Cacti/nagios/ntop整合之三：安装nagios
服务器端:需要先安装gcc1.创建nagios用户：useradd -m nagios
2.安装nagios主程序
tar zxvf nagios-3.2.2.tar.gz
cd nagios-3.2.2
./configure --with-command-group=nagios
make all
make install
make install-init
make install-config
make install-commandmode
make install-webconf
htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
3.安装nagios-plugins
tar zxvf nagios-plugins-1.4.15.tar.gz
cd nagios-plugins-1.4.15
./configure --with-nagios-user=nagios --with-nagios-group=nagios
make
make install
4.检查语法： /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
5.设置开机启动chkconfig nagios on
启动nagios：service nagios start
6.通过web页面访问:http://xx.xx.xx.xx/nagios
安装ndoutils，使nagios的信息存入mysql
1.
tar zxf ndoutils-1.4b7.tar.gz
cd ndoutils-1.4b7
./configure --enable-mysql --disable-pgsql
make
-------------创建nagios用的数据库---------------------
如果与cacti整合的话，安装npc插件时已经在cacti的数据库创建了nagios的需要表，这些表均以“npc_”为前缀，可跳过此步骤。
mysql -uroot -p
mysql> create database ndodb;
mysql> GRANT ALL PRIVILEGES ON ndodb.* TO ndouser@localhost IDENTIFIED BY '123456';
mysql> flush privileges;
生成ndoutils所需要的数据库表等，这些表默认以“nagios_”为前缀；install脚本命令必须在db子目录内执行：
cd db
./installdb -u ndouser -p 123456 -h localhost -d ndodb
或者 mysql -u root -p -D nagios -h localhost < ./db/mysql.sql
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2.拷贝命令文件和配置文件
cpsrc/{ndomod-3x.o,ndo2db-3x,file2sock,log2ndo}/usr/local/nagios/bin
cpconfig/{ndo2db.cfg,ndomod.cfg-sample'} /usr/local/nagios/etc
chown nagios.nagios /usr/local/nagios/etc/*
chown nagios.nagios /usr/local/nagios/bin/*
3.修改配置文件
vim /usr/local/nagios/etc/nagios.cfg
在文件中添加：
broker_module=/usr/local/nagios/bin/ndomod-3x.o config_file=/usr/local/nagios/etc/ndomod.cfg
检查是否有event_broker_options=-1这一行
vim /usr/local/nagios/etc/ndo2db.cfg
ndo2db_user=nagios
ndo2db_group=nagios
socket_type=unix
socket_name=/usr/local/nagios/var/ndo.sock
db_name=cactidb 以下四项与安装cacti的npc插件时生成的数据库参数一样
db_prefix=npc_
db_user=cactier
db_pass=123456
vim /usr/local/nagios/etc/ndomod.cfg
output_type=unixsocket
output=/usr/local/nagios/var/ndo.sock
4.启动ndo2db守护进程
/usr/local/nagios/bin/ndo2db-3x -c /usr/local/nagios/etc/ndo2db.cfg
echo '/usr/local/nagios/bin/ndo2db-3x -c /usr/local/nagios/etc/ndo2db.cfg' >> /etc/rc.local
重新启动nagios
安装Nagios Plugin for Cacti（NPC）插件
用于将nagios的数据通过ndo2db导入到mysql数据库，然后cacti读取数据库信息将nagios的结果通过NPC展示出来。
tar zxvf npc-2.0.4.tar.gz
mv npc /var/www/html/cacti/plugins/
登陆cacti 设置plugins
如果npc不显示内容，需要安装json：
tar xjvf php-json-ext-1.2.0.tar.bz2
./configure
make
make install
修改etc/php.ini添加 extension=json.so
配置nagios客户端
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