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why provider networking require on both compute and controller node as per official docs

asked 2016-07-05 10:51:26 -0500

hk gravatar image

updated 2016-07-05 15:36:26 -0500

rbowen gravatar image

Hi I'm new on openstack. why provider networking require on both compute and controller node as per official docs as http://docs.openstack.org/mitaka/inst...

if virtual machine need internet access, then they could get from controller node. so why it's important?

Is it not possible to give internet access to virtual instance from controller node?

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answered 2016-07-05 15:46:34 -0500

james-denton gravatar image

If you leverage overlay networking (GRE/VXLAN) and Neutron routers in legacy or HA mode, then provider networks are only necessary on the controller/network nodes, or wherever the L3 agent is running.

If you use DVR (distributed virtual routers) or attach VMs directly to VLANs rather than VXLAN/GRE networks, then you'll need to make sure all nodes (controller/network and compute) have those provider interfaces available.

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Asked: 2016-07-05 10:51:26 -0500

Seen: 64 times

Last updated: Jul 05 '16