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

Image mode kickstart installation using a locally-stored (embedded in the boot ISO) OCI archive container image fails due to insufficient space in the root filesystem (/var/tmp in the log):

17:34:53,747 INF program: Running... ostree container image deploy --sysroot=/mnt/sysimage --image=/run/install/repo/oci.img --transport=oci-archive --no-signature-verification
17:34:58,348 INF program: error: Performing deployment: Creating importer: failed to invoke method OpenImage: failed to invoke method OpenImage: creating temp directory: untarring file "/var/tmp/container_images_oci2635607030": write /var/tmp/container_images_oci2635607030/blobs/sha256/9f722a0378ba668fec318efc869a77d0150e57c733ed723cff5a965ea63e8cc0: no space left on device
17:34:58,349 DBG program: Return code: 1

Deployment of the OCI archive image works on RHEL-9.5 with 2.5 GiB of RAM and RHEL-9.4 with 2 GiB of RAM, however on RHEL-9.6, it fails no matter what amount of memory is available.

In my case my embedded image occupied 823 MiB on RHEL-9.4 and 926 MiB on RHEL-9.6; root filesystem had 956 MiB available on RHEL-9.4 and 740 MiB on RHEL-9.6.

What is the impact of this issue to you?

It's not possible to deploy a bootc container image (embedded in the boot ISO).

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

anaconda-34.25.5.16-1.el9

How reproducible is this bug?:

Always.

Steps to reproduce

1. Pull and save the bootc container image:
   podman pull $rhel-bootc-image
   podman save --format oci-archive -o oci.img
2. Embed it into a RHEL-9.6 boot ISO:
   mkksiso -a oci.img original-boot.iso new-boot.iso
3. Prepare a kickstart file using the embedded OCI image:
   ...
   ostreecontainer --no-signature-verification --transport=oci-archive --url=/run/install/repo/oci.img
4. Start system installation using the prepared ISO and kickstart.

Expected results

Installation is successful.

Actual results

Installation fails due to insufficient space on the root filesystem.