hyper-v with nova networking

asked 2014-10-14 05:46:23 +0200

benh57
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Alessandro stated:

" Alessandro PilottiFebruary 6, 2014 at 15:20Reply

Since nova-network has been deprecated, all of our networking work for Hyper-V is concentrated on Neutron. The Nova driver supports flat networking (static and dhcp), but if need VLANs, L3 and other more advanced features Neutron becomes a requirement.

This is unclear - does OpenStack on Hyper-V support nova-networking (non neutron) or not? Nova-network is in fact still being updated, even for Juno, due to Neutron's continued lack of feature parity.

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answered 2014-10-14 14:18:32 +0200

alexpilotti
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All the Hyper-V networking features, including tenant isolation, security groups, OVS support, etc. are ATM available and being developed in Neutron. We have only flat network support for Nova network.

The large majority of our users use Neutron. If there's a clear use case requiring Nova network that we cannot address with Neutron or some large installation where Nova network is required, we are definitely willing to add support for it, otherwise duplicating the efforts on networking for a component which will be eventually removed is not worth.

Most Hyper-V networking features have been added in Grizzly and at the time Nova network was already on a deprecation plan so we don't have a legacy codebase to maintain, unlike other hypervisor drivers.

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Flat networking is fine. (does that include flatDHCP?) We do not need any of those other features. I remain shocked that any customer would want to run a networking technology that forces all traffic through a central network node. Once Neuton has HA support, we will switch.

benh57 ( 2014-10-14 23:45:14 +0200 )edit

yes, flatDHCP works on Nova-Network. On Neutron, the central networking node and related fault tolerance depends on the plugin and agent that you use. If you use the standard Linux L3 agent, the only failover option is to use Pacemaker (or similar solutions) in active/passive mode.

alexpilotti ( 2014-10-15 00:31:19 +0200 )edit

Thanks. One more question -- is it possible to run a Hyper-V hypervisor within a cluster which is using nova-network HA mode for the other hypervisors? ie, i'm configured like this: Centos KVM hypervisors running in nova-network HA mode, with dnsmasq and nova network on each host add a hyper-v hypervisor -- can this host run nova-network also? Also, I see according to the release notes, Juno added support for Neutron multi host. Does this work with Hyper V yet? thanks-

benh57 ( 2014-10-17 21:56:24 +0200 )edit

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