----- Original Message -----
> From: "huntxu" <mhun...@gmail.com>
> To: vdsm-devel@lists.fedorahosted.org
> Sent: Thursday, November 8, 2012 12:58:09 PM
> Subject: [vdsm] [RFC] ipv6 support of vdsm
> Hi, folks.
> Recently I am considering to implement ipv6 support for vdsm. First
> of all
> I
> would like to know whether there is already someone working on this
> feature.
> If so, I might do something to help, however, if not, I would try to
> implement
> it with suggestions from this discussion.
> With ipv6 support vdsm is supposed to work properly in:
>      * mixed environment, in which ipv4 and ipv6 addresses coexist
>      * ipv6-pure environment
> My idea is:
> 1) Provide a mechanism to setup ipv6 address configuration of a host
> via
> XMLRPC/RestAPI. This would be done in the current ConfigNetwork
> module by
> modifying the network-scripts/ifcfg-* of the devices. Thus the host
> is
> able to access ipv6 network (with correct configuration).
> 2) For incoming spice connections, qemu is able to listen to ipv6
> address,
> so we use a boolean option "spice_use_ipv6" which indicates whether
> qemu
> should listen to incoming ipv6 or ipv4 connections.
> 3) Make the connection with ovirt-engine(management connection) also
> ipv6-
> compatible. This requires modifying both XMLRPC and RestAPI servers
> to make
> them able to bind to the ipv6 address of the host. Also we need
> another
> boolean option "use_ipv6" to indicate what is the ip version of the
> management
> connection.
> 4) Regarding the register process, all is the same with the current
> workflow,
> except for if we use ipv6 to register, we should firstly set
> "use_ipv6" to
> True, then XMLRPC and RestAPI servers would be listening on the ipv6
> address
> after vdsm restarts.
> 5) The management connection is supposed to be able to switch between
> ipv4
> and ipv6 on the fly (when host is under maintenance and with proper
> network
> configuration of the host). This requires another vdsm API.
> Suggestions are always welcome. Thanks.

This is great, although I don't understand why not listening to all incoming 

Why does the application cares if it is connected from ipv4 or ipv6? it should 
accept any connection.

If we can put ACL of valid sources, and then be ip type aware, but it is not 
implemented currently as far as I know, so no need to add this now.

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