1. What is the problem Necessary changes for local plugin and central plugin to boot a virtual machine have been submitted in this patch. As the next step, we need to add l3 functionality to the local and central plugin. 2. What is the solution to the problem Several changes in local plugin. (1) Before creating local subnet, local plugin sends request to central plugin to create a "reserved gateway port", and use the ip address of this port as the gateway ip of the local subnet. (2) When local plugin receives network or subnet creation request, if the request contains "name" parameter and the name is a UUID, local plugin uses the name as the id of the local network or subnet. 3. What the features need to be implemented to the Tricircle to realize the solution With this patch, users can connect virtual machines booted directly via the local Nova server in different networks with a router.  https://review.openstack.org/375281 Change-Id: I12094f30804c0bad2f74e0ff510ac26bd217cfd4
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The purpose of the Tricircle project is to provide networking automation across Neutron servers in multi-region OpenStack clouds deployment.
Each OpenStack cloud includes its own Nova, Cinder and Neutron, the Neutron servers in these OpenStack clouds are called local Neuron servers, all these local Neutron servers will be configured with the Tricircle Local Neutron Plugin. A seperate Neutron server will be installed and run standalone as the coordinator of networking automation across local Neutron servers, this Neutron server will be configured with the Tricircle Central Neutron Plugin, and is called central Neutron server.
Leverage the Tricircle Central Neutron Plugin and the Tricircle Local Neutron Plugin configured in these Neutron servers, the Tricircle can ensure the IP address pool, IP/MAC address allocation and network segment allocation being managed globally without conflict, and the Tricircle handles tenant oriented data link layer(Layer2) or network layer(Layer3) networking automation across local Neutron servers, resources like VMs, bare metal or containers of the tenant can communicate with each other via Layer2 or Layer3, no matter in which OpenStack cloud these resources are running on.
Note: There are some our own definitions of Layer2/Layer3 networking across Neutron. To make sure what they are, please read our design documentation, especially "6.5 L2 Networking across Neutron". The wiki and design documentation are linked below.
The Tricircle and multi-region OpenStack clouds will use shared KeyStone(with centralized or distributed deployment) or federated KeyStones.
The Tricircle source code is distributed under the terms of the Apache License, Version 2.0. The full terms and conditions of this license are detailed in the LICENSE file.
- Free software: Apache license
- Design documentation: Tricircle Design Blueprint
- Wiki: https://wiki.openstack.org/wiki/tricircle
- Installation with DevStack: https://github.com/openstack/tricircle/blob/master/doc/source/installation.rst
- Tricircle Admin API documentation: https://github.com/openstack/tricircle/blob/master/doc/source/api_v1.rst
- Source: https://github.com/openstack/tricircle
- Bugs: http://bugs.launchpad.net/tricircle
- Blueprints: https://launchpad.net/tricircle