@Dan: that's a good question about the glance legacy plugins. I don't remember why Erno needed to introduce new ones for the Interoperable Image Import workflow. They're left over from the old tasks API, which I guess can still be activated by directly creating a task, so they're not dead code. We'll need to check with Abhishek or Erno about whether the same technique can be used to patch it (I think it can). I'm not sure what the status of the Tasks API is with respect to being completely removed.
@Guillaume: I'm looking at moving the checks in cinder to convert_image() without causing regressions. Can probably do it for this vmdk issue, but not the backing_file.
@Dan: that's a good question about the glance legacy plugins. I don't remember why Erno needed to introduce new ones for the Interoperable Image Import workflow. They're left over from the old tasks API, which I guess can still be activated by directly creating a task, so they're not dead code. We'll need to check with Abhishek or Erno about whether the same technique can be used to patch it (I think it can). I'm not sure what the status of the Tasks API is with respect to being completely removed.
@Guillaume: I'm looking at moving the checks in cinder to convert_image() without causing regressions. Can probably do it for this vmdk issue, but not the backing_file.