飞鱼博客需求：我的电脑里装了两个虚拟机。一个是nat加host-only网络环境，一个是‘nat网络’网络环境。
host-only的网络的虚拟机（后文简称A）里在80端口提供两个网站服务：homestead.test和bunian.cn。
nat网络的虚拟机（后文简称B）里在80端口提供一个网站服务：rocky.com。
我现在希望我的局域网中的其他电脑能访问我电脑里的这三个服务。
解决方案：使用nginx做端口转发。
一、网络环境
A的网络：
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.2.15 netmask 255.255.255.0 broadcast 10.0.2.255
inet6 fe80::a00:27ff:fe9e:e528 prefixlen 64 scopeid 0x20<link>
ether 08:00:27:9e:e5:28 txqueuelen 1000 (Ethernet)
RX packets 32281 bytes 36852695 (36.8 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 12531 bytes 1588799 (1.5 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.10.10 netmask 255.255.255.0 broadcast 192.168.10.255
inet6 fe80::a00:27ff:fee0:1b57 prefixlen 64 scopeid 0x20<link>
ether 08:00:27:e0:1b:57 txqueuelen 1000 (Ethernet)
RX packets 28364 bytes 5341677 (5.3 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 55262 bytes 111451643 (111.4 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 12857 bytes 4268810 (4.2 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 12857 bytes 4268810 (4.2 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
A有两个网卡，一个是NAT的，一个是Host-only的。192.168.10.10是host-only的地址。
B的IP是10.0.0.3，映射80端口到我本机（macbook）8080端口。
二、nginx配置
worker_processes 1;
events {
worker_connections 1024;
}
http{
upstream bn{
server 127.0.0.1:8080;
}
upstream bunian{
server 192.168.10.10:80;
}
server {
listen 80;
server_name rocky.com;
access_log logs/book.log;
error_log logs/book.error;
location / {
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://bn;
}
}
server {
listen 80;
server_name bunian.cn;
access_log logs/movie.log;
error_log logs/movie.error;
location / {
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://bunian;
}
}
server {
listen 80;
server_name homestead.test;
access_log logs/movie.log;
error_log logs/movie.error;
location / {
proxy_set_header host $host;
proxy_set_header x-forwarded-for $proxy_add_x_forwarded_for;
proxy_pass http://bunian;
}
}
}
三、本机Host配置
127.0.0.1 rocky.com
127.0.0.1 bunian.cn
127.0.0.1 homestead.test
四、总结
就是通过nginx开放本机的80端口给局域网的用户访问。然后再通过nginx的端口转发功能将对应的请求转发到对应的电脑上。同一台虚拟机上多个网站都采用80端口提供服务的，使用server_name来区分。
