自动化部署nginx负载均衡及监控短信报警
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 proxyIP=`ifconfig |awk -F" " 'NR==2{print $2}'`#insyall nginx proxyfunction install_nginx() {yum remove nginx -yyum install nginx -ytouch /etc/nginx/conf.d/proxy.confcat > /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; } }EOFsystemctl start nginx} #install nfs serverfunction install_nfs_server() {yum install rpcbind nfs-utils -y[ -d /share ] || mkdir/share && chmod o+w /shareecho "/share 192.168.17.128/24(rw,sync,fsid=0)" > /etc/exportssystemctl start rpcbind.servicesystemctl 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 fidone2、安装客户端nginx-nfs# cat install_nginx.sh#!/bin/bash#insatll nginx IP=`ifconfig |awk -F" " 'NR==2{print $2}'`#insyall nginx proxyfunction install_nginx() {yum install nginx -yecho "welcome to web01" >/usr/share/nginx/html/index.htmlsystemctl start nginx} #install nfs serverfunction install_nfs_server() {yum install rpcbind nfs-utils -ysystemctl start rpcbind.servicesystemctl start nfs-server.servicemount -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 fidone3、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 sysimport smtplibimport email.mime.multipartimport 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),' '.join(sys.argv)) #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/shfunction ngxMonitor(){#监控nginx服务ps aux | grep nginx| grep -v grep &>/dev/nullif [ $? -ne 0 ];then msg="TIME:$(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 nginxfi}function nfsMonitor(){ #监控nfs服务ps aux | grep nfs| grep -v grep &>/dev/nullif [ $? -ne 0 ];then msg="TIME:$(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 nginxfi}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"fiif (( $mem_per > 10 )); then msg="TIME:$(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 $msgfi}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 $msgfi} ngxMonitor&>>/tmp/monitor.lognfsMonitor&>>/tmp/monitor.logmemMonitor&>>/tmp/monitor.logdiskMonitor &>>/tmp/monitor.log 4、计划任务，每天早上9点执行00 09 * * * /shell/sysCheck.sh分 时 日 月 周
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