'NfsDriver' object has no attribute 'manage_existing_get_size'

[Ilya Popov]

It isn't possible to get volume on external NFS share under cinder management.

When one issue cinder manage command = something like:

cinder manage --id-type source-name --volume-type __DEFAULT__ --name nfs-botvol volumes:volumes@nfs-1#nfs-1 volume-5bae4ec0-ead2-4ca6-b931-1c04f949f554

Error message appears in cinder-volume log:

...
ERROR oslo_messaging.rpc.server File "/usr/lib/python3.6/site-packages/cinder/volume/flows/manager/manage_existing.py", line 55, in execute
ERROR oslo_messaging.rpc.server size = self.driver.manage_existing_get_size(volume,
ERROR oslo_messaging.rpc.server AttributeError: 'NfsDriver' object has no attribute 'manage_existing_get_size'
...

[Sofia Enriquez (lsofia-enriquez)]

Greetings Ilya Popov,
I did a quick check and it looks like the method is missing in the generic nfs driver.
Are you using the generic nfs driver? if not, do you mind sharing which nfs related backend are you using?
Regards,
Sofia

[Ilya Popov (ilya-p)]

Hello, Sofia !

Thank you for your attention.

I suppose I'm trying to use general NFS driver over openstack Ussuri, basic configuration info available here:

https://docs.openstack.org/cinder/ussuri/admin/blockstorage-nfs-backend.html
https://docs.openstack.org/cinder/ussuri/configuration/block-storage/drivers/nfs-volume-driver.html

In cinder.conf there is smth like:

volume_driver = cinder.volume.drivers.nfs.NfsDriver

in nfs.py NfsDriver are based on remotefs.RemoteFSSnapDriverDistributed, and class remotefs.RemoteFSSnapDriverDistributed doesn't have manage_existing() and manage_existing_get_size().

By the way class RemoteFSManageableVolumesMixin, located at the same remotefs has the neded methods manage_existing() and manage_existing_get_size()

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/cinder/+/819089