Re: [dpdk-dev] [PATCH 0/4 for 2.3] vhost-user live migration support

[Pavel Fedin <p.fedin@samsung.com>]

 Hello!

> > Host<------->openVSwitch<----------->guest
> >       LOCAL               vhostuser
> >
> >  So, in order to migrate the guest, i simply replicated this setup on both hosts, with the
> same IPs on host side. And on both hosts i set up the following ruleset for openvswitch:
> 
> Regarding to "with the same IPs on host side": do you mean that you
> configured the same IP on two hosts in the intranet?

 No intranet. You can think of it as an isolated network between the host and guest, and that's all. I just assigned an IP to ovs' LOCAL interface on both hosts, and these ovs instances knew nothing about each other, neither they forwarded packets between each other. I didn't want to make things overcomplicated and decided not to mess with host's own connection to the intranet, just something that sits on the other side of vhost-user and replies to PINGs was perfectly OK for me.

> I think this
> does not matter if we are testing it functionally (whether live
> migration could work), However I would still perfer to try ping
> another host (say, host3) inside the intranet. What do you think?

 Yes, perhaps this would be better test, may be next time i'll do it. Anyway, IIRC, PATCH v2 is coming.

Kind regards,
Pavel Fedin
Expert Engineer
Samsung Electronics Research center Russia