Re: Question about instance volumes
When you create a VM from a template then ACS doesn't copy the template to
a new root image, but creates it thin, pointing the volume to the template
as a backing store device.
пн, 23 апр. 2018 г., 8:16 Felipe Arturo Polanco <felipeapolanco@xxxxxxxxx>:
> I am seeing a behavior that I would like to ask about.
> I have some instances that instead of having a normal qcow2 disk file, have
> a qcow2 file that points to another backing store file.
> <disk type='file' device='disk'>
> <driver name='qemu' type='qcow2' cache='none'/>
> <source file='/mnt/ps4/c6a79f0b-60b2-419c-98af-6ae854f88ad1'/>
> <backingStore type='file' index='1'>
> <format type='raw'/>
> <source file='/mnt/ps4/ddc78c68-47b2-43ef-9109-4c91ebb8bda5'/>
> <target dev='vda' bus='virtio'/>
> <alias name='virtio-disk0'/>
> <address type='pci' domain='0x0000' bus='0x00' slot='0x04'
> I am reading online that this is seen when there is a snapshot of another
> disk file, but I have no snapshots, just a regular Linux server that I
> created through the Cloudstack UI.
> Any idea of why this would happen? Not all Instances have this backing
> storage file.