Redhat配置nagios-配置linux被監(jiān)控機
配置被監(jiān)控機
本文講述的是：Redhat配置nagios。返回大綱。
配置linux被監(jiān)控機(客戶端)
需要先安裝gcc、openssl、openssl-devel。
先添加一個用戶
- [root@localhost ~]# useradd nagios
- [root@localhost ~]# passwd nagios //123456
Changing password for user nagios.
New UNIX password:
BAD PASSWORD: it is too simplistic/systematic
Retype new UNIX password:
passwd: all authentication tokens updated successfully.
#p#
安裝nagios-plugins-1.4.15.tar.gz
- [root@localhost ~]# tar -zxvf nagios-plugins-1.4.15.tar.gz
- [root@localhost ~]# cd nagios-plugins-1.4.15
- [root@localhost nagios-plugins-1.4.15]# ./configure --prefix=/usr/local/nagios
- [root@localhost nagios-plugins-1.4.15]# make
- [root@localhost nagios-plugins-1.4.15]# make install
- [root@localhost nagios-plugins-1.4.15]# chown nagios.nagios /usr/local/nagios
- [root@localhost nagios-plugins-1.4.15]# chown -R nagios.nagios /usr/local/nagios/libexec
安裝nrpe
- [root@localhost ~]# tar -zxvf nrpe-2.8b1
- [root@localhost ~]# cd nrpe-2.8b1
- [root@localhost nrpe-2.8b1]# ./configure
- [root@localhost nrpe-2.8b1]# make all
- [root@localhost nrpe-2.8b1]# make install-plugin
- [root@localhost nrpe-2.8b1]# make install-daemon
- [root@localhost nrpe-2.8b1]# make install-daemon-config
編輯nrpe.cfg
- [root@localhost ~]# vi /usr/local/nagios/etc/nrpe.cfg
查找如下加上nagios服務(wù)器ip地址
allowed_hosts=127.0.0.1,10.155.2.65
保存后，用如下命令啟動nrpe和添加到開機啟動中
- /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg –d
- echo '/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d &> /dev/null' >> /etc/rc.local
驗證
- [root@localhost etc]# /usr/local/nagios/libexec/check_nrpe -H localhost
NRPE v2.8b1
- [root@localhost etc]# netstat -atulnp | grep 'nrpe'
tcp 0 0 0.0.0.0:5666 0.0.0.0:* LISTEN 24823/nrpe
如果不正常見文章***的問題和解決(1)
這里客戶端的配置已經(jīng)完成，已經(jīng)可以到nagios服務(wù)器配置command.cfg監(jiān)控，但是這里介紹另一種方法在編輯nrpe.cfg配置命令，nagios服務(wù)器會調(diào)用客戶端的nrpe命令
- vi /usr/local/nagios/etc/nrpe.cfg
- command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10
- command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20
- command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z
- command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200
- command[check_swap]=/usr/local/nagios/libexec/check_swap -w 20% -c 10%
下面這條是自己添加
- command[check_ping81]=/usr/local/nagios/libexec/check_ping -H 10.155.0.1 -w 100.0,20% -c 500.0,60%#
- command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20 -c 10 -p /dev/hda1
- #command[命令名稱]=命令定義
具體使用見幫助
- [root@localhost nagios]# ls
- bin etc include libexec share
- [root@localhost nagios]# pwd
- /usr/local/nagios
- [root@localhost nagios]# libexec/check_ping -h
- check_ping v1.4.15 (nagios-plugins 1.4.15)
- Copyright (c) 1999 Ethan Galstad
- Copyright (c) 2000-2007 Nagios Plugin Development Team
- Use ping to check connection statistics for a remote host.
- Usage:
- check_ping -H -w ,% -c ,%
- [-p packets] [-t timeout] [-4|-6]
- Options:
- -h, --help
- Print detailed help screen
- -V, --version
- Print version information
- -4, --use-ipv4
- Use IPv4 connection
- -6, --use-ipv6
- Use IPv6 connection
- -H, --hostname=HOST
- host to ping
- -w, --warning=THRESHOLD
- warning threshold pair
- -c, --critical=THRESHOLD
- critical threshold pair
- -p, --packets=INTEGER
- number of ICMP ECHO packets to send (Default: 5)
- -L, --link
- show HTML in the plugin output (obsoleted by urlize)
- -t, --timeout=INTEGER
- Seconds before connection times out (default: 10)
配置nrpe.cfg后，必須重啟nrpe。重啟方法(殺死進程，在重啟)，否則更改不會生效
- [root@localhost ~]# ps aux|grep nrpe
- nagios 3327 0.0 0.0 4880 924 ? Ss Sep02 0:03 /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
- root 22293 0.0 0.0 3908 648 pts/0 R+ 11:07 0:00 grep nrpe
- [root@localhost ~]# /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
服務(wù)器端
測試與客戶端連接，如下表示正常
- [root@localhost nrpe-2.8b1]# /usr/local/nagios/libexec/check_nrpe -H 10.155.2.81
- NRPE v2.8b1
下面表示不正常，見問題與解決(2)
- [root@localhost nrpe-2.8b1]# /usr/local/nagios/libexec/check_nrpe -H 10.155.2.81
- Connection refused by host
配置nagios.cfg，增加一條記錄
- [root@localhost ~]# vi /usr/local/nagios/etc/nagios.cfg
- cfg_file=/usr/local/nagios/etc/objects/mylinux.cfg
- cfg_file=/usr/local/nagios/etc/objects/commands.cfg ;此前面已經(jīng)設(shè)置過
配置nagios.cfg，增加一條記錄
- vi /usr/local/nagios/etc/objects/commands.cfg
#在后面增加追加如下內(nèi)容
#check nrpe
define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
mylinux
.cfg在目錄中沒有，需要自己添加
- [root@localhost ~]# touch /usr/local/nagios/etc/objects/mylinux.cfg
#p#
#---------------------------------------------此段定義主機--------------------------------------------------------
- define host{
- use linux-server
- host_name 10.155.2.81-cacti
- alias mylinux
- address 10.155.2.81
- }
#--------------------------------下面定義服務(wù)器，也就是監(jiān)控項------------------------------------------
- define service{
- use generic-service
- host_name 10.155.2.81-cacti
- service_description Swap Usage
- check_command check_nrpe!check_swap
- }
- define service{
- use generic-service
- host_name 10.155.2.81-cacti
- service_description Current Load
- check_command check_nrpe!check_load
- }
- define service{
- use generic-service
- host_name 10.155.2.81-cacti
- service_description Partition Usage
- check_command check_nrpe!check_hda1
- }
- define service{
- use generic-service
- host_name 10.155.2.81-cacti
- service_description Current Users
- check_command check_nrpe!check_users
- }
- define service{
- use generic-service
- host_name 10.155.2.81-cacti
- service_description Total Processes
- check_command check_nrpe!check_total_procs
- }
- define service{
- use generic-service
- host_name 10.155.2.81-cacti
- service_description PING
- check_command check_nrpe!check_ping81
- }
重啟nagios，ie瀏覽(圖3)
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