[PVE-User] VM storage and replication

Konold, Martin martin.konold at konsec.com
Wed Sep 8 12:09:24 CEST 2021


while I highly recommend PBS I made good experience with using CIFS 
instead of NFS for performing backups to a central NAS.

ppa. Martin Konold

Martin Konold - Prokurist, CTO
KONSEC GmbH -⁠ make things real
Amtsgericht Stuttgart, HRB 23690
Geschäftsführer: Andreas Mack
Im Köller 3, 70794 Filderstadt, Germany

Am 2021-09-08 11:25, schrieb nada:
> 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
> 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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>> pve-user at lists.proxmox.com
>> https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-user
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