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； （1）、部署nginx反向代理三个web服务，调度算法使用加权轮询；
（2）、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；
脚本如下
#!/bin/sh
Nginx_WebInstall(){
systemctl stop firewalld
setenforce
ps -aux | grep nginx |grep -v "grep"
if [ $? -ne ]
then
yum install epel-release -y &>/dev/null;
yum install nginx -y &>/dev/null;
systemctl start nginx;
echo "nginx is successful!!"
else
systemctl restart nginx fi
} Conf_Nginx(){
if [ -f "/etc/nginx/nginx.conf" ]
then
sed -ri '/^http/a upstream xyyweb { ' /etc/nginx/nginx.conf
sed -ri '/^upstream/a server 192.168.31.101 weight=3; \n }' /etc/nginx/nginx.conf
sed -ri '/^upstream/a server 192.168.31.164 weight=3;' /etc/nginx/nginx.conf
sed -ri '/^upstream/a server 192.168.31.131 weight=3;' /etc/nginx/nginx.conf
sed -ri '47a \\n\t location \/ {\n\t\t proxy_pass http://xyyweb;\n\t}' /etc/nginx/nginx.conf
elif [ $? -eq ]
then
systemctl restart nginx
else
echo "input file false."
fi
} Nginx_WebInstall ##这个命令只安装web服务器
Conf_Nginx ##这个是进行修改配置文件（两者同时运行时是安装代理服务器） Nfs_install(){
if [ -s "/etc/exports" ]
then
systemctl stop firewalld
setenforce
yum -y install rpcbind nfs-utils &>/dev/null;
echo "rpcbind and nfs is successful!!"
elif [ $? -eq ]
then
systemctl enable nfs-server.service;
systemctl enable rpcbind.service;
systemctl start rpcbind;
systemctl start nfs;
Rpc=`rpcinfo -p localhost|wc -l;`
ps -ef|grep nfsd
elif [ $Rpc -eq -o $? -eq ]
then
echo "rpcbind and nfs is start success!!"
fi
mkdir /share; echo "/share 192.168.31.0/24 (rw,sync,fsid=0)" >/etc/exports chmod /share }
Nfs_install ##安装nfs的命令；
web节点服务器挂载nfs是 只需在上面执行mount -t nfs ipaddress:/share /web-serverdir
安装nginx：
修改配置文件：
安装nfs：
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
#!/bin/sh
NgxMonitor(){
ps -ef | grep nginx| grep -v grep
if [ $? -ne ]
then
msg="TIME:$(date +%F_%T)
HOSTNAME:$(hostname)
IPADDR:$(ifconfig |awk 'NR==2{print $2}')
MSG:Nginx program is crash, Waiting to restart"
echo $msg
/usr/bin/my_mail $msg
systemctl restart nginx
fi
} NfsMonitor(){
ps -ef | grep nfs| grep -v grep
if [ $? -ne ]
then
msg="TIME:$(date +%F_%T)
HOSTNAME:$(hostname)
IPADDR:$(ifconfig |awk 'NR==2{print $2}')
MSG:NFS program is crash, Waiting to restart"
echo $msg
/usr/bin/my_mail $msg
systemctl restart nginx
fi
} MemMonitor(){
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 (( $mem_per > ))
then
msg="TIME:$(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/my_mail $msg
fi
} DiskMonitor(){
space_use=`df $disk |awk 'NR==2{print $5}'|cut -d% -f1` if [ $space_use -gt ]
then
msg="TIME:$(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 $msg
fi
} NgxMonitor
NfsMonitor
MemMonitor
DiskMonitor
3.编写计划任务，定时运行监控脚本，完成监控操作
