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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/sh ngxStatus=`ps aux | grep -v grep |grep -c nginx` function ngxProxyInstall() {if [ -e /usr/sbin/nginx ];
then echo "nginx already installed" exit 111else 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"fiif [ $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 222else yum install rpcbind nfs-utils -y -q echo "install NFS successful"fiif [ ! -d /share ];
then mkdir -p /share chmod -R o+w /sharefiecho ‘/share 192.168.126.0/24(rw,sync,fsid=0)‘ > /etc/exportssystemctl enable rpcbind.servicesystemctl enable nfs-server.service
systemctl start rpcbind.servicesystemctl start nfs-server.serviceecho "Start NFS successful"} 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；
#poxy上安装nginx代理，nfs客户端，脚本如下[root@proxy mnt]# cat install_nginx.sh#!/bin/bash#insatll nginx proxy IP=`ifconfig | awk -F" " ‘/inet/{print $2}‘ | head -1` #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 { server 192.168.16.54; server 192.168.16.55; } server { 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 192.168.16.128/24(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 fidone [root@python_web01 mnt]# cat install_nginx.sh#!/bin/bash#insatll nginx proxy IP=`ifconfig | awk -F" " ‘/inet/{print $2}‘ | head -1` #insyall nginx proxyfunction install_nginx() {yum install nginx -yecho "python_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 192.168.16.128:/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 fidone
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 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)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/bashcpu_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0mem_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.logmonitor_mem &>> /tmp/monitor.logmonitor_disk_inode &>> /tmp/monitor.logmonitor_disk_space &>> /tmp/monitor.log步骤四：编写计划任务* * * * * /root/servermonitor.sh
开发脚本自动部署及监控
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