golang-srv-basic

golang-srv-basic

The goal of this project is for me to learn about golang by creating a JSON API server, mimicking an auction site. It is using the native net/http library for routing and PostgreSQL as the database for persistently storing all the data.

environment setup

For creating the test environment I've been using podman to run both the backend application and the database instance. Rather then building HTTP rate-limiting and timeouts into the application, my plan is to run HAProxy in front of the backend application and do all the traffic-policing in the load-balancer configuration.

Pull each necessary container image, create a separate network and pod, where each container will run.

$ podman image pull haproxy:lts-alpine
$ podman image pull postgres:16-alpine
$ podman network create appl
$ podman pod create -n appl --network appl
$ podman container run -d -t --pod appl --network appl --name db -e POSTGRES_PASSWORD=${APPL_POSTGRES_PWD} -e POSTGRES_DB=appl postgres:16-alpine

Building the container image for the application

$ podman image build -t appl -f scripts/Containerfile_appl .

Running the custom image file with the golang binary (with port exposed until the haproxy config is ready):

$ podman container run -d -t --pod appl --network appl --name appl -e APPL_POSTGRES_DSN="postgres://appl_role:${APPL_ROLE_POSTGRES_PWD}@db/appl?search_path=appl" -p 4000:4000 localhost/appl:latest

load-balancer configuration

TODO