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；
要求：
I、部署nginx反向代理三个web服务，调度算法使用加权轮询；
II、所有web服务使用共享存储nfs，保证所有web都对其有读写权限，保证数据一致性；
2.编写监控脚本，监控集群内所有服务存活状态（需要监控的有所有nginx，nfs
nfs也得监控），内存、磁盘剩余率检测，异常则发送报警邮件
3.编写计划任务，定时运行监控脚本，完成监控操作
1.部署nginx反向代理三个web服务，调度算法使用加权轮询（由于计算机问题，只开2台服务器）
#/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 "OK!"
else
echo "I am so sorry"
fi
echo "config writing...."
grep 'upstream' /etc/nginx/nginx.conf
if(($?!=0))
then
sed -ri '/^http/a upstream Yanlong {' /etc/nginx/nginx.conf
sed -ri '/^upst/a server yanlongweb1 weight=3;' /etc/nginx/nginx.conf
sed -ri '/^server yanlongweb1/a server yanlongweb2;' /etc/nginx/nginx.conf
sed -ri '/^server yanlongweb2/a }' /etc/nginx/nginx.conf
sed -ri '/^( +)(location)( )(/)/a proxy_pass http://Yanlong;' /etc/nginx/nginx.conf
fi
echo "config write is OK!"
systemctl reload nginx
if(($?==0))
then
echo "HTTP load balancer is OK!"
else
echo "Sorry!!"
fi
systemctl status nfs
if(($?==4))
then
yum install rpcbind nfs-utils -y
if(($?==0))
then
#echo 'Yes!'
systemctl start nfs
if(($?==0))
then
echo "Congratulations! nfs start OK!"
else
echo "Sorry is Fail!!!"
fi
else
echo"sorry install is Fail!"
fi
elif(($?==3))
then
systemctl start nfs
if(($?==0))
then
echo "Congratulations!! nfs start OK!!"
else
echo "sorry!"
fi
elif(($?==0))
then
echo "OKOKOK!"
else
echo "I am so sorry"
fi
echo "config writing...."
echo "/webindex 192.168.16.0/24(rw,sync,fsid=0)" > /etc/exports
echo "config write is OK!"
systemctl reload nfs
if(($?==0))
then
echo "NFS service is OK!"
else
echo "Sorry!!"
fi
2.所有web服务使用共享存储nfs，保证所有web都对其有读写权限，保证数据一致性；
#/bin/bash
systemctl status nginx
if(($?==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(($?==0))
then
echo "OK!"
else
echo "I am so sorry"
fi
echo "config writing...."
sed -ri '/^( +)(location)( )(/)/a root /nginxwebservice;' /etc/nginx/nginx.conf
sed -ri '/^root /nginxwebservice/a index web.html;' /etc/nginx/nginx.conf
echo "config write is OK!"
systemctl reload nginx
if(($?==0))
then
echo "HTTP load balancer YanlongWEBservice is OK!"
else
echo "Sorry!"
fi
systemctl status nfs
if(($?==4))
then
yum install rpcbind nfs-utils -y
if(($?==0))
then
#echo 'Yes!'
systemctl start nfs
if(($?==0))
then
echo "Congratulations!! nfs start OK!"
else
echo "Sorry is Fail!"
fi
else
echo"sorry install is Fail!"
fi
elif(($?==3))
then
systemctl start nfs
if(($?==0))
then
echo "Congratulations! nfs start OK!"
else
echo "sorry!"
fi
elif(($?==0))
then
echo "OK!"
else
echo "I am so sorry"
fi
echo "config writing...."
mount -t nfs 192.168.16.120:/webindex/ /nginxwebservice/
echo "config write is OK!"
systemctl reload nfs
if(($?==0))
then
echo "NFS service is OK!"
else
echo "Sorry!!"
fi
1.编写监控脚本，监控集群内 Nginx、NFS 服务存活状态，内存、磁盘剩余率检测，异常则发送报警邮件
先写个发送邮件的文件
#!/usr/bin/python
# -*- coding: UTF-8 -*-
import sys
import smtplib
import email.mime.multipart
import email.mime.text
server = 'smtp.163.com'
port = '25'
def sendmail(server,port,user,pwd,msg):
smtp = smtplib.SMTP()
smtp.connect(server,port)
smtp.login(user, pwd)
smtp.sendmail(msg['from'], msg['to'], msg.as_string())
smtp.quit()
print('邮件发送成功email has send out !')
if __name__ == '__main__':
msg = email.mime.multipart.MIMEMultipart()
msg['Subject'] = '服务器报警请注意！'
msg['From'] = 'python4_mail@163.com'
msg['To'] = 'python4_recvmail@163.com'
user = 'python4_mail'
pwd = 'sbalex3714'
content='%s
%s' %('
'.join(sys.argv[1:4]),' '.join(sys.argv[4:])) #格式处理，专门针对我们的邮件格式
txt = email.mime.text.MIMEText(content, _charset='utf-8')
msg.attach(txt)
sendmail(server,port,user,pwd,msg)
再写监控脚本
#/bin/bash
bu=`free | awk 'NR==2{print $6}'`
to=`free | awk 'NR==2{print $2}'`
mem=`expr "scale=2;$bu/$to" |bc -l | cut -d. -f2`
if(($mem >= 70))
then
msg="TIME:$(date +%F_%T)
HOSTNAME:$(hostname)
IPADDR:$(ifconfig |awk 'NR==2{print $2}')
MSG:内存high了！已经用了${mem}%"
echo $msg
/usr/bin/pymail.py $msg
fi
systemctl status nginx
if(($?!=0))
then
msg="TIME:$(date +%F_%T)
HOSTNAME:$(hostname)
IPADDR:$(ifconfig |awk 'NR==2{print $2}')
MSG: Nginx 进程出现异常请注意查看！"
echo $msg
/usr/bin/pymail.py $msg
fi
systemctl status nfs
if(($?!=0))
then
msg="TIME:$(date +%F_%T)
HOSTNAME:$(hostname)
IPADDR:$(ifconfig |awk 'NR==2{print $2}')
MSG: NFS 进程出现异常请注意查看！"
echo $msg
/usr/bin/pymail.py $msg
fi
编写计划任务，定时运行监控脚本，完成监控操作
* * * * * /shell/sysCheck.sh