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Rework ssh known-hosts handling.
This changes: - cluster setup, we no longer edit /etc/ssh/ssh_known_hosts but our own file - node add, we no longer remove root's known_hosts (twice) - gnt-instance console, both the LU and the script: since now the ssh...
Disable hashing of the ssh keys.
In case we use StrictHostKeyChecking=ask, also add HashKnownHosts=no so thatdebugging is easier. The nodes to which we are connecting are anyway visible in/etc/ssh/ssh_known_hosts.
Style changes for pep-8 and python-3000 compliance.
This changes the raising of exceptions from: raise Exception, valueto raise Exception(value)
as the first form will be removed in python-3000 and the second form ispreferred now.
The changes also involve a few cases of changing from raising standard...
Comment formatting updates.
Reviewed-by: iustinp
Initial commit.