2018-02-27 (Golang/Modern Devops) Paris meetup

Files for the 2018-02-27 Docker talk of the meta (Golang/Modern Devops) Paris meetup.

Slides

Here is the infamouse Prezi presentation : https://prezi.com/p/2-kdk2x0pnfy/

⚠️ Sickness bags not provided.

Steps

1. A standard docker image with the default Golang image
2. Reordered Dockerfile to benefit cache
3. The onbuild special image
4. Choose the file to add or use .dockerignore
5. The golang:alpine image
6. Only add the binary to the image
7. Use docker multi-stage to build the binary and keep it in the final image
8. Use docker multi-stage to build multiple versions of an image
9. Create your own base image to avoid RUN steps (not cached)

Build & run

For each step, you can build the image with :

docker build -t <image name> -f <step directory>/Dockerfile .

For example :

docker build -t meetup3 -f 3.onbuild/Dockerfile .

Once built, you can run the image :

docker run --rm -ti -p 8080:8080  meetup6
# In another terminal
curl -si http://127.0.0.1:8080

For the step 8 :

# Build the production image
docker build --target=production -t meetup8:production -f 8.multiple_versions/Dockerfile .
# Build the debug image
docker build --target=debug -t meetup8:debug -f 8.multiple_versions/Dockerfile .

The debug image must be launch with :

docker run --rm -ti -p 8080:8080 -p 2345:2345 --security-opt=seccomp:unconfined meetup8:debug

Then you can remote debug with VSCode !