I either haven't searched for the right thing or the web doesn't contain
the answer.
I have used the following to mount an image and now I need to know the
proper way to reverse the process.
qemu-nbd -c /dev/nbd0 <qcow2 image using lvm>
vgscan --cache (had to use --cache to get the qemu-nbd volume to
be recognized, lvmetad is running)
vgchange -ay
lvdisplay
mount <selected qemu-nbd related 'LV Path' found from lvdisplay
above> <mount point>
I made the changes I needed to make and have done the following:
umount <mount point>
lvchange -an <all qemu-nbd related 'LV Path's found from lvdisplay
above>
vgchange -an <qemu-nbd related volume>
Now what? How do I get the volume out of the list so I can use
'qemu-nbd -d /dev/nbd0' to dis-associate the image with /dev/nbd0?
vgreduce seems to be for volumes which have multiple underlying
devices. I started to use vgremove but, when it started prompting for
confirmation about removing logical volumes, I wasn't sure exactly what
it was going to do and responded 'no'.
If there is a web reference explaining this specific situation just
point me to it - I'm not opposed to reading. Thanks for the help.
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