題：
開發腳本自動部署及監控
1.編寫腳本自動部署反向代理、web、nfs；
要求：
I、部署nginx反向代理三個web服務，調度算法使用加權輪詢；
II、所有web服務使用共享存儲nfs，保證所有web都對其有讀寫權限，保證數據一致性；
2.編寫監控腳本，監控集群內所有服務存活狀態，內存、磁盤剩余率檢測，異常則發送報警郵件
3.編寫計划任務，定時運行監控腳本，完成監控操作
------------------------------------------------------
1、安裝nginx及nfs服務端
#!/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、安裝客戶端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、編寫監控腳本，監控集群內所有服務存活狀態，內存、磁盤剩余率檢測，異常則發送報警郵件
#!/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(
'郵件發送成功email has send out !'
)
if
__name__ ==
'__main__'
:
msg = email.mime.multipart.MIMEMultipart()
msg[
'Subject'
] =
'你是風兒我是沙，纏纏綿綿回我家'
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:])) #格式處理，專門針對我們的郵件格式
txt = email.mime.text.MIMEText(content, _charset=
'utf-8'
)
msg.attach(txt)
sendmail(server,port,user,pwd,msg)
2)將監控腳本重命名為mail，拷貝到/usr/bin/mail.賦x權限
3）定時監控腳本
#!/bin/sh
function ngxMonitor(){ #監控nginx服務
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(){ #監控nfs服務
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(){ #監控內存
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(){ #監控磁盤
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、計划任務，每天早上9點執行
00 09 * * * /shell/sysCheck.sh
分 時 日 月 周