Updating authentication for a Ceph (RBD) disk in a live domain
Is it possible to update and change the <auth/> for an RBD network disk while the
domain the disk is attached to is running and without detaching/reattaching the disk?
For example if I have a disk attached like the following:
<disk type='network' device='disk'>
<driver name='qemu' type='raw'/>
<auth username='someuser'>
<secret type='ceph' usage='someuser key'/>
</auth>
<source protocol='rbd' name='somepool/someimage'>
<host name='127.0.0.1' port='3300'/>
</source>
<target dev='sdd' bus='scsi'/>
<alias name='scsi0-0-0-3'/>
<address type='drive' controller='0' bus='0'
target='0' unit='3'/>
</disk>
If I want to change the auth to
<auth username='someotheruser'>
<secret type='ceph' usage='someotheruser key'/>
</auth>
can I do that without either attaching/detaching the disk or stopping/restarting the
domain?
I've tried `virsh update-device domain disk.xml --live --persistent` using xml
identical to the current disk except for the auth and it says "Device updated
successfully" but when I check the domain with `dumpxml` I can still see the original
auth settings for the disk.