系统版本及信息
cat /etc/redhat-release
CentOS release 6.2 (Final)
uname -a
Linux 2.6.32-220.el6.x86_64 x86_64 x86_64 x86_64 GNU/Linux
ifconfig |sed -n 1,2p
eth0 Link encap:Ethernet HWaddr 40:F2:E9:29:5F:EA
inet addr:192.168.0.2 Bcast:192.168.69.255 Mask:255.255.255.0
关闭 Iptables selinux 软件版本信息
LAMP/LNMP 忽略，任何一个环境都可以，我这里是yum 安装的LNMP环境
nagios-4.0.5.tar.gz
nagios-plugins-1.4.16.tar.gz
nrpe-2.15.tar.gz
pnp4nagios-0.6.19.tar.gz 安装Nagios软件准备工作
确保 yum 能正常使用，建议是配置网络 yum ，安装系统所需库文件
yum groupinstall "Compatibility libraries" "Base" "Development tools"
安装lamp及所需包
yum -y install http* php* mysql* perl* net-snmp* openssl* glibc rrdtoolrrdtool-devel rrdtool-perl rrdtool-php
chkconfig mysqld on
chkconfig httpd on
chkconfig snmpd on
service httpd start
service mysqld start
service snmpd start
测试ok 继续下一步
ps -ef | grep -v grep | grep http mysql snmp #分别查看，web页面访问测试 安装Nagios
1、创建nagios程序用户、组
[root@nagios ~]# useradd -s /sbin/nologin nagios
[root@nagios ~]# mkdir /usr/local/nagios
[root@nagios ~]# chown -R nagios.nagios /usr/local/nagios/
2、编译安装nagios
[root@nagios tools]# tar zxf nagios-4.0.5.tar.gz
[root@nagios tools]# cd nagios-4.0.5
[root@nagios nagios-4.0.5]# ./configure --prefix=/usr/local/nagios
[root@nagios nagios-4.0.5]# make all &&make install && make install-init && make install-commandmode&& make install-config && make install-webconf
[root@nagios nagios-4.0.5]# echo $?
0
3、加入开机启动
chkconfig --add nagios
chkconfig nagios on
chkconfig--list nagios 安装nagios-plugins 插件
[root@nagios tools]# tar zxf nagios-plugins-1.4.16.tar.gz
[root@nagios tools]# cd nagios-plugins-1.4.16
[root@nagios tools nagios-plugins-1.4.16]# ./configure --prefix=/usr/local/nagios/
[root@nagios tools nagios-plugins-1.4.16]# make
[root@nagios tools nagios-plugins-1.4.16]# make install
[root@nagios tools nagios-plugins-1.4.16]# echo $?
0 编辑http.conf配置文件
cd /etc/httpd/conf
cp -a httpd.conf httpd.conf.bak
vim httpd.conf # 添加在最后面即可
####### setting for nagios #######
ScriptAlias /nagios/cgi-bin "/usr/local/nagios/sbin"
AuthType Basic
Options ExecCGI
AllowOverride None
Order allow,deny
Allow from all
AuthName "nagios access"
AuthUserFile /usr/local/nagios/etc/htpasswd
Require valid-user
Alias /nagios "/usr/local/nagios/share"
AuthType Basic
Options ExecCGI
AllowOverride None
Order allow,deny
Allow from all
AuthName "nagios access"
AuthUserFile /usr/local/nagios/etc/htpasswd
Require valid-user
修改
DirectoryIndex index.html index.html.var
为
DirectoryIndex index.php index.html index.html.var
修改
Options Indexes FollowSymLinks
为
Options FollowSymLinks #防止网站列目录
service httpd restart
增加nagios登陆认证文件，一定要用默认的nagiosadmin作为用户，否则需要修改其他文件，修改之前备份，这里就不备份了
[root@nagios etc]# cd /usr/local/nagios/etc
[root@nagios etc]# sed -i s@nagiosadmin@nagiosadmin\,admin@g cgi.cfg
[root@nagios etc]# sed -i s@\#default_user_name=guest@default_user_name=admin@g cgi.cfg
[root@nagios nagios]# htpasswd -c /usr/local/nagios/etc/htpasswd admin
New password: ******
Re-type new password:****** 安装 Nrpe 插件
检测nagios
[root@nagios etc]# /usr/local/nagios/bin/nagios-v /usr/local/nagios/etc/nagios.cfg
Total Warnings: 0
Total Errors: 0 表示OK 启动nagios
[root@nagios etc]# service nagios start stop restart 开启 停止 重启
http://IP/nagios 安装 pnp4nagios 插件
[root@nagios tools]# tar zxf pnp4nagios-0.6.19.tar.gz
[root@nagios tools]# cd pnp4nagios-0.6.19
[root@nagios tools pnp4nagios-0.6.19]#./configure
make all
make install
make install-config
make install-init
make install-webconf
创建默认配置文件
cd /usr/local/pnp4nagios/etc
cp misccommands.cfg-sample misccommands.cfg
cp nagios.cfg-sample nagios.cfg
cp rra.cfg-sample rra.cfg
cd pages
cp web_traffic.cfg-sample web_traffic.cfg
cd ../check_commands/
cp check_all_local_disks.cfg-samplecheck_all_local_disks.cfg
cp check_nrpe.cfg-sample check_nrpe.cfg
cp check_nwstat.cfg-sample check_nwstat.cfg
cp /usr/local/pnp4nagios/libexec/* /usr/local/nagios/libexec/
vim /usr/local/nagios/etc/nagios.cfg
检查
enable_environment_macros=1
process_performance_data=1
host_perfdata_command=process-host-perfdata
service_perfdata_command=process-service-perfdata
提示：如果nagios版本是4.X，上面配置会导致后面，生成不了流量图，报如下错误
PNP4Nagios Version 0.6.19
Please check the documentation for information about the following error.
perfdata directory "/usr/local/pnp4nagios/var/perfdata/localhost" for host "localhost" does not exist.Read FAQ online
file [line]:
application/models/data.php [148]:
back
出现这个错误的原因是参照解决方案是使用 Bulk Mode方式
vim /usr/local/nagios/etc/nagios.cfg
检查
enable_environment_macros=1
process_performance_data=1
添加到最后即可
# service performance data
service_perfdata_file=/usr/local/pnp4nagios/var/service-perfdata
service_perfdata_file_template=DATATYPE::SERVICEPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tSERVICEDESC::$SERVICEDESC$\tSERVICEPERFDATA::$SERVICEPERFDATA$\tSERVICECHECKCOMMAND::$SERVICECHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$\tSERVICESTATE::$SERVICESTATE$\tSERVICESTATETYPE::$SERVICESTATETYPE$
service_perfdata_file_mode=a
service_perfdata_file_processing_interval=15
service_perfdata_file_processing_command=process-service-perfdata-file
# host performance data starting with Nagios 3.0
host_perfdata_file=/usr/local/pnp4nagios/var/host-perfdata
host_perfdata_file_template=DATATYPE::HOSTPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tHOSTPERFDATA::$HOSTPERFDATA$\tHOSTCHECKCOMMAND::$HOSTCHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$
host_perfdata_file_mode=a
host_perfdata_file_processing_interval=15
host_perfdata_file_processing_command=process-host-perfdata-file
保存
vim /usr/local/nagios/etc/objects/commands.cfg
define command{
command_name check_nrpe
command_line $USER1$/check_nrpe-H $HOSTADDRESS$ -c $ARG1$
} #这一段放在上面即可
如下：同步模式设定方法添加到末尾就可以，记住在这个配置文件里面， 默认有这个配置，需要找到注释掉，然后将下面的配置添加，如果不注释掉，在你检查nagios的配置文件的时候会报错
define command{
command_name process-service-perfdata-file
command_line /usr/local/pnp4nagios/libexec/process_perfdata.pl --bulk=/usr/local/pnp4nagios/var/service-perfdata
}
define command{
command_name process-host-perfdata-file
command_line /usr/local/pnp4nagios/libexec/process_perfdata.pl --bulk=/usr/local/pnp4nagios/var/host-perfdata
}
定义pnp的主机和服务两个模版添加在最后面
vim /usr/local/nagios/etc/objects/templates.cfg
define host {
name host-pnp
action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=_HOST_
register 0
}
define service {
name service-pnp
action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=$SERVICEDESC$
register 0
}
也可以添加在，其他参数下面省略了，下面这个方法可以减少很多配置主机启用pnp时的时间
vim /usr/local/nagios/etc/objects/templates.cfg
define host {
action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=_HOST_
}
define service {
action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=$SERVICEDESC$
}
先做一下pnp4nagios环境测试添加在httpd.conf最后面
vim /etc/httpd/conf/httpd.conf
Alias /pnp4nagios "/usr/local/pnp4nagios/share"
AllowOverride None
Order allow,deny
Allow from all
AuthName "Nagios Access"
AuthType Basic
AuthUserFile /usr/local/nagios/etc/htpasswd
Require valid-user
提示：此操作只是启用了linux主机监控，没有启用windows和switch，如果需要把注释去掉即可，第一种和第二种都可以
区别是：第一种共同使用一个配置文件，第二种独立使用配置文件，这里我都会演示，下面以第一种和第二种进行区分 添加主机配置，第一种方法
默认nagios/etc/objects/ 下面没有 service.cfg host.cfg hostgroup.cfg 这几个配置文件，需要手动添加
vim hosts.cfg
define host{
use linux-server,host-pnp #这个是根据templates.cfg信息定义，如果上面定义的模板host-pnp添加在define host和define sevice里面，这儿host-pnp可以不用加，因为linux-server已经包含了
host_name cacti #必须是 被监控的主机名
alias cacti-web #别名随便定义
address 192.168.0.3 #主机ip地址
contact_groups admins #邮件组，下面会演示
}
define host{
use linux-server,host-pnp
host_name nginx
alias nginx-web
address 192.168.0.4
contact_groups admins
}
有多少机器就这样添加多少台
vim hostgroup.cfg
define hostgroup{
hostgroup_name servers #组名
alias servers_group #别名
members cacti,nginx #主机名 多个 逗号 隔开
}
vim service.cfg #所有主机在同一配置文件，很乱
#### set cacti host
define service{
use local-service,services-pnp
host_name cacti
service_description http
check_command check_http
contact_groups admins
flap_detection_enabled 0
}
define service{
use local-service,services-pnp
host_name cacti
service_description SSH_port
check_command check_tcp!22
contact_groups admins
flap_detection_enabled 0
}
define service{
use local-service,services-pnp
host_name cacti
service_description check_/
check_command check_nrpe!check_/ #使用nrpe检测，客户端需要定义
contact_groups admins
flap_detection_enabled 0
}
#### set nginx host
define service{
use local-service,service-pnp
host_name nginx
service_description Check_free_mem
check_command check_nrpe!check_free_mem
contact_groups admins
flap_detection_enabled 0
}
define service{
use local-service,services-pnp
host_name nginx
service_description check_/
check_command check_nrpe!check_/ #使用nrpe检测，客户端需要定义
contact_groups admins
flap_detection_enabled 0
}
有多少就需要添加多少，第一种方法 end 添加主机配置，第二种方法
cd nagios/etc/objects/
mkdir app
cd app
vim 192.168.0.2.cfg #在一个独立的文件定义所有监控对象，这个没有定义组，意义不大
###定义host
define host{
use linux-server,host-pnp #这个是根据templates.cfg信息定义，如果上面定义的模板host-pnp添加在define host和define sevice里面，这儿host-pnp可以不用加，因为linux-server已经包含了
host_name nginx #必须是 被监控的主机名
alias nginx-web #别名随便定义
address 192.168.0.4 #主机ip地址
contact_groups admins #邮件组，下面会演示
}
###定义service
define service{
use local-service,service-pnp
host_name nginx
service_description Check_free_mem
check_command check_nrpe!check_free_mem
contact_groups admins
flap_detection_enabled 0
}
define service{
use local-service,services-pnp
host_name nginx
service_description check_/
check_command check_nrpe!check_/ #使用nrpe检测，客户端需要定义
contact_groups admins
flap_detection_enabled 0
}vim 192.168.0.3.cfg
###定义host
define host{
use linux-server,host-pnp #这个是根据templates.cfg信息定义，如果上面定义的模板host-pnp添加在define host和define sevice里面，这儿host-pnp可以不用加，因为linux-server已经包含了
host_name cacti #必须是 被监控的主机名
alias cacti-web #别名随便定义
address 192.168.0.3 #主机ip地址
contact_groups admins #邮件组，下面会演示
}
###定义service
define service{
use local-service,service-pnp
host_name cacti
service_description Check_free_mem
check_command check_nrpe!check_free_mem
contact_groups admins
flap_detection_enabled 0
}
define service{
use local-service,service-pnp
host_name cacti
service_description Check_free_mem
check_command check_nrpe!check_free_mem
contact_groups admins
flap_detection_enabled 0
}
这种办法比第一种方便许多，添加主机2种方法 END nagios邮件报警设置
[root@nagios objects]# vim contacts.cfg #参数详解，请百度
define contact{
contact_name nagiosadmin
use generic-contact
alias Nagios Admin service_notification_period 24x7
host_notification_period 24x7
service_notification_options w,u,c,r
host_notification_options d,u,r
service_notification_commands notify-service-by-email
host_notification_commands notify-host-by-email
email xxxx@163.com
}
define contactgroup{
contactgroup_name admins #这个就是上面那个admins
alias Nagios Administrators
members nagiosadmin
} 检查配置文件是否有错
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
Total Warnings: 0
Total Errors: 0
Things look okay - No serious problems were detected during the pre-flight check
service nagios restart
服务端配置 end 客户端安装配置
PNP4Nagios Version 0.6.19 Please check the documentation for information about the following error.
XML file "/usr/local/pnp4nagios/var/perfdata/app-11/Total_Processes.xml" not found. Read FAQ online file [line]:
application/models/data.php [312]:
back
至于原因可以参考，非常详细
http://storysky.blog.运维网.com/628458/583787/
Nagios如果系统监控插件满足不了需求，可以自行开发插件
例如下面是一个内存监控插件，插件是百度找的还是不错的，我这里借用一下
vim /usr/local/nagios/libexec/check_mem
#!/bin/bash
STAT_OK=0
STAT_WARNING=1
STAT_CRITICAL=2
STAT_UNKNOWN=3
total_mem=`free -m |awk 'NR==2{print $2}'`
used_mem=`free -m |awk 'NR==3{print $3}'` #取的是系统真正用掉的内存
free_mem=`free -m |awk 'NR==3{print $4}'` #取的是free+cache的内存
use_per=`echo "scale=2;$used_mem/$total_mem"|bc|sed 's/^.//g'`
help() {
echo "USAGE:`basename $0` [-w] [-c] [-h]"
exit -1
}
while getopts ":w:c:h" opt
do
case $opt in
w) warning=$OPTARG
;;
c) critical=$OPTARG
;;
h) help
;;
?) unkown=$OPTARG
echo "error,plase check for help,USAGE:./`basename $0` -h"
exit $STAT_UNKNOWN
;;
esac
done
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