利用Nginx做端口转发

Posted 2021-04-11 醉醉鱼

需求

支持访问http://localhost和https://localhost，把80和443端口都转发到nginx server，通过Nginx server再转发给Rails App的3000端口。

解决

首先搭建一个F5的load balance，把所有的request都转发到8680端口。
再搭建一个Nginx server，监听8086端口，把所有的request都转发到3000端口。正常情况下，Nginx server一般都是80端口，这里只是避免和本地80端口冲突，故用了8680端口。
此外，这个Nginx server有些鸡肋，本来就可以直接把F5转发到3000端口的，但是一般Rails都是搭配Nginx的，就单纯再模拟一次Nginx。

步骤

创建在主机上面创建self-trusted cert，放到tmp/ssl目录下

openssl req -x509 -sha256 -nodes -newkey rsa:2048 \ -days 365 -keyout localhost.key -out localhost.crt

接着创建docker-compose.yml 文件和相关nginx配置文件。
docker-compose.yml

version: '2'services: f5: image: nginx:latest volumes: - ./tmp/nginx/f5_https_pool.conf:/etc/nginx/conf.d/f5_https_pool.conf - ./tmp/nginx/f5_http_pool.conf:/etc/nginx/conf.d/default.conf - ./tmp/ssl:/etc/nginx/ssl ports: - 80:80 - 443:443
 nginx: image: nginx:latest volumes: - ./tmp/nginx/nginx_server.conf:/etc/nginx/conf.d/default.conf ports: - 8680:8680

tmp/nginx/nginx_server.conf

upstream rails { server host.docker.internal:3000;}
server { listen 8680 default_server;
 server_name localhost;
 location / { proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header X-Forwarded-Proto $http_x_forwarded_proto; proxy_redirect off; proxy_pass http://rails; }}

tmp/nginx/f5_http_pool.conf

upstream nginx_server {  server host.docker.internal:8680;}
server { listen 80;
 server_name localhost;  # return 301 https://$host$request_uri;
 location / {  proxy_set_header X-Real-IP $remote_addr;  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;  proxy_set_header Host $http_host; proxy_set_header X-Forwarded-Proto http; proxy_redirect off; proxy_pass http://nginx_server;  }}

tmp/nginx/f5_https_pool.conf

server { listen 443 ssl default_server;
 server_name localhost;  ssl_certificate /etc/nginx/ssl/localhost.crt; ssl_certificate_key /etc/nginx/ssl/localhost.key; ssl_protocols TLSv1 TLSv1.1 TLSv1.2; ssl_ciphers "EECDH+AESGCM:EDH+AESGCM:ECDHE-RSA-AES128-GCM-SHA256:AES256+EECDH:DHE-RSA-AES128-GCM-SHA256:AES256+EDH:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA:DES-CBC3-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!MD5:!PSK:!RC4";
 location / { proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header X-Forwarded-Proto https; proxy_redirect off; proxy_pass http://nginx_server; }}

最后，执行docker-compose up，试试访问http://localhost和https://localhost吧。