公司的一个项目网站,上线几天就因为磁盘暴满而出了问题,由于其服务器都集中在某一IDC机房内,所以考虑部署套Nagios监控报警系统,考虑到其它项目网站可能有类似需求,所以将其安装过程整理成脚本,方便以后的工作。Nagios服务器自动安装脚本,如下所示(此脚本在Centos5.5|5.6|5.8 x86_64下通过):
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yum -y install httpd gcc gcc-c++ glibc glibc-common gd gd-devel
useradd nagios
groupadd nagcmd usermod -G nagcmd nagios
usermod -G nagcmd apache
cd /usr/local/src
wget http: //nchc .dl.sourceforge.net /sourceforge/nagios/nagios-3 .0.6. tar .gz
wget http: //nchc .dl.sourceforge.net /sourceforge/nagiosplug/nagios-plugins-1 .4.13. tar .gz
wget http: //prdownloads .sourceforge.net /sourceforge/nagios/nrpe-2 .13. tar .gz
tar zxvf nagios-3.0.6. tar .gz
cd nagios-3.0.6
. /configure --with- command -group=nagcmd --prefix= /usr/local/nagios
make all
make install
make install -init
make install -config
make install -commandmode
make install -webconf
cd ../
tar zxvf nagios-plugins-1.4.13. tar .gz
cd nagios-plugins-1.4.13
. /configure --prefix= /usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios
make && make install
cd ../
tar zxvf nrpe-2.13. tar .gz
cd nrpe-2.13
. /configure
make all
make install -plugin
make install -daemon
make install -daemon-config
htpasswd - bc /usr/local/nagios/etc/htpasswd . users nagiosadmin
nagiosadmin101 echo " alias nagioscheck=' /usr/local/nagios/bin/nagios - v
/usr/local/nagios/etc/nagios .cfg' " >> /root/ .bashrc
source /root/ .bashrc
chkconfig nagios on chkconfig httpd on service httpd start service nagios start |
#基本安装过程这里就不重复了,htpasswd -bc这行代码的作用是不需要人为干预的生成密码名为nagiosadmin101的angiosadmin用户,而后期由于经常要修改/usr/local/nagios/etc/nagios.cfg配置文件,所以需要检测其语法,所以将其长命令生成名为nagioscheck的别名命令。
Nagios客户端自动安装脚本,如下所示:
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useradd nagios
cd /usr/local/src
wget http: //nchc .dl.sourceforge.net /sourceforge/nagiosplug/nagios-plugins-1 .4.13. tar .gz
wget http: //prdownloads .sourceforge.net /sourceforge/nagios/nrpe-2 .13. tar .gz
tar zxvf nagios-plugins-1.4.13. tar .gz
cd nagios-plugins-1.4.13
. /configure
make make install
chown nagios:nagios /usr/local/nagios
chown -R nagios:nagios /usr/local/nagios/libexec
cd ../
tar zxvf nrpe-2.13. tar .gz
cd nrpe-2.13
. /configure
make all
make install -plugin
make install -daemon
make install -daemon-config
sed -i 's@allowed_hosts=127.0.0.1@allowed_hosts=114.112.11.11@' /usr/local/nagios/etc/nrpe .cfg
/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe .cfg -d
echo "/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d" >> /etc/rc . local
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#allowed_hosts这行是将原先的127.0.0.1由现在的服务器地址114.112.11.11地址代替(已作无害处理),这行代码大家可以根据实际需要考虑是否增加,接下来的工作就是调试Nagios服务器端了,具体过程这里略过。
事实上,在机器进IDC机房之前,像nagios和puppet客户端软件,应该在每台上线机器上部署安装好,机器上线前肯定首先是集中在自己的局域网内Kickstart后然后初始化,这时网络稳定、调试也方便,所以用puppet自动化维化既方便又省力,这样免得机器上线以后又远程维护安装,即耗了人力成本,而且也增加了机器风险。另注:我看许多朋友都是自行编写SHELL脚本作为Nagios插件来作为对MySQL主从同步的补充功能,其实Nagios中有自带的check_mysql及check_mysql_health插件来实现,由于check_mysql在部署过程中老是频繁报“段错误”,所以目前主要还是用check_mysql_health,因为我们不仅仅是监控从机上面的SQL和IO进程,更重要的是,我们要监控从机的延迟时间。
本文转自 抚琴煮酒 51CTO博客,原文链接:http://blog.51cto.com/yuhongchun/1108612,如需转载请自行联系原作者