SNMP on Ubuntu


Found this SNMP guide for installing on Ubuntu.  Last install for me was from my System76 box.

This guide describe howto install and configure SNMP on Ubuntu.

1.Installation

root@ibsen:~# sudo apt-get install snmpd Reading package lists… Done Building dependency tree       Reading state information… Done The following packages were automatically installed and are no longer required:   libmpich1.0gf libdc1394-22 genisoimage linux-headers-2.6.27-7 libgfortran2 dvd+rw-tools linux-headers-2.6.27-7-generic libcarp-clan-perl libxml-xql-perl libparse-yapp-perl   rdate python-xml localechooser-data gcc-4.2-base libimage-size-perl libdebconfclient0 libvisual-0.4-0 libmyth-python perlmagick libvisual-0.4-plugins libavdevice52 Use ‘apt-get autoremove’ to remove them. The following extra packages will be installed:   libperl5.10 libsensors3 libsnmp-base libsnmp15 Suggested packages:   lm-sensors The following NEW packages will be installed:   libperl5.10 libsensors3 libsnmp-base libsnmp15 snmpd 0 upgraded, 5 newly installed, 0 to remove and 3 not upgraded. Need to get 2463kB of archives. After this operation, 7987kB of additional disk space will be used. Do you want to continue [Y/n]?

answer y

2. Configuration

Move existing /etc/snmp/snmpd.conf configuration file to /etc/snmp/snmpd.conf.org

mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.org

Create a new /etc/snmp/snmpd.conf file:

rocommunity  public (change this for your use) syslocation  “Corporate Data Center” syscontact  ITDepartment@yourcompany.com

Make snmpd use the newly created file and make it listen to all interfaces:

Edit /etc/default/snmpd

Change from:

# snmpd options (use syslog, close stdin/out/err). SNMPDOPTS=’-Lsd -Lf /dev/null -u snmp -I -smux -p /var/run/snmpd.pid 127.0.0.1′

To:

# snmpd options (use syslog, close stdin/out/err). #SNMPDOPTS=’-Lsd -Lf /dev/null -u snmp -I -smux -p /var/run/snmpd.pid 127.0.0.1′ SNMPDOPTS=’-Lsd -Lf /dev/null -u snmp -I -smux -p /var/run/snmpd.pid -c /etc/snmp/snmpd.conf’

and restart snmpd

/etc/init.d/snmpd restart

3. Test

Do a snmpwalk from another host against your newly configured host.

[root@op5 ~]# snmpwalk -v 1 -c public -O e ibsen SNMPv2-MIB::sysDescr.0 = STRING: Linux ibsen 2.6.27-9-generic #1 SMP Thu Nov 20 21:57:00 UTC 2008 i686 SNMPv2-MIB::sysObjectID.0 = OID: NET-SNMP-MIB::netSnmpAgentOIDs.10 DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (68869) 0:11:28.69 SNMPv2-MIB::sysContact.0 = STRING: peter@it-slav.net SNMPv2-MIB::sysName.0 = STRING: ibsen SNMPv2-MIB::sysLocation.0 = STRING: “PDC, Peters DataCenter” SNMPv2-MIB::sysORLastChange.0 = Timeticks: (1) 0:00:00.01 SNMPv2-MIB::sysORID.1 = OID: SNMP-FRAMEWORK-MIB::snmpFrameworkMIBCompliance SNMPv2-MIB::sysORID.2 = OID: SNMP-MPD-MIB::snmpMPDCompliance SNMPv2-MIB::sysORID.3 = OID: SNMP-USER-BASED-SM-MIB::usmMIBCompliance SNMPv2-MIB::sysORID.4 = OID: SNMPv2-MIB::snmpMIB SNMPv2-MIB::sysORID.5 = OID: TCP-MIB::tcpMIB SNMPv2-MIB::sysORID.6 = OID: IP-MIB::ip

Yes it works!!

4. Monitor example

Below is an example of how it looks using Cacti.

Michael Coburn Cacti graph

Cacti Graph from Michael Coburn

 

 

 

 

 

 

 

5. Useful links

  • Net-SNMP, an open source implementation of SNMP

  • Cacti, an open source graph tool

  • Nagios, the number 1 monitor tool