nocloud-wurscht - A cloud-init metadata server for those who couldn’t care less.
Running cloud images locally and just wanna SSH in as root? This is for you.
Fire up the server (it listens on port 7070) and tell cloud-init where to look.
Something like this on your kernel command line ds=nocloud;s=http://192.168.7.1:7070/
That'll set the root password to linux and let you log in over SSH.
Meant for test labs and quick setups where security isn't a thing.