[SOLVED] 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.

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

 

[husskii]

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.

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

hi so much bbgeek
thank you for the reply, will these effect anything on the network etc when creating a clone and it has an identical Machine ID? Also is there a guide you know of that can show me how to put the custom procedure. basically most of my vms atm start of the same then during install i may add to a vm extra apps etc. so i am trying to build like a custom template for myself that i can go off giving me less work. also i am still in trial and error on my home lab, more trying to learn things and find myself installing cleaning formatting starting again..
I have collected 3 mini pc, 1 small factor, 2x pi4 and 1 SMB storage and once i am done learning and trying to work out on my setup, then I will do a final install/config. and if i can have custom templates and clones and they all be unique ID etc. I can just run off them and do a final setup install, without having to go through each one from start to finish. (which is what i am having to do now)

 

[bbgeek17]

will these effect anything on the network etc when creating a clone and it has an identical Machine ID?

I am not aware if such effect. However, it does not mean that it`s not possible. Potentially any licensing that relies on this, or DHCP server that may expect uniqueness.

Also is there a guide you know of that can show me how to put the custom procedure.

I don't know of one such guide, but it does not mean that such guide does not exist.
You can pull data from multiple places:
https://ubuntu.com/core/docs/build-an-image
https://cloudinit.readthedocs.io/en/latest/

Good luck

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

 

[husskii]

I am not aware if such effect. However, it does not mean that it`s not possible. Potentially any licensing that relies on this, or DHCP server that may expect uniqueness.

I don't know of one such guide, but it does not mean that such guide does not exist.
You can pull data from multiple places:
https://ubuntu.com/core/docs/build-an-image
https://cloudinit.readthedocs.io/en/latest/

Good luck

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

I am following a guide from Jim's Garage on youtube its a Kubernetes but he is going through step by step guide on creating a cloud-init vm setup. and i dont mind the Kubernetes setup either something new to learn
so hopefully i will know more by the end of it.. its a multi part tutorial so will keep me busy for a while.

I really appreciate you pointing me in the right direction, i feel this is what i needed to be able to clone multiple vms properly. once i see it actually done it will be easier for me to follow written documents and hopefully better understand what i am doing
Thanks Again