nagios安装配置
nagios安装配置
eddy_linux 发表于2年前
nagios安装配置
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第一步:

安装软件:分为nagios监控端和nagios被监控端

监控端软件列表

Nagios安装包

Nagios插件安装包

Nagios中文支持包

Nrpe软件包

nagios通过nrpe来远端管理服务

1. nagios执行安装在它里面的check_nrpe 插件,并告诉check_nrpe 去检测哪些服务。

2. 通过ssl,check_nrpe 连接远端机子上的nrpe daemon

3. nrpe运行本地的各种插件去检测本地的服务和状态

4. nrpe把检测的结果传给主机端的check_nrpe, 主机端的check_nrpe再把结果送到nagios状态队列中。

5. nagios 依次读取队列中的信息,再把结果显示出来。

解决编译软件时需要的依赖

[root@www ~]# yum install -y gcc glibc glibc-common gd gd-devel xinetd openssl-devel

添加nagios用户

添加目录 mkdir /usr/local/nagios

修改权限 chown -R nagios.nagios /usr/local/nagios

解压软件包 tar -xzvf nagios-3.2.0.tar.gz

开始安装1.   ./configure --prefix=/usr/local/nagios

2.   make all

3.   make install

4.   make install-init

5.    make install-commandmode

6.    make install-config

7.    chkconfig --add nagios

8.    chkconfig --level 35 nagios on

9.    tar -xzvf nagios-plugins-1.4.14.tar.gz

10.   ./configure --prefix=/usr/local/nagios

11.   make && make install

12.   yum install httpd

13.   yum install php

14.   vim /etc/httpd/conf/httpd.conf

添加以下内容

修改用户

 

15.   添加密码

htpasswd -c /usr/local/nagios/etc/htpasswd oracle

 

16.   /etc/init.d/httpd start

17.   tar -xjvf nagios-cn-3.2.0.tar.bz2

18.   ./configure 

19.   make && make install

监控端nagios安装完毕

重启httpd和启动nagios

可以看到以下画面

这里你要输入刚才设置的用户和密码


在没有修改配置的情况下,默认只能查看到本机

好的 下面来添加主机

会用到以下几个文件,其他文件就由各位下去自己慢慢研究了,我手懒

其中以下两个文件需要手动创建

 

定义被监控主机

[root@www objects]# cat hosts.cfg

define host{  

        use                     linux-server     使用templates.cfg定义的 

        host_name             Nagios-Linux    自己取的名字并不一定是主机名

        alias                    Nagios-Linux    别名     

        address                 192.168.1.201  被监控主机      

        }  

定义监控内容也就是监控命令

[root@www objects]# cat services.cfg

define service{

        use                     local-service

        host_name               Nagios-Linux

        service_description     Current Load

        check_command           check_nrpe!check_load

        }

 

define service{

        use                     local-service

        host_name               Nagios-Linux

        service_description     Check Disk sda1

        check_command           check_nrpe!check_sda1

        }

 

define service{

        use                     local-service

        host_name               Nagios-Linux

        service_description     Total Processes

        check_command           check_nrpe!check_total_procs

        }

 

define service{

        use                     local-service

        host_name               Nagios-Linux

        service_description     Current Users

        check_command           check_nrpe!check_users

        }

 

define service{

        use                     local-service

        host_name               Nagios-Linux

        service_description     Check Zombie Procs

        check_command           check_nrpe!check_zombie_procs

        }

define service{

        use                     local-service

        host_name               Nagios-Linux

        service_description     Check Swap

        check_command           check_nrpe!check_swap

        }

define service{

        use                     local-service

        host_name               Nagios-Linux

        service_description     HTTP

        check_command           check_nrpe!check_http

        }

define service{

        use                     local-service

        host_name               Nagios-Linux

        service_description     MYSQL

        check_command           check_nrpe!check_mysql

        }

define service{

        use                     local-service

        host_name               Nagios-Linux

        service_description     MYLOG

        check_command           check_nrpe!check_mylog

被监控端主机安装nrep、nagi-plugin软件包

与监控端安装类似,注意最好是以xinetd的方式来启动

安装nrep

  161  ./configure

  162  make all

  163  make install-plugin

  164  make install-daemon-config

  165  make install-xinetd

 

 

 

vim /etc/xinetd.d/nrpe

 

# default: on

# description: NRPE (Nagios Remote Plugin Executor)

service nrpe

{

        flags           = REUSE

        socket_type     = stream

        port            = 5666

        wait            = no

        user            = nagios

        group           = nagios

        server          = /usr/local/nagios/bin/nrpe

        server_args     = -c /usr/local/nagios/etc/nrpe.cfg --inetd

        log_on_failure  += USERID

        disable         = no

        only_from       = 127.0.0.1 192.168.1.200#服务器地址

测试

/usr/local/nagios/libexec/check_nrpe -H localhost

[root@www libexec]# vim /usr/local/nagios/etc/nrpe.cfg

log_facility=daemon

pid_file=/var/run/nrpe.pid

server_port=5666

nrpe_user=nagios

nrpe_group=nagios

allowed_hosts=127.0.0.1

dont_blame_nrpe=0

debug=0

command_timeout=60

connection_timeout=300

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_sda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/sda1

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

command[check_swap]=/usr/local/nagios/libexec/check_swap -w 20% -c 10%

command[check_http]=/usr/local/nagios/libexec/check_http -I 127.0.0.1

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

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

自己定义的插件

[root@www libexec]# cat check_mylog

#!/bin/bash

#

#

myfiles="`date +%F`.txt"

count=`sed -n '/fail/p' /tmp/$myfiles|wc -l`

if [ $count -eq 0 ];then

       echo "MYLOG IS OK"

       exit 0

elif [ $count -ge 1 -a $count -le 10 ] ;then

       echo "MYLOG IS WARNING"

       exit 1

elif [ $count -ge 11 ];then

       echo "MYLOG IS CRITICAL"

       exit 2

elif [ $count -lt 0 ];then

       echo "UNKNOWN"

       exit 3

If

0 表示OK

1 表示WARNNING

2 表示 CRITICAL

3 表示UNKNOWN

在服务端的services.cfg中使用这两个自己定义的插件

define service{

        use                     local-service

        host_name               Nagios-Linux

        service_description     MYSQL

        check_command           check_nrpe!check_mysql

        }

define service{

        use                     local-service

        host_name               Nagios-Linux

        service_description     MYLOG

        check_command           check_nrpe!check_mylog

最后要在command.cfg中加入check_nrpe命令

# 'check_nrpe' command definition

define command{

        command_name    check_nrpe     

        command_line    $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ 

                       

        }

 

 

重启服务端服务

就会出现我们定义的主机

例如我现在关闭mysql

这里就可以看到mysql的监控状态为紧急

 

现在恢复mysql

可以看到mysql监控状态为ok

下面我来实现故障告警功能

使用邮件告警

[root@www objects]# cat contacts.cfg

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

# CONTACTS.CFG - SAMPLE CONTACT/CONTACTGROUP DEFINITIONS

#

# Last Modified: 05-31-2007

#

# NOTES: This config file provides you with some example contact and contact

#        group definitions that you can reference in host and service

#        definitions.

#      

#        You don't need to keep these definitions in a separate file from your

#        other object definitions.  This has been done just to make things

#        easier to understand.

#

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

 

 

 

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

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

#

# CONTACTS

#

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

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

 

# Just one contact defined by default - the Nagios admin (that's you)

# This contact definition inherits a lot of default values from the 'generic-contact'

# template which is defined elsewhere.

 

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,f,s

        host_notification_options        d,u,r,f,s

        service_notification_commands   notify-service-by-email                           

        host_notification_commands        notify-host-by-email 

        email                           15882026924@139.com       ;

        }

 

 

 

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

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

#

# CONTACT GROUPS

#

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

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

 

# We only have one contact in this simple configuration file, so there is

# no need to create more than one contact group.

 

define contactgroup{

        contactgroup_name       admins

        alias                   Nagios Administrators

        members                 nagiosadmin

        }

 

 

 

[root@www objects]# tail -20 services.cfg

        }

define service{

        use                     local-service

        host_name               Nagios-Linux

        service_description     HTTP

        check_command           check_nrpe!check_http

        }

define service{

        use                     local-service

        host_name               Nagios-Linux

        service_description     MYSQL

        check_command           check_nrpe!check_mysql

              contact_groups              admins

        }

define service{

        use                     local-service

        host_name               Nagios-Linux

        service_description     MYLOG

        check_command           check_nrpe!check_mylog

        }

Cat command.cfg

# 'notify-host-by-email' command definition

define command{

       command_name       notify-host-by-email

       command_line       /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n" | /bin/mail -s "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" $CONTACTEMAIL$

       }

 

# 'notify-service-by-email' command definition

define command{

       command_name       notify-service-by-email

       command_line       /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$" | /bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$

       }

默认是配置好了这里就不用配置

直接在contact和services中使用就好了

 

把mysql停了

 


验证成功,但是要注意需要把发件人的地址设置为白名单才可以收到

由于是手机邮件就实现了邮件短信同时提醒的功能,当然有邮件达到短信提醒的邮箱都能实现这个功能不一定是手机邮箱

 


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