Cacti/Squid Setup

From Gentoo Linux Wiki

Jump to: navigation, search

Contents

[edit] Getting Started

To graph your squid proxy on cacti you will first need to install a template for your squid graphs. One helpful user posted a set of templates for squid here: http://forums.cacti.net/about3158.html

However if you follow the instructions laid out they will not work because in cacti 0.8.6 some changes were made that did not allow you to use a host that does not deliver a proper hostname and uptime (squid does not provide these).

So to get started install everything as laid out in the README file of that teamplate set. When you reach the section for adding a device stop, that is where we make some changes.

[edit] Using your snmpd as a proxy

This section assumes you have installed Cacti/SNMP_host_setup, if you have not done so, do so now.

Alter your /etc/snmp/snmpd.conf to include the following line :

File: /etc/snmp/snmpd.conf 
...
proxy -m /usr/share/squid/mib.txt -v 1 -c public localhost:3401 .1.3.6.1.4.1.3495.1
'''OR'''
proxy -v 1 -c public localhost:3401 .1.3.6.1.4.1.3495.1
...

I found I could not get this to work without the following line in smtpd.conf 

...
view system included .1.3.6.1.4.1.3495.1
...

Please check for the location of your mib.txt file it may be different than listed

Alter your /etc/squid/squid.conf to include the following lines :

File: /etc/squid/squid.conf 
######################
# Cacti/Squid Stats
#####################
acl snmpcommunity snmp_community public
snmp_port 3401
snmp_access allow snmpcommunity localhost
snmp_access deny all

If you search for snmp it will be obvious where to put these lines, this setup is valid for localhost not any remote host

This will proxy your squid's snmp traffic and allow for it to transfer proper hostname and uptime information.

[edit] Continuing

Continue following the README provided by the package above, when adding the device make sure to use the snmpd port and NOT your squid's snmp port. From this point you should have no trouble adding graphs and other squid data to graphs.

NB: You may need to do one more step to the data queries in order for the graphs to be filled. Go to Console -> Data Queries, and choose one of the two Squid Web Cache entries. Then for each of the associated graph templates, go into the entry and tick the checkbox next to the data source, and click save. This seems to enable data collection on that measure - for some reason it's disabled by default.

[edit] Troubleshooting

[edit] Testing Squid 

snmpwalk -c public -v1 127.0.0.1:3401 .1.3.6.1.4.1.3495.1

if this returns a whole bunch of lines, squid is properly providing snmp

[edit] Testing your tunnel 

snmpwalk -c public -v1 127.0.0.1:161 .1.3.6.1.4.1.3495.1

if this returns a whole bunch of lines, snmpd is properly proxy'ing the squid connection

[edit] How it looks

Cacti Logo

Squid hit/miss rate

Squid response time

Squid traffic savings graph

[edit] More

Retrieved from "http://www.gentoo-wiki.com/Cacti/Squid_Setup"
Personal tools