完整安装nagios+cacti+短信和邮件报警
一：安装nagios中用到的其他软件和库文件
yum -y install httpd gcc glibc glibc-common gd gd-devel php php-mysql mysql mysql-server mysql-devel openssl-devel
二：安装和配置nagios3.4.1监控主程序 2.1建立用户和组 groupadd nagcmd useradd –m nagios
usermod -a -G nagcmd nagios usermod -a -G nagcmd apache 2.2下载最新版nagios3.4.1 mkdir downloads
wgethttp://prdownloads.sourceforge.net/sourceforge/nagios/nagios-3.4.1.tar.gz 2.3 编译安装 cd downloads
tar –zxvf nagios-3.4.1.tar.gz cd nagios
默认安装至/usr/local/nagios/
./configure --with-command-group=nagcmd --enable-event-broker
make all && make install && make install-init && make install-config && make install-commandmode && make install-webconf
WEB界面的用户名和密码
htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin 输入密码并确认 service httpd restart chkconfig httpd on
三：编译安装nagios-plugins-1.4.16 3.1下载最新版本nagios-plugins-1.4.16 cd downloads
wget http://prdownloads.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.16.tar.gz cd nagios-plugins-1.4.16
./configure --with-nagios-user=nagios --with-nagios-group=nagcmd --with-mysql make && make install chkconfig --add nagios chkconfig nagios on
vim /etc/profile
加入PATH=$PATH:/usr/local/nagios/bin
检查nagios语法是否正确
nagios -v /usr/local/nagios/etc/nagios.cfg
service nagios start
3.2 关闭selinux 及修改iptables或关闭iptables 关闭selinux的方法 vi /etc/sysconfig/selinux添加 SELINUX=disabled
iptables建议开启，然后允许需要开启的端口，一般nagios需要的端口是80和5666（nrpe） vi /etc/sysconfig/iptables
service httpd restart 此时已经能从浏览器访问http://****/nagios默认用户名nagiosadmin 密码是之前输入过的。
四：监控nagios本机
创建fund123目录，用于存放所有相关配置文件 cd /usr/local/nagios/etc/ mkdir fund123
cd /usr/local/nagios/etc/objects cp -v -R * /usr/local/nagios/etc/fund123/ 文件和目录修改下权限
chown -R nagios:nagios fund123
修改主配置文件nagios.cfg，修改之前最好先备份下 vi /usr/local/nagios/etc/nagios.cfg 修改成
cfg_file=/usr/local/nagios/etc/fund123/commands.cfg cfg_file=/usr/local/nagios/etc/fund123/contacts.cfg cfg_file=/usr/local/nagios/etc/fund123/timeperiods.cfg cfg_file=/usr/local/nagios/etc/fund123/templates.cfg cfg_file=/usr/local/nagios/etc/fund123/contactgroups.cfg cfg_file=/usr/local/nagios/etc/fund123/hostgroups.cfg cfg_file=/usr/local/nagios/etc/fund123/servicegroups.cfg cfg_dir=/usr/local/nagios/etc/fund123/servers/ cfg_dir=/usr/local/nagios/etc/fund123/services/
注释掉#cfg_file=/usr/local/nagios/etc/objects/localhost.cfg
cp objects/localhost.cfg fund123/servers/local-nagios.cfg vi local-nagios.cfg
# Define a host for the local machine define host{
use linux-server ; Name of host template to use
; This host definition will inherit all variables that are defined
; in (or inherited by) the linux-server host template definition.
host_name local-nagios alias nagios+cacti address 127.0.0.1 }
注释掉组的定义，后续会在hostgroups里定义 #define hostgroup{
# hostgroup_name linux-servers ; The name of the hostgroup # alias Linux Servers ; Long name of the group
# members localhost ; Comma separated list of hosts that belong to this group # }
通过PING检测主机是否存活 define service{
use local-service ; Name of service template to use host_name local-nagios service_description PING
check_command check_ping!100.0,20%!500.0,60% }
# Define a service to check the disk space of the root partition # on the local machine. Warning if < 20% free, critical if
# < 10% free space on partition.
define service{
use local-service ; Name of service template to use host_name local-nagios service_description Root Partition
check_command check_local_disk!20%!10%!/ }
# Define a service to check the number of currently logged in # users on the local machine. Warning if > 20 users, critical # if > 50 users.
define service{
use local-service ; Name of service template to use host_name local-nagios service_description Current Users
check_command check_local_users!20!50 }
# Define a service to check the number of currently running procs # on the local machine. Warning if > 250 processes, critical if # > 400 users.
define service{
use local-service ; Name of service template to use host_name local-nagios service_description Total Processes
check_command check_local_procs!250!400!RSZDT }
# Define a service to check the load on the local machine.
define service{
use local-service ; Name of service template to use host_name local-nagios service_description Current Load
check_command check_local_load!5.0,4.0,3.0!10.0,6.0,4.0 }
