=encoding utf8
=head1 NAME
mrtg-squid - using mrtg to monitor Squid
=head1 DESCRIPTION
Squid 2.3 knows SNMP and you can therefore use mrtg to
monitor it quite easily.
I have made some modifications to mrtg which simplify this.
My work is based on earlier modification made by:
matija.grabnar@arnes.si and kostas@nlanr.net.
=head1 MODIFICATIONS
I added new code for displaying correct units to the
previous patches "perminute" and "perhour" ("option" tokens),
which allows other measurement in addition to "persecond".
Then I created a new option token "dorelpercent" which
allows the calculation of the percentage of IN-stream / OUT-stream on
the fly and then displays it on a fixed scale from 0% to 100%. For my
requirements, this does good work. Maybe someone wants a floating
scale. It should not be a problem to implement it, too (but
give me an option to keep my fixed scale). If IN-stream is always
less than OUT-stream both lines (OUT-stream and relative percent)
are always displayed on top of IN-stream bulk. Otherwise this
option makes no sense. With this option you can display hitrates,
errorrates (for router monitoring: rel. droprates) easily now.
If you use this options please consider that you need a 5th
colourname/value pair in your Colours statements!
Due to some discussion on this list, I have implemented two
tokens too:
"kilo" and "kMG"
"kilo" should contain the value of k (1000 or 1024), where 1000 is the
default.
"kMG" is a comma separated list of multiplier prefixes, used
instead of "", "k", "M", "G", "T" on the MRTG display. Leave the
place free, if you want no prefix.
Also an incomplete list of OIDs for the new SQUID release is
added.
You may need to turn on snmp_port in squid.conf to as it is disabled by default.
I hope you enjoy it.
=head1 CONFIG EXAMPLE
First load the squid mib
LoadMIBs: /usr/share/squid/mib.txt
You can measure responsetimes in ms and display it with MRTG
correctly with:
kMG[measure-ms]: m,,k,M,G,T
short[measure-ms]: s
You can display now MB/s as 1024*1024 B/s with:
kilo[volume]: 1024
Assuming you're not running squid's SNMP on the default snmp port, you need
to include a port number in your target line:
Target[proxy-hit]: cacheHttpHits&cacheProtoClientHttpRequests:public@localhost:3401
A sample config for squid:
Target[proxy-hit]: cacheHttpHits&cacheProtoClientHttpRequests:public@proxy
Title[proxy-hit]: HTTP Hits
PageTop[proxy-hit]: <H2>proxy Cache Statistics: HTTP Hits / Requests</H2>
Suppress[proxy-hit]: y
LegendI[proxy-hit]: HTTP hits
LegendO[proxy-hit]: HTTP requests
Legend1[proxy-hit]: HTTP hits
Legend2[proxy-hit]: HTTP requests
YLegend[proxy-hit]: perminute
ShortLegend[proxy-hit]: req/min
Options[proxy-hit]: nopercent, perminute, dorelpercent
Target[proxy-srvkbinout]: cacheServerInKb&cacheServerOutKb:public@proxy
Title[proxy-srvkbinout]: Cache Server Traffic In / Out
PageTop[proxy-srvkbinout]: <H2>Cache Statistics: Server traffic volume (In/Out) </H2>
Suppress[proxy-srvkbinout]: y
LegendI[proxy-srvkbinout]: Traffic In
LegendO[proxy-srvkbinout]: Traffic Out
Legend1[proxy-srvkbinout]: Traffic In
Legend2[proxy-srvkbinout]: Traffic Out
YLegend[proxy-srvkbinout]: per minute
ShortLegend[proxy-srvkbinout]: b/min
kMG[proxy-srvkbinout]: k,M,G,T
kilo[proxy-srvkbinout]: 1024
Options[proxy-srvkbinout]: nopercent, perminute
=head1 AUTHOR
Andreas Papst E<lt>andreas.papst@univie.ac.atE<gt>
Dirk-Lüder Kreie E<lt>deelkar@gmx.deE<gt>
Chris Chiappa E<lt>chris+debian@chiappa.netE<gt>