【移动应用开发技术】Nagios监控系统安装和配置

【移动应用开发技术】Nagios监控系统安装和配置

Nagios是一款企业级开源免费的监控工具，其关注点在于保证服务的正常运行，并且在服务发生问题时提供报警机制。Nagios服务端：33Nagios监控端：web1(.235)

、

web2(36)1)

安装nagios依赖软件包通过yum方式快速安装Nagios所需的依赖软件包yum

-y

install

gd

gd-devel

openssl

openssl-devel

httpd

php

gcc

glibc

glibc-common

make

net-snmp

wget2)

创建nagios账户与组配置时使用--with-nagios-user和--with-nagios-group指定以该账号的身份运行Nagios。useradd

nagios3)

×××地址Nagios:/project/nagios/nagios-4.x/nagios-4.2.1/nagios-4.2.1.tar.gzNagios-plugin:/download/nagios-plugins-2.1.2.tar.gzNrpe:/project/nagios/nrpe-3.x/nrpe-3.0.1.tar.gz4)

Nagios的安装tar

-zxf

nagios-4.2.1.tar.gz

-C

/usr/local

cd

/usr/local

cd

nagios-4.2.1/

./configure

--with-nagios-user=nagios

--with-nagios-group=nagios

make

all

make

install

#安装主程序，CGI以及HTML文件

make

install-init

#安装启动脚本/etc/init.d/nagios

make

install-commandmode

#安装与配置目录权限

make

install-config

#安装配置文件模板

#

由于nagios最终将以web的形式进行管理与监控，安装过程中使用make

install-webconf命令将生成Apache附加配置文件/etc/httpd/conf.d/nagios.conf

make

install-webconf5)

Nagios插件安装tar

-zxf

nagios-plugins-2.1.2.tar.gz

-C

/usr/local

cd

/usr/local/nagios-plugins-2.1.2/

./configure

--prefix=/usr/local/nagios

make

make

install

tar

-zxf

nrpe-3.0.1.tar.gz

-C

/usr/local/

cd

/usr/local

cd

nrpe-3.0.1/

./configure

--prefix=/usr/local/nagios

make

all

make

install-plugin

make

install-daemon

make

install-daemon-config

chown

nagios:nagios

-R

/usr/local/nagios6)

禁用selinux并关闭防火墙setenforce

0

service

iptables

stop7)

创建web访问账户htpasswd

-c

/usr/local/etc/htpasswd.users

tomcat8)

启动nagios/etc/init.d/httpd

start

/etc/init.d/nagios

start9)

修改nagios配置文件主配置文件：nagios.cfg主配置文件中使用cfg_file配置项加载其他配置文件，为了方便管理，将两台监控主机创建不同的配置文件，35配置文件名为web1.cfg，36配置文件名为web2.cfgvi

/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

#

Definitions

for

monitoring

the

local

(Linux)

host

cfg_file=/usr/local/nagios/etc/objects/localhost.cfg

#下面两个配置文件需要手动创建出来，用于监控两台web服务器

cfg_file=/usr/local/nagios/etc/web1.cfg

cfg_file=/usr/local/nagios/etc/web2.cfg

……修改CGI配置文件(cgi.cfg)，需要将访问web页面的账号加入进来vi

/usr/local/nagios/etc/cgi.cfg

use_authentication=1

authorized_for_system_information=nagiosadmin,tomcat

authorized_for_configuration_information=nagiosadmin,tomcat

authorized_for_system_commands=nagiosadmin,tomcat

authorized_for_all_services=nagiosadmin,tomcat

authorized_for_all_hosts=nagiosadmin,tomcat

authorized_for_all_service_commands=nagiosadmin,tomcat

authorized_for_all_host_commands=nagiosadmin,tomcat

……修改命令配置文件（commands.cfg），该文件定义具体的命令实现方式，如发送报警邮件具体使用什么工具、邮件内容格式定义。vi

/usr/local/nagios/etc/objects/commands.cfg

……

define

command{

command_name

check-host-alive

command_line

$USER1$/check_ping

-H

$HOSTADDRESS$

-w

3000.0,80%

-c

5000.0,100%

-p

5

}

……

#以下内容需要手动添加，用于进行远程主机监控，需要安装nrpe软件包

define

command{

command_name

check_nrpe

command_line

$USER1$/check_nrpe

-H

$HOSTADDRESS$

-c

$ARG1$

}

修改nrpe配置文件（nrpe.cfg），用于监控远程主机所需要的命令vi

/usr/local/nagios/etc/nrpe.cfg

command[check_users]=/usr/local/nagios/libexec/check_users

-w

5

-c

10

command[check_load]=/usr/local/nagios/libexec/check_load

-w

15,10,5

-c

30,25,20

command[check_hda1]=/usr/local/nagios/libexec/check_disk

-w

20%

-c

10%

-p

/dev/hda1

command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs

-w

5

-c

10

-s

Z

command[check_total_procs]=/usr/local/nagios/libexec/check_procs

-w

150

-c

200

#下面一行为手动添加

command[check_disk]=/usr/local/nagios/libexec/check_disk

-w

20%

-c

10%

……修改监控主机配置文件(localhost.cfg)，该文件用于设置如何监控本机服务器资源。vi

/usr/local/nagios/etc/objects/localhost.cfg

……

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

localhost

alias

localhost

address

}

……

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

}

……

创建远程监控配置文件web1.cfg与web2.cfg，用于监控远程服务器系统资源与服务，可以使用localhost.cfg作为参考模板。下面列出web1.cfg的所有内容，web2.cfg

只需要参考web1.cfg的内容修改主机名称、IP地址以及主机名称即可。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

web1

alias

address

35

}

define

hostgroup{

hostgroup_name

webs

;

The

name

of

the

hostgroup

alias

Linux

Servers

;

Long

name

of

the

group

members

web1

;

Comma

separated

list

of

hosts

that

belong

to

this

group

}

define

service{

use

generic-service

;

Name

of

service

template

to

use

host_name

web1

service_description

PING

check_command

check_ping!100.0,20%!500.0,60%

notifications_enabled

1

}

define

service{

use

generic-service

;

Name

of

service

template

to

use

host_name

web1

service_description

Sys_Load

check_command

check_nrpe!check_load

notifications_enabled

1

}

define

service{

use

generic-service

;

Name

of

service

template

to

use

host_name

web1

service_description

Current

Users

check_command

check_nrpe!check_users

notifications_enabled

1

}

define

service{

use

generic-service

;

Name

of

service

template

to

use

host_name

web1

service_description

Total

Processes

check_command

check_nrpe!check_total_procs

notifications_enabled

1

}

define

service{

use

generic-service

;

Name

of

service

template

to

use

host_name

web1

service_description

SSH

check_command

check_ssh

notifications_enabled

1

}

define

service{

use

generic-service

;

Name

of

service

template

to

use

host_name

web1

service_description

HTTP

check_command

check_http

notifications_enabled

1

}10)

重新加载nagios配置其他配置文件不需修改，可以直接使用，重启nagios，重新加载所有的配置/etc/init.d/nagios

restart下面以web1为例，web2与web1操作一致1)

yum安装nagios插件需依赖的软件包yum

-y

install

openssl

openssl-devel2)

创建nagios用户和组useradd

-s

/sbin/nologin

nagios3)

安装Nagios-plugintar

-zxf

nagios-plugins-2.1.2.tar.gz

-C

/usr/local

cd

/usr/local/

cd

nagios-plugins-2.1.2/

./configure

make

make

install4)

安装Nrpetar

-zxf

nrpe-3.0.1.tar.gz

-C

/usr/local

cd

/usr/local/nrpe-3.0.1/

./configure

make

all

make

install-plugin

make

install-daemon

make

isntall-daemon-config

chown

-R

nagios:nagios

/usr/local/nagios

5)

修改nrpe配置文件cp

/usr/local/nrpe-3.0.1/sample-config/nrpe.cfg

/usr/local/nagios/etc/

vi

/usr/local/nagios/etc/nrpe.cfg

……

allowed_hosts=,33

……

command[check_users]=/usr/local/nagios/libexec/check_users

-w

5

-c

10

command[check_load]=/usr/local/nagios/libexec/check_load

-w

15,10,5

-c

30,25,20

com