All,

I'm having a problem with launching a volume that already exists. I'm not finding any indication why DiskFilter is saying there's not enough disk space available. what release of nova are you using.

On Mon, 2022-03-21 at 15:31 -0400, Alan Davis wrote: the disk filter has been deprecated for a number of years and removed in recent releases in favor of counting disk in placement.

This is not a new system, it's been in use for over a year and has more than 20 VM's running on it already. Creating a volume (either from image or from install iso) is my normal way of creating instances, so this isn't anything I haven't done many times.

instnaces that are booted form a volume shoudl have a flavor that requests 0 root gb if you use a flavor that request root gb the disk filter will still

Any ideas on why or what debugging steps I can take would be appreciated.

Here's the error from nova-scheduler.log

2022-03-21 15:20:22.021 16602 INFO nova.filters [req-f8909a62-723d-4128-9e68-2fe445fa861d a676762eea994d08a7ce018c3ccbb0b8 1ab386267c2b4c969d551ea763c906dc - default default] Filtering removed all hosts for the request with instance ID '59dfe21d-c527-4fd7-ad50-39c144af93fc'. Filter results: ['RetryFilter: (start: 1, end: 1)', 'AvailabilityZoneFilter: (start: 1, end: 1)', 'RamFilter: (start: 1, end: 1)', 'DiskFilter: (start: 1, end: 0)']

the retry filter ram filter and disk filter are not required in any release that has placment so if you are using ~pike or later you do not need them enabled. placment will have already valdiated ram and disk capasity and the retry filter is repleace with a set of alternate hosts that are selected when the vm is initally schduled.

vgs (yes, i know... LVM) shows plenty of space, as well

VG #PV #LV #SN Attr VSize VFree centos_stack2 1 3 0 wz--n- 74.00g 0 cinder-volumes 1 51 1 wz--n- <9.10t <3.64t

openstack says: +--------------------------------+---------------------------------------+

...

Field | Value | +--------------------------------+---------------------------------------+ attachments | [] | availability_zone | nova | bootable | true | consistencygroup_id | None | created_at | 2022-03-21T15:44:44.000000 | description | root disk for rh8.3 vm | encrypted | False | id | 3a2aab97-d49d-431c-824d-5fbdcac40fa3 | migration_status | None | multiattach | False | name | rhel83-str-root | os-vol-host-attr:host | stack2.xxxx@lvm#lvm | os-vol-mig-status-attr:migstat | None | os-vol-mig-status-attr:name_id | None | os-vol-tenant-attr:tenant_id | 1ab386267c2b4c969d551ea763c906dc | properties | | replication_status | None | size | 80 | snapshot_id | None | source_volid | None | status | reserved | type | iscsi | updated_at | 2022-03-21T19:20:20.000000 | user_id | a676762eea994d08a7ce018c3ccbb0b8 | +--------------------------------+---------------------------------------+