Hi Simon, ok thank you that's quite a simple explanation.
Greetings Vincent On 2020/06/10 16:49:20, Simon Weller <swel...@ena.com.INVALID> wrote: > Vincent, > > VM Snapshots aren't supported with Ceph as the primary storage. As you note, > when using QCOW2 files, the memory payload for the VM snapshot is included > within the QCOW2 file. Since Ceph is using raw storage, there is no where to > store that memory (at least today). > Storage based snapshots are supported on Ceph though and you can snap any > disk instance using the native Ceph snapshot functionality. > > -Si > > > ________________________________ > From: Vincent Hermes <vincenthermes2...@gmail.com> > Sent: Wednesday, June 10, 2020 9:51 AM > To: users@cloudstack.apache.org <users@cloudstack.apache.org> > Subject: KVM Snapshot with Ceph > > Hi Guys, > > so we have built a Cluster with a few CentOS7 CS Nodes with KVM as the > Hypervisor AND Ceph as Primary Storage in a hyperconverged way and we got > something interesting, maybe some of you have an idea whats up with that. As > KVM works with QCOW2 Image Format for its VMs, all of the Storage Volumes and > Templates are QCOW2 Files. However trying to take a Snapshot including RAM > ends with the error "We only support create vm snapshots from vm with QCOW2 > image". Trying a "virsh snapshot-create [vm-id]" brings us "error: > unsupported configuration: internal snapshot for disk vda unsupported for > storage type raw". The qemu.log states "-drive [...] format=raw [...]" and > the according XML file of the VM of course says the same. > > Do you have experience in getting Snapshots to work with KVM and Ceph in CS? > > Many thanks in advance and best regards from Germany > > Vincent >
