nagios之安装配置

monicazhang

来自：网络

上线的服务器有时会被人攻击，导致服务不可用，今天安装配置了nagios对上线服务器进行监控，简单记录一下 nagios安装
[ ttp://my.oschina.net/jeremyxu2010/blog/281151#]?[/url]

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#安装必要的软件包 yum install -y gcc glibc glibc-common gd gd-devel xinetd openssl-devel #创建nagios用户及授予目录权限
useradd -s /sbin/nologin nagios mkdir /usr/local/nagios chown -R nagios.nagios /usr/local/nagios #安装nagios
tar xf nagios-4.0.7.tar.gz cd nagios-4.0.7
./configure --prefix=/usr/local/nagios make all make install && make install-init && make install-commandmode && make install-config
chkconfig --add nagios && chkconfig --level 35 nagios on && chkconfig --list nagios #安装nagios-plugins
tar xf nagios-plugins-2.0.2.tar.gz cd nagios-plugins-2.0.2
./configure --prefix=/usr/local/nagios make && make install #安装apache
tar xf httpd-2.2.23.tar.gz cd httpd-2.2.23
./configure --prefix=/usr/local/apache2 make && make install #安装php
tar xf php-5.5.13.tar.gz cd php-5.5.13
./configure --prefix=/usr/local/php --with-apxs2=/usr/local/apache2/bin/apxs make && make install

接下来配置apache
[ ttp://my.oschina.net/jeremyxu2010/blog/281151#]?[/url]

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#生成nagios密码文件
/usr/local/apache2/bin/htpasswd -c /usr/local/nagios/etc/htpasswd admin
vim /usr/local/apache2/conf/httpd.conf
...
User nagios
Group nagios
...
<IfModule dir_module>
DirectoryIndex index.html index.php
</IfModule>
...
AddType application/x-httpd-php .php
... #setting for nagios  ScriptAlias /nagios/cgi-bin "/usr/local/nagios/sbin"           开源监控软件

<Directory "/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          //用于此目录访问身份验证的文件
   Require valid-user
</Directory> Alias /nagios "/usr/local/nagios/share"
<Directory "/usr/local/nagios/share">
   AuthType Basic
   Options None
   AllowOverride None
   Order allow,deny
   Allow from all
   AuthName "nagios Access"
   AuthUserFile /usr/local/nagios/etc/htpasswd
   Require valid-user
</Directory>
#启动apache vim /etc/init.d/httpd #!/bin/sh
#
# Startup script for the Apache Web Server
#
# chkconfig: 345 85 15
# description: Apache is a World Wide Web server.  It is used to serve \          nagios配置

# HTML files and CGI.
# processname: httpd
# pidfile: /usr/local/apache2/logs/httpd.pid
# config: /usr/local/apache2/conf/httpd.conf # Source function library. . /etc/rc.d/init.d/functions
# See how we were called.
case "$1" in
start) echo -n "Starting httpd: "
daemon /usr/local/apache2/bin/httpd -DSSL echo touch /var/lock/subsys/httpd
;;
stop) echo -n "Shutting down http: "
killproc httpd echo rm -f /var/lock/subsys/httpd rm -f /usr/local/apache2/logs/httpd.pid
;;
status)
status httpd
;;
restart)
$0 stop
$0 start
;;
reload) echo -n "Reloading httpd: "
killproc httpd -HUP echo
;;
*) echo "Usage: $0 {start|stop|restart|reload|status}" exit 1 esac
exit 0
chmod +x /etc/init.d/httpd
chkconfig httpd on /etc/init.d/httpd start

接下来配置nagios
[ ttp://my.oschina.net/jeremyxu2010/blog/281151#]?[/url]

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#确保admin用户登录后有权限查看信息 vim /usr/local/nagios/etc/cgi.cfg 监控软件

...
default_user_name=admin
authorized_for_system_information=nagiosadmin,admin
authorized_for_configuration_information=nagiosadmin,admin
authorized_for_system_commands=admin
authorized_for_all_services=nagiosadmin,admin
authorized_for_all_hosts=nagiosadmin,admin
authorized_for_all_service_commands=nagiosadmin,admin
authorized_for_all_host_commands=nagiosadmin,admin
...
#修改nagios主配置文件，将主机的定义都放在/usr/local/nagios/etc/hosts目录中
mkdir /usr/local/nagios/etc/hosts
vim /usr/local/nagios/etc/nagios.cfg
...
cfg_dir=/usr/local/nagios/etc/hosts
...
#添加一个自定义命令 vim /usr/local/nagios/etc/objects/command.cfg

... # 'check_custom_http' command definition define command{
      command_name check_custom_http
      command_line $USER1$/check_http -4 -N -H $ARG1$ -u $ARG2$
      }
# 'check_dns' command definition define command{
      command_name check_dns
      command_line $USER1$/check_dns -v -H $ARG1$ -a $ARG2$ -w $ARG3$ -c $ARG4$
      }
...
#定义主机组 vim /usr/local/nagios/etc/hosts/group.cfg

define hostgroup{
      hostgroup_name groupname1
      alias             groupname1
      members          server1 #server1必须在/etc/hosts里有对应的映射 }             nagios实施

#定义主机server1 vim /usr/local/nagios/etc/hosts/server1.cfg

define host{
      use                   linux-server
      host_name             server1
      alias                server1
      address                xx.xx.xx.xx
      notification_period    24x7
}
define service{
      use                            local-service       ; Name of service template to use
      host_name                      server1
      service_description          PING
      check_command                check_ping!100.0,20%!500.0,60% ; 延时100ms丢包率大于20%时，则发出警告通知; 延时500ms丢包率大于60%时，则发出严重错误通知
}
;需要做好本机使用的DNS设置，在/etc/resolv.conf文件中定义
define service{
      use                            local-service       ; Name of service template to use
      host_name                      server1
      service_description          DNS
      check_command                check_dns!xxx.test.com!xx.xx.xx.xx!4!10 ;连续解析域名发生4次错误，则发出警告通知；连续解析域名发生10次错误，则发出严重错误通知；
}
define service{
      use                            local-service       ; Name of service template to use
      host_name                      server1
      service_description          HTTP
      check_command                check_custom_http!xxx.abc.com!/somepath/path1  ;注意这里的参数要以!分隔
}
define service{
      use                            local-service       ; Name of service template to use
      host_name                      server1
      service_description          SSH
      check_command                check_ssh
}
#配置监控出现问题时要通知的联系人 vim /usr/local/nagios/etc/objects/contacts.cfg          nagios培训

define contact{
      contact_name                   user1             ; Short name of user
      use                            generic-contact       ; Inherit default values from generic-contact template (defined above)
      alias                         user1             ; Full name of user

      email                         user1@abc.com  ; <<***** CHANGE THIS TO YOUR EMAIL ADDRESS ******
      }

define contact{
      contact_name                   user2             ; Short name of user
      use                            generic-contact       ; Inherit default values from generic-contact template (defined above)
      alias                         user2             ; Full name of user

      email                         user2@abc.com  ; <<***** CHANGE THIS TO YOUR EMAIL ADDRESS ******
      }

define contactgroup{
      contactgroup_name    admins
      alias                Nagios Administrators
      members                user1,user2
      }

重启nagios /etc/init.d/nagios restart

刚才发现nagios监控到服务器异常也没有发邮件通知，查了一下，还需要配置mail命令可发送邮件
[ ttp://my.oschina.net/jeremyxu2010/blog/281151#]?[/url]

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yum install mail
vim /etc/mail.rc
... set from=abc-noreply@abc.com set smtp=smtp.abc.com set smtp-auth-user=abc-noreply@abc.com set smtp-auth-password=somepwd set smtp-auth=login
...

想做Nagios， Zabbix,Cacti,iTop各种交流的，可以进入开源监控工具Nagios交流 QQ群号：476809427

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少林 · 发表于 2018-6-13 16:43:32

好分享

東東 · 发表于 2020-11-26 08:18:54

谢谢分享

nagios之安装配置

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