On Tue, Oct 16, 2012 at 12:51:23AM +0800, Xu He Jie wrote: > [SNIP] > Hi, Adam, Could you explain more detail about how streaming API can > survive a VM migration? > > If we want to support migration, I think we should implement console > server out of vdsm. > Actually, It will work like proxy. So we call it as consoleProxy > now. That consoleProxy can deploy on same machine with engine, > or standalone, or virtual machine. I think its' working flow as below: > > 1. user request open console to engine. > 2. engine setTicket(uuid, ticket, hostofvm) to consoleProxy. > consoleProxy need provide api to engine. > 3. engine return ticket to user. > 4. user 'ssh UUID@consoleProxy' with ticket. > 5. consoleProxy connect 'virsh -c qemu+tls://hostofvm/system console'. > the host of running consoleProxy should have certificates of all > vdsm host. > 6. consoleProxy redirect output of 'virsh -c > qemu+tls://hostofvm/system console' with ssh protocol. > Same with currently implement. we can use system sshd or paramiko. > If we use paramiko, it almost reuse the code of consoleServer > that I have already writen. > > After vm migrated: > 1. engine tell consoleProxy that vm was migrated. > I guess engine can know vm finished migration? > And engine how to push the event of vm finished migration to > consoleProxy? Engine only have rest api didn't support event push? > Is streaming api can resolve this problem? > 2. consoleProxy kill 'virsh console'. > 3. reconnect to new host of vm with 'virsh console' again. > There will missing some character if the reconnection isn't > enough fast. > This is hardly to resolve except implement ssh in qemu. I guess > streaming api have some problem too. > 4. continue redirect 'virsh console'. > > Actually if we implement consoleProxy out of vdsm, we don't need > decide it will run on physical machine or > virtual machine now. > > A lot detail need to think. I'm not cover all problem. And I haven't > code to prove that work now. Just depend on thinking. > > Is this make sense?
How is this handled with current displays like VNC and Spice? _______________________________________________ vdsm-devel mailing list vdsm-devel@lists.fedorahosted.org https://lists.fedorahosted.org/mailman/listinfo/vdsm-devel
