开发脚本自动部署及监控

1.编写脚本自动部署反向代理、web、nfs；

#!/bin/bash
yum install epel-release -y
yum install nginx -y
ps aux |grep nginx |grep -v ‘grep‘
    if [ $? -ne 0 ]
        then
            systemctl start nginx
    fi
sed -ri ‘/^http/a upstream xzhweb\{‘ /etc/nginx/nginx.conf
sed -ri ‘/^upstream/a server 192.168.16.99 weight=3；‘ /etc/nginx/nginx.conf
sed -ri ‘/^upstream/a least_conn; ‘ /etc/nginx/nginx.conf
sed -ri ‘/^server/a }; ‘ /etc/nginx/nginx.conf
sed -ri ‘/^server/a server 192.168.16.175；‘ /etc/nginx/nginx.conf
sed -ri ‘/^\ +location \/ /a proxy_pass http://xzhweb;‘ /etc/nginx/nginx.conf
systemctl stop firewalld
setenforce 0
systemctl restart nginx
    if [ $? -ne 0 ]
        then
           echo wellcome to congratulation
    fi
yum install rpcbind nfs-utils -y
mkdir /share
touch /share/share.txt
echo xuzheng666 > /share/share.txt
echo /share 192.168.16.0/24(rw,sync,fsid=0) > /etc/exports
chmod -R o+w /share
systemctl enable nfs-server.service
systemctl enable rpcbind.service
systemctl start rpcbind.service
systemctl start nfs-server.service
mount -t nfs 192.168.16.176:/share /var/www/html

2.编写监控脚本，监控集群内所有服务存活状态，内存、磁盘剩余率检测，异常则发送报警邮件

#!/bin/bash
ps aux |grep nginx |grep -v ‘grep‘
    if [ $? -ne 0 ]
        then
             wasai="TIME:$(date +%F_%T)
                 HOSTNAME:$(hostname)
                 IPADDR:$(ifconfig |awk ‘NR==2{print $2}‘)
                 WASAI:Nginx application error!"
            echo $wasai
            /usr/bin/my_mail $wasai
    fi
ps aux |grep nfs |grep -v ‘grep‘
    if [ $? -ne 0 ]
        then
            wasai="TIME:$(date +%F_%T)
                 HOSTNAME:$(hostname)
                 IPADDR:$(ifconfig |awk ‘NR==2{print $2}‘)
                 WASAI:Nfs application error!"
            echo $wasai
            /usr/bin/my_mail $wasai
    fi
mem_used=`free | awk ‘NR==2{print $3}‘`
mem_total=`free | awk ‘NR==2{print $2}‘`
y=$(($mem_total - $mem_used))
x=`expr "scale=2; $y/$mem_total" |bc -l |cut -d. -f2`
if ((x<100))
        then
            wasai="TIME:$(date +%F_%T)
                 HOSTNAME:$(hostname)
                 IPADDR:$(ifconfig |awk ‘NR==2{print $2}‘)
                 WASAI:Memory usage exceeds the limit,current value is $x%"
            echo $wasai
            /usr/bin/my_mail $wasai
fi    

 3.编写计划任务，定时运行监控脚本，完成监控操作

每五分钟运行24-1.sh监控脚本，并且给邮箱发邮件！！！