How to fix: Version in "./docker-compose.yml" is unsupported
When running an older version of
docker-compose you might see the following error:
ERROR: Version in "./docker-compose.yml" is unsupported. You might be seeing this error because you're using the wrong Compose file version. Either specify a supported version (e.g "2.2" or "3.3") and place your service definitions under the `services` key, or omit the `version` key and place your service definitions at the root of the file to use version 1. For more on the Compose file format versions, see https://docs.docker.com/compose/compose-file/
$ cat ./docker-compose.yml version: '3.3' ...
You can fix this issue by upgrading docker-compose to the newest version (just download the new script from the install section). Make sure you uninstall the any previous apt package before coping the script via curl
sudo apt remove docker-compose.
$ docker-compose --version docker-compose version 1.17.1, build unknown $ docker-compose version docker-compose version 1.17.1, build unknown docker-py version: 2.5.1 CPython version: 2.7.17 OpenSSL version: OpenSSL 1.1.1 11 Sep 2018
Notice that the
--version output still might references to the old version (maybe some bug in
$ docker-compose version docker-compose version 1.28.2, build 67630359 docker-py version: 4.4.1 CPython version: 3.7.9 OpenSSL version: OpenSSL 1.1.0l 10 Sep 2019 $ docker-compose --version docker-compose version 1.17.1, build unknown