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Event-Driven Architecture in Golang

Adding a Reverse Proxy to the Compose Environment

Explore how to add a reverse proxy using Nginx to route requests in a microservices environment orchestrated with docker-compose. Understand how to configure gRPC connections properly by setting service addresses via environment variables. This lesson helps you implement infrastructure changes that allow multiple microservices to operate cohesively and prepares you for deploying applications to the cloud.

We'll cover the following...

We can quickly set up a reverse proxy using Nginx, a popular web server, reverse proxy, and load balancer application. We only need to set up a reverse proxy today, and thankfully, it is going to be quite easy.

Configuring an Nginx reverse proxy for microservices

  • First, we define a configuration file for the application called /docker/nginx.conf:

worker_processes 1;
events { worker_connections 1024; }
http {
    sendfile on;
    
    upstream docker-baskets {
        server baskets:8080;
    }
# ... plus upstream blocks for each other microservice
server {
    listen 8080;
    location /api/baskets {
        proxy_pass     http://docker-baskets;
        proxy_redirect off;
    }
    location /baskets-spec/ {
        proxy_pass     http://docker-baskets;
        proxy_redirect off;
    }
# ... plus location block pairs for each other microservice
# then one more location block for the swagger-ui files
    location / {
        proxy_pass     http://docker-baskets;
        proxy_redirect off;
    }
}
Application configuration file

We have only included the baskets microservice as an example in the configuration file example, but each microservice would need to have an upstream configuration and a pair of location configurations so that the reverse proxy could properly redirect the requests to where they need to go. A final location block is used to serve the Swagger UI from any microservice.

  • Secondly, we need to remove the port configurations for each microservice and add the reverse proxy as a new service to the ...