Just to close this thread, with the help of Sylvain I updated the nova_api database and added the missing cell_id to the pending instances: MariaDB [nova_api]> update instance_mappings set cell_id='3' where instance_uuid='0453a7e5-e4f9-419b-ad71-d837a20ef6bb'; The cell_id can be found in the nova_api.cell_mappings table (unfortunately not in the output of 'nova-manage cell_v2 list_cells'). After that I could successfully delete the pending instances. Thank you for you quick help (especially Sylvain), I appreciate it! Eugen Zitat von Dan Smith <dms@danplanet.com>:
Thank you. I tried this (didn't produce any output):
control01:~ # nova-manage cell_v2 map_instances --cell_uuid 00000000-0000-0000-0000-000000000000
But the instance still can't be removed or reset:
control01:~ # openstack server delete amphora-0ee32901-0c59-4752-8253-35b66da176ea No server with a name or ID of 'amphora-0ee32901-0c59-4752-8253-35b66da176ea' exists.
Ack, and I see you said that the instance was mentioned in instance-mappings anyway in your original post, my mistake. So perhaps it does already have a mapping. Without debug logs and database dumps in a bug it'll be hard to really pursue that further.
--Dan