Installation .iso stay connected in VMware VM

Hi,

when building VMs in VMware using the foreman-vsphere plugin, the VM
boots from a small ISO which contains an iPXE client, which in turn
downloads kernel and initramfs via http and starts the installer from
there.

Unfortunately, the ISO stays connected to the VM, which prevents the
vCenter from using VMotion to move the VM to a different server.

Is there any possibility (like an option in the JSON file posted to
foreman to build the VM) to have the ISO disconnected when the VM goes
out of build mode?

Or, alternatively, is there a possibility to boot a VM in build mode via
PXE without using an ISO file at all?

Any hints will be appreciated. Thanks.

Greetings
Marc

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