Hi Matt, sorry but I lost your answer and Gianpiero forwarded it to me. I am sure kvm nodes names are note changed. Tables where uuid are duplicated are: dataresource_providers in nova_api db compute_nodes in nova db Regards Ignazio
Il 28/Nov/2018 11:09 AM, "Gianpiero Ardissono" <gp.ardiss...@gmail.com> ha scritto: > > ---------- Forwarded message --------- > From: Matt Riedemann <mriede...@gmail.com> > Date: mar 27 nov 2018, 19:03 > Subject: Re: [Openstack-operators] Nova hypervisor uuid > To: <openstack-operators@lists.openstack.org> > > > On 11/27/2018 11:32 AM, Ignazio Cassano wrote: > > Hi All, > > Please anyone know where hypervisor uuid is retrived? > > Sometime updating kmv nodes with yum update it changes and in nova > > database 2 uuids are assigned to the same node. > > regards > > Ignazio > > > > > > > > > > _______________________________________________ > > OpenStack-operators mailing list > > OpenStack-operators@lists.openstack.org > > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators > > > > To be clear, do you mean the computes_nodes.uuid column value in the > cell database? Which is also used for the GET /os-hypervisors response > 'id' value if using microversion >= 2.53. If so, that is generated > randomly* when the compute_nodes table record is created: > > > https://github.com/openstack/nova/blob/8545ba2af7476e0884b5e7fb90965bef92d605bc/nova/compute/resource_tracker.py#L588 > > > https://github.com/openstack/nova/blob/8545ba2af7476e0884b5e7fb90965bef92d605bc/nova/objects/compute_node.py#L312 > > When you hit this problem, are you sure the hostname on the compute host > is not changing? Because when nova-compute starts up, it should look for > the existing compute node record by host name and node name, which for > the libvirt driver should be the same. That lookup code is here: > > > https://github.com/openstack/nova/blob/8545ba2af7476e0884b5e7fb90965bef92d605bc/nova/compute/resource_tracker.py#L815 > > So the only way nova-compute should create a new compute_nodes table > record for the same host is if the host/node name changes during the > upgrade. Is the deleted value in the database the same (0) for both of > those records? > > * The exception to this is for the ironic driver which re-uses the > ironic node uuid as of this change: > https://review.openstack.org/#/c/571535/ > > -- > > Thanks, > > Matt > > _______________________________________________ > OpenStack-operators mailing list > OpenStack-operators@lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators >
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