Nagios Monitoring Installation

One, what is Nagios

1.nagios Introduction

Nagios is a monitoring system that monitors the system's operational status and network information. Nagios can monitor the specified local or remote host and service, as well as provide exception notification functionality. Nagios runs on the Linux/unix platform, while providing an optional browser-based web interface to allow system administrators to view network status, system issues, logs, and more.

Nagios is a very popular, open source and free computer and network system monitoring software. Nagios is the abbreviation for "Nagios Ain ' t gonna insist on sainthood". It was first released in 1999 with "Netsaint". Nagios is primarily used for monitoring in Linux and UNIX platform environments, but the host of MS Windows systems can also be monitored through plugins. Nagios is poll and selected as the most popular it ops tool in LinuxCon. It was named best open source software by InfoWorld in 2009 and is the best choice for systems management tools for the SourceForge community of the year. Nagios is also used by many well-known companies, including Aol,dhl,at&t, L ' oreal, Texas Instruments, Siemens COM CZ, Time Warner Cable, Yahoo, etc.

The main features of the 2.Nagios are:

-Monitor network services (SMTP, POP3, HTTP, NNTP, ping, etc.)

-Monitor host resources (processes, disks, etc.)

-Simple plug-in design to easily expand Nagios's monitoring capabilities

-concurrent processing of monitors such as services

-Error notification function (via email, pager, or other user-defined method)

-can specify a custom event handling controller

-Optional browser-based web interface to allow system administrators to view network status, system issues, logs, etc.

-System monitoring information can be viewed from the phone

Service side (222.105.134.103)

RPM installation Nagios first needs to install the extended Yum source

Rpm-y Install Epel-release

RPM Installation Nagios

Yum install-y httpd nagios nagios-pluginx nagios-plugins-all Nrpe Nagios-plugins-nrpe

Configure the Nagios login password after installation

[Email protected]]# htpasswd-c/etc/nagios/passwd nagiosadmin
New Password:
Re-type New Password:
Adding Password for user nagiosadmin

Modifying the Nagios configuration file

Vim/etc/nagios/nagios.cfg

Detect the configuration file is correct

Nagios-v/etc/nagios/nagios.cfg

Start HTTP and Nagios

Service httpd start;service Nagios start

Clear firewall configuration: iptables-f

Browser Access Http://ip/nagios

Client configuration (222.105.134.102)

Build Configuration Nagios

Configuring the extension source Rpm-y install Epel-release

RPM Installation Nagios

Yum install-y httpd nagios nagios-pluginx nagios-plugins-all Nrpe Nagios-plugins-nrpe

Vim/etc/nagios/nrpe.cfg find "allowed_hosts=127.0.0.1" added as "allowed_hosts=127.0.0.1,222.105.134.103" #加入服务机的ip

Find "dont_blame_nrpe=0" and Change to "dont_blame_nrpe=1"

Start client: Service Nagios start

When a service is locally monitored on the client side of the server , configure the server-side Nagios configuration file to add the following:

[Email protected]]# vi/etc/nagios/objects/commands.cfg

Define Command{

Command_name Check_nrpe

Command_line $USER 1$/check_nrpe-h $HOSTADDRESS $-C $ARG 1$

}

Server Add project monitored by monitored host (222.105.134.102)

cd/etc/nagios/conf.d/

Vim 222.105.134.102.cfg

define host {             use             linux-server                           ; Define monitoring host              host_name     222.105.134.102              alias        134.102              address      222.105.134.102              }   define service  {           use                     generic-service            host_name               222.105.134.102           service_ description    check_ping            check_command          check_ping!10.020%!200.0,50%            max_check_attempts 5            normal_check_interval 1            }      define service {          use                 &Nbsp;     generic-service         host_ name                 222.105.134.102         service_description       check_ssh         check_command             check_ssh          max_check_attempts       5   # When Nagios detects a problem, a total of 5 attempts to detect a problem before the alarm, if the value is 1, then detected a problem immediately alarm         normal_check _interval 1    #重新检测的时间间隔, Unit is minutes, default is 3 minutes          notification_interval 60   #在服务出现异常后, the failure has not been resolved and Nagios again notifies the user of the time. Units are minutes. If you think that all events require only one notification, you can set the option here to 0.  }define service{         use                      generic-service          host_name                222.105.134.102         service_description      check_http         check_command            check_http          max_check_attempts 5         normal_ check_interval 1 }    define service {         use                       generic-service        host_name                 222.105.134.102         service_description      check_load         check_command             check_nrpe!check_load        max_check_attempts 5         normal_check_interval 1}  define service  {        use                       generic-service         host_name                 222.105.134.102        service_description       check_disk_hda1        check_command             check_nrpe!check_hda1         max_check_attempts 5        normal_check_interval  1} define service {        use                        generic-service        host_name                 222.105.134.102         service_description      check_disk_hda2         cHeck_command            check_nrpe!check_hda2         max_check_attempts 5         NORMAL_CHECK_INTERVAL 1}

The monitoring disk is the/ETC/NAGIOS/NRPE.CFG configuration file that modifies the service side , as shown in the following changes

Command[check_hda1]=/usr/lib64/nagios/plugins/check_disk-w 20%-C 10%-p/dev/hda1command[check_hda2]=/usr/lib64/ Nagios/plugins/check_disk-w 20%-C 10%-p/dev/hda2 modified to: Command[check_hda1]=/usr/lib64/nagios/plugins/check_disk-w 20 %-C 10%-p/dev/sda1command[check_hda2]=/usr/lib64/nagios/plugins/check_disk-w 20%-C 10%-p/dev/sda2

That is, the system area code must be the same as the partition number in the configuration file

Post-write service end multiplicity start Nagios service:/etc/init.d/nagios restart

Client Restart Nrep service:/etc/init.d/nrep restart

This article is from the "Linux Nest" blog, please be sure to keep this source http://xiangcc.blog.51cto.com/10201823/1700675

Nagios Monitoring Installation