So I have 6 VM's (Ubuntu 20.04) with 3 master/3 worker nodes. On the worker nodes I have attached a second 20G disk and here is where I made some assumptions... I learned the Longhorn installs at

/var/lib/longhorn

and I am thinking this is where my provisioned PV's will be created and replica's will be stored. So wanting to use those 20G disk on each, I partitioned the disk, created a logical volume out of it and then formatted it with XFS filesystem which is our standard format. I then mounted that disk at

/mnt/DATA

, created a subfolder named

longhorn

and then symlinked

/mnt/DATA/longhorn -> /var/lib/longhorn

. Is this the correct approach to use? This is the information I am failing to find anywhere including in the Longhorn docs.

The docs recommend bind mounting the path to

/var/lib/longhorn

instead of symbolically linking it: https://longhorn.io/docs/1.3.0/best-practices/#setting-up-extra-disks

I'm not familiar with bind mounting but I'm looking it up now. Do you know if my formatting the logical volume was correct or should the block device be an unformatted/raw block device?

If you as using the whole disk for longhorn, you can mount it to

/var/lib/longhorn

. It looks like the source and destination are reverse in your fstab example.

/mnt/DATA /var/lib/longhorn none bind

ll