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tutorial:adm:server_monitoring [2019/03/25 10:24]
fiserp [Monitored parameters] 		tutorial:adm:server_monitoring [2019/03/25 10:27]
fiserp [Implementation]
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 Automatic monitoring of production system is crucial for bussiness continuity. Monitoring is recommended also for the testing environment, but it is not mandatory. Automatic monitoring of production system is crucial for bussiness continuity. Monitoring is recommended also for the testing environment, but it is not mandatory.
 This page will show you how to set up basic monitoring of server with CzechIdM using Nagios NRPE. It is very useful to store monitored values for trend overview (e.g. with Munin). Some monitoring systems (like Zabbix) can store trends and monitor services at once. It is also practical to install ''iostat'', ''vmstat'' and ''sar'' utilities on the server. This page will show you how to set up basic monitoring of server with CzechIdM using Nagios NRPE. It is very useful to store monitored values for trend overview (e.g. with Munin). Some monitoring systems (like Zabbix) can store trends and monitor services at once. It is also practical to install ''iostat'', ''vmstat'' and ''sar'' utilities on the server.
 +
 +<note>This article is about real-time monitoring of the server and its services. It does not deal with monitoring of the "insides" of CzechIdM.</note>
  
 **Typical CzechIdM server** **Typical CzechIdM server**
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 ===== Implementation ===== ===== Implementation =====
 We will use nrpe and probes from the standard system packages. We have epel repository enabled. We will use nrpe and probes from the standard system packages. We have epel repository enabled.
-  * NRPE daemon will listen on 5666\tcp (its default port). Open the port in your iptables by adding the rule: //-A INPUT -m state --state ESTABLISHED,RELATED -p tcp --dport 5666 -j ACCEPT//. +  * NRPE daemon will listen on 5666\tcp (its default port). Open the port in your iptables by adding the rule: ''-A INPUT -m state --state ESTABLISHED,RELATED -p tcp --dport 5666 -j ACCEPT''. 
-  * All probes are located in their default installation location ///usr/lib64/nagios/plugins///. +  * All probes are located in their default installation location ''/usr/lib64/nagios/plugins/''. 
-  * We use one external probe check_mem which can be downloaded here: [[https://exchange.nagios.org/directory/Plugins/System-Metrics/Memory/check_mem-2Esh/details]]. This probe, however, returns bad results on RHEL7 because of the different meaning of the //free// command output. The fixed version is:+  * We use one external probe check\_mem which can be downloaded here: [[https://exchange.nagios.org/directory/Plugins/System-Metrics/Memory/check_mem-2Esh/details]]. This probe, however, returns bad results on RHEL7 because of the different meaning of the ''free'' command output. The fixed version is:
 <code bash> <code bash>
 #!/bin/bash #!/bin/bash
  • by urbanl