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--- server_monitoring [2010/06/16 09:33]
172.26.0.166
+++ server_monitoring [2010/10/19 17:18] (current)
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 ===== Server Monitoring =====
-  * [[#ganglia|Ganglia]] - Monitors cluster CPU, disk, network usage
+  * [[server_monitoring:ganglia|Ganglia]] -- Monitors cluster CPU, disk, network usage
-  * [[#monit|Monit]] - Monitors specific services
+  * [[server_monitoring:monit|Monit]] -- Monitors specific services
-  * [[#nagios|Nagios]] - Monitors servers,hosts and services
+  * [[server_monitoring:nagios|Nagios]] -- Monitors servers, hosts and services
-  * [[#Zabbix|Zabbix]] -Monitor servers,host and services
+  * [[server_monitoring:zabbix|Zabbix]] -- Monitors servers, host and services
-===== Ganglia =====
-[[http://ganglia.info/|Ganglia]] is a system for measuring, recording, and graphing certain metrics about hosts in a cluster.  Metrics include things like CPU load, network traffic, disk space, RAM utilization, etc.  These metrics are saved and graphed periodically by [[http://oss.oetiker.ch/rrdtool|RRDtool]]. Rocks automatically configures the head node to query the compute nodes and has a web-based interface where you can monitor the health of the cluster.
-You can see the ganglia installation here:  http://hpc.ilri.cgiar.org/ganglia
-{{:ganglia_diagram_smaller.gif|}}
-Interesting documentation: http://www.ibm.com/developerworks/wikis/display/WikiPtype/ganglia
-==== Troubleshooting ====
-From time to time there are problems with Ganglia's web interface.  You can restart the needed services following this basic procedure:
-  - Stop data collection daemon on HPC: ''service gmetad stop''
-  - Stop monitoring daemon on compute nodes: ''rocks run host compute %%'%%service gmond stop%%'%%''
-  - Start data collection daemon on HPC: ''service gmetad start''
-  - Wait a minute or two
-  - Start monitoring daemon on compute nodes: ''rocks run host compute %%'%%service gmond start%%'%%''
-Now go check the Ganglia web interface and see if the nodes have returned.
-===== Monit =====
-Monit is a free open source utility for managing and monitoring, processes, files, directories and filesystems on a UNIX system. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations.
-Monit can start a process if it does not run, restart a process if it does not respond and stop a process if it uses too much resources. it logs to syslog or to its own log file and notifies you about error conditions and recovery status via customizable alert.
-Monit provides a built-in HTTP(S) interface and you can use a browser to access the Monit server.
-M/Monit expand upon Monit's capabilities to provide monitoring and management of all Monit enabled hosts from one easy to use web-interface. Status and events from each monitored system is updated in real-time and displayed in charts, graphs and tables.
-Get the latest version at: http://mmonit.com/monit/download
-<code>$ wget http://mmonit.com/monit/dist/monit-5.0.3.tar.gz
-$ tar xfz monit-5.0.3.tar.gz
-$ cd monit-5.0.3
-$ ./configure && make && make install</code>
-Accessing monit:
-http://hpc.ilri.cgiar.org:2812
-===== Nagios =====
-Nagios is a powerful monitoring system that enables organizations to identify and resolve IT infrastructure problems before they affect critical business processes. http://www.nagios.org/about
-=== Installation ===
-----
-Download the latest version of nagios while hot, from http://www.nagios.org/download
-<file>$ wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-3.2.0.tar.gz
-$ cd nagios-3.2.0
-$ ./configure
-$ make all
-$ useradd nagios
-$ make install
-$ make install-init
-$ make install-commandmode
-$ make install-config
-$ make install-webconf
-</file>
-=== Configuration ===
-----
-Running the following command will create a new file called htpasswd.users in the /usr/local/nagios/etc directory. It will also create an username/password entry for nagiosadmin. You will be asked to provide a password that will be used when nagiosadmin authenticates to the web server.
-<code>htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin </code>
-Download and install plugins
-<file>
-$ wget http://prdownloads.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.14.tar.gz
-$ tar xfz nagios-plugins-1.4.14.tar.gz
-$ cd nagios-plugins-1.4.14
-$ ./configure && make && make install
-</file>
-Edit the configuration files to add host and services to be monitored:
-<code>vim /usr/local/nagios/etc/objects/localhost.cfg </code>
-Check remote services http://wiki.nagios.org/index.php/Howtos:checkbyssh_RedHat
-=== Accessing Nagios ===
-----
-http://172.26.0.205:4020/nagios/
-with  username = "nagiosadmin" and password = "nagios"
-==== Zabbix ====
-----

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