FreeBSD CTL support for ZFS-over-iSCSI to replace deprecated ISTGT?

Dec 4, 2023
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Hello,

Of the several various backends PVE supports for ZFS-over-iSCSI, on FreeBSD there is only istgt, which has been largely superseded by ctld since FreeBSD 10.1 (and we're now on version 15.1) and the end is therefore in sight for istgt.

A patchset was sent to the pve-devel mailing list in April to add support for CTL to Proxmox, but there seems to have been little movement since then.

FreeBSD's stability and renowned support for ZFS makes it the ideal candidate for a storage server (at least until Proxmox Storage Server is released! ;)) and thus I humbly suggest that someone take a look at said patchset with a view to integrating it with Proxmox VE.

This is made much more important by the fact that there was apparently some regression breaking istgt somewhat recently. In addition, as of FreeBSD 15 it supports NVMe-oF.

Does anyone have any input on this topic?

Thanks in advance!
 
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I don't know of any plans for a storage server, the referenced post doesn't mention anything to it. Do you know more than me?
 
Just the thought of using `ctld` gives me a headache, so I don't think it's a good idea to use it at all. It probably won't be of any use.

Why? You'll find out if you look into it.