I started migration, but it failed with the following error:
File "/usr/lib/python2.7/gzip.py", line 181, in _read_gzip_header raise IOError, 'Not a gzipped file' IOError: Not a gzipped file [ERROR] | Unexpected error: 'Not a gzipped file', migration is aborted. See the traceback above for more information.
The issue is caused by a bug in python "zipfile" library.
Backup original file:
cp /usr/lib/python2.7/zipfile.py /usr/lib/python2.7/zipfile.py.orig
Download attached zipfile.py.patch and apply it to your system:
wget https://kb.cloudblue.com/Attachments/kcs-14814/zipfile.py.patch patch /usr/lib/python2.7/zipfile.py zipfile.py.patch
NOTE: It might be needed to install
yum install patch