Re: [Qemu-discuss] User networking - bind to concrete interface/IP

[Alex]

You could suggest this enhancement to qemu developers. In the meantime, 
looks like you'll have to dig into networking! There are several 
options, depending on where you want to implement it (qemu+host or just 
host): network namespaces, or cgroups with policy routing, or good old 
tap interfaces with bridging.

On 15/01/16 16:18, address@hidden wrote:
> Using other types of networking (non-user mode) involves too much of 
> configuration and used features. I know less about networking stuff, 
> unfortunately and have no experience to configure it. It especially is harder 
> because i need only few ports being forwarded to Virtual Machines (ports are 
> unique so i bind them to all interfaces), others should be available for host 
> machine only. I am not using iptables, netfilter and conntrack right now.
>
> Was hoping such thing exists, because at other parts qemu is rather 
> configurable.
>
> Current qemu network configuration looks like:
>
> -netdev user,id=netdev1,hostfwd=tcp::6110-:6110 -device 
> rtl8139,netdev=netdev1,id=netdev1
>
> 15.01.2016, 15:31, "Alex" <address@hidden>:
> > There doesn't seem to be such an option for user mode network.
> > You've considered multiple tap interfaces on the host, of course? It
> > seems like a perfect fit to your requirements.
> >
> > On 15/01/16 14:52, address@hidden wrote:
> > >   Hello.
> > >
> > >   I have an issue.
> > >
> > >   I have multiple QEMU virtual machines with User networking and have multiple 
> > > network interfaces (eth0, eth0:1, eth0:2, eth0:3 and so on) with one public 
> > > IPv4 address per interface.
> > >
> > >   QEMU seems to always bind to eth0 interface (default). So virtual machine is 
> > > always using static IP of eth0 interface.
> > >
> > >   What i want is to bind each virtual machine to own interface.
> > >
> > >   For example:
> > >
> > >   Virtual Machine 1: qemu-system-i386 -netdev user,id=netdev1,interface=eth0 
> > > -device rtl8139,netdev=netdev1,id=netdev1
> > >   Virtual Machine 2: qemu-system-i386 -netdev user,id=netdev1,interface=eth0:1 
> > > -device rtl8139,netdev=netdev1,id=netdev1
> > >   Virtual Machine 3: qemu-system-i386 -netdev user,id=netdev1,interface=eth0:2 
> > > -device rtl8139,netdev=netdev1,id=netdev1
> > >
> > >   and so on.
> > >
> > >   So my question is:
> > >
> > >   Is there any way to bind qemu virtual machine's User networking to concrete 
> > > interface?
> > >
> > >   Thanks in advance for any answers,
> > >
> > >   Alex.
> >
> > --
> > /--Regards, Alex/

--
/--Regards, Alex/