Dear openSUSE Community,
I’m using Xen to virtualize some Windows and Linux servers.
Currently I’m using two machines, one for production, which runs Xen 3.2.1 with Debian5 Dom0 and the second one (Xen 4.0.1, openSuse 11.4 dom0) for development/testing.
I’m experiencing some problems with an HVM linux domU over the openSUSE machine.
In particular, the linux domU runs network services (web server, ssh), and, periodically, in an intermittent manner, the domU’s network goes off.
I realized that the vnc console attached to the domU still works, i.e., the domU is responsive, while the network doesn’t work.
The host machine is underloaded, i.e., it runs just two hvm domUs (the linux domU and an idle windows domU).
To figure out the problem, I run a simple ping test from my laptop to both domUs runinng on my server. The ping test shows that both domU suffers intermittent connectivity. More interestingly, when a domU network works, the other domU’s network doesn’t and viceversa. (In the meantime, the dom0 network is always responsive)
So it seems a “network scheduling” problem among virtual machines.
I already posted this issue on the xen users mailing list, but given the use of standard linux tools (such as linux bridge i.e., brctl) to provide virtual machines networks, I’m trying to get some help also from the openSUSE community.
Any hint is appreciated, I’m trying to use openSUSE as standard virtualization container for a my company project, but I can’t do that without solving this issue!