Comment # 15 on bug 1177900 from Harish Karumuthil

(In reply to Fabian Vogt from comment #14)
> I don't think booting .isos that way is supported by kiwi.

It is supported by `dracut` . Please see their documentation here
https://github.com/dracutdevs/dracut/blob/master/man/dracut.cmdline.7.asc#iso-scanfilename 
This same method will work for Opensuse-Leap, Fedora & Ubuntu live cd images. (
ubuntu uses different system but kernel parameter is same )

Also. it will work for Tumbleweed also. For that we need to do the following.
1. Boot the ISO with above config.
2. System will start booting, but it will drop into a emergency shell.
3. Then run the command `udevadm trigger`
4. Exit the emergency shell.
5. Simply exit all other upcoming emergency shell prompts.

You can see successfully running Live OS