Image Builder compose fails with error subprocess.CalledProcessError: Command qemu-img convert returned non-zero exit status 1

Issue

• Composing an image for output in .vhd format fails and displays the following error in the compose logs.

  # composer-cli compose logs 8af2084e-54b5-432e-a641-8c313366c856
  8af2084e-54b5-432e-a641-8c313366c856.tar: 43.50 kB
  
  # tail -n 20 logs/osbuild.log
  Stage: vpc:0-org.osbuild.qemu
  null
  
  Output:
  [/usr/lib/tmpfiles.d/journal-nocow.conf:26] Failed to resolve specifier: uninitialized /etc detected, skipping
  All rules containing unresolvable specifiers will be skipped.
  Failed to create file /sys/fs/selinux/checkreqprot: Read-only file system
  qemu-img: error while writing sector 7166984: No space left on device
  Traceback (most recent call last):
    File "/run/osbuild/bin/org.osbuild.qemu", line 187, in <module>
      r = main(args["inputs"], args["tree"], args["options"])
    File "/run/osbuild/bin/org.osbuild.qemu", line 179, in main
      cmd, check=True
    File "/usr/lib64/python3.6/subprocess.py", line 438, in run
      output=stdout, stderr=stderr)
  subprocess.CalledProcessError: Command '['qemu-img', 'convert', '-O', 'vpc', '-o', 'subformat=fixed,force_size', '/run/osbuild/inputs/image/disk.img', '/run/osbuild/tree/disk.vhd']' returned non-zero exit status 1.