Thanks for all the feedback, it was very useful.
My plan for now, regarding GCE:
1. enable serial console in GRUB
2. add DefaultPackages plugin
3. make more generic NTP plugin
4. maybe generate better name for packed image than image.tar.gz
Then I'll look into kpartx, image minimization, and development
branch, in no particular order. It seems that there are some
gems I've missed, so more code reading is in order.
Thanks for all the tips!
Tomasz Rybak GPG/PGP key ID: 2AD5 9860
Fingerprint A481 824E 7DD3 9C0E C40A 488E C654 FB33 2AD5 9860