Custom SNMP MIB on Galileo

[idata]

This is a quick write up on installing Net-SNMP and creating custom mibs on the Galileo. I am using the eglibc image here: http://downloadmirror.intel.com/25384/eng/iot-devkit-201510010757-mmcblkp0-galileo.direct.xz http://downloadmirror.intel.com/25384/eng/iot-devkit-201510010757-mmcblkp0-galileo.direct.xz

Why SNMP? Because much of the SCADA and IIoT infrastructure is monitored using tools like Nagios and SolarWinds etc.

wget http://downloads.sourceforge.net/project/net-snmp/net-snmp/5.7.3/net-snmp-5.7.3.tar.gz http://downloads.sourceforge.net/project/net-snmp/net-snmp/5.7.3/net-snmp-5.7.3.tar.gz

# We untar to /tmp to avoid long filename issues

tar -xvf net-snmp-5.7.3.tar.gz -C /tmp

cd /tmp

./configure --disable-ipv6 --disable-embedded-perl --without-perl-modules --disable-snmptrapd-subagent

# This takes some time, so nohup it

nohup make &

tail -f nohup.out

make install

# create the snmpd.conf

snmpconf

Select snmpd.conf

Select Access

Create readwrite and read only groups (I suggst galileo and galileo-rw)

finished

# create a custom MIB using a script called /usr/local/bin/temp.py

# this displays the temperature

1: Extending the Agent

1: run a simple command using exec()

ENTER

name: temperature

The path to the program to be run.: /usr/local/bin/temp.py

The arguments to pass to /usr/local/bin/temp.py:

finsihed

finished

quit

# Start snmp

# Move the config file to etc

mv snmpd.conf /etc/.

snmpd.conf -c /etc/snmpd.conf

Then you can test it.

# This will not show the custom mib

snmpwalk -c galileo -v2c 192.168.1.100

# Display the custom mib

snmpwalk -c galileo -v2c 192.168.1.100 nsExtendOutput1

NET-SNMP-EXTEND-MIB::nsExtendOutput1Line."temperature" = STRING: 82.66

NET-SNMP-EXTEND-MIB::nsExtendOutputFull."temperature" = STRING: 82.66

NET-SNMP-EXTEND-MIB::nsExtendOutNumLines."temperature" = INTEGER: 1

NET-SNMP-EXTEND-MIB::nsExtendResult."temperature" = INTEGER: 0

# Get just the OID

snmptranslate -On NET-SNMP-EXTEND-MIB::nsExtendOutput1Line.\"temperature\"

# Query by just the OID

snmpwalk -c galileo -v2c 192.168.1.100 .1.3.6.1.4.1.8072.1.3.2.3.1.1.11.116.101.109.112.101.114.97.116.117.114.101

NET-SNMP-EXTEND-MIB::nsExtendOutput1Line."temperature" = STRING: 81.78

[idata]

If you want to use SNMP but don't want to spend all the time compiling, I put the code here: https://github.com/joemcmanus/netsnmp-galileo GitHub - joemcmanus/netsnmp-galileo: A tar of net-snmp compiled for the Intel Galileo Gen 2

Just untar/gz and run make install.

-Joe