[PVE-User] VM storage and replication

[Alex K]

On Wed, Sep 8, 2021 at 12:32 PM nada <nada at verdnatura.es> wrote:

> hi Alex
> in case you have a limited budget now
> you may do backups local backups but it is not recommended by some cheap
> NAS ASAP
>
> temporal solution:
> 1. create some filesystem LVM/ext4 @node1 and mount at /mnt/backup
> 2. install NFS server @node1 and export /mnt/backup to node2
> 3. install NFS client @node2 and create mountpoint /mnt/backup
> 4. edit fstab @node2 example
>     node1:/mnt/backup      /mnt/backup       nfs
> defaults,noatime,bg     0       2
> 5. mount /mnt/backup
> 6. add directory to your proxmox storage via webGUI
>     or add to /etc/pve/storage.cfg example
>
> dir: backup
>         path /mnt/backup
>         content vztmpl,backup,iso
>
> after this you will have backups accessible at both nodes
> hope it will help you
>
Hi Nada, Thanx for your feedback.
I will definitely include a NAS into the final setup for exporting the
backups. I was just wondering about how I would sync local backups between
the nodes for an additional local copy and your suggestion seems a nice
work-around to me without adding any other custom scripts.

Nada


>
> On 2021-09-08 10:05, Alex K wrote:
> > Hi all,
> >
> > I have setup a dual server setup, with latest proxmox v7.x. Each host
> > with
> > its own local storage. No shared storage (CEPH, GlusterFS).
> >
> > I understand I can have VMs hosted on top LVM with qcow2 disk images or
> > on
> > top thin LVM as raw thin LVM volumes. On both cases I still keep the
> > option
> > to be able to perform VM backups. Which one is the preferred way
> > according
> > to your experience? I will try to do some quick tests on the IO
> > performance
> > between the two.
> >
> > Also, I was thinking to replicate the VMs from one host to the other. I
> > understand that for the Proxmox integrated replication feature I need
> > ZFS
> > backed storage. As I am not much into ZFS, although I really enjoy
> > FreeNAS
> > and its great features and will definitely look into it later, I was
> > thinking to prepare a custom script that would snapshot the LVM volumes
> > where the VM images reside and sync the VM disks from one host to the
> > other, using rsync, just for a local copy of them. Of course I will
> > take
> > care to have an external media also to periodically export the VMs for
> > backup purposes, though I would like to have a local copy of the VM
> > disk
> > images at the other host, readily available in case I face issues with
> > the
> > external media or one of the hosts. What do you think about this
> > approach?
> > Am I missing some other feature or better approach?
> >
> > Regrading the sync/replication of the VMs between the hosts (without
> > ZFS),
> > I was thinking also to have a dedicated local LVM volume for these
> > periodic
> > backup jobs configured within Proxmox and then the custom script to
> > just
> > rsync these backup images between the two hosts. This seems a simple
> > one
> > though it increases the storage requirements, while with the previous
> > approach with the custom script, the script would snapshot, sync to the
> > other side and remove the snapshot without keeping a redundant local
> > copy
> > of the disk image in the same host.
> >
> > Sorry for the long read.
> > Appreciate any feedback.
> >
> > Alex
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