Issues Cloning A New VM, Machine ID: stays the same.

[husskii]

Hi I am trying to clone a ubuntu vm and with each vm i am changing the vm id, ip, hostname and so on. but when i run hostnamectl i notice that on all of my vms they have the same Machine ID:
my Boot ID changes but not the Machine ID and i dont know if this would be an issue somewhere later on or not. and i am unsure how to get this to change. This also happens if i backup my vm and create a new machine from the backup.

Any advice would be great.

thanks

 

[bbgeek17]

Hi @husskii ,
There are two types of clones in PVE: full and thin. Both are an identical copy bit-by-bit of the original VM.
MAC and VMID changes are controlled by PVE. The IP/Hostname could also be controlled externally, ie via PVE or DHCP.
The boot-id change is expected on every boot, whether it's a clone or the same VM.

The Machine-ID will not change unless you put a procedure in place to do so. At scale you would do it with Cloud-Init: https://cloudinit.readthedocs.io/en/latest/reference/cli.html#clean

You could also put a systemd startup task that changes the machine-id based on some condition, i.e. hostname change.

In short, unless you are using a properly prepared template (for example the official cloud image of Ubuntu) or a custom procedure, the behavior you are seeing is normal.

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