Please attach logs to this bug.

Created attachment 973597 [details]
anaconda-tb.log

Ah, anaconda-tb.log contains details about different issues, I think. I've bumped memory of the VM to 2GB, will attach new logs.

Created attachment 973612 [details]
anaconda.log

Created attachment 973613 [details]
program.log

Created attachment 973614 [details]
storage.log

Let me know, do you need anything else.

It looks like the logical volume is being discovered and it has a known size which is not 0, so the problem is in how the kickstart data is being extended and used.

I've posted an updates image at http://mulhern.fedorapeople.org/1172172.img.

Please try f21 install again with this image and let me know how it turns out.
It is a very simple change, it looks like the code that signals the error has too broad a definition of what constitutes a missing size.

added to the anaconda boot options:

updates=https://mulhern.fedorapeople.org/1172172.img


and it works, machine imaged successfully to Fedora 21.

(In reply to Mikolaj Kucharski from comment #10)
> added to the anaconda boot options:
> 
> updates=https://mulhern.fedorapeople.org/1172172.img
> 
> 
> and it works, machine imaged successfully to Fedora 21.

Thanks!

Acked and pushed to master + RHEL7. Waiting for f22 devel cycle to push to fedora.

Actual fix went in in 2015 January. Somehow failed to update the bz.