docker compose v2 は version の key を見ていない

code:shell

$ docker compose version

Docker Compose version 2.26.0

code:sh

$ head -n1 docker-compose.yml

version: '3'

code:sh

$ docker compose build

WARN0000 /Users/ikaruga/src/github.com/ikaruga777/rails-tutorial-sample-app/docker-compose.yml: version is obsolete

docker compose コマンドは version の key をもう見ていないのです。

https://github.com/jasonacox/Powerwall-Dashboard/issues/453

https://docs.docker.com/compose/faq/

Version two of the Docker Compose command-line binary was announced in 2020, is written in Go, and is invoked with docker compose. Compose V2 ignores the version top-level element in the compose.yml file.