MShekow/docker-build-speed-optimization-workshop

A small workshop that applies various optimization techniques to an example HTTP server implemented in Go

GoMIT

docker-build-speed-optimization-workshop

A small workshop that applies various optimization techniques to an example HTTP server implemented in Go

Preparation

Start Docker (Desktop)
```
docker compose up -d registry
```
- This creates the Docker network docker-build-speed-optimization-workshop_default and starts a local image registry server

docker buildx create --driver docker-container --name mybuilder --use --bootstrap --config buildkit.toml --driver-opt "network=docker-build-speed-optimization-workshop_default"

This creates your personal, container-based builder that can push to the local registry

Building and testing the image

docker buildx build --platform linux/amd64,linux/arm64 -t registry:5000/go-server:latest --push .

This builds the multi-platform image and pushes it to the local registry

```
docker compose up go-server
```
- This starts the go-server in the container
- Open http://localhost:8088 in the browser and verify that the server is running
- CTRL+C to stop the go-server again

Tutorial

Apply the following steps to improve the build speed (note: the solution can be found in the tutorial branch):

Use a smart RUN statement order to speed up installing the Go modules
Add a .dockerignore file to exclude unnecessary files from the build context
Add BuildKit cache mounts to speed up the downloading of dependencies (module cache) and building the binary (build cache)
Make use of a multi-stage build and use cross-compilation to speed up building the binary for multiple platforms