Ubuntu 12.04: monitor system resource with netmrg

Here are trial and error logs when installing netmrg.

about netmrg

http://www.netmrg.net/

# tail -1 /etc/lsb-release ;uname -ri DISTRIB_DESCRIPTION="Ubuntu 12.04.4 LTS" 3.2.0-58-virtual x86_64

The installation procedures are:

- install mysql and create a database for netmrg

- install net-snmp and MIB files

- install netmrg and configure it

at first, install mysql server and run mysql server before installing netmrg

# apt-get install mysql-server

confirm that mysql is running.

# pgrep mysql 4875 5370

then, install netmrg.

# apt-get install netmrg

during the installation, you will be asked for the database name for netmrg.

I use “netmrg” as database name which is default setting.

confirm “netmrg” database exits.

# mysql -u root -p Enter password: Welcome to the MySQL monitor.  Commands end with ; or \g. Your MySQL connection id is 65 Server version: 5.5.34-0ubuntu0.12.04.1 (Ubuntu) Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> show databases; +--------------------+ | Database           | +--------------------+ | information_schema | | mysql              | | netmrg             | | performance_schema | | test               | +--------------------+ 5 rows in set (0.00 sec) mysql> quit Bye

edit apache2.conf

# tail -1 /etc/apache2/apache2.conf Include /etc/netmrg/netmrg.conf

start httpd.

# apachectl start

access to http:// IP /netmrg

The default login is admin and the default password is nimda

collect data every 5 minutes

# pwd /etc/cron.d # cat netmrg # # Regular cron jobs for the netmrg package # */5 * * * * netmrg test -x /usr/bin/netmrg-gatherer && /usr/bin/netmrg-gatherer -l31

how can I manage my ubuntu box?

Seen from documents (http://wiki.netmrg.net/wiki/Basic_Tutorial), need to add the device which I would like to monitor.

Before adding the device, install net-snmp.

# apt-get install snmp snmpd

edit /etc/snmp/snmpd.conf

# egrep -v ^# /etc/snmp/snmpd.conf | grep -v ^$ | grep -v "#" view   systemonly  included   .1 rocommunity public  localhost rocommunity public  default    -V systemonly rouser   authOnlyUser sysLocation    Sitting on the Dock of the Bay sysContact     Me <me@example.org> sysServices    72 proc  mountd proc  ntalkd    4 proc  sendmail 10 1 disk       /     10000 disk       /var  5% includeAllDisks  10% load   12 10 5 trapsink     localhost public iquerySecName   internalUser rouser          internalUser defaultMonitors          yes linkUpDownNotifications  yes extend    test1   /bin/echo  Hello, world! extend-sh test2   echo Hello, world! ; echo Hi there ; exit 35 master          agentx

restart snmpd

# service snmpd restart

issue snmpbulkwalk to check you can get information.

# snmpbulkwalk -v 2c -c public 127.0.0.1 . | head -3 iso.3.6.1.2.1.1.1.0 = STRING: "Linux ubuntu 3.2.0-58-virtual #88-Ubuntu SMP Tue Dec 3 17:58:13 UTC 2013 x86_64" iso.3.6.1.2.1.1.2.0 = OID: iso.3.6.1.4.1.8072.3.2.10 iso.3.6.1.2.1.1.3.0 = Timeticks: (4057) 0:00:40.57

On the netmrg GUI, add the device.

Admin tab -> Add

clieck group “HOME” -> Add in the Monitored Devices section -> Create a new device

create a new sub device

sub-device type: Group

add graph you want to monitor

can’t see the graph.

Seen from the GUI, SNMP failed..

rrd files are stored under /var/lib/netmrg/rrd directory for sure.

# pwd /var/lib/netmrg/rrd # ls mon_27.rrd  mon_29.rrd  mon_31.rrd  mon_33.rrd  mon_35.rrd  mon_37.rrd mon_28.rrd  mon_30.rrd  mon_32.rrd  mon_34.rrd  mon_36.rrd  zero.rrd

Googling “netmrg snmp failed”, it seems that I need to install MIB files.

# apt-get install snmp-mibs-downloader # download-mibs

edit /etc/snmp/snmp.conf

# egrep -v ^# /etc/snmp/snmp.conf mibs +ALL

okay.