Add cleanup script

[sdavids]

Hi,

please add a cleanup script to your repo.

After finishing the course one should be able to easily get rid of everything.

The easiest way would be to label all your images, volumes, and networks.

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Open Container Initiative - Pre-Defined Annotation Keys

Dockerfile - LABEL Compose file / Networks / labels Compose file / Volumes / labels Compose file / Services / labels

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Dockerfile

LABEL org.opencontainers.image.vendor="io.diveinto"

docker-compose.yml

networks:
  diveinto.io:
    name: diveinto.io
    labels:
      org.opencontainers.image.vendor: io.diveinto

You currently use anonymous volumes, so you might want to convert them to named volumes with a label and/or you might want to update your README:

https://github.com/spurin/diveintoansible-lab/blob/b9205dff5607cbc08420338fc0b97e14d8211439/README.md?plain=1#L191

⇒

docker-compose rm -v

docker compose rm / options

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Instead of (in addition to) org.opencontainers.image.vendor you might want to use your own label io.diveinto.docker.group="diveintoansible-lab" for example.

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This is how the cleanup script could look like:

#!/usr/bin/env sh

set -eu

readonly label="org.opencontainers.image.vendor=io.diveinto"

docker-compose rm -v

docker container prune --force --filter="label=${label}"

docker volume prune --force --all --filter="label=${label}"

docker image prune --force --all --filter="label=${label}"

docker network prune --force --filter="label=${label}"

docker image prune - filtering

[spurin]

Thanks for your feedback and insight @sdavids - appreciated.

We use host volume mounts for persistence and the ability to edit files locally, that said though it's not used that often even though it's a feature.

I've been considering removing this and may switch to standard volumes. This is the only variable for me in this feedback, the rest of it are logical improvements.

Again, thanks for your input on this

[mvtab]

I know it's not optimal, but since the only problems are the images and local volumes, you can cleanup like this, while the compose setup is running and you are in the lab root directory:

DIVEINTO_IMAGES=$(docker compose images -q)
docker compose down
docker rmi ${DIVEINTO_IMAGES}
rm -rf ./ansible_home

This will delete all the related images and all the local volumes of the lab. Save your data first, if needed.

[spurin]

Love that approach! It's slick 🙏