RedHat6.5上部署Nagios
部署环境：系统，RedHat 6.5;组件，Nagios;
部署前准备：关闭Selinux,和防火墙（/etc/init.d/iptables stop）；获取相关软件包。
（包括gd-devel mysql-server openssl-devel xinetd;等）
具体步骤：
1.在Nagios运行的主机上创建Nagios用户和nagcmd组；
groupadd nagcmd;
useradd -M -d /usr/local/nagios -G nagcmd nagios;
usermod -G nagcmdapache
2.解压相应的源码包和插件包；并指定编译环境和参数；
cd /guo
tar jxf nagios-cn-3.2.3.tar.bz2;
cd nagios-cn-3.2.3
###指定编译环境组为"ngcmd";
./configure --with-command-group=nagcmd;
###开始编译并安装
make all && make install
###安装启动脚本
make install-init;
###安装WEB配置文件
make install-webconf;
###安装配置文件
make install-config;
###设定Nagios的登陆用户名和密码；
htpasswd/usr/local/nagios/etc/htpasswd.users nagiosadmin
##＃检查配置正确性
/usr/local/nagios/bin/nagios-v /usr/local/nagios/etc/nagios.cfg
确保无Error 或者warning。
3.启动相关服务并测试；
/etc/init.d/nagios start
/etc/init.d/httpd start
http://s1.运维网.com/wyfs02/M00/82/94/wKioL1dcBb-CwgyeAAB5LF5Syxs915.jpg-wh_500x0-wm_3-wmp_4-s_3458755083.jpg
http://s1.运维网.com/wyfs02/M00/82/94/wKioL1dcBb_jtF8zAADWdx6xgIw262.jpg-wh_500x0-wm_3-wmp_4-s_92981183.jpg
4.安装相关插件。
cd /guo
tar zxf nagios-plugins-2.1.1.tar.gz
cd nagios-plugins-2.1.1
./configure
###执行完毕应确保自身所需的功能后面的状态显示“yes”;比如后面要用到Mysql和ssl协议加密；那结果至少包含"--with-mysql:yes,--with-openssl:yes"
###插件会被自动安装至/usr/local/nagios/libexec；
cd /usr/local/nagios/libexec;
###调整并递归此目录下所有文件
chown nagios.nagios . -R ；
###再次检查配置
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
###重载Nagios配置
/etc/init.d/nagios reload
http://s5.运维网.com/wyfs02/M01/82/94/wKioL1dcBhKghMaAAAEDuOHGvUU756.jpg-wh_500x0-wm_3-wmp_4-s_3585773057.jpg
5.编辑相关配置文件。
cd /usr/local/nagios/etc/objects/
cp-p localhost.cfg hosts.cfg
cp -p localhost.cfg services.cfg
vim /usr/local/nagios/etc/objects/hosts.cfg
###添加如下内容：
###通过hosts.cfg文件来指定被监控主机及其相关信息；
cfg_file=/usr/local/nagios/etc/objects/hosts.cfg
###通过services.cfg文件定义监控哪些服务和资源。
cfg_file=/usr/local/nagios/etc/objects/services.cfg
###vi hosts.cfg
definehost{
use linux-server
host_name pu_tao.example.com
alias Manager
address 172.25.254.18
icon_image server.gif
statusmap_image server.gd2
2d_coords 500,200
3d_coords 500,200,100
}
define hostgroup{
hostgroup_namelinux-servers
alias Linux Servers
members *
}
本次取一台被监控主机做实验，仅写一个服务组
define servicegroup{
servicegroup_name 系统负荷检查
alias 负荷检查
members server2.example.com,进程总数,server2.example.com用户登录 数,server2.example.com,根分区,server2.example.com,交换空间利用率
}
监控ping的情况
defineservice{
use local-service
host_name *
service_description PING
check_command check_ping!100.0,20%!500.0,60%
}
监控硬盘情况
defineservice{
use local-service
host_name xi_gua.example.com
service_description 根分区
check_command check_local_disk!20%!10%!/
}
监控登录用户数
defineservice{
use local-service
host_name xi_gua.example.com
service_description 登录用户数
check_command check_local_users!20!50
}
监控系统负荷
define service{
use local-service
host_name xi_gua.example.com
service_description 系统负荷
check_command check_local_load!5.0,4.0,3.0!10.0,6.0,4.0
}
监控进程总数
defineservice{
use local-service
host_name xi_gua.example.com
service_description 进程总数
check_command check_local_procs!250!400!RSZDT
}
监控交换空间利用率
define service{
use local-service
host_name xi_gua.example.com
service_description 交换空间利用率
check_command check_local_swap!20!10
}
监控ssh情况
define service{
use local-service
host_name xi_gua.example.com
service_description SSH
check_command check_tcp!22!1.0!10.0
notifications_enabled 0
}
监控apache
defineservice{
use local-service
host_name xi_gua.example.com
service_description HTTP
check_command check_http
notifications_enabled 0
}
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
/etc/init.d/nagios reload
如图显示本机的监控成功
http://s2.运维网.com/wyfs02/M02/82/96/wKiom1dcBSLQ3tLWAADSByDW57k005.jpg-wh_500x0-wm_3-wmp_4-s_3355481606.jpg
6.再开启一台主机。本次实验主机名为xi_gua.example.com.ip:172.25.254.17；同样关闭Selinux和防火墙。
在本机上安装Mysql;并创建用户Nagios和赋予一定权限。
create database nagdb；
grant select on nagdb.* tonagios@172.25.254.18 identified by'nagios'；
返回Nagios所在主机pu_tao.example.com;
cd /usr/local/nagios/libexec
./check_mysql -H 172.25.254.3 -unagios -pnagios
执行完毕应有类似日志信息显示；如有且无报错说明本机成功监控对端mysql
cd /usr/local/nagios/etc/objects
在 commands.cfg 中添加监控mysql的命令
# 'check_mysql' command definition
definecommand{
command_name check_mysql
command_line $USER1$/check_mysql -H $HOSTADDRESS$ -u $ARG1$ -p $ARG2$
}
在services.cfg中添加监控mysql
##########################check_mysql
define service{
use local-service
host_name xi_gua.example.com
service_description MYSQL
check_command check_mysql!nagios!nagios
notifications_enabled 0
}
在hosts.cfg中添加
define host{
use linux-server
host_name xi_gua.example.com
alias Manager
parents xi_gua.example.com
address 172.25.254.17
icon_image server.gif
statusmap_image server.gd2
2d_coords 400,100
3d_coords 400,100,100
}
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
/etc/init.d/nagios reload
如图表示成功检测server3主机上的mysql
http://s5.运维网.com/wyfs02/M02/82/94/wKioL1dcBmCAe4BQAAMGdn9RSv0909.jpg-wh_500x0-wm_3-wmp_4-s_3541816067.jpg
8.安装Nrpe使nagios监控多台主机；在172.25.254.17（xi_gua.example.com）上操作。
###解压相关组件并创建nagios用户；
tar zxfnrpe-2.15.tar.gz
tar zxfnagios-plugins-2.1.1.tar.gz
yum install mysql-devel openssl-devel -y
useradd-M -d /usr/local/nagiosnagios
cd nagios-plugins-2.1.1
./configure
make all && make install
cd /usr/local/nagios/libexec/
chown nagios.nagios . -R
yum install xinetd
cd /root/nrpe-2.15
./configure
make all && make install
make install-plugin
make install-daemon
make install-daemon-config
make install-xinetd
vim /etc/xinetd.d/nrpe
#设定监控主机为172.25.254.18
only_from = 172.25.254.18
vim /etc/services
nrpe 5666/tcp
/etc/init.d/xinetd start
cd /usr/local/nagios/etc/
vim nrpe.cfg
将command=/usr/local/nagios/libexec/check_disk-w 20% -c 10% -p /dev/hda1改为
command=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p/＃监控根分区
/etc/init.d/xinetdrestart
cd /usr/local/nagios/libexec/
scpcheck_nrpe root@172.25.254.18:/usr/local/nagios/libexec/ 将check_nrpe远程复制到pu_tao.exampl.com相应的目录中。
返回172.25.254.18；做如下操作
cd /usr/local/nagios/libexec/
chown nagios.nagioscheck_nrpe
###检测nrpe是否可用成功显示nrpe版本号
./chek_nrpe-H172.25.254.17
cd /usr/local/nagios/etc/objcts/
在 commands.cfg 中添加check_nrpe的命令
# 'check_nrpe' commanddefinition
define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c$ARG1$
}
在services.cfg中添加
define service{
use local-service
host_name xi_gua.example.com
service_description 根分区
check_command check_nrpe!check_disk
}
define service{
use local-service
host_name xi_gua.example.com
service_description 登录用户数
check_command check_nrpe!check_users
}
监控根分区和登录人数
/usr/local/nagios/bin/nagios -v/usr/local/nagios/etc/nagios.cfg
/etc/init.d/nagios reload
如图可见监控成功
http://s4.运维网.com/wyfs02/M00/82/96/wKiom1dcBauirfAbAAN9vSS-aOo701.png-wh_500x0-wm_3-wmp_4-s_2877345632.png
http://s3.运维网.com/wyfs02/M02/82/96/wKiom1dcBa3TSG0kAAQvyp3nVdI329.png-wh_500x0-wm_3-wmp_4-s_4276468907.png
9.nagios的110云报警
到onealter官网下载所用的软件包这里用的是
alert-agent-4.1.3.1-linux-x64.tar.gz
在onealter网页添加nagios应用
http://s5.运维网.com/wyfs02/M00/82/94/wKioL1dcBv6h7Nl8AAMOWHilbGQ729.png-wh_500x0-wm_3-wmp_4-s_733819793.png
获取应用key
http://s5.运维网.com/wyfs02/M01/82/96/wKiom1dcBgGjKZT7AALteRKzORU481.png-wh_500x0-wm_3-wmp_4-s_3503590603.png
http://s3.运维网.com/wyfs02/M01/82/94/wKioL1dcBy2wLQ5VAAMJmfMl048280.png-wh_500x0-wm_3-wmp_4-s_1694839993.png
在xi_gua.example.com主机中：
tar zxf alert-agent-4.1.3.1-linux-x64.tar.gz
cp -R alert-agent /usr/local/nagios/libexec/#将解压好的包放入nagios插件目录中
cp alert-agent/plugin/nagios-plugin/nagios /usr/local/nagios/libexec/
chmod +x /usr/local/nagios/libexec/nagios
cp alert-agent/plugin/nagios-plugin/110monitor.cfg/usr/local/nagios/etc/objects/ #将110配置文件放入nagios配置文件目录
在110monitor.cfg文件中添加Key：
http://s1.运维网.com/wyfs02/M02/82/96/wKiom1dcBjLDMwzhAAJlrq4ZKBg839.png-wh_500x0-wm_3-wmp_4-s_860917685.png
修改/usr/local/nagios/etc/objects/contacts.cfg，新增110monitor到默认联系组
define contactgroup{
contactgroup_name admins
alias Nagios Administrators
members nagiosadmin,110monitor
}
修改/usr/local/nagios/etc/nagios.cfg，将110monitor.cfg新增到nagios.cfg中
cfg_file=/usr/local/nagios/etc/objects/110monitor.cfg
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
/etc/init.d/nagios reload
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