What were you trying to do that didn't work?

Trying to create backup gpt table on install device (/dev/sda) on a system generated with image builder (tested with ova and qcow2)

What is the impact of this issue to you?

Install are not clean, we need to make some change after provisioning to have everything as expected.

Please provide the package NVR for which the bug is seen:

osbuild.noarch 141.2-1.el10_0

How reproducible is this bug?:

always

Steps to reproduce

On a RHEL10 server install image builder

create blueprint like this one

name = "RHEL9_test"
description = ""
version = "1.0.0"
modules = []
groups = []
distro = "rhel-9"
[customizations]
hostname = "myhostname"
[[customizations.user]]
name = "root"
password = "redhat123"
 

then push it and create ova or qcow2 image and deploy it to the corresponding virtualization tool. 

Then on the installation device run

sgdisk -e /dev/<device name>

Expected results

The operation has completed successfully.

Actual results

{{Warning! Secondary partition table overlaps the last partition by
2014 blocks!
Try reducing the partition table size by 8056 entries.
(Use the 's' item on the experts' menu.)
Aborting write of new partition table.}}

More information

After some investigation it appears that osbuild set First usable sector at 2048 (probably with something like

sfdisk /dev/<device name> << 'EOF'                             
label: gpt
unit: sectors
first-lba: 2048
EOF 

The consequence is that sgdisk -e will copy the whole first 2047 unusable sectors instead of just the 33 first in a standard installation.

And because osbuild is not adapting the last usable sector to "total number of sector minus 2048", the last partition is extended to the default last usable sector which is "total number of sector minus 33". That why executing sgdisk -e on this disk will generate this error.