Remove version declaration in docker-compose/*.yml files

[bschmalhofer]

With Docker 26.0.0 I get the following warning when starting up die OTOBO containers:

WARN[0000] /home/bernhard/devel/OTOBO/docker/otoelfnull-84/docker-compose/otobo-base.yml: version is obsolete WARN[0000] /home/bernhard/devel/OTOBO/docker/otoelfnull-84/docker-compose/otobo-override-https.yml: version is obsolete WARN[0000] /home/bernhard/devel/OTOBO/docker/otoelfnull-84/docker-compose/otobo-selenium.yml: version is obsolete

Those warnings are harmless but still irritating. According to https://docs.docker.com/compose/compose-file/04-version-and-name/ the version declaration can safely be removed.

The relevant code line is: https://github.com/RotherOSS/otobo-docker/blob/4d20e2d433c9655e54182172e52277b4982c92c2/docker-compose/otobo-base.yml#L9

[bschmalhofer]

The version declaration was removed in rel-10_0. The changes were merged into rel-10_1 and rel-11_0. Starting and stopping containers still work for the three branches. Closing this issue.

[bschmalhofer]

There had been problems with 'docker compose' version 1.25. Needs to be investigated. First let's revert the change.

[bschmalhofer]

I tested the behavior, when version: '3.3'is not declared with different versions of Docker Compose. The only case where this is a problem seems to be the standalone Docker Compose 1.25. This happens to be the default version that is installed in Ubuntu 20.04. The error is about

  db:
    image: ${OTOBO_IMAGE_DB:-mariadb:10.5}
    user: mysql:mysql

Setting a default value, that is mariadb:10.5, is not supported without declaring version: '3.3'. As Ubuntu 20.04 is supported by OTOBO the workaround 5588594 has to be kept.

A remaining problem is that the tag rel-10_0_10 points to a commit where version: '3.3' has been removed. Therefore that tag will be moved to the current HEAD of the rel-10_1 branch.

TODO:

• [x] check the situation in the rel-10_0 branch

[bschmalhofer]

Moved the tags:

• rel-10_1_10: https://github.com/RotherOSS/otobo-docker/releases/tag/rel-10_1_10
• rel-10_0_21: https://github.com/RotherOSS/otobo-docker/releases/tag/rel-10_0_21

[bschmalhofer]

Looks like the fix worked. Closing this issue.