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Nagios (view source)

Revision as of 08:51, 11 July 2022

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{{Languages}}
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{{Needs review}}
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{{Note box|msg=Suggest looking at [[Zabbix]] which works for SME9.*}}
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{{Note box|msg=This contrib was only applied and used on fresh SME (server only mode) install. Conflicts with other installed packages were not examined. The author strongly recommend to install this monitoring system on a dedicated server. It is entirely possible to run it on a virtualized system, which monitors the host itself. In this case you should set up a second Nagios server (acting as a watchdog) on an independent hardware (physically or virtualized) to monitor the main Nagios system}}
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{{Note box|msg=This contrib does not work on SME8b6 as documented here, there are a few changes needed to the repository info and also the yum commands, also a change needs to be made to the location of the nagios.pid file in order for it run successfully after installation. There is an outstanding bug [[bugzilla:5539]] which contains the necessary information.}}
 
=== Maintainer ===
 
=== Maintainer ===
 
Michael Weinberger
 
Michael Weinberger
 +
    
=== Introduction ===
 
=== Introduction ===
−
Nagios is a host and service monitor designed to inform you of network problems before your clients, end-users or managers do.   [http://www.nagios.org/about/ Read more...]
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Nagios is a host and service monitor designed to inform you of network problems before your clients, end-users or managers do. [http://www.nagios.org/about/ Read more...]
 +
 
 +
 
 +
This [[Nagios]] contrib installs Nagios Version 3 and was tested on fresh installed SME Server 7.3
 +
It provides all packages needed to setup a SME Server as a central Nagios monitoring server including the graphical performance data analyser [http://www.pnp4nagios.org/start PNP4Nagios].
 +
(Applied this how-to on a fresh SME Server 7.4, works)
 +
 
 +
{| cellpadding=10
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| [[Image:Nagios-screenshot-8.png]] || [[Image:Nagios-PNP-Screenshot.gif]] 
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|-
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| Statusmap screenshot of a sample Nagios configuration || PNP Screenshot ''(Source: www.pnp4nagios.org)''
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|}
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 +
 
 +
These packages are provided by the contrib. All other dependend packages will be installed via yum from the Centos and DAG repostitories.
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{| style='white-space:nowrap' border="1" cellpadding="3" cellspacing=0
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! Package !! Version !! Build date !! Purpose
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|-
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| smeserver-nagios || 2.0.0-1 || 17 Nov 2008 || Integrates Nagios service into the SME Server
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|-
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| smeserver-nagios-nrpe || 2.0.0-1 || 17 Nov 2008 || Integrates NRPE service into the SME Server
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|-
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| smeserver-nagios-nsca || 2.0.0-1 || 17 Nov 2008 || Integrates NSCA service into the SME Server (needed in a Distributed Installation)
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|-
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| smeserver-nagios-plugins-mysql || 2.0.0-1 || 18 Nov 2008 || Plugin that checks the mysqld service on a SME Server
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|-
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| smeserver-nagios-backup || 2.0.0-1 || 17 Nov 2008 || Nagios backup integration. Includes Nagios configuration and status data into the SME standard backup
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|-
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| nagios-plugins-temptrax || 2.0.1-1 || 18 Nov 2008 || Plugins for the Sensatronics Ethernet Temperature Devices E4/E16/F
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|-
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| nagios-plugins-esx3i || 1.0.3-0 || 16 Nov 2008 || Plugins to monitor ESXi servers that support the "Common Information Model (CIM)" protocol like Dell PowerEdge 29xx. [http://cars.lostroncos.org/2008/03/07/updated-esx-3i-scripts-for-nagios/ Read more...]
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|-
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| perl-Nagios-Plugin || 0.17-1 || 19 Oct 2007 || A family of perl modules to streamline writing Nagios plugins
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|-
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| nagios-of-plugins || 0.9.4-1 || 08 Jul 2007 || Additional plugins written by [http://www.openfusion.com.au/labs/nagios/ Gavin Carr of Open Fusion]
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|-
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| nagios-plugins-generic || 1.0.0 || 01 Nov 2007 || A generic plugin. [http://www.my-plugin.de/wiki/doku.php/projects:check_generic:start Read more...]
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|-
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| nagios-nuvola-1.0.3.tar.gz  || 1.0.3 || 28 Oct 2007 || Nuvola GUI theme
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|-
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| nagios-icons-nx-1.0.0.tar.gz  || 1.0.0 || 04 Nov 2007 || Additional useful icons, including the SME logo
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 +
|}
    
=== Download ===
 
=== Download ===
−
[http://mirror.contribs.org/smeserver/contribs/michaelw/sme7/nagios smeserver-nagios-complete-1.0.0.tgz]
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Download the packages and files from http://mirror.contribs.org/smeserver/contribs/michaelw/sme7/Nagios3/packages/ manually or run the the script [http://mirror.contribs.org/smeserver/contribs/michaelw/sme7/Nagios3/packages/wgetall wgetall] to download all in one go.
 +
bash < wgetall
    
=== Installation ===
 
=== Installation ===
−
Unpack the tarball:<br>
  −
<code>tar xzf smeserver-nagios-complete-1.0.0.tgz<br>
  −
cd smeserver-nagios-complete-1.0.0</code>
     −
=== Usage ===
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{{Note box|If you have the Nagios 2 contrib installed, follow the update instructions below}}
−
Point your browser to https://nagios_server_ip/nagios/
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 +
==== Configure the dag repositoy ====
 +
You need to activate the [[Dag]] reposity before installing this contrib.<br />
 +
 
 +
see [[dag|dag repository]] <br />
 +
 
 +
==== Installation of a central Nagios server ====
 +
Intstalling the packages
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/usr/bin/yum --enablerepo=dag install \
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  nagios-plugins-setuid \
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  perl-Config-Tiny
 +
 
 +
/usr/bin/yum --enablerepo=dag localinstall \
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  smeserver-nagios-*.noarch.rpm \
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  pnp-*.i386.rpm \
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  smeserver-nagios-backup-*.noarch.rpm \
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  perl-Nagios-Plugin-*.noarch.rpm \
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  smeserver-nagios-plugins-mysql-*.noarch.rpm \
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  nagios-plugins-generic-*.noarch.rpm \
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  nagios-of-plugins-*.noarch.rpm \
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  nagios-plugins-temptrax-*.el4.rf.i386.rpm \
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  nagios-plugins-esx3i-*.el4.noarch.rpm
 +
Use the configuration files from the smeserver-nagios package as a starting point. This provides a working configuration.
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/bin/cp -ba /etc/nagios/nagios.cfg-smeserver /etc/nagios/nagios.cfg
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/bin/cp -ba /etc/nagios/cgi.cfg-smeserver /etc/nagios/cgi.cfg
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Configuring global access with password required
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config set nagios service Name Nagios PublicAccess global-pw
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expand-template /etc/httpd/conf/httpd.conf
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service httpd-e-smith restart
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service nagios restart
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Test the installation by pointing your browser to ''<nowiki>https://IPADDRESS/nagios/</nowiki>''
 +
 
 +
Browser login in as admin.
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After 10 minutes the performance data graphes are available. Click on on the 'star' icon next to the service name to view the graphes on a new page.
 +
 
 +
===== Install the VMware ESXi Server CIM Hardware Monitoring (optional) =====
 +
If you plan to monitor an ESx3i server with CIM compliant hardware, you can configure the ESXi plugin
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  /usr/bin/yum --enable=dag install openssl-devel perl-XML-SAX
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Download and install the [http://www.vmware.com/support/developer/viperltoolkit/ VMware Infrastructure (VI) Perl Toolkit]
 +
 
 +
Ignore this warning:
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''The following Perl modules were found on the system but may be too old to work
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with VIPerl:
 +
URI
 +
XML::NamespaceSupport''
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 +
It does not affect the proper function of the nagios plugins.
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 +
To get some configuration hints run
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rpm -qi nagios-plugins-esx3i
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 +
===== Install the Nuvola theme (optional) =====
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The Nuvola theme provides a nice and modern GUI. The screenshot above was made with the Nuvola theme installed.
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cd /usr/share/nagios
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rm -rf config.js images index.html main.html side side.html stylesheets
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cd -
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tar --strip-path=1 -C /usr/share/nagios -xzf nagios-nuvola-*.tar.gz
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chmod a+r -R /usr/share/nagios
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Empty your browser cache and reload the Nagios page.
 +
 
 +
===== Integrate Ajaxterm in the Nuvola theme Home menu (optional) =====
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Install the [[Ajaxterm]] contrib and run
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patch -p0 /usr/share/nagios/side/dtree_data.js < dtree_data.js.patch
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Empty your browser cache and reload the Nagios page.
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 +
===== Install additional logo icons (optional) =====
 +
This installs a set of icons, including the SME server logo. The logos can be used in the ''hostextinfo{}'' sections. A preview of the logos can be found [http://wiki.contribs.org/images/d/d0/Nagios-logos.jpg here].
 +
 
 +
tar --strip-path 1 -C /usr/share/nagios/images/logos -xzf nagios-icons-nx-*.tar.gz
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chown nagios.root  /usr/share/nagios/images/logos/*
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chmod 644  /usr/share/nagios/images/logos/*
 +
 
 +
==== Hints ====
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* Place all your configuration files in /etc/nagios/ in the sub-directories templates, host, services, etc.
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 +
* Do not change the default pathes of log files, rrd files, etc.. The ''smeserver-nagios-backup'' RPM requires these settings to work properly.
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* Nagios 3 runs host checks that provides performance data. Add this action_url option to each host definiton:
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action_url /nagios/pnp/index.php?host=$HOSTNAME$
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* Add this action_url option to service checks with performance data output
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action_url /nagios/pnp/index.php?host=$HOSTNAME$&srv=$SERVICEDESC$
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* You can permit other users to access Nagios. Add them separated by a comma to the lines
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authorized_for_system_information=admin
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authorized_for_system_commands=admin
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authorized_for_configuration_information=admin
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authorized_for_all_hosts=admin
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authorized_for_all_host_commands=admin
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authorized_for_all_services=admin
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authorized_for_all_service_commands=admin
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* It is a good idea to make your Nagios server as independent as possible from the infrastructure it monitors, i.e., use a dedicated hardware, network, mail- and pager system, firewall and internet connection if possible.
 +
* Consider to setup a second Nagios somewhere on your network, which monitors your central Nagios server. Then you need to install the NRPE also on the central server.
 +
 
 +
==== Update from Nagios 2 to Nagios 3 ====
 +
Before installing this contrib based on Nagios 3, remove all packages of the previous Nagios 2 installation
 +
service nagios stop
 +
service nagiosgrapher stop
 +
 
 +
/usr/bin/yum erase \
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nagios-plugins-esx3i \
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nagios-nrpe \
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nagios-plugins-temptrax \
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nagios-plugins \
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nagios-of-plugins \
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nagios-plugins-generic \
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nagios  smeserver-nagios-nrpe \
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smeserver-nagios \
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smeserver-nagios-plugins-mysql \
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nagios-plugins-nrpe  \
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nagios-plugins-setuid \
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smeserver-nagiosgrapher \
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smeserver-nagios-backup
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Remove all NagiosGrapher rrd data. It is not possible to tranfer the existing NagiosGrapher data to PNP.
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rm -rf /var/lib/nagios/*
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Backup your Nagios configuration data
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cp -a /etc/nagios /etc/nagios.v2
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Delete Nagios configuration data
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rm -rf /etc/nagios
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Move the retention data to the new Nagios 3 loaction
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mkdir -p /var/nagios/
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mv /var/log/nagios/retention.dat /var/nagios/
 +
 
 +
'''Now install this contrib following the instructions in chapter 'Installation'
 +
'''
 +
service nagios stop
 +
Delete the default configuration files
 +
cd /etc/nagios
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rm -rf commands/default.cfg \
 +
  objects \
 +
  contacts/contacts.cfg \
 +
  hostgroups/default.cfg \
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  hosts/localhost.cfg \
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  servicegroups/default.cfg \
 +
  services/localhost.cfg \
 +
  templates/default.cfg \
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  timeperiods/default.cfg
 +
 +
Copy your saved configuration files to /etc/nagios. When you place them into the pre-defined directories contacts, services, hostgroups, templates, commands, hosts, servicegroups, and timeperiods you don't need to adjust nagios.cfg.
 +
 
 +
Review your config files and do the following
 +
* add <tt>'''use host-pnp'''</tt> to your generic host definition to add an action url for PNP  to all hosts.
 +
* for all services that output performance data add <tt>'''action_url /nagios/pnp/index.php?host=$HOSTNAME$&srv=$SERVICEDESC$'''</tt> to your service template definitions
 +
* move all options from <tt>'''hostextinfo'''</tt>  definition (except <tt>'''host_name'''</tt> and <tt>'''action_url'''</tt>) to <tt>'''host'''</tt> definition. Delete the <tt>'''hostextinfo'''</tt>  definition.
 +
* do the same for <tt>'''serviceextinfo'''</tt> definitons
 +
 
 +
When done check your config
 +
nagios -v /etc/nagios/nagios.cfg
 +
and finally start the service
 +
service nagios start
 +
 
 +
==== Backup and Restore ====
 +
With the smeserver-nagios-backup RPM installed all Nagios and PNP configuration data, status data and archives are included in the SME Server standard backup. In the pre-backup event those data are copied to the <tt>/home/e-smith/db/nagios/</tt> directory. As the nagios service is stopped during copying it is recommended to configure Nagios to save its scheduling info (next check time) for hosts and services in a file and use this at startup. Otherwise Nagios would re-schedule all checks spreaded over the timeframe defined by <tt>max_service_check_spread</tt> and <tt>max_host_check_spread</tt> (default 30 min). As a result you would have gaps  in checking and visible gaps in the PNP graphes.
   −
Basic login in as admin.
+
in <tt>/etc/nagios/nagios.cfg</tt> set:
 +
retain_state_information=1
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state_retention_file=/var/nagios/retention.dat
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use_retained_program_state=1
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use_retained_scheduling_info=1
 +
 +
When doing a restore, the data from <tt>/home/e-smith/db/nagios/</tt> are copied back to their original locations in the bootstrap-console-save event.
   −
[[Image:Ajaxterm-screenshot.gif]]
+
=== Uninstall ===
 +
This removes the installed Nagios packages.
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service nagios stop
   −
=== Additional information ===
+
rpm -e \
 +
nagios-of-plugins \
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nagios-plugins-esx3i \
 +
nagios-plugins-generic \
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nagios-plugins-temptrax \
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perl-Nagios-Plugin \
 +
pnp \
 +
smeserver-nagios \
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smeserver-nagios-backup \
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smeserver-nagios-nrpe \
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smeserver-nagios-nsca \
 +
smeserver-nagios-plugins-mysql \
 +
nagios-plugins-setuid \
 +
perl-Config-Tiny
    +
Remvove the dependencies if not needed by other contribs
 +
rpm -e \
 +
fping \
 +
gd \
 +
libart_lgpl \
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libmcrypt \
 +
nagios \
 +
nagios-nrpe \
 +
nagios-nsca \
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nagios-nsca-client \
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nagios-plugins \
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nagios-plugins-nrpe \
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perl-Class-Accessor \
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perl-Crypt-DES \
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perl-Math-Calc-Units \
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perl-Net-SNMP \
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perl-Params-Validate \
 +
perl-rrdtool \
 +
rrdtool \
 +
xinetd
 +
Ignore the warnings about non-existing user nagios and group nagios.
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expand-template /etc/httpd/conf/httpd.conf
 +
service httpd-e-smith restart
   −
[x[Category: Webapps]]
+
=== References ===
−
[x[Category: Contrib]]
+
* Nagios NRPE Contrib: [[Nagios NRPE]]
−
[x[Category: Administration]]
+
* Nagios NSCA Contrib: [[Nagios NSCA]]
 +
* Nagios: http://www.nagios.org/
 +
* perl-Nagios-Plugin: http://members.financial.com/~cmr/rpmforge/perl-Nagios-Plugin/
 +
* nagios-of-plugins: http://www.nagiosexchange.org/Plugin_Packages.52.0.html?&tx_netnagext_pi1%5Bp_view%5D=323
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* Nuvola theme: http://www.nagiosexchange.org/Image_Packs.75.0.html?&tx_netnagext_pi1%5Bp_view%5D=252&tx_netnagext_pi1%5Bpage%5D=10%3A10
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* Temptrax Plugin: http://www.nagiosexchange.org/cgi-bin/page.cgi?g=1716.html
 +
* Nagios books: ''"Nagios : system and network monitoring / Wolfgang Barth / ISBN 1-59327-070-4"'', ''"Building a Monitoring Infrastructure with Nagios / David Josephsen / ISBN 0-13-223693-1"''
 +
* Nagios in a German Computer Magazine: http://www.heise.de/netze/artikel/81238
 +
* PNP4Nagios: http://www.pnp4nagios.org/pnp/start
 
----
 
----
 +
[[Category: Deprecated_Contrib]]
 +
[[Category: Nagios]]
 +
[[Category: Webapps]]
 +
[[Category: Administration:Monitoring]]
Unnilennium
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