Re: How to Best Shrink Volume

Granwille Strauss Mon, 04 Sep 2023 00:19:24 -0700

Thank you. Can you confirm if this behaviour is expected? Or am I experiencing a bug?


On 9/4/23 09:00, Wido den Hollander wrote:

Op 04-09-2023 om 08:20 schreef Granwille Strauss:
Hi
I managed to resize the VM itself back to 60 GB via live/recovery method. However, now in Cloudstack it still says the volume remains 120 GB and when I want to shrink it I am presented with the errors from my previous reply. Is there a way around this? Such as making a database change. Also, is this the expected behaviour for a KVM host?
This is recorded in the table 'volumes'. If you decrease the size to 60GB there is should show properly.
Wido
On 9/2/23 11:22, Granwille Strauss wrote:
Hi Wei

It seems you're right you cannot shrink the volume in Cloudstack:
Failed to resize volume operation of volume UUID: [eec8285e-8715-441b-b418-b71b231f1bab] due to - Unable to shrink volumes of type QCOW2
Going from existing size of 128849018880 to size of 64424509440 would shrink the volume.Need to sign off by supplying the shrinkok parameter with value of true.
On 9/2/23 10:37, Wei ZHOU wrote:
Hi Wido,

Does it work with kvm ?

my suggestion would be
- create a new vm with 60GB
- copy the data using `rsync`

-Wei
On Sat, 2 Sept 2023 at 08:25, Wido den Hollander<w...@widodh.nl> wrote:
Hi,
Yes, you should make sure the filesystem and partitions are within the
to be set new boundaries.

Once that's done you can shrink the volume.

I would recommend:

- Shrink EXT4 + Partitions to 59GB
- Shrink volume to 60GB
- Grow EXT4 + Partitions to 60GB

The step to 59GB is to prevent that by calc mistake you chip off the
last portion of your filesystem.

Wido

Op 01-09-2023 om 16:29 schreef Granwille Strauss:
Hi Guys

Anyone willing to assist me with a quick one. What's the best and
recommended way to shrink a VM volume via UI? The VM volume was first 60 GB, we then expended it to 120 GB and increased it in the VM via parted. I now want to take it back to 60GB. How do I proceed? Do I first shrink the ext4 in the VM first then proceed to shrink the volume in Cloudstack
UI by selecting also the "Shrink OK" option? Detailed steps would be
appreciated, please.

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Re: How to Best Shrink Volume

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