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Hello,
The 3 nodes are running Ubuntu 20.04 and using libvirt. The instance are Ubuntu or debian based. The openstack virtual network is configured with both a v4 and a v6 dhcp pool. The instance should be getting both v4 and v6 (on the same interface) but the instance that are hosted on the compute node only get v4. If i run the dhclient -6 -r the instance actually get it’s ipv6 but it’s wrongly configured with a /128 (instead of 64) and no route.

Michael

De : Lajos Katona
Envoyé le :mardi, 20 septembre 2022 09:39
À : mhazan at mandint.org
Cc : openstack-discuss at lists.openstack.org
Objet :Re: [neutron][nova][ipv6]instance on compute node not getting dhcpv6

Hi,
Do you have some more details of your environment, which backend you use? OVS?
Your VMs have both IPv4 and v6 addresses and you mean that they got IPv4 as expected?

Lajos

<mhazan at mandint.org> ezt írta (időpont: 2022. szept. 19., H, 16:19):
Hello all,

i manage a small openstack cluster installed via Ubuntu package, it has 
been upgraded since the day of Newton and currently running Victoria. it 
started as a single node with the basic services installed, later a 
dedicated storage node and compute node were added. after upgrading to 
victoria, any instance that boot on the dedicated compute node start up 
but fails to get it's global ipv6 via stateful dhcp6, only 
linklocal(fe80) ip is shown by the instance. The ipv6 is created in 
openstack, the dhcpv4 works and there are no issue if the instance boot 
on the "old" all in one node. i can manually allocate (by editing the 
instance network config file) the ipv6 config and it works. any pointer 
as to what could cause this issue ?

BR, Michael

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