[Xen-devel] Xenserver Iptables with openvswitch

[Eddi Linder <eddi@xxxxxxxxxxxxxx>]

Hi,Â

I am currently working on a datapath solution whichÂwill be located between vm interfaces and the br-int ovs.Â

The idea is to implement something similar to the security groups in openstack - we want to install additional (TCP flag filter based) rules on theÂiptablesÂon the linux bridges to mirror/redirect specific packets to our own hypervisor process.

The scheme described on openstack's website shows that it uses a linux bridges for each interface in between the vm and the br-int ovs, and applies iptables rules on the interfaces connected to the bridge.Â

http://docs.openstack.org/admin-guide-cloud/content/figures/10/a/common/figures/under-the-hood-scenario-1-ovs-compute.png

When trying to deploy a similar solution on xenserver, we found out that linux bridges and openvswitch kernel modules cannot coexist on this specific hypervisor (it is simply not supported on old kernels like it has).

So the question is, how did openstack implement the security groups on xenserver hosts,ÂwithoutÂusing the default linux bridge kernel module?

Thank you,

Eddi

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