nagios监控安装

#以前做的笔记，现在自己都看不懂了，日后用再研究吧。
一、Nagios服务端安装：
基础支持套件：

#rpm -q gcc glibc glibc-common gd gd-devel xinetd openssl-devel

如果系统中没有这些套件，使用yum 安装

#yum install -y gcc glibc glibc-common gd gd-devel xinetd openssl-devel
#Yum install  -y  httpd      php       php-gd

1.2创建用户和组：

Useradd -m Nagios
Groupadd nagcmd
Usermod –a –G nagcmd  Nagios
Usermod –a –G nagcmd apache

Nagios 和Apache可以访问同一个目录。

2.安装nagios

tar zxvf nagios-3.4.3.tar.gz
./configure--prefix=/usr/local/nagios--with-command-group=nagcmd
makeall
makeinstall
makeinstall-init
makeinstall-commandmode
makeinstall-config

生成用于登陆nagios的用户密码：

#在上面的配置中，指定了目录验证文件htpasswd，下面要创建这个文件：
htpasswd-c /usr/local/nagios/etc/htpasswd.users darren

修改nagios报警发送邮件地址（需要安装sendmail）

vi /usr/local/nagios/etc/objects/contacts.cfg+35

设置开机启动

chkconfig--add nagios
chkconfig--level 35 nagios on
chkconfig--list Nagios

3.安装nagios插件

tarzxvf nagios-plugins-1.4.16.tar.gz
cdnagios-plugins-1.4.16
./configure –with-nagios-user=nagios–with-nagios-group=nagios --enable-perl-module
make&& make install

4.安装nrpe

tar zxvf nrpe-2.12.tar.gz
cd nrpe-2.12.tar.gz
./configure
make all
make install-plugin
make install-daemon
make install-daemon-config

启动nagios之前先检查一下配置文件nagios.cfg

/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

启动nagios：

/usr/local/nagios/bin/nagios-d /usr/local/nagios/etc/nagios.cfg

二．Nagios客户端安装

后面编译的软件有perl程序，这里要提前设置一下环境变量
echo'export LC_ALL=C'>> /etc/profile
tail-1 /etc/profile
source/etc/profile

开始时间同步服务

echo '#time sync by darren at 2016-2-1'>>/var/spool/cron/root
echo'*/10 * * * * /usr/sbin/ntpdate pool.ntp.org >/dev/null2>&1'>>/var/spool/cron/root

查看配置文件

crontab-l
*/10 * * * * /usr/sbin/ntpdatepool.ntp.org >/dev/null 2>&1
/usr/sbin/ntpdatepool.ntp.org

添加nagios客户端用户

groupaddnagios
/usr/sbin/addusernagios -M -s /sbin/nologin

1.安装nagios-plugins

tar zxvf nagios-plugins-1.4.16.tar.gz
cd nagios-plugins-1.4.16
./configure\
--with-nagios-user=nagios--with-nagios-group=nagios --enable-perl-modules
make && make install

检查安装:

ls /usr/local/nagios/libexec/ | wc -l

2.安装nrpe

tar-zxvf nrpe-2.15.tar.gz
cdnrpe-2.15
./configure
makeall
makeinstall-plugin
makeinstall-daemon
make install-daemon-config

3.安装其他相关插件【iostat】

tar -zxvf  Params-Validate-0.91.tar.gz
cd Params-Validate-0.91
perl Makefile.PL
make
make install
cd ..

tar -zxvf Class-Accessor-0.31.tar.gz
cd Class-Accessor-0.31
perl Makefile.PL
make
make install
cd ..

tar zxvf Config-Tiny-2.12.tar.gz
cd Config-Tiny-2.12
perl Makefile.PL
make
make install
cd ..

tar zxvf Math-Calc-Units-1.07.tar.gz
cd Math-Calc-Units-1.07
perl Makefile.PL
make
make install
cd ..

tar zxvf Regexp-Common-2010010201.tar.gz
cd Regexp-Common-2010010201
perl Makefile.PL
make
make install
cd ..

tar zxvf Nagios-Plugin-0.34.tar.gz
cd Nagios-Plugin-0.34
perl Makefile.PL
make
make install
cd ..

---------------Dear,我是分隔符-----------------
#for monitor iostat

yum install sysstat -y

这个命令是安装系统性能分析工具，监控系统性能时程序或脚本会调用这些工具。
sar是监控物理组件的关键

*配置开发的几个脚本插件

cp /check_memory.pl或iostat.pl /usr/local/nagios/libexec
check_memory和check_iostat授权为755
yum install dos2unix -y
dos2unix/usr/local/nagios/libexec/check_memory.pl
dos2unix/usr/local/nagios/libexec/check_iostat

配置nrpe客户端允许监控的主机ip：

vim /usr/local/nagios/etc/nrpe.cfg  +79文件，在参数allowed_hosts后添加监控机ip（多个ip以逗号分隔。

allowed_hosts=127.0.0.1,10.1.1.19

配置nrpe监控项目：

vim /usr/local/nagios/etc/nrpe.cfg
command[check_load]=/usr/local/nagios/libexec/check_load-w 15,10,5 -c 30,25,20
command[check_mem]=/usr/local/nagios/libexec/check_memory.pl-w 10% -c 3%
command[check_disk]=/usr/local/nagios/libexec/check_disk-w 7% -p /
command[check_swap]=/usr/local/nagios/libexec/check_swap-w 20% -c 10%
command[check_iostat]=/usr/local/nagios/libexec/check_iostat-w 6 -c 10

启动nrpe守护进程：

/usr/local/nagios/bin/nrpe-c /usr/local/nagios/etc/nrpe.cfg –d
将以上命令加入到 /etc/rc.local设置开机启动。
echo‘/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg –d’ >>/etc/rc.local
nrpe默认端口号是5666
netstat –lnt | grep 5666

测试nrpe

/usr/local/nagios/libexec/check_nrpe -H 127.0.0.1
NRPEv2.15

正常返回版本信息说明服务正常。

三、配置服务端文件

1. 修改主配置文件nagios.cfg

vi /usr/local/nagios/etc/nagios.cfg
cfg_file=/usr/local/nagios/etc/objects/commands.cfg
cfg_file=/usr/local/nagios/etc/objects/contacts.cfg
cfg_file=/usr/local/nagios/etc/objects/timeperiods.cfg
cfg_file=/usr/local/nagios/etc/objects/templates.cfg
cfg_file=/usr/local/nagios/etc/objects/hosts.cfg
cfg_file=/usr/local/nagios/etc/objects/services.cfg
chown –R nagios.nagios /usr/local/nagios/etc/

2.修改hosts.cfg配置文件

#vi /usr/local/nagios/etc/object/hosts.cfg

define host{
use                    linux-server
host_name               LAMP
alias                   LAMP
address                 10.1.1.13
}
define host{
use                    linux-server
host_name               LNMP
alias                   LNMP

address                 10.1.1.16
}

define hostgroup{
hostgroup_name  hostgroup
alias           hostgroupalias
members         LAMP,LNMP
}

##################################################

3.修改services.cfg配置文件：

vi/usr/local/Nagios/etc/object/services.cfg

define service{
use     generic-service        host_name        LAMP,LNMP        service_description    check_load        check_command       check_nrpe!check_load        max_check_attempts     2        normal_check_interval  4
retry_check_interval    4
check_period         24x7
notification_interval   360
notification_period      24x7

contact_groups        admins
process_perf_data     1
}

define service{
use                  generic-service        host_name        LAMP,LNMP        service_description    check_disk        check_command       check_nrpe!check_disk
max_check_attempts     2        normal_check_interval  4
retry_check_interval    4
check_period         24x7
notification_interval   360
notification_period      24x7

contact_groups        admins
process_perf_data     1

}

define service{
use                  generic-service        host_name        LAMP,LNMP        service_description    check_disk        check_command       check_nrpe!check_local_swap
max_check_attempts     2        normal_check_interval  4
retry_check_interval    4
check_period         24x7
notification_interval   360
notification_period      24x7
contact_groups        admins
process_perf_data     1

}

define service{
use                  generic-service        host_name        LAMP,LNMP        service_description    check_http        check_command       check_nrpe!check_http
max_check_attempts     2        normal_check_interval  4
retry_check_interval    4
check_period         24x7
notification_interval   360
notification_period      24x7
contact_groups        admins
process_perf_data     1

}

define service{
use                  generic-service        host_name        LAMP,LNMP        service_description    check_mysql        check_command       check_nrpe!check_mysql
max_check_attempts     2        normal_check_interval  4
retry_check_interval    4
check_period         24x7
notification_interval   360
notification_period      24x7
contact_groups        admins
process_perf_data     1

}

#############################################################

排错：nagios服务端services.cfg配置文件的check_nrpe!check_disk等于
/usr/localnagios/libexec/check_nrpe–H 10.1.1.13 –c check_disk
可以用来测试客户端的nrpe文件

###############################################################

Nagios services.cfg扩展：

启用cfg_dir=/usr/local/nagios/etc/servers
vi /usr/local/nagios/etc/nagios.cfg
添加下面一行：
cfg_dir=/usr/local/nagios/etc/servers
清空cfg_file=/usr/local/nagios/etc/objects/services.cfg
>/usr/local/nagios/etc/objects/services.cfg

在/usr/local/nagios/etc/servers添加每台主机。
vi /usr/local/nagios/etc/servers/10.1.1.13.cfg

######################################################

define service{
use                   generic-service
host_name                       LAMP
service_description             check_disk
check_command                   check_nrpe!check_disk
}
######################################################
define service{
use                   generic-service
host_name                       LAMP
service_description            check_swap
check_command                   check_nrpe!check_swap
}

#####################################################

vi /usr/local/nagios/etc/services/10.1.1.14.cfg
######################################################

define service{
use                  generic-service
host_name                       LNMP
service_description            check_disk
check_command                  check_nrpe!check_disk
}
######################################################
define service{
use                  generic-service
host_name                       LNMP
service_description             check_swap
check_command                  check_nrpe!check_swap
}

#####################################################

四、主动监控
监控端口：
测试：

cd /usr/local/nagios/libexec/
./check_tcp –H 10.1.1.13 –p22

修改配置文件：

cd /usr/local/nagios/etc/objects
vi services.cfg

#####################################################

defineservice{
use                  generic-service
host_name                       LAMP
service_description             www_80
check_command                  check_tcp!80
max_check_attempts         2    normal_check_interval             4
retry_check_interval        4
check_period            24x7
notification_interval             360
notification_period        24x7
contact_groups        admins
process_perf_data     1
}

####################################################

defineservice{
use                  generic-service
host_name                       LAMP
service_description             mysql_3306
check_command                  check_tcp!3306
max_check_attempts         2    normal_check_interval             4
retry_check_interval        4
check_period            24x7
notification_interval             360
notification_period         24x7
contact_groups          admins
process_perf_data        1
}

###############################################

监控url地址：
测试：

./libexec/check_http -Hwww.baidu.com -C 30,14

修改配置文件：

cd /usr/local/nagios/etc/objects
vi services.cfg

#####################################################

defineservice{
use                  generic-service
host_name                       LAMP
service_description             www.darrenwang.com

#############---监控普通域名—www.darren.com---#####################

check_command                  check_http

#######---监控特殊域名--- www.darren.com/darren.test.html--#########

#check_command    check_http! -H   -u /darren/test.html

####--监控特殊域名---www.darren.com/darren/index.php/@%2e/j4*&----#########

#check_command    check_http!-H   -u“darren/index.php/@%2e/j4”

#带特殊字符的需要用双引号

max_check_attempts         2    normal_check_interval             4
retry_check_interval        4
check_period             24x7
notification_interval             360
notification_period         24x7
contact_groups          admins
process_perf_data        1
}

####################################################
模板的作用：监控不同主机同一服务