sysutils/iocage in a NAS environment

[Kai Gallasch]

Hi.

Just read that FreeNAS 10 is going to use sysutils/iocage for managing
local jails on the NAS. That is great news and it will give iocage more
publicity and a wider user base!

I am currently testing a FreeNAS 9 as a NAS for my FreeBSD servers. Each
(FreeBSD 10) server is running between 10-50 iocage jails.

iocage's documentation states that each iocage installation needs a
zpool to run on.

So the only way I see to use a NAS for iocage deployment would be to
make use of iSCSI (block based) mounts. The NAS would offer an iscsi
target to the jailhost. When mounted, it just shows up as a block based
LUN. You then could create a zpool on this LUN and use this zpool for
iocage. (Each time the jailhost starts up, the iSCSI mount + zpool
import would have to happen automatically)

Does this approach make any sense when both performance or stability are
needed?

Is it generally adviseable to use zpools on iSCSI targets, because they
are basically iSCSI exported zvols running on top of another zpool?

Regards,
Kai.

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