Hi Yuval,

* reinstallation failed, because LV already exists.
  ovirt-node-ng-4.2.4-0.20180626.0     onn_ovn-monster Vri-a-tz-k <252,38g pool00                                  0,85
  ovirt-node-ng-4.2.4-0.20180626.0+1   onn_ovn-monster Vwi-a-tz-- <252,38g pool00 ovirt-node-ng-4.2.4-0.20180626.0 0,85 
See attachment imgbased.reinstall.log

* I removed them and re-reinstall without luck.

I got KeyError: <NVR ovirt-node-ng-4.2.1.1-0.20180223.0 />

See attachment imgbased.rereinstall.log

Also a new problem with nodectl info
[root@ovn-monster tmp]# nodectl info
Traceback (most recent call last):
  File "/usr/lib64/python2.7/runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib64/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/usr/lib/python2.7/site-packages/nodectl/__main__.py", line 42, in <module>
    CliApplication()
  File "/usr/lib/python2.7/site-packages/nodectl/__init__.py", line 200, in CliApplication
    return cmdmap.command(args)
  File "/usr/lib/python2.7/site-packages/nodectl/__init__.py", line 118, in command
    return self.commands[command](**kwargs)
  File "/usr/lib/python2.7/site-packages/nodectl/__init__.py", line 76, in info
    Info(self.imgbased, self.machine).write()
  File "/usr/lib/python2.7/site-packages/nodectl/info.py", line 45, in __init__
    self._fetch_information()
  File "/usr/lib/python2.7/site-packages/nodectl/info.py", line 49, in _fetch_information
    self._get_layout()
  File "/usr/lib/python2.7/site-packages/nodectl/info.py", line 66, in _get_layout
    layout = LayoutParser(self.app.imgbase.layout()).parse()
  File "/usr/lib/python2.7/site-packages/imgbased/imgbase.py", line 155, in layout
    return self.naming.layout()
  File "/usr/lib/python2.7/site-packages/imgbased/naming.py", line 109, in layout
    tree = self.tree(lvs)
  File "/usr/lib/python2.7/site-packages/imgbased/naming.py", line 224, in tree
    bases[img.base.nvr].layers.append(img)
KeyError: <NVR ovirt-node-ng-4.2.3-0.20180524.0 />