Nagios+Centreon+Nrpe集成（二）

4、centreon集成

4.1應用程序安裝

### 版本：centreon-2.3.9.tar.gz

下載地址：http://www.centreon.com/Content-Download/donwload-centreon

安裝參考文檔：（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 //以下是安裝過程中需要根據實際路徑修改的地方，其他均為y 回車（當然你也可以自己定制）

Where is your NDO ndomod binary ?

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

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

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

4.2 web installation

(1)以下服務均已啟動

# /etc/init.d/apache2 start

# /etc/init.d/mysqld start

# /etc/init.d/ndo2db start

# /etc/init.d/nagios start

(2)開始安裝：http://192.168.113.5/centreon/

### 備注參考內容：

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

### 部分配圖：其他基本next

圖示1：mysql root密碼填寫，三個新庫密碼設置

圖示2：配置centreon管理員用戶、密碼、其他三項自定義

4.3在線安裝nagios后

Centreon安裝時，其他應用在線安裝的，需要修改以下可能出現的路徑問題：

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 安裝centreon完成后

### 參考鏈接：http://www.xodino.it/?page_id=968

Finalize Centreon configuration:

Open in webrowser: "http://<yourserverip>/centreon/", replace "<yourserverip>" 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  //查看權限，需要具有sudo權限

# cd /usr/lib/nagios/

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

### 不修改權限會報：Warning: This plugin must be either run as root or setuid root.

Now, restart the server

# reboot

4.5 常規信息監控

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監控本機

（1）配置監控主機

（2）定義主機服務

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

Add---關系（Relations）保存后生效，然后激活配置

4.5.3通過nrpe插件監控本機

（1）定義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

依次對照填寫以下內容

（3）關聯模版

因為 Centreon-Server繼承的是generic-host主機模板，所以我們在generic-host模板里將剛才的服務模板都關聯上

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

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

再次查看Centreon-Serve服務，已經生成  //若沒有以下狀態，可以重啟nagios-nrpe-server 或ndoutils 服務

Go to: Monitoring -> Services -> All Serveices

4.6 Linux客戶端監控

# 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 //以下為源碼安裝

# 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  //在線安裝路徑

# /usr/lib/nagios/plugins/check_nrpe -H 192.168.113.6 //在監控服務器上

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 可能的報錯信息

（1）報錯解決：

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

解決：mkdir /var/log/nagios3/rw

Chown nagios.nagios rw

（2）在線安裝ndoutils，啟動ndo2前一定要修改：/etc/default/ndoutils

ENABLE_NDOUTILS=1