[CentOS] Troubles expanding file system.

Wed Sep 1 17:15:37 UTC 2021
Stephen John Smoogen <smooge at gmail.com>

On Wed, 1 Sept 2021 at 12:42, Jeff Boyce <jboyce at meridianenv.com> wrote:
> Greetings -
>      I have tried posting this four times now, from two different email
> addresses (on the 25th, 27th, 30th, and 31st) and it never appeared.  I
> don't see it in the archives, so it appears to be getting dropped in
> transition for some reason.  I am not getting messages from the email
> system saying it is undeliverable, or is bounced; I am sending as plain
> text, not HTML, I stripped off my signature.  If this makes it through,
> someone please give me a clue why the others might not have.  But that
> is not as important as the real issue that I am trying to get addressed
> below.  Thanks for any assistance.
>      I have a Dell PowerEdge server with a CentOS KVM host (Earth) with
> one CentOS guest (Sequoia) that I am trying to expand the partition and
> filesystem on.  I have LVM logical volumes on the host system (Earth),
> which are used as devices/partitions on the guest system (Sequoia).  In
> this particular situation I have successfully extended the logical
> volume (lv_SeqEco) on Earth from 500GB to 700GB.
> 1.  Checking the disk information (lsblk) on Earth shows that the
> logical volume (lv_SeqEco) is now listed as 700GB.
> 2.  Checking disk information (lsblk) on Sequoia shows that the disk
> /dev/vde is still listed as 500GB, and partition /dev/vde1 where the
> mount point /ecosystem is located is also listed as 500GB.
> 3.  I had tried using the resize2fs command to expand the filesystem on
> /dev/vde1, but it returned with the result that there was nothing to
> do.  Which makes sense now after I checked the disk information, since
> /dev/vde on Sequoia has not increased from 500GB to 700GB.

Thanks for the long list of items of what you have done. In Fedora
Infrastructure, we used this method to resize images in the past

The guest system usually needs to have the `fdisk` , `gdisk` or
`parted` commands rerun to resize the disk to its new size.

> 4.  On previous occasions when I have done this task, I would just start
> GParted on Sequoia and use the GUI to expand the partition and
> filesystem.  A real quick and simple solution.
> 5.  The problem I have now is that the VGA adapter on my server has died
> and I have no graphical output to the attached monitor, nor to the iDrac
> console display.  So I am stuck doing this entirely by the command line
> while logged into the system remotely.
> 6.  I suspect that I need to rescan the devices on Sequoia so that it
> recognizes the increased space that has been allocated from the extended
> the logical volume.  But when I did that (command below) it came back
> with a no such file or directory.
> echo 1 > /sys/class/block/vde1/device/rescan

Not sure that would do anything.

> 7.  This server is being retired in the next few months, but I need this
> additional space prior to migrating to the new system. Can someone give
> me some guidance on what I am missing in this sequence?
> Let me know if I haven't been clear enough in the explanation of my
> systems and objective.  Thanks.
> Jeff
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Stephen J Smoogen.
I've seen things you people wouldn't believe. Flame wars in
sci.astro.orion. I have seen SPAM filters overload because of Godwin's
Law. All those moments will be lost in time... like posts on a BBS...
time to shutdown -h now.