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+**If you found this page via Google, I would recommend to use [[check_mk_raw_centos]] instead. Using the 1.4 stable branch.**\\
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+====== Check_MK monitoring (from source) - CentOS7 ======
+Use this guide to install the latest version of Check_MK and Nagios.
+Prerequisites
+  * EPEL repository
+  * Disable SELinux. Normally i would let SELinux be enabled, but with a monitoring system it is one of the few exceptions I make. This service does too many things SELinux doesn't like.
+====Install packages====
+  * Install rrdtool: <code>yum install rrdtool perl-rrdtool</code>
+  * Install development tools: <code>yum groupinstall development tools</code>
+  * Install apache & php. <code>yum install httpd php</code>
+  * Install other requirements. <code>yum install gd gd-devel php-gd openssl-devel net-snmp net-snmp-utils policycoreutils-python dejavu-fonts-common dejavu-sans-mono-fonts dejavu-lgc-sans-mono-fonts</code>
+====Install Nagios 4====
+  * Create user and group.<code>useradd nagios
+groupadd nagcmd
+usermod -a -G nagcmd nagios
+usermod -G nagcmd apache</code>
+  * Download latest version.
+  * Extract. <code>tar zxvf nagios-4.0.8.tar.gz</code>
+  * Compile Nagios 4. <code>cd nagios-4.0.8
+./configure --with-command-group=nagcmd --prefix=/opt/nagios --exec-prefix=/opt/nagios
+make all
+make install
+make install-init
+make install-config
+make install-commandmode
+make install-webconf
+cp -R contrib/eventhandlers/ /opt/nagios/libexec/
+chown -R nagios:nagios /opt/nagios/libexec/eventhandlers</code>
+  * Test and start Nagios, it still uses legacy init:<code>/opt/nagios/bin/nagios -v /opt/nagios/etc/nagios.cfg
+service nagios start</code>
+  * Edit **/opt/nagios/etc/resource.cfg** <code>$USER1$=/opt/nagios-plugins/libexec</code>
+  * Add a default user for Web Interface Access <code>htpasswd -c /opt/nagios/etc/htpasswd.users nagiosadmin</code>
+  * Download latest Nagios plugins.
+  * Install Nagios Plugins: <code>cd
+tar zxvf nagios-plugins-2.0.3.tar.gz
+cd /tmp/nagios-plugins-2.0.3
+./configure --with-nagios-user=nagios --with-nagios-group=nagios --prefix=/opt/nagios-plugins --exec-prefix=/opt/nagios-plugins
+make
+make install</code>
+====Configure services and firewall====
+  * Service setup. <code>chkconfig --add nagios
+chkconfig --level 35 nagios on
+systemctl enable httpd</code>
+  * Open port 80 / 443: <code>firewall-cmd --permanent --zone public --add-service=http
+firewall-cmd --permanent --zone public --add-service=https
+firewall-cmd --reload</code>
+  * Give the Nagios localhost http check something. <code>touch /var/www/html/index.html</code>
+  * Start Apache, restart Nagios, it should be running on your webserver /nagios <code>service nagios restart
+systemctl start httpd</code>
+====Install PNP4Nagios====
+  * Download the latest PNP4nagios.
+  * Extract. <code>tar zxvf pnp4nagios.tgz</code>
+  * Compile.<code>cd pnp4nagios-0.6.25
+./configure --prefix=/opt/pnp4nagios --exec-prefix=/opt/pnp4nagios
+make all
+make fullinstall</code>
+  * Configure apache, edit **/etc/httpd/conf.d/pnp4nagios.conf** <code>AuthUserFile /opt/nagios/etc/htpasswd.users</code>
+  * Restart apache. <code>systemctl restart httpd</code>
+  * Configure Nagios to use PNP4nagios. Edit **/opt/nagios/etc/nagios.cfg**. <code>#
+# Bulk / NPCD mode
+#
+process_performance_data=1
+# *** the template definition differs from the one in the original nagios.cfg
+#
+service_perfdata_file=/opt/pnp4nagios/var/service-perfdata
+service_perfdata_file_template=DATATYPE::SERVICEPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tSERVICEDESC::$SERVICEDESC$\tSERVICEPERFDATA::$SERVICEPERFDATA$\tSERVICECHECKCOMMAND::$SERVICECHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$\tSERVICESTATE::$SERVICESTATE$\tSERVICESTATETYPE::$SERVICESTATETYPE$
+service_perfdata_file_mode=a
+service_perfdata_file_processing_interval=15
+service_perfdata_file_processing_command=process-service-perfdata-file
+# *** the template definition differs from the one in the original nagios.cfg
+#
+host_perfdata_file=/opt/pnp4nagios/var/host-perfdata
+host_perfdata_file_template=DATATYPE::HOSTPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tHOSTPERFDATA::$HOSTPERFDATA$\tHOSTCHECKCOMMAND::$HOSTCHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$
+host_perfdata_file_mode=a
+host_perfdata_file_processing_interval=15
+host_perfdata_file_processing_command=process-host-perfdata-file</code>
+  * Edit **/opt/nagios/etc/objects/commands.cfg** Disable sample performance data commands, add: <code>#
+# Bulk mode
+#
+define command {
+       command_name    process-service-perfdata-file
+       command_line    /opt/pnp4nagios/libexec/process_perfdata.pl --bulk /opt/pnp4nagios/var/service-perfdata
+}
+define command {
+       command_name    process-host-perfdata-file
+       command_line    /opt/pnp4nagios/libexec/process_perfdata.pl --bulk /opt/pnp4nagios/var/host-perfdata
+}</code>
+  * Remove install file. <code>rm /opt/pnp4nagios/share/install.php</code>
+  * Restart nagios. <code>service nagios restart</code>
+  * Open /pnp4nagios on your webserver, it might take a while before data has been processed and images are shown.
+====Install Check_MK====
+  * Install xinetd. <code>yum install xinetd
+service xinetd start
+chkconfig xinetd on</code>
+  * Download latest Check_MK version.
+  * Extract. <code>tar zxvf check_mk-1.2.6p1.tar.gz</code>
+  * Compile. <code>cd check_mk-1.2.6p1
+./setup.sh
+You have chosen the following directories:
+ Executable programs             /opt/check_mk/bin
+ Check_MK configuration          /opt/check_mk/etc
+ Check_MK software               /opt/check_mk/share
+ documentation                   /opt/check_mk/share/doc
+ check manuals                   /opt/check_mk/share/doc/check_mk/checks
+ working directory of Check_MK   /opt/check_mk/var/lib
+ extensions for agents           /usr/lib/check_mk_agent
+ configuration dir for agents    /etc/check_mk
+ Name of Nagios user             nagios
+ User of Apache process          apache
+ Common group of Nagios+Apache   nagcmd
+ Nagios binary                   /opt/nagios/bin/nagios
+ Nagios main configuration file  /opt/nagios/etc/nagios.cfg
+ Nagios object directory         /opt/nagios/etc/check_mk.d
+ Nagios startskript              /etc/init.d/nagios
+ Nagios command pipe             /opt/nagios/var/rw/nagios.cmd
+ Check results directory         /opt/nagios/var/spool/checkresults
+ Nagios status file              /opt/nagios/var/status.dat
+ Path to check_icmp              /opt/nagios-plugins/libexec/check_icmp
+ URL Prefix for Web addons       /
+ Apache config dir               /etc/httpd/conf.modules.d
+ HTTP authentication file        /opt/nagios/etc/htpasswd.users
+ HTTP AuthName                   Nagios Access
+ PNP4Nagios templates            /opt/pnp4nagios/share/templates
+ RRD files                       /opt/pnp4nagios/var/perfdata
+ rrdcached socket                /tmp/rrdcached.sock
+ compile livestatus module       yes
+ Nagios / Icinga version         4.0.8
+ check_mk's binary modules       /opt/check_mk/lib
+ Unix socket for Livestatus      /opt/nagios/var/rw/live
+ Backends for other systems      /opt/check_mk/share/livestatus
+ Install Event Console           yes
+ working directory of mkeventd   /opt/mkeventd/lib
+  Proceed with installation (y/n)? y
+(Compiling MK Livestatus....................................................)
+Installation completed successfully.
+Please restart Nagios and Apache in order to update/active check_mk's web pages.
+You can access the new Multisite GUI at http://localhost/check_mk/
+</code>
+====mod_python====
+The current version (1.2.6x) of Check_MK still needs the old mod_python.
+  * Install development tools:<code>yum install python-devel httpd-devel</code>
+  * Download latest modpython source code.
+  * Extract:<code>tar zxvf mod_python-3.5.0.tgz</code>
+  * Install:<code>cd mod_python-3.5.0
+./configure
+make
+make install
+# Edit /usr/lib64/python2.7/site-packages/mod_python/version.py
+# Change version line to: version = "3.5.0"
+vi /usr/lib64/python2.7/site-packages/mod_python/version.py</code>
+  * Configure and Apache:<code># in /etc/httpd/conf.modules.d, create 00-python.conf with the following LoadModule line inside it
+LoadModule python_module modules/mod_python.so
+systemctl restart httpd</code>
+====Check_MK Config====
+  * Enable and Start mkeventd:<code>chkconfig --add mkeventd
+chkconfig --level 35 mkeventd on
+service mkeventd start</code>
+  * Install Check_MK client on host. <code>yum install xinetd
+cd check_mk-1.2.6p1
+mkdir agents
+cd agents
+tar zxvf ../agents.tar.gz
+mkdir /opt/check_mk_agent
+cp check_mk_agent.linux /opt/check_mk_agent/bin/check_mk_agent
+cp xinetd.conf /etc/xinetd.d/check_mk_agent
+# Edit path and allowed hosts
+#        server         = /opt/check_mk_agent/bin/check_mk_agent
+#        only_from      = 127.0.0.1
+vi /etc/xinetd.d/check_mk_agent
+systemctl enable xinetd
+systemctl start xinetd
+# Test agent
+nc 127.0.0.1 6556
+</code>
+  * Configure monitoring host in Check_MK itself, add host, IP-address 127.0.0.1.
+  * Remove localhost from **/opt/nagios/etc/nagios.cfg**, then restart all of Check_MK:<code>/opt/check_mk/bin/cmk -R.</code>
+====Set rights to enable config 'discard changes'====
+  * Modify rights:<code>chown -R apache.nagcmd /opt/check_mk/etc
+chown -R nagios.nagcmd /opt/check_mk/var/lib/
+chown -R apache.nagcmd /opt/check_mk/var/lib/wato
+chgrp -R nagcmd /opt/nagios/etc/
+chown -R apache.nagcmd /opt/check_mk/var/lib/wato
+chmod g+w /opt/check_mk/etc
+chmod g+w /opt/check_mk/var/lib/
+chmod g+w /opt/nagios/etc/</code>
+====Modify template====
+  * Nagios warns about obsoleted feature, remove **failure_prediction_enabled** from template file **/opt/nagios/etc/check_mk.d/check_mk_templates.cfg**
+====Disable Nagios logging to syslog====
+  * Edit **/opt/nagios/etc/nagios.cfg** <code>use_syslog=0</code>
+  * Restart nagios. <code>service nagios restart</code>
+====Quick start agent setup====
+**Note: the EPEL version is older and might have some incompatibilities, you can also install the RPM provided with the Check_MK tar.gz**
+  * Install check_mk agent via EPEL:<code>yum -y install check-mk-agent
+vi /etc/xinetd.d/check-mk-agent # change only_from
+firewall-cmd --permanent --zone trusted --add-service=checkmkagent
+firewall-cmd --reload
+systemctl enable xinetd
+systemctl restart xinetd</code>
+====Upgrade Check_MK====
+  * Download latest tar.gz
+  * Extract
+  * Run ./setup.sh
+  * Restart nagios and apache
+  * Fix notifications (see above), after run cmk -O (captital o)
+{{tag>[linux monitoring check_mk centos7]}}