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List: mrtg
Subject: [mrtg] Odd problem with squid mibs..
From: "Kettler, Matt" <Matt.Kettler () edocorp ! com>
Date: 2008-03-26 19:59:58
Message-ID: 3517CACAE247DD498B74D4B65A379E953D9696 () corpcboemb01 ! edocorp ! com
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I have a squid monitoring configuration, which I recently ported from
one server that uses mrtg-2.11.1 onto a server running mrtg-2.16.1.
On 2.11.1 I had no problems at all with this config, using the same
daemon_mode.cfg and everything.
I brought over my MRTG config, copied my squid mibfile, etc onto the new
server. My switch configs are different in that I regenerated them using
snmp v2 commands, due to the overflows.. however, even prior to that the
squid config wasn't working on the new box.
What's strange is, mrtg-2.116.1 appears to parse some of the variables
out of my squid mibfile when operated in daemon mode, but parses other
variables out of the same mibfile just fine.
If I run the config manually, i.e.:
env LANG=C /usr/bin/mrtg --logging /var/log/mrtg.log squid_server.cfg
All works fine.
If I load it with my daemon mode config, it starts to break.
My init script sets LANG=C near the top of the file, and passes mrtg:
the following parameters: /etc/mrtg/daemon_mode.cfg --logging
/var/log/mrtg.log
My daemon_mode.cfg looks like this (actual server names removed):
RunAsDaemon: Yes
Interval: 5
EnableIPv6: no
Include: /etc/mrtg/router.cfg
Include: /etc/mrtg/switch1.cfg
Include: /etc/mrtg/switch2.cfg
Include: /etc/mrtg/ciscoswitch_cpu.cfg
Include: /etc/mrtg/server1.cfg
Include: /etc/mrtg/squid_server.cfg
Include: /etc/mrtg/ups.cfg
...
Each config file has its own LoadMIBs, when needed. This particular
server is the 3rd in the config that uses LoadMIBs, and it's the only
one that loads the squid mib. None of my other configs have trouble
loading mib files that others aren't using. (ie: my ups config, which
comes later in daemon_mode.cfg)
In daemon mode this target works:
Target[squid_server-reqhitratios]:
cacheRequestHitRatio.5&cacheRequestHitRatio.60:community@server:3401
It graphs perfectly fine, with no errors.
In daemon mode this target causes an error:
Target[squid_server-hit]:
cacheHttpHits&cacheServerRequests:community@server:3401
In my mrtg.log I get:
2008-03-26 15:01:15 -- Unknown SNMP var cacheServerRequests
at /usr/bin/mrtg line 2199
However, cacheServerRequests is declared in the same mibfile as
cacheRequestHitRatio.
My loadmib for squid_server.cfg looks like:
LoadMIBs: /usr/share/snmp/mibs/SQUID-MIB.txt,
/usr/share/snmp/mibs/UCD-SNMP-MIB.txt
And I can verify that variable in that same mibfile works properly with
snmpget:
# snmpget -m /usr/share/snmp/mibs/SQUID-MIB.txt -v1 -c community
squid_server:3401 cacheServerRequests
SQUID-MIB::cacheServerRequests.0 = INTEGER: 4715641
I can also verify that neither variable works without manually loading
the mibfile:
# snmpget -v1 -c community squid_server:3401 cacheServerRequests
cacheServerRequests: Unknown Object Identifier (Sub-id not found: (top)
-> cacheServerRequests)
# snmpget -v1 -c community squid_server:3401 cacheRequestHitRatio
cacheRequestHitRatio: Unknown Object Identifier (Sub-id not found: (top)
-> cacheRequestHitRatio)
What would cause a mibfile to work with snmpget, work with both MRTGs
manually, work in daemon mode on 2.11.1 but only partially work with
MRTG in Daemon mode in 2.16.1? Is it unreasonable for me to have
multiple LoadMIB statements about?
I've also already verified no other mib file on the system declares
anything named cacheServerRequests:
# grep "cacheServerRequests" /usr/share/snmp/mibs/*
/usr/share/snmp/mibs/SQUID-MIB.txt: cacheServerRequests
OBJECT-TYPE
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<div class=Section1>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have a squid monitoring configuration, which I recently
ported from one server that uses mrtg-2.11.1 onto a server running \
mrtg-2.16.1.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>On 2.11.1 I had no problems at all with this config, using
the same daemon_mode.cfg and everything.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I brought over my MRTG config, copied my squid mibfile, etc
onto the new server. My switch configs are different in that I regenerated them
using snmp v2 commands, due to the overflows.. however, even prior to that the
squid config wasn’t working on the new box.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>What’s strange is, mrtg-2.116.1 appears to parse some
of the variables out of my squid mibfile when operated in daemon mode, but
parses other variables out of the same mibfile just \
fine.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>If I run the config manually, i.e.:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>env LANG=C /usr/bin/mrtg --logging /var/log/mrtg.log \
squid_server.cfg<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>All works fine.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>If I load it with my daemon mode config, it starts to \
break.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>My init script sets LANG=C near the top of the file, and
passes mrtg: the following parameters: /etc/mrtg/daemon_mode.cfg --logging
/var/log/mrtg.log<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>My daemon_mode.cfg looks like this (actual server names
removed):<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>RunAsDaemon: Yes<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Interval: 5<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>EnableIPv6: no<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Include: /etc/mrtg/router.cfg<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Include: /etc/mrtg/switch1.cfg<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Include: /etc/mrtg/switch2.cfg<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Include: \
/etc/mrtg/ciscoswitch_cpu.cfg<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Include: /etc/mrtg/server1.cfg<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Include: /etc/mrtg/squid_server.cfg<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Include: /etc/mrtg/ups.cfg<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>...<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Each config file has its own LoadMIBs, when needed. This
particular server is the 3<sup>rd</sup> in the config that uses LoadMIBs, and
it’s the only one that loads the squid mib. None of my other configs have
trouble loading mib files that others aren’t using. (ie: my ups config,
which comes later in daemon_mode.cfg)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>In daemon mode this target works:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Target[squid_server-reqhitratios]:
cacheRequestHitRatio.5&cacheRequestHitRatio.60:community@server:3401<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>It graphs perfectly fine, with no \
errors.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>In daemon mode this target causes an \
error:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Target[squid_server-hit]:
cacheHttpHits&cacheServerRequests:community@server:3401<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>In my mrtg.log I get:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>2008-03-26 15:01:15 -- Unknown SNMP var \
cacheServerRequests<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> at /usr/bin/mrtg line 2199<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>However, cacheServerRequests is declared in the same mibfile
as cacheRequestHitRatio.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>My loadmib for squid_server.cfg looks \
like:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>LoadMIBs: /usr/share/snmp/mibs/SQUID-MIB.txt,
/usr/share/snmp/mibs/UCD-SNMP-MIB.txt<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>And I can verify that variable in that same mibfile works
properly with snmpget:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'># snmpget -m /usr/share/snmp/mibs/SQUID-MIB.txt –v1 -c
community squid_server:3401 cacheServerRequests<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>SQUID-MIB::cacheServerRequests.0 = INTEGER: \
4715641<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I can also verify that neither variable works without
manually loading the mibfile:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'># snmpget -v1 -c community squid_server:3401
cacheServerRequests<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>cacheServerRequests: Unknown Object Identifier (Sub-id not
found: (top) -> cacheServerRequests)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'># snmpget -v1 -c community squid_server:3401
cacheRequestHitRatio<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>cacheRequestHitRatio: Unknown Object Identifier (Sub-id not
found: (top) -> cacheRequestHitRatio)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>What would cause a mibfile to work with snmpget, work with both
MRTGs manually, work in daemon mode on 2.11.1 but only partially work with MRTG
in Daemon mode in 2.16.1? Is it unreasonable for me to have multiple
LoadMIB statements about?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I’ve also already verified no other mib file on the
system declares anything named cacheServerRequests:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'># grep "cacheServerRequests"
/usr/share/snmp/mibs/*<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>/usr/share/snmp/mibs/SQUID-MIB.txt:
cacheServerRequests OBJECT-TYPE<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>#<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
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