I ran lorax (as part of pungi) in mock chroot.

It failed with:
Traceback (most recent call last):
  File "/usr/bin/pungi", line 222, in <module>
    main()
  File "/usr/bin/pungi", line 124, in main
    mypungi.doBuildinstall()
  File "/usr/lib/python2.7/site-packages/pypungi/__init__.py", line 845, in doBuildinstall
    workdir=workdir, outputdir=outputdir)
  File "/usr/lib/python2.7/site-packages/pylorax/__init__.py", line 438, in run
    self.installtree.yum.remove(package, pattern_list)
  File "/usr/lib/python2.7/site-packages/pylorax/yumhelper.py", line 120, in remove
    shutil.rmtree(fname)
  File "/usr/lib64/python2.7/shutil.py", line 244, in rmtree
    rmtree(fullname, ignore_errors, onerror)
  File "/usr/lib64/python2.7/shutil.py", line 253, in rmtree
    onerror(os.rmdir, path, sys.exc_info())
  File "/usr/lib64/python2.7/shutil.py", line 251, in rmtree
    os.rmdir(path)
OSError: [Errno 39] Directory not empty: '.../work/x86_64/yumroot//var/lib/yum/history'

This is probably due to using a NFS storage.


Lorax also needs /proc mounted (since /etc/mtab is a symlink to /proc/mounts).

Touching /proc/mounts is not enough, because /proc is also needed when creating images (efiboot, I think):
/proc/devices: fopen failed: No such file or directory
Failure to communicate with kernel device-mapper driver.
Check that device-mapper is available in the kernel.
Command failed
unable to create efidisk image

if /proc is not mounted, it ends with various crashes and lorax should check whether /proc is mounted as soon as possible.



Proposed fixes:
1)
 $ vim /usr/lib/python2.7/site-packages/pylorax/yumhelper.py +120
 add: ignore_errors=True to rmtree()
 (that's what mgracik proposed, seems to be working)

2) check if /proc is mounted when starting lorax