[pve-devel] [RFC cluster/manager/network 0/6] Add support for DHCP servers to SDN

[Stefan Hanreich]

On 9/13/23 15:21, DERUMIER, Alexandre wrote:
> Can't we have simply an infinite lease time,
> and simply remove leases manually from dhcp + delete ip from ipam at vm
> stop/delete ?

Wouldn't this cause problems if we remove the lease at stop?

* VM 1 gets IP X via DHCP on start

* We stop VM 1 and remove the lease for IP X from the IPAM

* VM 2 starts some time after and we reserve IP X for it

* We restart VM 1 and reserve some other IP Y, but the VM will never 
send a DHCP request to our DHCP server again, since it is convinced that 
it still owns IP X (since we told the VM that the IP is forever theirs). 
But VM 2 now also uses IP X.