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Linux-box instance as a router with NAT

asked 2014-11-20 16:29:33 -0500

anonymous user

Anonymous

Is it possible to configure an instance which will act as a router in current OpenStack/Neutron architecture? Linux-based instance, not a virtual router in neutron via OpenvSwitch. I'd like to create an instance with two NICs one connected to private network and the second one connected to an external network (probably later to VPN) and I'd like to do an old, good routing there with NAT for instances inside the private network.

My usual simple setup (forwarding and NAT) didn't work out, so do you have any ideas how should I sort this out?

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answered 2014-11-21 09:46:07 -0500

bishoy gravatar image

updated 2014-11-21 09:47:10 -0500

by doing that you only have your L2 configured and you still need L3. You can create namespaces manually and then it might work( that what actually L3 agent does)

Could you print ovs-vsctl show after adding the instance

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answered 2014-11-21 03:07:11 -0500

DanIzack gravatar image

VNIC ( on Openstack VM ) can be assigned only private IP via dnsmasq DHCPACK response.
It happens at Neutron L2 layer.
Floating IP is assigned to VM with several neutron commands - http://docs.openstack.org/user-guide/...
Iptables SNAT and DNAT rules ( previously setup) define packets flow from VM with private IP to external network. Actually , it is neutron-l3-agent ( neutron routers) responsibility. So "old good routing" won't work for you without Neutron L3 Layer.

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Asked: 2014-11-20 16:29:33 -0500

Seen: 733 times

Last updated: Nov 21 '14

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