mappings or conditions. If
|
|
for example a proc file contains the magic number 42 as some identifier, the
|
|
Node Exporter should expose it as it is and not keep a mapping in code to make
|
|
this human readable. Instead, the textfile collector can be used to add a static
|
|
metric which can be joined with the metrics exposed by the exporter to get human
|
|
readable identifier.
|
|
|
|
A Collector may only read `/proc` or `/sys` files, use system calls or local
|
|
sockets to retrieve metrics. It may not require root privileges. Running
|
|
external commands is not allowed for performance and reliability reasons. Use a
|
|
dedicated exporter instead or gather the metrics via the textfile collector.
|
|
|
|
The Node Exporter tries to support the most common machine metrics. For more
|
|
exotic metrics, use the textfile collector or a dedicated Exporter.
|