[Nagiosplug-devel] RFC: Performance data guidelines

[Voon, Ton]

This is it - version 1 (alpha) of Nagios plugins performance data:

'label'=value[UOM];[crit];[warn][;[max];[min]]

- space separated
- the single quotes for the label are optional. Required if spaces, = or '
are in the label
- to specify a quote character, two single quotes
- max and min are optional. Holds max space available
- label can contain any characters
- label length is arbitrary, but ideally the first 19 chars are unique (RRD
limitation). Be aware of a limitation in Nagios' plugin returned data
- value, crit, warn, max and min in class [-0-9.]. Must be all the same UOM
- UOM is one of:

no unit specified - assume a number (int or float) of things (users,
processes, load averages)
s - seconds (also us, ms)
% - percentage
B - bytes (also kB, MB, TB)
c - a continuous counter (such as bytes transmitted on an interface)

The aim is that perf data is stored in "Nagios plugin" format. A separate
program does the parsing into whatever you want to use to draw the data (eg,
for RRD, label character and length conversions to conform to limitations)

I'll update the dev guidelines in the next few days.

My feeling about the "direct" and "indirect" plugins is that the indirect
plugins should default to the above performance data format, but is
overrideable with a -P printf specifier.


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