[ovirt-users] Thinking loud about VM's serial console access

[Alon Bar-Lev]

----- Original Message -----
> From: "Jiri Belka" <jbelka at redhat.com>
> To: "Alon Bar-Lev" <alonbl at redhat.com>
> Cc: users at ovirt.org
> Sent: Monday, October 20, 2014 2:40:01 PM
> Subject: Re: [ovirt-users] Thinking loud about VM's serial console access
> 
> On Sat, 18 Oct 2014 14:39:12 -0400 (EDT)
> Alon Bar-Lev <alonbl at redhat.com> wrote:
> 
> > 
> > Please read [1].
> > 
> > I am unsure about concurrent access, this should be done using ssh bridge
> > and now low level solution.
> > 
> > Thanks,
> > Alon
> > 
> > [1] http://www.ovirt.org/Features/Serial_Console
> 
> How will it behave when:
> 
> - VM is being snapshotted?
> - VM is being migrated?
> - VM is suspended?
> - VM is being (cold)rebooted?
> 
> At least for last two I suppose the serial console session will be
> interrupted.
> 
> VMWare uses extended communication to inform virtual serial port
> concentrator about various action of a VM, thus "proxy" doesn't drop
> serial connections.

there is no reason why the proxy cannot retry for a while and reconnect to the new instance.
however this will not be provided at first nor it is that important as client can always implement reconnect at its side, and handle this just like any other network failure.

> 
> http://www.vmware.com/support/developer/vc-sdk/visdk41pubs/vsp41_usingproxy_virtual_serial_ports.pdf
> 
> j.
>