root disk for instance
it's always glance that serves the images, it just depends on how you
decide to create the instance, ephemeral or persistent disks. You can
find more information about storage concepts in .
If I'm not completely wrong, since Newton release the default in the
Horizon settings is to create an instance from volume, so it would be
a persistent disk managed by cinder (the volume persists after the
instance has been deleted, this is also configurable). The image is
downloaded from glance into a volume on your volume server.
If you change the Horizon behavior or if you launch an instance from
the cli you'd get an ephemeral disk by nova, depending on your storage
backend this would be a local copy of the image on the compute node(s)
or something related in your storage backend, e.g. an rbd object in
Does this clear it up a bit?
Zitat von Jyoti Dahiwele <jyotishri403 at gmail.com>:
> Dear Team,
> Please clear me my following doubts.
> When I use image from source option and mini flavor to create an instace,
> from which storage pool instance will get root disk ? From cinder or glance?