Re: ZPool on iSCSI storage not available after a reboot

On 3/12/24 15:41, Alan Somers wrote:
> On Tue, Mar 12, 2024 at 1:28 PM Dennis Clarke <dclarke@blastwave.org> wrote:
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> Yes, this looks exactly like an ordering problem.  zpools get imported
> early in the boot process, under the assumption that most of them are
> local.  Networking comes up later, under the assumption that
> networking might require files that are mounted on ZFS.  For you, I
> suggest setting proteus's cachefile to a non-default location and
> importing it from /etc/rc.local, like this:
> 
> zpool set cachefile=/var/cache/iscsi-zpools.cache proteus
> 
> Then in /etc/rc.local:
> zpool import -a -c /var/cache/iscsi-zpools.cache -o
> cachefile=/var/cache/iscsi-zpools.cache
> 

That seems to be perfectly reasonable.

I will give that a test right now.

I was messing with the previous zpool called proteus and destroyed it. 
Easy enough to re-create :

titan# gpart add -t freebsd-zfs /dev/da0
da0p1 added

titan#
titan# gpart show /dev/da0
=>        40  4294967216  da0  GPT  (2.0T)
           40           8       - free -  (4.0K)
           48  4294967200    1  freebsd-zfs  (2.0T)
   4294967248           8       - free -  (4.0K)

titan#
titan# zpool create -O compress=zstd -O checksum=sha512 -O atime=off -o 
compatibility=openzfs-2.0-freebsd -o autoexpand=off -o autoreplace=on -o 
failmode=continue -o listsnaps=off -m none proteus /dev/da0p1
titan# zpool set cachefile=/var/cache/iscsi-zpools.cache proteus
titan#
titan# ls -lapb /etc/rc.local
ls: /etc/rc.local: No such file or directory
titan# ed /etc/rc.local
/etc/rc.local: No such file or directory
a
zpool import -a -c /var/cache/iscsi-zpools.cache -o 
cachefile=/var/cache/iscsi-zpools.cache
.
f
/etc/rc.local
w
92
q
titan#

After reboot ... yes ... this seems to get the job done neatly !



root@titan:~ #
root@titan:~ # zpool list
NAME      SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP 
HEALTH  ALTROOT
iota     7.27T   321G  6.95T        -         -     0%     4%  1.00x 
ONLINE  -
proteus  1.98T  1.03M  1.98T        -         -     0%     0%  1.00x 
ONLINE  -
t0        444G  40.8G   403G        -         -     4%     9%  1.00x 
ONLINE  -
root@titan:~ #
root@titan:~ # uptime
  8:21PM  up 3 mins, 1 user, load averages: 0.02, 0.04, 0.01
root@titan:~ #

Looks good.

Thank you very much :)



-- 
--
Dennis Clarke
RISC-V/SPARC/PPC/ARM/CISC
UNIX and Linux spoken