自动化部署nginx负载均衡及监控短信报警

我爱小虾

　　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
　　------------------------------------------------------
　　1、安装nginx及nfs服务端
　　#!/bin/bash
#insatll nginx proxy  IP=`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[iyunv@web01 mnt]# 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[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/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