Best configuration to create a new LXD Server

LXD
1

Hi,

I would like to recycling an old media server to LXC platerform with ZFS.

For the moment, I woud like to create this LXC’s containers:

  • MariaDB : 500 GB
  • Nexcloud : 1.5 TB of data
  • Mail server

Do I need to create separated zools to have easy LXC move possibilities?

  • 2 TB for Nextcloud on one drive

  • 1 TB for MariaDB on one drive

  • 500 GB for Mail Server on one drive

  • 500 GB partition for backup on ZFS or Ext4 ?

and install the system on 250 Go on Ext4

During some backup/restore test on empty container, I try lxc import/export commands, but did I need to make ZFS snapshot too ?

My config is:
Processor
AMD A6-3500

Memory
8 GB

HDD

  • 2 * 1 TB
  • 1 * 2 TB
  • 1 * 250GB

Regards,

2

I’m no storage guy unfortunatly but I normally set my disks up as simple as possible, no fancy raid5 or raid10’s or whatever, usually raidz1 mirror zfs for 2 disks at a time.

This would then be called zpool1

I would then split it up into datasets, something like
zpool1/lxd
zpool1/vm

Then you can give your lxd instance its own dataset to slice up using something like

zfs storage create zfs1 zfs source=zpool1/lxd

lxc launch ubuntu:20.04 mycontainer -s zfs1 -n lxdbr0

Then you can use the rest of the zfs zpool as you wish for VM’s/KVM, backups, shared folders etc.

if you have more than 2 disks then maybe create 2 zpool mirrors and move things around between them or use one zpool for backups/long term storage.

1 Like
3

Regarding backups, its usually a case of either doing a zfs replication using a tool like syncoid, either locally between zpools or to a remote zfs server, and/or doing a zfs send and pigz/tar to an exported file and then copy to backblaze, gdrive or s3fs for some external long term storage.