开发脚本自动部署及监控
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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；
#!/bin/sh ngxStatus=`ps aux | grep -v grep |grep -c nginx` function ngxProxyInstall() { if [ -e /usr/sbin/nginx ];
then echo "nginx already installed" exit 111 else yum install epel-release -y -q yum install gcc-* glibc-* openssl openssl-devel pcre pcre-devel zlib zlib-devel -y -q yum install nginx -y -q echo "install nginx successful" fi
if [ -f /etc/nginx/nginx.conf ];
then /bin/cp /etc/nginx/nginx.conf /etc/nginx/nginx.conf.bak sed -ri ‘/^http/a\\t upstream luchuangao { \n\t server 192.168.126.132 weight=3;\n\t server 192.168.126.133;\n\t server 192.168.126.134;\n\t }‘ /etc/nginx/nginx.conf sed -ri ‘/^ *location \/ \{/a\\t\t proxy_pass http://luchuangao;‘ /etc/nginx/nginx.conf echo "Configuration successful" fi if [ $ngxStatus -lt 2 ];
then systemctl start nginx echo "Start nginx successful" fi } function nfsInstall() { if [ -e /usr/sbin/rpcinfo ];then echo "nfs already installed" exit 222 else yum install rpcbind nfs-utils -y -q echo "install NFS successful" fi if [ ! -d /share ];
then mkdir -p /share chmod -R o+w /share fi echo ‘/share 192.168.126.0/24(rw,sync,fsid=0)‘ > /etc/exports systemctl enable rpcbind.service systemctl enable nfs-server.service
systemctl start rpcbind.service systemctl start nfs-server.service echo "Start NFS successful" } ngxProxyInstall nfsInstall
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；
#poxy上安装nginx代理，nfs客户端，脚本如下 [[email protected] mnt]# cat install_nginx.sh #!/bin/bash #insatll nginx proxy IP=`ifconfig | awk -F" " ‘/inet/{print $2}‘ | head -1` #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 { server 192.168.16.54; server 192.168.16.55; } server { 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 192.168.16.128/24(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 [[email protected]_web01 mnt]# cat install_nginx.sh #!/bin/bash #insatll nginx proxy IP=`ifconfig | awk -F" " ‘/inet/{print $2}‘ | head -1` #insyall nginx proxy function install_nginx() { yum install nginx -y echo "python_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 192.168.16.128:/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
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
步骤一：准备发送邮件的工具
#!/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‘] = ‘[email protected]‘
msg[‘To‘] = ‘[email protected]‘
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)
步骤二：将上述文件内容拷贝到/usr/bin/mail并chmod+x /usr/bin/mail
步骤三：然后新建监控脚本servermonitor.sh
#!/bin/bash
cpu_limit=0 #cpu使用超过90%则报警,此处我们为了得到报警邮件的实验效果，直接设置成0
mem_limit=0 #内存使用超过90%则报警，同上
disk=‘/dev/sda1‘ #需要监控的磁盘名
disk_inode_limit=0 #磁盘inode使用超过90%则报警，同上
disk_space_limit=0 #磁盘空间使用超过90%则报警，同上
function monitor_cpu(){
cpu_free=`vmstat 1 5 |awk ‘NR>=3{x = x + $15} END {print x/5}‘ |awk -F. ‘{print $1}‘`
cpu_use=$((100-cpu_free))
if [ $cpu_use -gt $cpu_limit ]
then
msg="TIME:$(date +%F_%T)
HOSTNAME:$(hostname)
IPADDR:$(ifconfig |awk ‘NR==2{print $2}‘)
MSG:CPU usage exceeds the limit,current value is ${cpu_use}%"
echo $msg
/usr/bin/mail $msg
fi
}
function monitor_mem(){
mem_total=`free |awk ‘NR==2{print $2}‘`
mem_use=`free |awk ‘NR==2{print $3}‘`
mem_per=`echo "scale=2;$mem_use/$mem_total" |bc -l|cut -d. -f2`
if [ $mem_per -gt $mem_limit ]
then
msg="TIME:$(date +%F_%T)
HOSTNAME:$(hostname)
IPADDR:$(ifconfig |awk ‘NR==2{print $2}‘)
MSG:Memory usage exceeds the limit,current value is ${mem_per}%"
echo $msg
/usr/bin/mail $msg
fi
}
function monitor_disk_inode(){
inode_use=`df -i $disk |awk ‘NR==2{print $5}‘ |cut -d% -f1`
if [ $inode_use -gt $disk_inode_limit ]
then
msg="TIME:$(date +%F_%T)
HOSTNAME:$(hostname)
IPADDR:$(ifconfig |awk ‘NR==2{print $2}‘)
MSG:Disk inode usage exceeds the limit,current value is ${inode_use}%"
echo $msg
/usr/bin/mail $msg
fi
}
function monitor_disk_space(){
space_use=`df $disk |awk ‘NR==2{print $5}‘|cut -d% -f1`
if [ $space_use -gt $disk_space_limit ]
then
msg="TIME:$(date +%F_%T)
HOSTNAME:$(hostname)
IPADDR:$(ifconfig |awk ‘NR==2{print $2}‘)
MSG:Disk space usage exceeds the limit,current value is ${space_use}%"
echo $msg
/usr/bin/mail $msg
fi
}
monitor_cpu &>> /tmp/monitor.log
monitor_mem &>> /tmp/monitor.log
monitor_disk_inode &>> /tmp/monitor.log
monitor_disk_space &>> /tmp/monitor.log
步骤四：编写计划任务
* * * * * /root/servermonitor.sh
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