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

From: Alan Somers <asomers_at_freebsd.org>
Date: Sat, 17 Sep 2022 20:20:17 UTC
On Sat, Sep 17, 2022 at 2:03 PM milky india <milkyindia@gmail.com> wrote:
>
>
>
> On Sat, Sep 17, 2022 at 10:58 PM Alan Somers <asomers@freebsd.org> wrote:
>>
>> 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.
>
> > The "-s" flag should be unnecessary since your provider is already online.
> When I try to run "geli resize /dev/ada0p3.eli" it complains. So I guess options s is must ? If yes - do I need to put in the exact size down to bytes from the output of geli list ? Under "Mediasize" ?
> ---------------------------------------
> geli: Option 's' not specified.
> ----------------------------------------

Dude, it's easier just to try it, than to ask us.  Go for it.  The
worst case scenario if you get the argument wrong is that nothing
happens.