ERROR Failed to validate /path/to/my/molecule.yml

[robin-checkmk]

I might have missed the memo, but I can find no way to get molecule to actually tell me, why exactly it fails to validate my molecule.yml.
Is this intended, or did I miss something? It would be very helpful to at least get a sense of what fails.

In my case, if happened after the update from 26.7.8 to 26.7.15. So I wasn't expecting breakage and I did not change my molecule.yml.
So I went through commenting out most of the file and then line by line commenting back in the different config blocks.
Turns out I was using cgroupns: host to work around some Docker/Podman issue back in the day. I removed the key and the validation succeeds.
I am still checking, if and why cgroupns: became obsolete, but the point of this issue is, that needed to hunt for this finding way too long.

Thanks for any insights and help!

[truestory1]

might be related to #341
see schema

[robin-checkmk]

Thanks for the reference!
I was following that discussion as well, but it should not be related logically.
And even if it is, my main point would still be that the validation should be more verbose.

[x241c297f]

PSA: Everybody who still needs cgroupns_mode: host use

extra_opts:
      - "--cgroupns=host"

instead.