CentOS 6.5+Nagios4.0.2+Msmtp+Mutt邮箱报警

环境：

Nagios Server Nagios 6.5

IP：192.168.0.58

Nagios Clint Nagios 6.5

IP：192.168.0.83

另注意：

Nagios需要PHP支持，安装Apache+PHP步骤略....

------------------------------------------------------

——安装Nagios

1）下载Nagios

[root@Nagios ~]# cd /Linux
[root@Nagios Linux]#  http://jaist.dl.sourceforge.net/project/nagios/nagios-4.x/nagios-4.0.2/nagios-4.0.2.tar.gz

2）编译安装

[root@Nagios Linux]# tar fzvx nagios-4.0.2.tar.gz
[root@Nagios Linux]# cd nagios-4.0.2
[root@Nagios nagios-4.0.2]# useradd -M -s /sbin/nologin nagios
[root@Nagios nagios-4.0.2]# mkdir /usr/local/nagios
[root@Nagios nagios-4.0.2]# chown -R nagios:nagios /usr/local/nagios/
[root@Nagios nagios-4.0.2]# ./configure --prefix=/usr/local/nagios/
[root@Nagios nagios-4.0.2]# make all
[root@Nagios nagios-4.0.2]# make install
[root@Nagios nagios-4.0.2]# make install-init
[root@Nagios nagios-4.0.2]# make install-commandmode
[root@Nagios nagios-4.0.2]# make install-config
[root@Nagios nagios-4.0.2]# chkconfig --add nagios
[root@Nagios nagios-4.0.2]# chkconfig --level 35 nagios on
[root@Nagios nagios-4.0.2]# chkconfig --list nagios
nagios          0:关闭  1:关闭  2:关闭  3:启用  4:关闭  5:启用  6:关闭
[root@Nagios nagios-4.0.2]# service nagios restart

3）服务端安装Nagios插件plugins

[root@Nagios Linux]# tar zfvx nagios-plugins-1.5.tar.gz
[root@Nagios Linux]# cd nagios-plugins-1.5
[root@Nagios nagios-plugins-1.5]# ./configure --prefix=/usr/local/nagios/
[root@Nagios nagios-plugins-1.5]# make && make install

----------------------------------------------------------------------------

4）服务端安装nrpe

[root@Nagios Linux]# tar zfvx nrpe-2.15.tar.gz
[root@Nagios Linux]# cd nrpe-2.15
[root@Nagios nrpe-2.15]# ./configure
[root@Nagios nrpe-2.15]# make all
[root@Nagios nrpe-2.15]# make install-plugin

——Apache配置修改

1）使apache支持nagios

[root@Nagios nagios-plugins-1.5]# vi /usr/local/apache-2.4/conf/httpd.conf
ScriptAlias /nagios/cgi-bin "/usr/local/nagios/sbin"
<Directory "/usr/local/nagios/sbin">AuthType BasicOptions ExecCGIAllowOverride NoneOrder allow,denyAllow from allAuthName "Nagios Access"AuthUserFile /usr/local/nagios/etc/htpasswdRequire valid-user
</Directory>
Alias /nagios "/usr/local/nagios/share"
<Directory "/usr/local/nagios/share">AuthType BasicOptions NoneAllowOverride NoneOrder allow,denyAllow from allAuthName "nagios Access"AuthUserFile /usr/local/nagios/etc/htpasswdRequire valid-user
</Directory>

2）添加nagios登陆用户

[root@Nagios nagios-plugins-1.5]# /usr/local/apache-2.4/bin/htpasswd -c  /usr/local/nagios/etc/htpasswd nagios
New password:
Re-type new password:
Adding password for user nagios

3）修改apache的用户和用户组

[root@Nagios nagios-plugins-1.5]# vi /usr/local/apache-2.4/conf/httpd.conf
User nagios
Group nagios

--------------------------------------------------------------------------

4）解决Nagios乱码问题

[root@Nagios nagios-plugins-1.5]# vi /usr/local/apache-2.4/conf/httpd.conf
LoadModule cgid_module modules/mod_cgid.so
LoadModule actions_module modules/mod_actions.so
[root@Nagios nagios-plugins-1.5]# service httpd restart

5）测试访问

——客户端配置

1）客户端安装nagios-plugins

[root@CentOS ~]# cd /Linux
[root@CentOS Linux]# useradd -M -s /sbin/nologin nagios
[root@CentOS Linux]# tar zfvx nagios-plugins-1.5.tar.gz
[root@CentOS Linux]# cd nagios-plugins-1.5
[root@CentOS nagios-plugins-1.5]# ./configure --prefix=/usr/local/nagios/
[root@CentOS nagios-plugins-1.5]# make && make install

2）客户端安装nrpe

[root@CentOS nagios-plugins-1.5]# cd ..
[root@CentOS Linux]# tar zfvx nrpe-2.15.tar.gz
[root@CentOS Linux]# cd nrpe-2.15
[root@CentOS nrpe-2.15]# ./configure
[root@CentOS nrpe-2.15]# make all
[root@CentOS nrpe-2.15]# make install-plugin
[root@CentOS nrpe-2.15]# make install-daemon
[root@CentOS nrpe-2.15]# make install-daemon-config
[root@CentOS nrpe-2.15]# vi /usr/local/nagios/etc/nrpe.cfg
allowed_hosts=127.0.0.1,192.168.0.58

3）启动nrpe

[root@CentOS nrpe-2.15]# /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
[root@CentOS nrpe-2.15]# echo "/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d" /etc/rc.local

4）检查是否启动

[root@CentOS nrpe-2.15]# netstat -antup |grep 5666
tcp        0      0 0.0.0.0:5666                0.0.0.0:*                   LISTEN      48456/nrpe
tcp        0      0 :::5666                     :::*                        LISTEN      48456/nrpe

5）在服务端检查 [如果返回NRPE版本及成功，相反则检查配置]

[root@Nagios ~]# /usr/local/nagios/libexec/check_nrpe -H 192.168.0.83
NRPE v2.15

=========================================================================================

——配置nagios

[root@Nagios nrpe-2.15]# cd /usr/local/nagios/etc/

1）编辑nagios.cfg

[root@Nagios etc]# vi nagios.cfg
注释下面的内容
#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/localhost.cfg
#cfg_file=/usr/local/nagios/etc/objects/windows.cfg
#cfg_file=/usr/local/nagios/etc/objects/switch.cfg
#添加监控主机目录
cfg_dir=/usr/local/nagios/etc/objects/hosts
#添加模板目录
cfg_dir=/usr/local/nagios/etc/objects/templates

2）创建相关目录

[root@Nagios etc]# mdkir  objects/templates
[root@Nagios etc]# mdkir  objects/hosts

3）复制所需文件

[root@Nagios etc]# cp objects/commands.cfg objects/templates/
[root@Nagios etc]# cp objects/timeperiods.cfg objects/templates/

4）创建自定义模板

[root@Nagios etc]# vi objects/templates/templates.cfg
#联系人模板
define contact{#联系人名称name                            tao#当服务出现异常时 发送通知的时间段service_notification_period     24x7#当主机出现异常时 发送通知的时间段host_notification_period        24x7#w 表示警告 u 表示不明 c 表示紧急 r 表示恢复service_notification_options    w,u,c,r#d 表示宕机 u 表示不可达 r 表示重新恢复host_notification_options       d,u,r#服务故障时 发送通知的方式[邮件]service_notification_commands   notify-service-by-email#主机故障时 发送通知的方式[邮件]host_notification_commands      notify-host-by-emailregister                        0}
#主机模板
define host{#定义主机名name                            linux-host#其值为1 Nagios将收集的数据写入某个文件中 以备提取process_perf_data               1passive_checks_enabled          0#主机与服务的刷新检测 0为关闭check_freshness                 0#事件处理开启event_handler_enabled           1#打开抖动感知flap_detection_enabled          1active_checks_enabled           1#发送通知的时间段notification_period             24x7#检查主机的时间段check_period                    24x7#对主机的检查时间间隔/分钟check_interval                  5#如果宕机重试检查时间/分钟retry_interval                  1#宕机后对主机的最大检查次数max_check_attempts                  2#检查主机状态指令[在commands.cfg中定义]check_command                   check-host-alive#在主机出现异常后 故障一直没有解决 再次发送通知的时间/分钟notification_interval           5#d 表示宕机 u 表示不可达 r 表示重新恢复notification_options            d,u,r#1为开启报警信息notifications_enabled           0#指定联系人组[在contacts.cfg中定义]contact_groups                  admins#处理性能数据#一天刷新检测一次，以防止检测结果不是实时的freshness_threshold             86400#0为不注册，意思是这个作为模板register                        0}
#服务模板
define service{#定义一个服务名称name                            linux-service#启用主动服务检查active_checks_enabled           1#启用被动服务检查passive_checks_enabled          0#主机与服务的刷新检测check_freshness                 0#开启报警信息notifications_enabled           1#重新发送报警信息的间隔notification_interval           5#事件处理开启event_handler_enabled           1#启用抖动感知flap_detection_enabled          1#处理性能数据process_perf_data               1#发送通知的时间段notification_period             24x7#检查时间段check_period                    24x7#如果宕机最大检查次数max_check_attempts              5#检查服务时间间隔/分钟normal_check_interval           1#如果宕机再次检查的间隔时间/分钟retry_check_interval            1#一天刷新检测一次，以防止检测结果不是实时的freshness_threshold             86400#0为不注册，意思是这个作为模板register                        0}
define service  {name                                    test#1为开启报警信息notifications_enabled                   0#重新发送报警信息的间隔notification_interval                   5notification_options                    w,u,c,#事件处理开启event_handler_enabled                   1#打开抖动感知flap_detection_enabled                  1#发送通知的时间段notification_period                     24x7#检查时间段check_period                            24x7#每一次检测的间隔时间check_interval                          1#如果宕机再次检查的间隔时间retry_interval                          1#检测次数,如果2次都是宕机的话 就报警max_check_attempts                      2active_checks_enabled                   1passive_checks_enabled                  0#处理性能数据process_perf_data                       1#主机与服务的刷新检测 0为关闭check_freshness                         0#一天刷新检测一次，以防止检测结果不是实时的freshness_threshold                     86400#0为不注册，意思是这个作为模板register                                0}
[root@Nagios etc]# vi objects/templates/contacts.cfg
#联系人
define contact{#用户名称contact_name                    nagios#引用模板use                             tao#别名alias                           Nagios Admin#发送邮箱email                           xxxxxxxx@qq.com}
#联系人组
define contactgroup{#组名称contactgroup_name       admins#组别名alias                   Nagios Administrators#组用户成员members                 nagios}

5）添加监控主机

最好使用被监控机IP为名称、比如:被监控服务器为192.168.0.83 [后期服务器多的时候、容易维护]

这里为了省事、一台服务器监控多种服务。大家测试的时候、可以添加多个服务器监控不同服务。

[root@Nagios etc]# vi objects/hosts/192.168.0.83.cfg
#监控主机
define host {host_name                           192.168.0.83address                             192.168.0.83use                                 linux-host
}
#监控SSH
define service  {service_description                 check_sshcheck_command                       check_ssh!-p 22host_name                           192.168.0.83use                                 linux-serviceregister                            1
}
#监控登陆用户
define service  {service_description                 check_userscheck_command                       check_nrpe!check_usershost_name                           192.168.0.83use                                 linux-serviceregister                            1
}
#监控mysql [需要在被监控配置、下面有配置说明]
define service  {service_description                 check_mysqlcheck_command                       check_mysqlhost_name                           192.168.0.83use                                 linux-serviceregister                            1
}
#监控交换空间
define service  {service_description                 check_swapcheck_command                       check_nrpe!check_swaphost_name                           192.168.0.83use                                 linux-serviceregister                            1
}
#监控磁盘
define service  {service_description                 check_diskcheck_command                       check_nrpe!check_diskhost_name                           192.168.0.83use                                 linux-serviceregister                            1
}
#监控HTTP
define service  {service_description                 check_httpcheck_command                       check_http!-p 80host_name                           192.168.0.83use                                 linux-serviceregister                            1
}
#监控负载
define service  {service_description                 check_loadcheck_command                       check_nrpe!check_loadhost_name                           192.168.0.83use                                 linux-serviceregister
}

6）重启启动nagios、登陆WEB查看

网上很多人说配置后，执行命令检查是否有错误。个人感觉完全没必要、因为启动的时候Nagios默认会自动检查配置、如果有错误Nagios会提示。

[root@Nagios etc]# service nagios restart

——测试

1）在客户端登陆nagios

注意：监控MySQL需要在被监控端配置如下：

1）客户端连接mysql添加nagios用户

mysql> create database nagios;
Query OK, 1 row affected (0.00 sec)
mysql> grant select on nagios.* to nagios@'192.168.1.18' identified by 'nagios';
Query OK, 0 rows affected (0.11 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> quit

2）Nagios服务器端添加mysql监控

[root@Nagios nrpe-2.15]# vi /usr/local/nagios/etc/objects/templates/commands.cfg
# 'check_mysql' command definition
define command{command_name    check_mysqlcommand_line    $USER1$/check_nrpe -H $HOSTADDRESS$ -u nagios -d nagios -p nagios}

——安装msmtp

1）下载安装msmtp

[root@Nagios Linux]# wget http://jaist.dl.sourceforge.net/project/msmtp/msmtp/1.4.31/msmtp-1.4.31.tar.bz2
[root@Nagios Linux]# tar fvx msmtp-1.4.31.tar.bz2
[root@Nagios Linux]# cd msmtp-1.4.31
[root@Nagios msmtp-1.4.31]# ./configure --prefix=/usr/local/msmtp
[root@Nagios msmtp-1.4.31]# make && make install
[root@Nagios msmtp-1.4.31]# cd /usr/local/msmtp/

2）配置msmtp

[root@Nagios msmtp]# mkdir etc
[root@Nagios msmtp]# cd etc/
[root@Nagios etc]# vi msmtprc
account default
logfile /usr/local/msmtp/msmtp.log
host smtp.163.com
from xxxxxx@163.com
auth login
user xxxxxx@163.com
#邮箱密码
password xxxxxx

3）安装mutt

[root@Nagios etc]# yum install mutt -y

4）配置mutt

[root@Nagios etc]# vi /etc/Muttrc
set sendmail="/usr/local/msmtp/bin/msmtp"
set use_from=yes
set realname="YingTao"
set from=hypocriticals@163.com
set envelope_from=yes
set editor="vim"
set record="/usr/local/msmtp/etc/sent"

5）Nagios默认使用sendmail发送邮件、只需要把 /bin/mail 改为 /usr/bin/mutt即可。

[root@Nagios etc]# vi objects/templates/commands.cfg
# 'notify-host-by-email' command definition
define command{command_name    notify-host-by-emailcommand_line    /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n" | /usr/bin/mutt -s "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" $CONTACTEMAIL$}
# 'notify-service-by-email' command definition
define command{command_name    notify-service-by-emailcommand_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$SERVICEOUTPUT$\n" | /usr/bin/mutt -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$}

——测试能否通过邮箱报警

1）在被监控端关闭mysql

[root@CentOS ~]# /etc/init.d/mysqld stop
Shutting down MySQL. SUCCESS!
[root@CentOS ~]# netstat -antup |grep 3306

2）登陆WEB Nagios查看MySQL状态

3）在服务端查看日志 [默认日志路径为/usr/local/nagios/var/]

[root@Nagios ~]# cd /usr/local/nagios/var/
[root@Nagios var]# tail -f nagios.log
#检查五次、如果五次服务还是无法检测到服务是正常的，则发邮件通知。
[1388002399] SERVICE ALERT: 192.168.0.83;check_mysql;CRITICAL;SOFT;1;Can't connect to MySQL server on '192.168.0.83' (111)
[1388002459] SERVICE ALERT: 192.168.0.83;check_mysql;CRITICAL;SOFT;2;Can't connect to MySQL server on '192.168.0.83' (111)
[1388002519] SERVICE ALERT: 192.168.0.83;check_mysql;CRITICAL;SOFT;3;Can't connect to MySQL server on '192.168.0.83' (111)
[1388002579] SERVICE ALERT: 192.168.0.83;check_mysql;CRITICAL;SOFT;4;Can't connect to MySQL server on '192.168.0.83' (111)
[1388002639] SERVICE ALERT: 192.168.0.83;check_mysql;CRITICAL;HARD;5;Can't connect to MySQL server on '192.168.0.83' (111)
[1388002639] SERVICE NOTIFICATION: nagios;192.168.0.83;check_mysql;CRITICAL;notify-service-by-email;Can't connect to MySQL server on '192.168.0.83' (111)

4）登陆邮箱查看是否收到邮件 [由于是虚拟机时间没有调整、和现实时间有差别]

5）重新启动MySQL

[root@CentOS ~]# /etc/init.d/mysqld start
Starting MySQL.. SUCCESS!
[root@CentOS ~]# netstat -antup |grep 3306
tcp        0      0 0.0.0.0:3306           0.0.0.0:*            LISTEN       51040/mysqld

6）检测服务恢复正常后，是否收到邮件通知

转载于:https://blog.51cto.com/hypocritical/1352319

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