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；
#!/bin/bashngxStatus=`ps -aux |grep -v grep |grep -c nginx`function ngxProxyInstall(){if [ -e /usr/sbin/nginx ]; then echo 'nginx already installed'p exit 0000else yum clean all yum install epel-release -y yum install nginx -y echo 'install nginx successful'fiif [ -e /etc/nginx/nginx.conf ]; then /usr/bin/cp /etc/nginx/nginx.conf /etc/nginx/nginx.conf.bak sed -ri '/^http/a\\t upstream michael { \n\t server 192.168.145.135 weight=3; \n\t server 192.168.145.137;\n\t server 192.168.145.136;\n\t }' /etc/nginx/nginx.conf sed -ri '/^ *location \/ \{/a\\t\t proxy_pass http:\/\/michael;' /etc/nginx/nginx.conf echo "welcome to beijing" >/usr/share/nginx/html/index.html echo 'Configuration successful'fiif [ $ngxStatus -lt 2 ]; then systemctl start nginx echo 'start nginx successful'fi}function nfsInstall(){if [ -e /usr/sbin/nfs]; then echo'NFS already installed' exit 0000else yum clean all yum install rpcbind nfs-utils -y echo 'install NFS successful'fiif [ -z /etc/exports ]; then echo '/share 192.168.145.0/24(rw,sync,fsid=0)' > /etc/exports echo 'deploy Exports successful'fimkdir -p /sharechmod -R o+w /sharemount -t nfs 192.168.145.130:/share /usr/share/nginx/htmlsystemctl enable nfs-server.servicesystemctl enable rpcbind.servicesystemctl start rpcbind.servicesystemctl start nfs-server.service}ngxProxyInstallnfsInstall
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
#!/bin/bashngxStatus=`ps -aux |grep -v grep |grep -c nginx`function ngxWebInstall(){if [ -e /usr/sbin/nginx ]; then echo 'nginx already installed'p exit 0000else yum clean all yum install epel-release -y yum install nginx -y echo 'install nginx successful'fiif [ -e /etc/nginx/nginx.conf ]; then /usr/bin/cp /etc/nginx/nginx.conf /etc/nginx/nginx.conf.bak sed -ri '/^ *location \/ \{/a\\t\t root /usr/share/nginx/html;' /etc/nginx/nginx.conf echo "welcome web" >/usr/share/nginx/html/index.html echo 'Configuration successful'fiif [ $ngxStatus -lt 2 ]; then systemctl start nginx echo 'start nginx successful'fi}function nfsWebInstall(){if [ -e /usr/sbin/nfs]; then echo'NFS already installed' exit 0000else yum clean all yum install rpcbind nfs-utils -y echo 'install NFS successful'fiif [ -z /etc/exports ]; then echo '/share 192.168.145.0/24(rw,sync,fsid=0)' > /etc/exports echo 'deploy Exports successful'fimount -t nfs 192.168.145.130:/share /usr/share/nginx/htmlsystemctl enable nfs-server.servicesystemctl enable rpcbind.servicesystemctl start rpcbind.servicesystemctl start nfs-server.service}ngxWebInstallnfsWebInstal 2.编写监控脚本，监控集群内所有服务存活状态，内存剩余率检测，异常则发送报警邮件
第一步：
#!/usr/bin/python# -*- coding: UTF-8 -*-import sysimport smtplibimport email.mime.multipartimport email.mime.textserver = '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，缠缠绵绵来你家' 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) 第二步：将上述文件内容拷贝到/usr/bin/my_mail并chmod+x /usr/bin/my_mail
第三步：
#!/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 echo "bc install successful"fiif [ $mem_per -gt 80 ]; then msg="TIME:$(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}ngxMonitor &>>/tmp/monitor.lognfsMonitor &>>/tmp/monitor.logmemMonitor &>>/tmp/monitor.log 3.编写计划任务，定时运行监控脚本，完成监控操作
* * * * * /shell/sysCheck.sh