ranjan188
2010-Feb-17 19:09 UTC
[Xen-devel] [libvirt] Using libvirt to obtain ip address of virtual domain
I am new to libvirt and am looking for the most efficient way to programmatically obtain the ip address of all the Guest virtual machine from host machine . Libvirt is providing access to xen in my case. A nudge in the right direction would be appreciated! -- View this message in context: http://old.nabble.com/-libvirt--Using-libvirt-to-obtain-ip-address-of-virtual-domain-tp27627745p27627745.html Sent from the Xen - Dev mailing list archive at Nabble.com. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Keir Fraser
2010-Feb-17 20:52 UTC
Re: [Xen-devel] [libvirt] Using libvirt to obtain ip address of virtual domain
On 17/02/2010 19:09, "ranjan188" <ran_foru@yahoo.co.in> wrote:> I am new to libvirt and am looking for the most efficient way to > programmatically obtain the ip address of all the Guest virtual machine from > host machine . Libvirt is providing access to xen in my case. A nudge in the > right direction would be appreciated!There isn''t necessarily an easy way to do that on the box, if for example guests are served IP addresses from an external DHCP server. The guests don''t communicate their IP address info back to the local host controller (dom0). -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
ranjan188
2010-Feb-19 06:34 UTC
Re: [Xen-devel] [libvirt] Using libvirt to obtain ip address of virtual domain
Is there any way to get the ip address ?? Keir Fraser-3 wrote:> > There isn''t necessarily an easy way to do that on the box, if for example > guests are served IP addresses from an external DHCP server. The guests > don''t communicate their IP address info back to the local host controller > (dom0). > > -- Keir > > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel > >-- View this message in context: http://old.nabble.com/-libvirt--Using-libvirt-to-obtain-ip-address-of-virtual-domain-tp27627745p27634126.html Sent from the Xen - Dev mailing list archive at Nabble.com. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
James Harper
2010-Feb-19 06:49 UTC
RE: [Xen-devel] [libvirt] Using libvirt to obtain ip address ofvirtual domain
> > Is there any way to get the ip address ??You could make the DomU write it''s IP address to xenstore via a script. Under Debian you might do this in an ''up'' script in /etc/network/interfaces, for a static IP, and in one of the DHCP hooks for DHCP. Remember that it could have more than one address, and you might want the IPv6 address too. I don''t know how easy it is to make the userspace xenstore tools work under DomU but I assume it isn''t too hard... arpwatch can listen on Dom0''s network interface and figure out what MAC address matches up with what IP address, and log them to syslog. You could write some packet sniffing magic to do the same thing too. It would be subject to poisoning via malicious packets though. The DomU could register its name in DNS and you could look it up that way (assuming you know the DNS name...) The DomU could send an SNMP trap or otherwise communicate its address to Dom0 via the network, assuming it is accessible. I like the first option. It means that Dom0 could ''watch'' for changes, and it could be extended to provide other info too... James _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel