Custom ISO for disabling system-docker bridge

Hi

This question is very much related to Setting the docker-sys Network since we are affected by the usage of 172.18.0.0/16 as bridge network on system-docker.

We resolved it at first by using cloud-config.yaml, but that became a problem when we booted a machine on a 172.18 network. Then there is a momen-22 where cloud-config.yaml need to be downloaded from an url which resolves to a 172.18 ip.

This lead us to building our own custom iso, to disable the system-docker bridge by setting “bridge: none” in os-config.tpl.yml.

Creating a image for 1.4.2 and 1.5.0 where ok, but has now failed with the 1.5.1 release.

So what is the preferred way of creating a custom iso for vmware?

I got to the point where kvm is needed?! why?!