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Where this dashboard IP is coming from or hitting to?

asked 2016-12-16 01:09:49 -0500

Rajesh@SIT gravatar image

I am new in OpenStack and presently exploring it. We have an installation of Openstack Icehouse. Everything works fine ( few occasional bugs! ). I was just wondering where the dashboard public IP x.x.x.40 is coming from. I checked the following-

  1. on controller the http server is bound to management IP:80 and running as it should be.
  2. the external interface of controller is assigned x.x.x.41 i.e the very next of dashboard ip
  3. netstat -tuplen and ifconfig do not show anything like x.x.x.40

My question is where this IP is coming from or hitting to? Can anyone point out. Thank you very much for your time.

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This depends on how your installation is set up. For example, you may have several controllers with an HA-Proxy in front of them; the HA-Proxy then listens to ....40.

Bernd Bausch gravatar imageBernd Bausch ( 2016-12-16 02:01:22 -0500 )edit

Yup, Bernd comment is right, probably your Horizon is behind a load balancer as HAproxy or a behind NAT. So the access IP is the VIP of the load balancer.

Eduardo Gonzalez gravatar imageEduardo Gonzalez ( 2016-12-16 02:48:18 -0500 )edit

Hi Bernd, Eduardo,

We have only one controller i.e. not HA installation and I am pretty sure about that. So, no question of load balancer here. Is there any other option which I might look into?

Thank you for your replies.

Rajesh@SIT gravatar imageRajesh@SIT ( 2016-12-16 08:08:50 -0500 )edit

I don't know, but the client's ARP cache tells you the MAC address associated with x.x.x.40. Try to find a device with this MAC. On the server, perhaps the API logs tell you from which IP API requests originate. You can also try tracing (wireshark, tcpdump) on the client and the server.

Bernd Bausch gravatar imageBernd Bausch ( 2016-12-16 21:01:27 -0500 )edit

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answered 2016-12-18 07:47:26 -0500

Rajesh@SIT gravatar image

Thanks for your replies.
@Bernd you were right; though we have single controller an HAproxy is configured with x.x.x.40 address.

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Asked: 2016-12-16 01:09:49 -0500

Seen: 91 times

Last updated: Dec 18 '16