This patch is specific and work only with dnsmask static lease. If we try to allocate an existing leased ip to a new mac, we need to purge first the lease.
This patch is doing it directly in dhcp reply phase. I have made a deb with the patch for testing: https://mutulin1.odiso.net:/dnsmasq-base_2.89-1_amd64.deb ex: guest ask for ip 192.168.2.10 with mac 12:45:6f:39:c2:a6 Nov 15 22:45:05 formationkvm3 dnsmasq-dhcp[846333]: DHCPDISCOVER(vnetpve) 192.168.2.10 12:45:6f:39:c2:a6 Nov 15 22:45:05 formationkvm3 dnsmasq-dhcp[846333]: DHCPOFFER(vnetpve) 192.168.2.10 12:45:6f:39:c2:a6 Nov 15 22:45:05 formationkvm3 dnsmasq-dhcp[846333]: DHCPREQUEST(vnetpve) 192.168.2.10 12:45:6f:39:c2:a6 Nov 15 22:45:05 formationkvm3 dnsmasq-dhcp[846333]: DHCPACK(vnetpve) 192.168.2.10 12:45:6f:39:c2:a6 testovn1 remove remove nic from guest create a new nic in another guest, 192.168.2.10 is allocated to new mac 12:45:a3:ed:c8:36 we write ether file and reload dnsmasq Nov 15 22:45:53 formationkvm3 systemd[1]: Reloading dnsmasq@simpve.service - dnsmasq (simpve) - A lightweight DHCP and caching DNS server... Nov 15 22:45:53 formationkvm3 dnsmasq[846333]: cleared cache Nov 15 22:45:53 formationkvm3 dnsmasq-dhcp[846333]: read /etc/dnsmasq.d/simpve/ethers Nov 15 22:45:53 formationkvm3 systemd[1]: Reloaded dnsmasq@simpve.service - dnsmasq (simpve) - A lightweight DHCP and caching DNS server. but the old mac:ip is still in lease memory of dnsmasq process the guest is doing a dhcp query here the patch: we purge the old lease Nov 15 22:45:59 formationkvm3 dnsmasq-dhcp[846333]: workaround - pruning old lease then the guest is able to retrieve the ip. Nov 15 22:45:59 formationkvm3 dnsmasq-dhcp[846333]: DHCPDISCOVER(vnetpve) 192.168.2.10 12:45:a3:ed:c8:36 no address available Nov 15 22:46:02 formationkvm3 dnsmasq-dhcp[846333]: DHCPDISCOVER(vnetpve) 192.168.2.10 12:45:a3:ed:c8:36 Nov 15 22:46:02 formationkvm3 dnsmasq-dhcp[846333]: DHCPOFFER(vnetpve) 192.168.2.10 12:45:a3:ed:c8:36 Nov 15 22:46:02 formationkvm3 dnsmasq-dhcp[846333]: DHCPREQUEST(vnetpve) 192.168.2.10 12:45:a3:ed:c8:36 Nov 15 22:46:02 formationkvm3 dnsmasq-dhcp[846333]: DHCPACK(vnetpve) 192.168.2.10 12:45:a3:ed:c8:36 testovn1 Alexandre Derumier (1): purge old ip-mac lease on dhcpreply src/rfc2131.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) -- 2.39.2 _______________________________________________ pve-devel mailing list pve-devel@lists.proxmox.com https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
