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Nagios Installation Script

·1104 words·6 mins· 0 · 0 ·
Vimal A R
Author
Vimal A R
Still figuring it out!

This is a bash script which automates the installation of Nagios. There are more things to do such as setup of service monitoring, but that's for another time.

[code language="bash"] #!/bin/bash DOWNLOAD_LOCATION='/root/Downloads/' NAGIOS_URL='http://jaist.dl.sourceforge.net/sourceforge/nagios/nagios-2.9.tar.gz' APACHE_CONF='/etc/httpd/conf/httpd.conf' NAGIOS_PLUGIN='http://nchc.dl.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.8.tar.gz' NAGIOSHOME='/usr/local/nagios' DATE=`date +%d-%b-%Y` FILE='/root/Nagios.txt'

################################# # [1]   Installing nagios       # ################################# nagios_download () { clear

if [ `id -u` -ne 0 ]; then echo -e "You are executing the script as $USER\n" echo -e "You must be root to execute this script..\n"; echo -e "Sorry...Exiting..\n";exit 111; else if [ ! -e /root/Nagios.txt ]; then touch /root/Nagios.txt; else mv /root/Nagios.txt /root/Nagios-$DATE.txt; touch /root/Nagios.txt; fi

echo -e "            [@@@@@@@@@@@@@@@@@@@@@@@@@ NAGIOS INSTALL SCRIPT @@@@@@@@@@@@@@@@@@@@@@@@@]\n";sleep 1s echo -e "                                           ...Welcome...\n"|tee -a $FILE;sleep 1s echo "[Starting the Nagios Installation Process :-]"|tee -a $FILE; echo "---------------------------------------------"|tee -a $FILE;echo;sleep 1s fi

if [ ! -e $DOWNLOAD_LOCATION ]; then echo "$DOWNLOAD_LOCATION does not exist, creating......."|tee -a $FILE;sleep 1s mkdir -pv $DOWNLOAD_LOCATION;echo fi

echo "[Downloading the nagios tar-ball to $DOWNLOAD_LOCATION :-]"|tee -a $FILE; echo "--------------------------------------------------------"|tee -a $FILE;echo;sleep 1s

cd $DOWNLOAD_LOCATION && wget --progress=dot $NAGIOS_URL;echo echo -e "Extracting the archive....\n"|tee -a $FILE;sleep 1s cd $DOWNLOAD_LOCATION && tar -zxf nagios*gz && mv nagios*gz Nagios-$DATE.tar.gz;echo }

nagios_usercheck () { echo "[Checking the existence of user/group 'nagios' :-]"|tee -a $FILE; echo "--------------------------------------------------"|tee -a $FILE;

grep -q nagios /etc/group > /dev/null if [ $? = 0 ];then echo "Group 'nagios' exist"|tee -a $FILE; else echo "Adding group 'nagios'"|tee -a $FILE; /usr/sbin/groupadd nagios fi

grep -q nagios /etc/passwd > /dev/null if [ $? = 0 ];then echo "User 'nagios' exists"|tee -a $FILE; else echo "Adding user 'nagios'"|tee -a $FILE; /usr/sbin/useradd -d $NAGIOSHOME -g nagios -s /bin/false -m nagios fi;echo

echo "[Checking the existence of user/group 'nagcmd' :-]"|tee -a $FILE; echo "--------------------------------------------------"|tee -a $FILE;

grep -q nagcmd /etc/group; if [ $? = 0 ];then echo "Group 'nagcmd' exists"|tee -a $FILE; else echo "Adding group 'nagcmd'"|tee -a $FILE; /usr/sbin/groupadd nagcmd; fi

grep -q nagcmd /etc/passwd; if [ $? = 0 ];then echo "User 'nagcmd' exists"|tee -a $FILE; else echo "Adding user 'nagcmd'"|tee -a $FILE; /usr/sbin/useradd -g nagcmd -s /bin/false -m nagcmd; fi; echo }

nagios_previouscheck () { echo "[Checking for previous installations :-]"|tee -a $FILE echo "----------------------------------------"|tee -a $FILE;sleep 1s

if [ -d /usr/local/nagios ]; then echo "Installation directory '/usr/local/nagios/' already exist."|tee -a $FILE echo "Moving '/usr/local/nagios/' to '/usr/local/Nagios-$DATE.back'"|tee -a $FILE mv -v /usr/local/nagios /usr/local/Nagios-$DATE.back;echo echo "Creating the Installation Directory for Nagios [/usr/local/nagios/]"|tee -a $FILE mkdir -pv /usr/local/nagios;echo else echo "Nagios installation not found at the default location of $NAGIOSHOME"; echo "Creating the Installation Directory for Nagios [/usr/local/nagios/]"|tee -a $FILE mkdir -pv /usr/local/nagios;echo fi }

nagios_ownership () { echo "[Setting appropriate ownership on the installation directory]"|tee -a $FILE echo "-------------------------------------------------------------" chown -v nagios.nagios /usr/local/nagios;echo;sleep 1s

echo "[Checking the Web-Server user/group :-]"|tee -a $FILE echo "---------------------------------------"|tee -a $FILE;sleep 1s

echo "Web-Server User  : `grep "^User" $APACHE_CONF|head -n1|awk '{print $2}'`"|tee -a $FILE echo "Web-Server Group : `grep "^Group" $APACHE_CONF|head -n1|awk '{print $2}'`"|tee -a $FILE;echo;sleep 1s

echo "[Adding the Web-Server/Nagios user to the 'nagcmd' group]"|tee -a $FILE; echo "---------------------------------------------------------" /usr/sbin/usermod -G nagcmd `grep "^User" $APACHE_CONF|head -n1|awk '{print $2}'` && \ echo "Added the user `grep "^User" $APACHE_CONF|head -n1|awk '{print $2}'` to the 'nagcmd' group."|tee -a $FILE sleep 1s /usr/sbin/usermod -G nagcmd nagios && echo -e "Added the user 'nagios' to the 'nagcmd' group.\n"|tee -a $FILE;sleep 1s echo }

nagios_configure () { echo "[Starting the Nagios 'configure' script :-]"|tee -a $FILE; echo "-------------------------------------------"|tee -a $FILE;sleep 4s

cd $DOWNLOAD_LOCATION/nagios* && ./configure --with-command-group=nagcmd && make all && make install && make install-config && make install-init && make install-commandmode echo }

################################# # [2] Installing Nagios Plugins # #################################

nagios_plugins () { sleep 4s echo -e "           [@@@@@@@@@@@@@@@@@@@@@@@@@ NAGIOS PLUGIN SETUP @@@@@@@@@@@@@@@@@@@@@@@@@]\n"|tee -a $FILE;sleep 2s

echo "[Downloading the 'nagios-plugins' tarball :-]"|tee -a $FILE; echo "---------------------------------------------";sleep 3s cd $DOWNLOAD_LOCATION && wget --progress=dot $NAGIOS_PLUGIN;echo echo "[Extracting the plugins archive :-]"|tee -a $FILE; echo "-----------------------------------";sleep 1s cd $DOWNLOAD_LOCATION && tar -zxf nagios-plugins*gz && mv nagios-plugins*gz Nagios-plugins-$DATE.tar.gz;echo echo "[Configuring and compiling nagios-plugins :-]"|tee -a $FILE; echo "---------------------------------------------"|tee -a $FILE;sleep 1s cd $DOWNLOAD_LOCATION && cd nagios-plugins* && ./configure && make && make install && echo && echo -e "[Nagios Plugin Setup Finished.]\n" } echo;echo;sleep 3s

################################# # [3]  Configuring Nagios       # ################################# nagios_conf_files () { echo "[Creating the minimal configuration files :-]"; echo "---------------------------------------------";sleep 2s cp -apv $NAGIOSHOME/etc/nagios.cfg-sample $NAGIOSHOME/etc/nagios.cfg cp -apv $NAGIOSHOME/etc/commands.cfg-sample $NAGIOSHOME/etc/commands.cfg cp -apv $NAGIOSHOME/etc/resource.cfg-sample $NAGIOSHOME/etc/resource.cfg cp -apv $NAGIOSHOME/etc/localhost.cfg-sample $NAGIOSHOME/etc/localhost.cfg cp -apv $NAGIOSHOME/etc/cgi.cfg-sample $NAGIOSHOME/etc/cgi.cfg;echo

echo "[Setting administrative rights for 'nagiosadmin']" echo "-------------------------------------------------";sleep 2s;echo echo "" >> $NAGIOSHOME/etc/cgi.cfg echo -e "#Setting administrative rights for 'nagiosadmin'\n" >> $NAGIOSHOME/etc/cgi.cfg

echo "authorized_for_system_information=nagiosadmin authorized_for_configuration_information=nagiosadmin authorized_for_system_commands=nagiosadmin authorized_for_all_services=nagiosadmin authorized_for_all_hosts=nagiosadmin authorized_for_all_service_commands=nagiosadmin authorized_for_all_host_commands=nagiosadmin" >> $NAGIOSHOME/etc/cgi.cfg

echo "[Creating additional configuration files :-]"; echo "--------------------------------------------";sleep 2s touch $NAGIOSHOME/etc/hosts.cfg; if [ $? -eq 0 ];then echo "Created $NAGIOSHOME/etc/hosts.cfg";else echo "Failed creating $NAGIOSHOME/etc/hosts.cfg";fi touch $NAGIOSHOME/etc/hostgroups.cfg; if [ $? -eq 0 ];then echo "Created $NAGIOSHOME/etc/hostgroups.cfg";else echo "Failed creating $NAGIOSHOME/etc/hostgroups.cfg";fi touch $NAGIOSHOME/etc/contacts.cfg; if [ $? -eq 0 ];then echo "Created $NAGIOSHOME/etc/contacts.cfg";else echo "Failed creating $NAGIOSHOME/etc/contacts.cfg";fi touch $NAGIOSHOME/etc/contactgroups.cfg; if [ $? -eq 0 ];then echo "Created $NAGIOSHOME/etc/contactgroups.cfg";else echo "Failed creating $NAGIOSHOME/etc/contactgroups.cfg";fi touch $NAGIOSHOME/etc/services.cfg; if [ $? -eq 0 ];then echo "Created $NAGIOSHOME/etc/services.cfg";else echo "Failed creating $NAGIOSHOME/etc/services.cfg";fi touch $NAGIOSHOME/etc/timeperiods.cfg; if [ $? -eq 0 ];then echo "Created $NAGIOSHOME/etc/timeperiods.cfg";else echo "Failed creating $NAGIOSHOME/etc/timeperiods.cfg";fi; echo

echo "[Changing the ownership of newly created files :-]"; echo "--------------------------------------------------";sleep 2s chown -Rv nagios.nagios $NAGIOSHOME/etc/* echo

echo "" >> $NAGIOSHOME/etc/nagios.cfg echo "[Setting config: file paths in $NAGIOSHOME/etc/nagios.cfg :-]"; echo "------------------------------------------------------------------";echo;sleep 2s echo -e "#Setting configuration file paths.\n" >> $NAGIOSHOME/etc/nagios.cfg echo "cfg_file=/usr/local/nagios/etc/hosts.cfg cfg_file=/usr/local/nagios/etc/hostgroups.cfg cfg_file=/usr/local/nagios/etc/services.cfg cfg_file=/usr/local/nagios/etc/contacts.cfg cfg_file=/usr/local/nagios/etc/contactgroups.cfg cfg_file=/usr/local/nagios/etc/timeperiods.cfg" >> $NAGIOSHOME/etc/nagios.cfg

echo echo "[Running the Nagios Syntax Check :-]"; echo "------------------------------------";sleep 1s $NAGIOSHOME/bin/nagios -v $NAGIOSHOME/etc/nagios.cfg;echo }

################################# # [4]   Setting Up Apache       # #################################

nagios_apache () { echo "[Setting up Apache Web-Interface :-]" echo "------------------------------------"

grep -q "### Nagios Script Alias ###" $APACHE_CONF;

if [ $? -eq 0 ];then echo -e "ScriptAlias for nagios already exists in $APACHE_CONF\n" /etc/init.d/httpd restart > /dev/null else

echo "" >> $APACHE_CONF echo -e "### Nagios Script Alias ###\n" >> $APACHE_CONF;

echo -e "ScriptAlias /nagios/cgi-bin /usr/local/nagios/sbin \n

Options ExecCGI AllowOverride None Order allow,deny Allow from all AuthName \"Nagios Access\" AuthType Basic AuthUserFile /usr/local/nagios/etc/htpasswd.users Require valid-user    \n" >> $APACHE_CONF

echo -e "Alias /nagios /usr/local/nagios/share  \n

Options None AllowOverride None Order allow,deny Allow from all AuthName \"Nagios Access\" AuthType Basic AuthUserFile /usr/local/nagios/etc/htpasswd.users Require valid-user    \n" >> $APACHE_CONF

echo "Added the needed Alias configurations in $APACHE_CONF"

echo -e "Restarting the Web-Server...please wait..\n" /etc/init.d/httpd restart; fi }

nagios_htpasswd () { echo "[Creating the login credentials for the nagios URL :-]" echo "------------------------------------------------------"; echo "Username    : nagiosadmin" htpasswd -c $NAGIOSHOME/etc/htpasswd.users nagiosadmin;echo echo -e "Login to the Nagios Interface is now restricted to user 'nagiosadmin'.\n" }

nagios_download && nagios_usercheck && nagios_previouscheck && nagios_ownership && nagios_configure && nagios_plugins && nagios_conf_files && nagios_apache && nagios_htpasswd [/code]