Coalesce conflicts with UUID for cloned LVM groups under the same identifier

[sar]

Error Message
Unknown error occured. Blivet-gui will be terminated. Failed to init blivet, multiple LVM groups with the same name ()

Expected Behavior

• Launch blivet-gui with UUID as volume token instead of name
• Default the runtime to UUID based calls as provided by vgdisplay | grep uuid when multiple volume groups with the same names are detected

Temporary Workaround: Rename duplicated instances with vgrename -v <uuid> <new_name> which requires volume name restore for root LVM containers

Traceback

  File "/usr/lib/python3.8/site-packages/blivetgui/communication/server.py", line 270, in _blivet_utils_init
    self.blivet_utils = BlivetUtils(*args)
  File "/usr/lib/python3.8/site-packages/blivetgui/blivet_utils.py", line 206, in __init__
    self.blivet_reset()
  File "/usr/lib/python3.8/site-packages/blivetgui/blivet_utils.py", line 1497, in blivet_reset
    self.storage.reset()
  File "/usr/lib/python3.8/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.8/site-packages/blivet/blivet.py", line 141, in reset
    self.devicetree.populate(cleanup_only=cleanup_only)
  File "/usr/lib/python3.8/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.8/site-packages/blivet/populator/populator.py", line 414, in populate
    self._populate()
  File "/usr/lib/python3.8/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.8/site-packages/blivet/populator/populator.py", line 459, in _populate
    self.handle_device(dev)
  File "/usr/lib/python3.8/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.8/site-packages/blivet/populator/populator.py", line 277, in handle_device
    self.handle_format(info, device)
  File "/usr/lib/python3.8/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.8/site-packages/blivet/populator/populator.py", line 305, in handle_format
    helper_class(self, info, device).run()
  File "/usr/lib/python3.8/site-packages/blivet/populator/helpers/lvm.py", line 408, in run
    self._add_vg_device()
  File "/usr/lib/python3.8/site-packages/blivet/populator/helpers/lvm.py", line 368, in _add_vg_device
    raise DuplicateVGError("multiple LVM volume groups with the same name (%s)" % vg_name)
blivet.errors.DuplicateVGError: multiple LVM volume groups with the same name (fedora_localhost-live)
------------------------------
  File "/usr/bin/blivet-gui", line 115, in <module>
    main()
  File "/usr/bin/blivet-gui", line 109, in main
    BlivetGUI(client)
  File "/usr/lib/python3.8/site-packages/blivetgui/blivetgui.py", line 106, in __init__
    self.blivet_init()
  File "/usr/lib/python3.8/site-packages/blivetgui/blivetgui.py", line 793, in blivet_init
    self._reraise_exception(ret.exception, ret.traceback, message,
  File "/usr/lib/python3.8/site-packages/blivetgui/blivetgui.py", line 236, in _reraise_exception
    raise type(exception)(message + "\n" + str(exception) + "\n" + traceback)

[vojtechtrefny]

Thank you for the report, I've moved the issue from blivet-gui to blivet, there's nothing I can do about this in the GUI code. Unfortunately we'll probably not going to fix this -- blivet is using devices names as a unique identifier internally and changing this would require a lot of changes, also the library we use for LVM manipulation doesn't support specifying VGs by UUID. I'm not saying we won't fix this issue, but definitely won't happen in near future and we currently consider setups with duplicate VG names to be unsupported, sorry.