Re: [Xen-devel] [OSSTEST PATCH 13/26] selecthost: Support nested hosts (guests which are also hosts)

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Fri, 2015-09-25 at 20:15 +0100, Ian Jackson wrote:
> We introduce a new syntax: instead of a hostname (which might appear
> in a command line argument to a ts-* script and hence be passed to
> selecthost, or which might be in a runvar), we now support
> <hostspec>:<domname>.
> 
> Such `hosts' (let us refer to such a thing as an L1, although in
> principle further nesting may be possible) are expected to be
> dynamically created.  So they do not have flags and properties in the
> configuration (or in an Executive instance's database).
> 
> The IP address is determined dynamically from the leases file.  If the
> L1 is not running, then no IP address may be found.  This is not an
> error.  Users of this facility will need to make sure that ts-*
> scripts which are unaware of the L1's special status are only invoked
> when it is known that the L1 is up and has obtained its IP address.
> 
> `Power cycling' the L1 will be done by VM control operations in the
> L0; this will come in a subsequent patch.
> 
> `Serial access' to the L1 guest will likewise need to be done via the
> console arrangements in L0.
> 
> Signed-off-by: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>

Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>


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