Nagios+Centreon+Nrpe集成（二）

4、centreon集成

4.1应用程序安装

###版本：centreon-2.3.9.tar.gz

下载地址：http://www.centreon.com/Content-Download/donwload-centreon

安装参考文档：（1）http://documentation.centreon.com/01-centreon/centreon_web/documentation/01-setup/installation_from_sources/step_05_-_centreon

（2）http://blog.sina.com.cn/s/blog_5611597901016qd2.html

# tar zxvf centreon-2.3.9.tar.gz

# cd centreon-2.3.9

# ./install.sh -i //以下是安装过程中需要根据实际路径修改的地方，其他均为y回车（当然你也可以自己定制）

Where is your NDO ndomod binary ?

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default to [/usr/sbin/ndomod.o]

> /usr/local/nagios/bin/ndomod.o

/usr/local/nagios/bin/ndomod.o                             OK

4.2 web installation

(1)以下服务均已启动

# /etc/init.d/apache2 start

# /etc/init.d/MySQLd start

# /etc/init.d/ndo2db start

# /etc/init.d/nagios start

(2)开始安装：http://192.168.113.5/centreon/

###备注参考内容：

http://documentation.centreon.com/01-centreon/centreon_web/documentation/01-setup/installation_from_sources/step_05_-_centreon

http://blog.sina.com.cn/s/blog_5611597901016qd2.html

###部分配图：其他基本next

图示1：mysql root密码填写，三个新库密码设置

图示2：配置centreon管理员用户、密码、其他三项自定义

4.3在线安装nagios后

Centreon安装时，其他应用在线安装的，需要修改以下可能出现的路径问题：

Where is installed Nagios ?

default to [/usr/local/nagios]

>  /usr/share/nagios3/

Path /usr/share/nagios3/                                   OK

Where is your nagios config directory

default to [/usr/local/nagios/etc]

> /etc/nagios3

Path /etc/nagios3                                          OK

Where is your Nagios var directory ?

default to [/usr/local/nagios/var]

>  /var/log/nagios3/

Path /var/log/nagios3/                                     OK

Where is your Nagios plugins (libexec) directory ?

default to [/usr/local/nagios/libexec]

> /usr/lib64/nagios/plugins

Path /usr/lib64/nagios/plugins                             OK

/usr/sbin/nagios3                                          OK

Where is your Nagios p_w_picpath directory ?

default to [/usr/local/nagios/share/p_w_picpaths/logos]

> /usr/share/nagios3/htdocs/p_w_picpaths/logos/

Path /usr/share/nagios3/htdocs/p_w_picpaths/logos/               OK

Where is your NDO ndomod binary ?

default to [/usr/sbin/ndomod.o]

> /usr/lib/ndoutils/ndomod-mysql-3x.o

/usr/lib/ndoutils/ndomod-mysql-3x.o                        OK

4.4 Web安装centreon完成后

###参考链接：http://www.xodino.it/?page_id=968

Finalize Centreon configuration:

Open in webrowser: "http:///centreon/", replace "" with your Centreon server ip address or hostname.

Go to: Configuration -> Nagios -> cgi (in sidebar), Press on "CGI.cfg" link

Change settings to some options, as writed below:

- Physical HTML Path: /usr/share/nagios3/htdocs

- URL HTML Path : /nagios3

- Nagios Process Check Command: /usr/lib/nagios/plugins/check_nagios /var/cache/nagios3/status.dat 5 '/usr/sbin/nagios3'

Press Save

Go to: Configuration -> Nagios -> nagios.cfg (in sidebar), Press on "Nagios CFG 1" link, you should be in "Files" section of the configuration screen.

Make sure to set folowing configuration values:

- Log File : /var/log/nagios3/nagios.log

- Downtime File : /var/lib/nagios3/downtime.dat

- Comment File : /var/lib/nagios3/comment.dat

- Temp File : /var/cache/nagios3/nagios.tmp

- P1 File : /usr/lib/nagios3/p1.pl

- Lock File : /var/run/nagios3/nagios3.pid

- Object Cache File : /var/cache/nagios3/objects.cache

- Status File : /var/cache/nagios3/status.dat

- External Command File : /var/lib/nagios3/rw/nagios.cmd

Now Press on "Logs Options" tab to go to "Logs Options" section.

Make sure to set folowing configuration values:

- Log Archive Path : /var/log/nagios3/archives/

- State Retention File : /var/lib/nagios3/retention.dat

Press Save

Go to: Administration -> Options -> CentStorage (in sidebar)

Make sure to set folowing configuration values:

- Nagios current log file to parse: /var/log/nagios3/nagios.log

Press Save

Now let's apply our changes, go to: Configuration -> Nagios

Select as below:

- Generate Configuration Files

- Include Comments

- Run Nagios debug (-v)

- Move Export Files

- Restart Nagios

- Method: "External Command"

Press Export

This will restart Nagios & apply all changes you made in Web Interface.

You will do it every time you make changes, e.g. adding/modifying of hosts, commands, contacts, services...etc...

The installation of Centreon is completed.

Final fixes (very important):

Go to terminal console, then...

In Debian/Ubuntu the user "nagios" is set to "/bin/false" shell. Because of it "centcore" and "centstorage" daemons won't start. A reason for that is because those daemons use "su -c" command which requires a real shell, so the shell for

"nagios" user must be set to "/bin/sh":

# usermod -s /bin/sh nagios

Apply permissions for Web interface to be able to send "External Commands", perform the following commands to change directory permissions and to make the changes permanent:

# invoke-rc.d nagios3 stop

# dpkg-statoverride --update --add nagios www-data 2710 /var/lib/nagios3/rw

# dpkg-statoverride --update --add nagios nagios 751 /var/lib/nagios3

Add htaccess user with password "P@ssw0rd" for nagios CGI:

# htpasswd -bc /etc/nagios3/htpasswd.users nagiosadmin P@ssw0rd

Allow SNMP readonly access:

# echo "rocommunity public" > /etc/snmp/snmpd.conf

If you want to allow SNMP access only for localhost then use this instead:

# echo "rocommunity public 127.0.0.1" > /etc/snmp/snmpd.conf

# ls -al /usr/lib/nagios/plugins  //查看权限，需要具有sudo权限

# cd /usr/lib/nagios/

# chmod -R u+s plugins   //权限修改成 ：-rwsr-xr-x

###不修改权限会报：Warning: This plugin must be either run as root or setuid root.

Now, restart the server

# reboot

4.5常规信息监控

4.5.1激活配置

# /etc/init.d/nagios3 reload

# /etc/init.d/centcore restart or start

# /etc/init.d/centstorage restart or start

# /etc/init.d/ndoutils restart

# /etc/init.d/nagios-nrpe-server restart

4.5.2监控本机

（1）配置监控主机

（2）定义主机服务

Go to: Configuration -> Serivces -> Add -> Services by host

Add---关系（Relations）保存后生效，然后激活配置

4.5.3通过nrpe插件监控本机

（1）定义check_nrpe命令

命令名：check_nrpe

命令行：$USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$

Go to: Configuration -> Commands -> Checks -> Add -> Services by host

（2）nrpe常用模版修改

# vim /etc/nagios/nrpe.cfg

# The following examples use hardcoded command arguments...

command[check_users]=/usr/lib/nagios/plugins/check_users -w 5 -c 10

command[check_load]=/usr/lib/nagios/plugins/check_load -w 15,10,5 -c 30,25,20

#command[check_hda1]=/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -p /dev/hda1

command[check_disk]=/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -p /

command[check_zombie_procs]=/usr/lib/nagios/plugins/check_procs -w 5 -c 10 -s Z

command[check_total_procs]=/usr/lib/nagios/plugins/check_procs -w 150 -c 200

（3）添加check_load

Go to: Configuration -> Services -> Templates -> Add -> Save

依次对照填写以下内容

（3）关联模版

因为 Centreon-Server继承的是generic-host主机模板，所以我们在generic-host模板里将刚才的服务模板都关联上

Go to: Configuration -> HOsts -> Templates -> generic-host –> Relations

Go to: Configuration -> HOsts -> Centreon-Server

再次查看Centreon-Serve服务，已经生成  //若没有以下状态，可以重启nagios-nrpe-server或ndoutils服务

Go to: Monitoring -> Services -> All Serveices

4.6 Linux客户端监控

# apt-get install build-essential

4.6.1 nagios-plugins install

# groupadd nagios    # useradd –g nagios nagios

# tar zxvf  nagios-plugins-1.4.16.tar.gz

# cd nagios-plugins-1.4.16/

# ./configure

# make && make install

# chown nagios.nagios /usr/local/nagios

# chown -R nagios.nagios /usr/local/nagios/libexec

4.6.2 nrpe install

# apt-get install libssl-dev

# tar zxvf nrpe-2.13.tar.gz //以下为源码安装

# cd nrpe-2.13

# ./configure

# make all

# make install-plugin

# make install-daemon

# make install-daemon-config

# vim /usr/local/nagios/etc/nrpe.cfg

allowed_hosts=127.0.0.1,192.168.113.5

# The following examples use hardcoded command arguments...

command[check_users]=/usr/lib/nagios/plugins/check_users -w 5 -c 10

command[check_load]=/usr/lib/nagios/plugins/check_load -w 15,10,5 -c 30,25,20

#command[check_hda1]=/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -p /dev/hda1

command[check_desk]=/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -p /

command[check_zombie_procs]=/usr/lib/nagios/plugins/check_procs -w 5 -c 10 -s Z

command[check_total_procs]=/usr/lib/nagios/plugins/check_procs -w 150 -c 200

# cp init-script.debian /etc/init.d/nrpe

# chmod +x /etc/init.d/nrpe    # /etc/init.d/nrpe start

# netstat -antup |grep 5666

# /usr/local/nagios/libexec/check_nrpe -H 127.0.0.1  //在线安装路径

# /usr/lib/nagios/plugins/check_nrpe -H 192.168.113.6 //在监控服务器上

4.6.3 web centreon configuration

（1）Go to: Configuration -> HOsts -> Templates ->Servers-Linux –> Relations -> Save

（2）Go to: Configuration -> HOsts -> Add –> Save

4.6可能的报错信息

（1）报错解决：

Error: Could not create external command file '/var/log/nagios3/rw/nagios.cmd'

解决：mkdir /var/log/nagios3/rw

Chown nagios.nagios rw

（2）在线安装ndoutils，启动ndo2前一定要修改：/etc/default/ndoutils

ENABLE_NDOUTILS=1