[Users] Host x is installed with VDSM version (<UNKNOWN>)

[Dan Kenigsberg]

On Fri, Jan 31, 2014 at 01:26:20PM -0500, Matt Warren wrote:
> Any troubleshooting ideas for vdsm reporting UNKNONW version when it's
> clearly 4.13 installed?
> 
> >>>   Host x is installed with VDSM version (<UNKNOWN>) and cannot join
> >>>cluster Default which is compatible with VDSM versions [4.13, 4.9, 4.11,
> >>>4.12, 4.10].
> >>>In reading some google searches, suggestion was to first run "vdsClient
> >>>-s 0 getVdsCaps". This returns "Failed to initialize storage" for any
> >>>vdsClient command.

Engine cannot tell which Vdsm is install, since there's a serious
problem there - so serious that Vdsm cannot report its own version.

Could you restart Vdsm and follow vdsm.log and supervdsm.log for hints
on why does the storage subsystem fail to start?