Re: Need help with live system expansion (zfs+geli)

From: Alan Somers <asomers_at_freebsd.org>
Date: Sat, 17 Sep 2022 18:57:53 UTC
On Sat, Sep 17, 2022 at 12:52 PM milky india <milkyindia@gmail.com> wrote:
>
>
>
> On Sat, Sep 17, 2022 at 10:43 PM Alan Somers <asomers@freebsd.org> wrote:
>>
>> On Sat, Sep 17, 2022 at 12:31 PM milky india <milkyindia@gmail.com> wrote:
>> >
>> > Sorry about that, again - I'm not sure what you mean by bottom-post vs top-post.
>> >
>> > Be that as it may - I read the geli man page. I was specifically warned against using "geli resize" since it may not work as expected https://forums.FreeBSD.org/threads/how-to-extend-zfs-geli-encrypted-disk-space-not-showing.86447/post-581642
>> > Is this advise wrong?
>> > > "The geli has autoresize flag which will handle the new provider size after gpart resize command."
>> > followed by
>> > > You are right, no geli resize needed.
>> >
>> > What would be the correct sequence of commands to fix this - Simply "geli resize" ? (the -s option seems to be additional, will it figure it out without providing s?)
>> >
>> > On Sat, Sep 17, 2022 at 10:20 PM Alan Somers <asomers@freebsd.org> wrote:
>>
>> top-posting is where you insert your reply above the previous email.
>> Bottom posting is where you insert your reply below it, like I'm
>> doing.  The forum user said that you shouldn't need to run "geli
>> resize" because the AUTORESIZE flag is on.  But as you can see from
>> your "geli list" output, it's actually off.  So you need to run "geli
>> resize".  The "-s" flag should be unnecessary since your provider is
>> already online.  At any rate, you can try it both ways.  You might
>> want to make a copy of /var/backups/ada0p3.eli, just in case you make
>> a mistake.
>
> Thanks - I hope I am bottom posting this as was expected of me.
>
> So if I understand correctly the AUTORESIZE flag is present for adaop2 and NOT for adap3 (which is the partition we are concerned about) - hence the advice given to not use "geli resize" isn't applicable here. Am I understanding this correctly?

Yes

>
> > So you need to run "geli resize"
> Is this the only command that I need to run to resize my geli partition?

Yes

>
> > The "-s" flag should be unnecessary since your provider is
> already online.
> Ok thanks.
>
> >You might want to make a copy of /var/backups/ada0p3.eli, just in case you make a mistake.
> Don't have the luxury of backup currently.

Um, ok.  I can't guess why you aren't able to do that, but it isn't
strictly necessary.

>
> I suppose at the end of it - if this works - "geli list" would reflect the size to be 458G? (vs 290G currently)
> And that's the output I can trust to have solved the issue - or is there more to it?

Yes.