[collectd] syntax to collect snmpd 'extend' script results ?
octo at verplant.org
Mon Jul 6 14:22:19 CEST 2009
On Tue, Jun 30, 2009 at 04:17:22PM -0400, L. Gabriel Somlo wrote:
> I have a bunch of scripts running on a server, each returning a
> current count of some value, which increments over time.
> I've added the following to my /etc/snmp/snmpd.conf:
good science!  Why would you do that? It'd be probably much more
elegant to let the `exec' plugin  handle that.
> I would like to collect these with collectd via snmp, and here's
> what's in my /etc/collectd.d/snmp.conf file:
Could you provide an SNMP-walk for those trees please?
> <Data "host_load">
> Type "host_load"
> Table false
> Values "UCD-SNMP-MIB::laLoadInt.1" "UCD-SNMP-MIB::laLoadInt.2" "UCD-SNMP-MIB::laLoadInt.3"
> snmp plugin: DataSet `host_load' not defined
This happens because collectd doesn't know how the data is structured.
It tries to find out by looking up the `host_load' “type” which doesn't
exist. Please see the types.db(5) manual page for a description of how
to add a custom type. The `TypesDB' option in collectd.conf(5) may be of
> <Data "host_extend">
> Type "host_dns"
> Table true
> Values "NET-SNMP-EXTEND-MIB::nsExtendOutput2Table"
`host_dns' isn't a standard type, either, you will have to define that,
> and complete silence on host_extend...
This shouldn't be.. Can you resolve the OID-name without extra arguments
using `snmptranslate'? Maybe the tree can be fetched but not
interpreted? Can you maybe use tcpdump or wireshark to see if some
communication between collectd and snmpd takes place?
 I hope there are some SouthPark fans out there ;)
Florian octo Forster
Hacker in training
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