ogra@anubis:~/datengrab/images/snappy$ sudo ubuntu-device-flash core --channel edge --oem pi2.canonical --developer-mode -o rpi-rolling-edge.img --device raspi2_armhf rolling
[sudo] password for ogra: 
WARNING: this option should only be used to build azure images
Determining oem configuration
Starting download of pi2
4.01 MB / 4.01 MB [==================================================================================================================] 100.00 % 353.88 KB/s 
Done
Starting download of icon for package
38.95 KB / 38.95 KB [================================================================================================================] 100.00 % 259.95 KB/s 
Done
Fetching information from server...
Downloading and setting up...
38.04 MB / 38.04 MB [==============================================================================================================>_] 100.00 % 352.75 KB/s 
Installing pi2.canonical
Starting download of pi2
4.01 MB / 4.01 MB [==================================================================================================================] 100.00 % 353.48 KB/s 
Done
Starting download of icon for package
38.95 KB / 38.95 KB [================================================================================================================] 100.00 % 265.14 KB/s 
Done
Enabling developer mode...
New image complete
Summary:
 Output: rpi-rolling-edge.img
 Architecture: armhf
 Channel: edge
 Version: 29
ogra@anubis:~/datengrab/images/snappy$