nfs cron shell 作业

作业一：
nginx反向代理三台web服务器，实现负载均衡
所有的web服务共享一台nfs的存储
2台服务器
nginx 【lb】 :101.200.206.6
nginx 【web】:101.200.169.119

准备环境：
分别在所有服务器执行
=======>part1:
	iptables -F
	#systemctl disable firewalld #开机默认关闭 
	#systemctl stop firewalld  #立即关闭
	#systemctl status firewalld 
		
	setenforce 0
	#/etc/sysconfig/selinux
	#SELINUX=disabled
==========>part2:
安装程序
yum install rpcbind nfs-utils -y
yum install nginx -y
==========>part3:

【lb】
创建共享目录 mkdir /nfs
修改配置文件
[root@iZ25j36rr97Z nfs]# cat /etc/exports
/nfs *(rw,sync,fsid=0)
修改权限
chmod -R o+w /nfs
先为rpcbind和nfs做开机启动：
systemctl enable nfs-server.service
systemctl enable rpcbind.service
systemctl start rpcbind.service
systemctl start nfs-server.service
确认启动成功
[root@iZ25j36rr97Z nfs]# rpcinfo
   program version netid     address                service    owner
    100000    4    tcp       0.0.0.0.0.111          portmapper superuser
    100000    3    tcp       0.0.0.0.0.111          portmapper superuser
    100000    2    tcp       0.0.0.0.0.111          portmapper superuser
    100000    4    udp       0.0.0.0.0.111          portmapper superuser
    100000    3    udp       0.0.0.0.0.111          portmapper superuser
    100000    2    udp       0.0.0.0.0.111          portmapper superuser
    100000    4    local     /var/run/rpcbind.sock  portmapper superuser
    100000    3    local     /var/run/rpcbind.sock  portmapper superuser
    100011    1    udp       0.0.0.0.3.107          rquotad    superuser
    100011    2    udp       0.0.0.0.3.107          rquotad    superuser
    100011    1    tcp       0.0.0.0.3.107          rquotad    superuser
    100011    2    tcp       0.0.0.0.3.107          rquotad    superuser
    100005    1    udp       0.0.0.0.169.8          mountd     superuser
    100005    1    tcp       0.0.0.0.202.245        mountd     superuser
    100005    2    udp       0.0.0.0.200.5          mountd     superuser
    100005    2    tcp       0.0.0.0.190.185        mountd     superuser
    100005    3    udp       0.0.0.0.236.40         mountd     superuser
    100005    3    tcp       0.0.0.0.152.224        mountd     superuser
    100003    2    tcp       0.0.0.0.8.1            nfs        superuser
    100003    3    tcp       0.0.0.0.8.1            nfs        superuser
    100003    4    tcp       0.0.0.0.8.1            nfs        superuser
    100227    2    tcp       0.0.0.0.8.1            nfs_acl    superuser
    100227    3    tcp       0.0.0.0.8.1            nfs_acl    superuser
    100003    2    udp       0.0.0.0.8.1            nfs        superuser
    100003    3    udp       0.0.0.0.8.1            nfs        superuser
    100003    4    udp       0.0.0.0.8.1            nfs        superuser
    100227    2    udp       0.0.0.0.8.1            nfs_acl    superuser
    100227    3    udp       0.0.0.0.8.1            nfs_acl    superuser
    100021    1    udp       0.0.0.0.134.187        nlockmgr   superuser
    100021    3    udp       0.0.0.0.134.187        nlockmgr   superuser
    100021    4    udp       0.0.0.0.134.187        nlockmgr   superuser
    100021    1    tcp       0.0.0.0.218.123        nlockmgr   superuser
    100021    3    tcp       0.0.0.0.218.123        nlockmgr   superuser
    100021    4    tcp       0.0.0.0.218.123        nlockmgr   superuser
    100024    1    udp       0.0.0.0.131.201        status     29
    100024    1    tcp       0.0.0.0.206.148        status     29
[root@iZ25j36rr97Z nfs]# exportfs 
/nfs            <world>
默认查看自己共享的服务
[root@iZ25j36rr97Z nfs]# showmount -e
Export list for iZ25j36rr97Z:
/nfs *
[root@iZ25j36rr97Z nfs]# 
修改【lb】 nginx配置
[root@iZ25j36rr97Z conf]# cat nginx.conf
worker_processes  1;
events {
    worker_connections  1024;
}
http {
    upstream nginxlb 
      {
        server 101.200.206.67:8081;
        server 101.200.169.119:8081;
        server 101.200.169.119:8082;
        }
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    server {
        listen       80;
        server_name  101.200.206.67;
        location / {
            proxy_pass http://nginxlb;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }
       server {
         listen       8081;
         server_name  101.200.206.67;
        location / {
        root   html;
            index  nginx.txt index.html index.htm;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }
}
在根目录添加 nginx.txt 
echo 'nginx' >nginx.txt
mount -t nfs 101.200.206.67:/nfs /home/service/nginx/html


客户端执行
yum install rpcbind nfs-utils -y
mount -t nfs 101.200.206.67:/nfs /home/service/nginx/html
修改nginx配置
[root@iZ2ze0sw83m5wno8bd2yudZ conf]# cat nginx.conf
worker_processes  1;
events {
    worker_connections  1024;
}
http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    server {
        listen       8081;
        server_name  localhost;
        location / {
            root   html;
            index  8081.txt index.html index.htm;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }
}
[root@iZ2ze0sw83m5wno8bd2yudZ conf]# cat nginx1.conf
worker_processes  1;
events {
    worker_connections  1024;
}
http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    server {
        listen       8082;
        server_name  localhost;
        location / {
            root   html;
            index  8082.txt index.html index.htm;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }
}

echo '8081' >8081.txt
echo '8082' >8082.txt
启动服务端和客户端nginx
/home/service/nginx/sbin/nginx -c /home/service/nginx/conf/nginx.conf
/home/service/nginx/sbin/nginx -c /home/service/nginx/conf/nginx1.conf

在浏览器端查看轮询结果
3台web 依次被lb调度