Nagios: howto become a happy network and system monitoring engineer

vi /etc/inittab
shutdown -r 0

yum -y install gcc perl-Config-IniFiles net-snmp net-snmp-perl net-snmp-utils perl-Net-SNMP net-snmp-libs

cd /tmp/
wget http://downloads.sourceforge.net/nagiosplug/nagios-plugins-1.4.9.tar.gz?modtime=1180952247&big_mirror=0
wget http://downloads.sourceforge.net/nagiosplug/nagios-plugins-1.4.9.tar.gz?modtime=1180952247&big_mirror=0
tar xvzf nagios-2.9.tar.gz
rm nagios-2.9.tar*
cd nagios-2.9
adduser nagios
mkdir /usr/local/nagios
chown nagios:nagios /usr/local/nagios
grep “^User” /etc/httpd/conf/httpd.conf
/usr/sbin/groupadd nagcmd
/usr/sbin/usermod -G nagcmd apache
/usr/sbin/usermod -G nagcmd nagios

./configure –prefix=/usr/local/nagios –with-command-group=nagcmd
make all
make install
make install-init
chkconfig –add nagios
service nagios status
cd /usr/local/nagios/
chown -R nagios:nagios etc/
ln -s /usr/local/nagios/etc/apache/nagios.conf /etc/httpd/conf.d/nagios.conf
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

rsync -avu root@cacti.elisabeth.nl:/usr/local/nagios/etc /usr/local/nagios/
rsync -avu root@cacti.elisabeth.nl:/usr/local/nagios/libexec /usr/local/nagios/
mv share share.bak
rsync -avu root@cacti.elisabeth.nl:/usr/local/nagios/share /usr/local/nagios/
system-config-securitylevel-tui
service httpd start

/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

tar xvzf nagiosgraph-0.9.0.tgz
cd nagiosgraph-0.9.0
mkdir /usr/local/nagios/nagiosgraph
cp nagiosgraph.conf /usr/local/nagios/nagiosgraph/
cp map /usr/local/nagios/nagiosgraph/
cp insert.pl /usr/local/nagios/nagiosgraph/
cp show.cgi /usr/local/nagios/nagiosgraph/
vi /usr/local/nagios/nagiosgraph/nagiosgraph.conf

ls -ald /var/log
touch /usr/local/nagios/var/nagiosgraph.log
chown nagios:nagios /usr/local/nagios/var/nagiosgraph.log
vi /usr/local/nagios/nagiosgraph/nagiosgraph.conf
mkdir /usr/local/nagios/nagiosgraph/rrd
chown nagios:nagios /usr/local/nagios/nagiosgraph/rrd
chown -R nagios:nagios /usr/local/nagios/nagiosgraph
vi /usr/local/nagios/nagiosgraph/nagiosgraph.conf
updatedb
locate perfdata.log
touch /usr/local/nagios/var/perfdata.log
vi /usr/local/nagios/nagiosgraph/nagiosgraph.conf

cd /usr/local/nagios/nagiosgraph/
vi insert.pl
vi show.cgi

chown nagios:nagios /usr/local/nagios/var/perfdata.log
chmod 664 /usr/local/nagios/var/nagiosgraph.log
chmod 664 /usr/local/nagios/var/perfdata.log
chmod 775 /usr/local/nagios/nagiosgraph/rrd/

chown nagios:nagios ../../var/nagiosgraph.log
chmod 666 ../../var/nagiosgraph.log
perl-Config-IniFiles

yum -y install perl-Config-IniFiles

[root@cacti ~]# scp /lib/libssl.so.5 root@10.20.2.26:/lib/
root@10.20.2.26’s password:
libssl.so.5 100% 225KB 224.7KB/s 00:00
[root@cacti ~]# scp /lib/libcrypto.so.5 root@10.20.2.26:/lib/
root@10.20.2.26’s password:
libcrypto.so.5

ldconfig

NagiosPlugin NSCA
——————

tar xvzf nsca-2.7.2.tar.gz
cd nsca-2.7.2
./configure
make all
cp src/nsca /usr/local/nagios/bin
cp /tmp/nsca-2.7.2/sample-config/nsca.cfg /usr/local/nagios/etc/nsca.conf
cp /tmp/nsca-2.7.2/sample-config/nsca.xinetd /etc/xinetd.d/nsca

vi /etc/services

nsca 5667/tcp # NSCA

vi README
touch /etc/xinetd.d/nsca

[root@cacti ~]# vi /etc/xinetd.d/nsca
# default: on
# description: NSCA (Nagios Service Check Acceptor)
service nsca
{
flags = REUSE
socket_type = stream
wait = no
user = nagios
group = nagios
server = /usr/local/nagios/bin/nsca
server_args = -c /usr/local/nagios/etc/nsca.cfg –inetd
log_on_failure += USERID
disable = no
#only_from = 127.0.0.1 ezhdevdb02 ezhcom02 ezhcom01
}

cd /usr/local/nagios/var
touch nsca.dump
chown nagios:nagios nsca.dump
chmod 660 nsca.dump
vi /usr/local/nagios/etc/nsca.cfg

command_file=/usr/local/nagios/var/rw/nagios.cmd
alternate_dump_file=/usr/local/nagios/var/nsca.dump

yum install xinetd
chkconfig –add xinetd
chkconfig –level 3 xinetd on
service xinetd start
chkconfig –list
# system-config-securitylevel
add port 5667

example command for executing send_nsca on the commandline:
<servername>;adt-endo_adt;2;TESTJE”| /usr/local/nagios/bin/send_nsca -H <ip_adress_hostserver> -d “;” -c /usr/local/nagios/etc/send_nsca.cfg