题:
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,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
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1、安装nginx及nfs服务端
#!/bin/bash
#insatll nginx proxy
IP=`ifconfig |awk -F" " 'NR==2{print $2}'
`
#insyall nginx proxy
function install_nginx() {
yum remove nginx -y
yum install nginx -y
touch /etc/nginx/conf.d/proxy.conf
cat > /etc/nginx/conf.d/proxy.conf <<EOF
upstream web {
ip_hash;
server 192.168.17.126;
server 192.168.17.127;
}
server {
ip_hash;
listen 80;
server_name $IP;
location / {
proxy_pass http://web;
}
}
EOF
systemctl start nginx
}
#install nfs server
function install_nfs_server() {
yum install rpcbind nfs-utils -y
[ -d /share ] || mkdir /share && chmod o+w /share
echo "/share 192.168.17.128/24(rw,sync,fsid=0)"
> /etc/exports
systemctl start rpcbind.service
systemctl start nfs-server.service
}
while
:
do
read -p "please choice your install server{nginx|nfs}: "
server
if
[ $server = "nginx"
]
then
install_nginx
elif [ $server = "nfs"
]
then
install_nfs_server
else
exit
fi
done
2、安装客户端nginx-nfs
[root@web01 mnt]# cat install_nginx.sh
#!/bin/bash
#insatll nginx
IP=`ifconfig |awk -F" " 'NR==2{print $2}'`
#insyall nginx proxy
function install_nginx() {
yum install nginx -y
echo "welcome to web01"
>/usr/share/nginx/html/index.html
systemctl start nginx
}
#install nfs server
function install_nfs_server() {
yum install rpcbind nfs-utils -y
systemctl start rpcbind.service
systemctl start nfs-server.service
mount -t nfs 192.168.17.128:/share /usr/share/nginx/html/
}
while
:
do
read -p "please choice your install server{nginx|nfs}: "
server
if
[ $server = "nginx"
]
then
install_nginx
elif [ $server = "nfs"
]
then
install_nfs_server
else
exit
fi
done
3、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
#!/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'] = '你是风儿我是沙,缠缠绵绵回我家'
msg['From'] = 'python4_mail@163.com'
msg['To'] = 'python4_recvmail@163.com'
user = 'python4_mail'
pwd = 'sbalex3714'
content='%s\n%s'
%('\n'.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)
2)将监控脚本重命名为mail,拷贝到/usr/bin/mail.赋x权限
3)定时监控脚本
#!/bin/sh
function ngxMonitor(){ #监控nginx服务
ps aux | grep nginx| grep -v grep &>/dev/null
if
[ $? -ne 0 ];then
msg="TIME:$(date +%F_%T)
HOSTNAME:$(hostname)
IPADDR:$(/usr/sbin/ifconfig |awk 'NR==2{print $2}')
MSG:Nginx program is
crash, Waiting to restart"
echo $msg
/usr/bin/my_mail $msg
systemctl restart nginx
fi
}
function nfsMonitor(){ #监控nfs服务
ps aux | grep nfs| grep -v grep &>/dev/null
if
[ $? -ne 0 ];then
msg="TIME:$(date +%F_%T)
HOSTNAME:$(hostname)
IPADDR:$(/usr/sbin/ifconfig |awk 'NR==2{print $2}')
MSG:NFS program is
crash, Waiting to restart"
echo $msg
/usr/bin/my_mail $msg
systemctl restart nginx
fi
}
function memMonitor(){ #监控内存
mem_use=`free | awk 'NR==2{print $3}'`
mem_total=`free | awk 'NR==2{print $2}'`
mem_per=`echo "scale=2;$mem_use/$mem_total"|bc -l |cut -d . -f2`
if
[ ! -e /usr/bin/bc ];then
yum install bc -y -q
echo "bc install successful"
fi
if
(( $mem_per > 10 )); then
msg="TIME:$(date +%F_%T)
HOSTNAME:$(hostname)
IPADDR:$(/usr/sbin/ifconfig |awk 'NR==2{print $2}')
MSG:Memory usage exceeds the limit,current value is
${mem_per}%"
echo $msg
/usr/bin/my_mail $msg
fi
}
function diskMonitor(){ #监控磁盘
space_use=`df $disk |awk 'NR==2{print $5}'|cut -d% -f1`
if
[ $space_use -gt 80 ];then
msg="TIME:$(date +%F_%T)
HOSTNAME:$(hostname)
IPADDR:$(/usr/sbin/ifconfig |awk 'NR==2{print $2}')
MSG:Disk space usage exceeds the limit,current value is
${space_use}%"
echo $msg
/usr/bin/my_mail $msg
fi
}
ngxMonitor &>>/tmp/monitor.log
nfsMonitor &>>/tmp/monitor.log
memMonitor &>>/tmp/monitor.log
diskMonitor &>>/tmp/monitor.log
4、计划任务,每天早上9点执行
00 09 * * * /shell/sysCheck.sh
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