[libvirt] [PATCH 00/10] Enable direct use of secondary drivers

Daniel P. Berrangé berrange at redhat.com
Wed Jan 31 09:24:32 UTC 2018

On Mon, Jan 29, 2018 at 11:58:11AM +0100, Peter Krempa wrote:
> On Fri, Jan 26, 2018 at 13:35:27 +0000, Daniel Berrange wrote:
> > Currently the secondary drivers can only be used if you have a
> > connection to a primary hypervisor driver. This series introduces
> > explicit URIs that allow opening a connection that only talks to a
> > specific secondary driver. In the future these URIs will resolve to
> > individual daemons containing those drivers.
> I'm so glad to see this, it felt awkward to hand off the connection
> pointer through massive call chains. 
> The only thing I'm afraid of in the future is that once the daemons are
> split, if the user has a valid connection pointer, the code may still
> fail if it fails to open a secondary connection to e.g. the storage
> driver. All this while the original caller already had a valid pointer.

Yep, that would be a new failure scenario, but I don't think it is too
serious in the greater scheme of all possible things that can go wrong.
Most likely problem would be that someone/something failed to start the
extra daemons. On most distros this won't be a problem, because systemd
socket activation will start then on-demand. 

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