Personal and internal use is excluded completely and are always permitted.
I mean yeah but that doesn't sound like any of the interesting cases.
Canonical has made it crystal clear that a solution using overlayfs on top of the official ubuntu image is 100% legit and as such always permitted.
No, certain Canonical employees have said that Docker images that inherit from the official Ubuntu image are fine. They haven't pointed to anything in the policy that permits this, they haven't said that this is true of the general case, and they haven't made it clear that this is an official position. There's probably still enough to claim estoppal in the Docker case, but outside that I think you're on your own.
Re: Is that so ?
I mean yeah but that doesn't sound like any of the interesting cases.
No, certain Canonical employees have said that Docker images that inherit from the official Ubuntu image are fine. They haven't pointed to anything in the policy that permits this, they haven't said that this is true of the general case, and they haven't made it clear that this is an official position. There's probably still enough to claim estoppal in the Docker case, but outside that I think you're on your own.