Re: [Xen-users] mount DomU root fs via. NFS

[Jeenu Viswambharan <Jeenu.Viswambharan@xxxxxxx>]

On Mon, Aug 04, 2014 at 13:11:22, Ian Campbell wrote:
> On Wed, 2014-07-30 at 18:03 +0100, Jeenu Viswambharan wrote:
>
> > And I've in my guest configuration:
> >
> >   ...
> >   vif = [ "script=vif-nat,ip=192.168.1.1" ]
> >   extra = "... root=/dev/nfs nfsroot=my.ip.add.ress:/path/to/root ..."
> >   ...
>
> I've just setup NAT on a random x86 Xen box I had (I don't think the
> arch should matter) and things seem to be working ok from the guest.
> Other than ip_forward=1 and the iptables run all I had to do was
> correctly configure the ip address within the guest.
>
> One thing I tripped over was the need to setup the default
> gateway/route from within the guest. Once I set that to the IP of the
> vifX.Y device (127 more than the guest internal one, so 192.168.1.128
> here) then it worked ok.
>
> That made me come back and look here where I notice that you don't
> seem to have the ip= option which I would expect for an NFS root
> setup. Note that the ip= in the vif stanza is only about the *host*
> configuration associated with that vif (i.e. the dom0 routing tables
> etc), the virtual Ethernet device still needs to be configured within
> the guest. I did it using /etc/network/interfaces but I suppose for
> nfsroot it is done differently.

Ah, I was under the impression that the vif stanza was configuring
interface address for the guest!

Dom0 gets IP address using DHCP (I've ip=dhcp in Dom0 command line). Can
vif be configured to get IP address via. DHCP too, rather than assigning
a static one?

Later, with NAT, I suppose the guest is on a private network, and I can
pass a sensible IP address/netmask/gateway via. ip= parameter to DomU?
Otherwise, I suppose I can as well use ip=dhcp for DomU instead?

> Also I presume "my.ip.add.ress" is the server and not the guest? (the
> "my" makes me wonder).

Yes, it's the NFS server IP address.

Thanks.

--
Jeenu

-- IMPORTANT NOTICE: The contents of this email and any attachments are 
confidential and may also be privileged. If you are not the intended recipient, 
please notify the sender immediately and do not disclose the contents to any 
other person, use it for any purpose, or store or copy the information in any 
medium.  Thank you.

ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered 
in England & Wales, Company No:  2557590
ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, 
Registered in England & Wales, Company No:  2548782
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxx
http://lists.xen.org/xen-users