Do you have root logins disabled in SSH?  If I remember right, oVirt will use SSH keys once configured so you need "PermitRootLogin without-password" at a minimum.

The engine log and your auth/secure log on the host should probably give you some idea of what happened.

Scott

On Sun, Jul 3, 2016 at 10:13 AM Dewey Du <deweyto@gmail.com> wrote:
oVirt 3.6

# hosted-engine --deploy

[ ERROR ] Cannot automatically add the host to cluster Default: Cannot add Host. SSH authentication failed, verify authentication parameters are correct (Username/Password, public-key etc.) You may refer to the engine.log file for further details. 

Has anyone encountered this issue before? Thx.
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