Observium - Not finding MIBs modules. "Cannot find module (SNMPv2-MIB): At line 1 in (none) [etc]"

[JedMeister]

As reported in the forums when running Observium,

root@observium /opt/observium# ./discovery.php -u
MIB search path: /opt/observium/mibs
Cannot find module (SNMPv2-MIB): At line 1 in (none)
Cannot find module (IF-MIB): At line 1 in (none)
Cannot find module (IP-MIB): At line 1 in (none)
Cannot find module (TCP-MIB): At line 1 in (none)
Cannot find module (UDP-MIB): At line 1 in (none)
Cannot find module (HOST-RESOURCES-MIB): At line 1 in (none)
Cannot find module (NOTIFICATION-LOG-MIB): At line 1 in (none)
Cannot find module (DISMAN-EVENT-MIB): At line 1 in (none)
Cannot find module (DISMAN-SCHEDULE-MIB): At line 1 in (none)
Cannot find module (HOST-RESOURCES-TYPES): At line 1 in (none)
Cannot find module (MTA-MIB): At line 1 in (none)
Cannot find module (NETWORK-SERVICES-MIB): At line 1 in (none)
Cannot find module (UCD-DISKIO-MIB): At line 1 in (none)
Cannot find module (UCD-DLMOD-MIB): At line 1 in (none)
Cannot find module (LM-SENSORS-MIB): At line 1 in (none)
Cannot find module (UCD-SNMP-MIB): At line 1 in (none)
Cannot find module (UCD-DEMO-MIB): At line 1 in (none)
Cannot find module (SNMP-TARGET-MIB): At line 1 in (none)
Cannot find module (NET-SNMP-AGENT-MIB): At line 1 in (none)
Cannot find module (SNMP-MPD-MIB): At line 1 in (none)
Cannot find module (SNMP-USER-BASED-SM-MIB): At line 1 in (none)
Cannot find module (SNMP-FRAMEWORK-MIB): At line 1 in (none)
Cannot find module (SNMP-VIEW-BASED-ACM-MIB): At line 1 in (none)
Cannot find module (SNMP-COMMUNITY-MIB): At line 1 in (none)
Cannot find module (IPV6-ICMP-MIB): At line 1 in (none)
Cannot find module (IPV6-MIB): At line 1 in (none)
Cannot find module (IPV6-TCP-MIB): At line 1 in (none)
Cannot find module (IPV6-UDP-MIB): At line 1 in (none)
Cannot find module (IP-FORWARD-MIB): At line 1 in (none)
Cannot find module (NET-SNMP-PASS-MIB): At line 1 in (none)
Cannot find module (NET-SNMP-EXTEND-MIB): At line 1 in (none)
Cannot find module (SNMP-NOTIFICATION-MIB): At line 1 in (none)
Cannot find module (SNMPv2-TM): At line 1 in (none)
Cannot find module (NET-SNMP-VACM-MIB): At line 1 in (none)

So something is clearly not right...

After a ton of researching, reading and trial and error, I think I've worked it out. At least I've worked out how to stop the error messages (without removing php-snmp modules as some people suggested on Stack Overflow - sure it stops the error, but then Observium won't work at all...).

It turns out that the default snmp.conf that we ship with has a missing +. This sed line will fix it:

sed -i "s|mibdirs /opt/observium/mibs|mibdirs +/opt/observium/mibs|" /etc/snmp/snmp.conf 

[adamathefrog]

It's actually not necessary to have /opt/observium/mibs in there at all, we always call the mib directories directly, and there's nothing usable in that directory without specifying subdirectories. /etc/snmp.conf should probably be left as default.

The difference between the + and not is that without the plus it was overwriting the hardcoded directory, with the plus it doesn't.

The error is just because an snmp command is being called without arguments, and it's compiled to expect the default snmp mibs in a certain place. so long as these are installed, it's fine.

You /could/ put :

mibdirs /opt/observium/mibs/rfc:/opt/observium/mibs/net-snmp

Those would be our versions of the RFC and Net-SNMP "standard" mibs, which may or may not be newer than the ones in the distro, but since there's no real difference and it's an unnecessary change, probably better to just ship with the distro's default snmp.conf.

[JedMeister]

@adamathefrog - Thanks so much for your input here (and apologies for my slow response...)! We'll follow your suggest for the next release! 👍