Backup to zfs pool mounted on host?

mrchip

Hello & thanks anyone who can help
Setup:

XCP-NG "Main" with multiple VM's including XO-CE
XCP-NG "Backup" (XCP-NG installed on 512GB SSD, 3 X 1TB drives configured as zfs pool at /mnt/zfs - mounted/viewable as local Storage Repository as 3.5TB)

GOAL: Backup the VM's from "Main" to the "Backup" /mnt/zfs Storage Pool .

Problem: I went into Settings/Remotes and created "Local" and the mount point to /mnt/zfs. It accepted that but assigned it a small size of 9.74 GiB Avail. Is there a way for it to have access to the whole 3.5TB the SR sees?

Do I need to install smb share on the "Backup" host then in XO-CE point to the share mount to access the full pool?

BTW: not sure if this is you or not but in https://xcp-ng.org/docs under storage-zfs there is a dead link to "http://www.zfsbuild.com/"
Sadly this is the most help I'm able to contribute but hey at least I read the manual

olivierlambert

Hi,

The BR/remote is from Xen Orchestra perspective, not the host. Also, you should NOT backup anything to the host your are using, it defeats the very purpose of backups

mrchip

Thanks @olivierlambert
Just to confirm 1. "Main" and 2. "Backup" are 2 physically different machines. Both running xcp-ng

Ultimately I would like to backup the vm's on the physical device 1. "Main" saving it to the physical device 2."Backup"'s zpool drive at /mnt/zfs/

How would I do that?

Also correct...I am not backing up to the same physical media that the vm is on.

xcp-ng zfs pool.PNG

olivierlambert

If your target is a SR (and NOT a BR), then what you do is not called "Backup" in XO, but Replication (full or incremental).

Target -> Backup mode:

SR -> Replication (you can use it with retention to have a kind of backup too)
BR (Backup Repository or "remote") -> Backup

Both can be full or incremental.

Note: you CAN'T and shouldn't use a host as a BR. A BR must be any NFS/SMB/S3 capable operating system, as long it's not XCP-ng.