Posted 5 months ago. Visible to the public.

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
$ 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.

Check your docker-compose version

$ 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 1.28.2).

$ 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

Does your version of Ruby on Rails still receive security updates?
Rails LTS provides security patches for old versions of Ruby on Rails (3.2 and 2.3).

Owner of this card:

Emanuel De
Last edit:
3 months ago
by Emanuel De
About this deck:
We are makandra and do test-driven, agile Ruby on Rails software development.
License for source code
Posted by Emanuel De to makandra dev
This website uses short-lived cookies to improve usability.
Accept or learn more