SNMPAgent not working on V1.0.X

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SNMPAgent not working on V1.0.X

#1 Post by thubbard » Wed Feb 22, 2017 2:27 pm

I've been trying to get the snmpagent plugin working, it would make a great replacement for a number of scripts I have running to gather stats on my various pollers. I know that's it's considered part of Cacti now, and I never tried to use it when it was a plugin.

It seems like it should be pretty easy to get going, put a pass_persist line in my /etc/snmp/snmpd.conf, make sure permissions on the <cacti>/snmpagent_*.php files are correct, restart the snmpd service. This is the line I put in the file:

pass_persist . /data/cactiapp/cacti/snmpagent_persist.php

After restarting my snmpd service, I see this:

[[email protected] snmp]# ps -ef | grep snmp
root 20319 1 0 18:55 ? 00:00:01 /usr/sbin/snmpd -LS0-6d -f
root 20329 20319 0 18:56 ? 00:00:00 /usr/bin/php /data/cactiapp/cacti/snmpagent_persist.php
root 20336 1 0 18:56 ? 00:00:00 /bin/php -q ./snmpagent_mibcache.php

But when I try to poll it:

[[email protected] snmp]# snmpwalk -v2c -c****** localhost .
SNMPv2-SMI::enterprises.23925 = No Such Instance currently exists at this OID

Additionally, it keeps launching new processes as time goes by, so much so that I end up out of memory after a day. Finally, I get this in my cacti.log every 30 seconds:

2017-02-22 19:26:30 - CMDPHP PHP ERROR NOTICE Backtrace: (/snmpagent_mibcachechild.php: 47 CactiErrorHandler)(/lib/functions.php: 4242 cacti_debug_backtrace)
2017-02-22 19:26:30 - ERROR PHP NOTICE: Undefined variable: snmpagent in file: /data/cactiapp/cacti-1.0.2/snmpagent_mibcachechild.php on line: 47

Does anyone have this working against a V1.0.X install?


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Re: SNMPAgent not working on V1.0.X

#2 Post by browniebraun » Mon Feb 27, 2017 6:39 pm

Hi thubbard,

I've just read your note and committed a bug fix addressing that issue. ... 02e2eff9ed

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Re: SNMPAgent not working on V1.0.X

#3 Post by thubbard » Wed Apr 12, 2017 6:10 pm

I upgraded to 1.1.2 recently, and it does appear that this works now, sort of.

It does return values when I run an snmpwalk against the CACTI-MIB root OID.

However, it doesn't populate any of the performance counters (poller time, RRDs processed, etc.) for pollers other than the master that hosts the database. I'm trying to dig into the code to figure out why.

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Re: SNMPAgent not working on V1.0.X

#4 Post by Osiris » Tue Apr 25, 2017 7:11 pm

Maybe that belongs in GitHub?
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Re: SNMPAgent not working on V1.0.X

#5 Post by jt555 » Thu Oct 11, 2018 3:17 pm

Should the Cacti SNMPAgent be able to send THOLD traps in 1.1.37?

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