How to proxy locally using NGINX

[Bairon Paz]

Hi yall, I am trying to set up a proxy for my gRPC server.

I am using NGINX as a reverse proxy locally ran using docker-compose. My idea is to run the following:

api.domain.com/api to my regular Express server and api.domain.com/grpc my regular grpc server.

I have the following on my nginx.conf

events {

  worker_connections 1024;

}

http {

    map $http_upgrade $connection_upgrade {

        default upgrade;

        '' close;

    }

    # All other servers, eg: admin dashboard, client website etc

    server {

        listen 80;

        http2 on;

        server_name http://api.domain.com;

        location /api {

            proxy_pass http://host.docker.internal:5001;

            proxy_set_header Host $host;

            proxy_set_header X-Real-IP $remote_addr;

            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

            proxy_set_header X-Forwarded-Proto $scheme;

            # WebSocket support

            proxy_http_version 1.1;

            proxy_set_header Upgrade $http_upgrade;

            proxy_set_header Connection $connection_upgrade;

        }

        location /grpc {

            grpc_pass grpc://host.docker.internal:50051;

        }

    }

}

I am using nginx:alpine.

Calling grpc://host.docker.internal:50051 on postman works fine but trying to call http:api.dev-local.com/grpc wont work.

curl -I on the domain shows HTTP/1.1 regardless of setting : http2 on;.
Now I also plan to put this in a EC2 server for production, I use nginx there but I think its gonna be easier to set it up using ALB.

Any ideas on why this is not working?

[mehrdad...@gmail.com]

Standard gRPC/Protobuf servicers are by default attached to specific paths like "/ServiceName/MethodName" not under "/grpc" so you need to proxy those specific paths in nginx config

--

Mehrdad Afshari

CEO, Signeen.com