标签：检查 back nginx反向代理 linux基础 system roo 监控脚本 style web
任务一目标：自动部署、初始配置、并启动nginx反向代理服务
把任务拆分来看-自动部署部分，就是先下载安装Nginx
首先建立一个很NB霸气的目录还有一个同样NB霸气的.sh文件
/NBshell/MissionOne.sh
自动化部署代码如下：
#/bin/bash systemctl status nginx if(($?==4)) then yum install -y nginx if(($?==0)) then #echo ‘Yes!‘ systemctl start nginx if(($?==0)) then echo "Congratulations!! Nginx start OK!!" else echo "Sorry is Fail!!!" fi else echo"sorry install is Fail!!!" fi elif(($?==3)) then systemctl start nginx if(($?==0)) then echo "Congratulations!! Nginx start OK!!!" else echo "sorry!!" fi elif(($?==0)) then echo "OKOKOK!!!" else echo "I am so sorry" fi
检测系统是否安装nginx如果没有，就安装nginx，并启动
如果已安装未启动，就启动，如果已启动，就万事大吉了！
其次是初始化配置成反向代理，也就是对/etc/nginx/nginx.config进行编辑
使用sed流式编辑工具
1 echo "config writing...." 2 sed -ri ‘/^http/a upstream Yanlong {‘ /etc/nginx/nginx.conf 3 sed -ri ‘/^upst/a server yanlongweb1\;‘ /etc/nginx/nginx.conf 4 sed -ri ‘/^server yanlongweb1/a server yanlongweb2\;‘ /etc/nginx/nginx.conf 5 sed -ri ‘/^server yanlongweb2/a \}‘ /etc/nginx/nginx.conf 6 sed -ri ‘/^(\ +)(location)(\ )(\/)/a proxy_pass http:\/\/Yanlong\;‘ /etc/nginx/nginx.conf 7 echo"config write is OK!" 8 systemctl reload nginx 9 if(($?==0)) 10 then 11 echo "HTTP load balancer is OK!" 12 else 13 echo "Sorry!!" 14 fi
脚本执行成功！服务器配置完成！
任务二目标：自动部署、初始配置、并启动三台web
由于物理环境的限制，只能开启两台WEB服务器分别为yanlongweb1和yanlongweb2
并执行以下脚本对nginx进行安装部署配置，并启动
#/bin/bash systemctl status nginx if(($?==4)) then yum install -y nginx if(($?==0)) then #echo ‘Yes!‘ systemctl start nginx if(($?==0)) then echo "Congratulations!! Nginx start OK!!" else echo "Sorry is Fail!!!" fi else echo"sorry install is Fail!!!" fi elif(($?==3)) then systemctl start nginx if(($?==0)) then echo "Congratulations!! Nginx start OK!!!" else echo "sorry!!" fi elif(($?==0)) then echo "OKOKOK!!!" else echo "I am so sorry" fi echo "config writing...." sed -ri ‘/^(\ +)(location)(\ )(\/)/a root\ \/nginxwebservice\;‘ /etc/nginx/nginx.conf sed -ri ‘/^root\ \/nginxwebservice/a index\ web.html\;‘ /etc/nginx/nginx.conf echo "config write is OK!" systemctl reload nginx if(($?==0)) then echo "HTTP load balancer YanlongWEBservice is OK!" else echo "Sorry!!" fi
脚本执行完成，检查服务启动状态
现在进行访问web1
访问web2
任务一中搭建的反向代理：
访问反向代理服务器：192.168.16.119
脚本执行成功！服务器搭建成功
任务三目标：监控脚本：监控每台机器的内存使用率>70%,则输出报警信息
#/bin/bash bu=`free | awk ‘NR==2{print $6}‘` to=`free | awk ‘NR==2{print $2}‘` mem=`expr "scale=2;$bu/$to" |bc -l | cut -d. -f2` while true do if(($mem >= 70)) then echo "目前内存使用率是:${mem}%" sleep 1 fi done
后台运行./LookMem.sh &
为了实现效果，我将内存的报警阈值调为15%
请看效果
标签：检查 back nginx反向代理 linux基础 system roo 监控脚本 style web
原文地址：http://www.cnblogs.com/DragonFire/p/6605749.html
