For the discover_hosts bug there is now a separate report in
https://bugs.launchpad.net/nova/+bug/2085135 with a fix proposed.
I'm closing this issue as not a bug as manually deleting compute node
records is out of scope of nova. The nova-manage db archive_deleted_rows
does the deletion properly.
** Changed in: nova
Status: Triaged => Invalid
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https://bugs.launchpad.net/bugs/2077070
Title:
Delete of nova-compute service fails if PCI devices
Status in OpenStack Compute (nova):
Invalid
Bug description:
Hi,
If a nova-compute service has PCI devices attached, doing "openstack
compute service delete <UUID>" looks like working, but in fact, it
doesn't delete the node from the compute_nodes. This is because if the
node has PCI devices, there's a foreign key constraint in the
compute_nodes table. Therefore, the node cannot be deleted from the
table, unless the pci_devices table is cleaned first.
As a consequence, after re-adding the node to the cluster, if someone
tries to spawn a VM on that compute node, that VM falls into error
with the message "the host isn't mapped to any cell", even if the
discover_host has been done before, which is very deceptive.
To fix this, what I had to do was:
DELETE FROM pci_devices WHERE compute_node_id='43';
DELETE FROM compute_nodes WHERE host='<host-name>';
then "openstack compute service delete <uuid>".
Later on, after doing that, restarting nova-compute and discover_host
does what one expects and everything becomes normal again.
Please note that this happened to us on a newly spawn cluster running
Caracal. We had to reinstall the compute node because of hardware
issue, and this lead to the above.
Cheers,
Thomas Goirand (zigo)
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