we deprecated *scenario.img_dir* option in Tempest by this patch [1]. *scenario.img_file* should contain the full path of an image from now on.
However, to make the transition easier for all the Tempest dependent projects, Tempest currently accepts both behaviors - the old where the path to an image consisted of *scenario.img_dir* + *scenario.img_file* and the new one where *scenario.img_file* contains the full path to an image. It will be accepting both ways for one whole release - 25.
I proposed patches to projects I found they use scenario.img_dir option, see this link [2]. If you maintain a project from the list [2], please review. If your project somehow uses scenario.img_dir or img_file option and is not in the list [2], please make appropriate changes.
Regards,
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