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Matthew Kassawara 374a38f49a [install] Initial networking architecture changes

Implement initial networking architecture changes for Liberty
as follows:

1) Remove nova-network.
2) Develop architecture for provider networks with Linux
   bridge agent.
3) Develop architecture for self-service networks with
   Linux bridge agent.
4) Munge the neutron controller and network node configuration
   together.
5) Rejigger neutron to use the Linux bridge agent.
6) Restructure launch an instance content to account for
   two networking options.
7) Other restructuring as necessary to meet the primary
   goal.

For simplicity, both architectures require only two nodes,
each with two network interfaces, to deploy core OpenStack
services. Also, to address recurring issues about the lack
of support for connecting instances directly to the
public/external network, the self-service architecture
augments the provider networks architecture which allows
connection to both private and public networks.

Change-Id: Ie3ab9a15ebfe82c0ce54f709c87a66d7cc46db3f
Implements: blueprint installguide-liberty

2015-09-22 10:59:55 -05:00

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Public provider network

Before launching an instance, you must create the necessary virtual network infrastructure. For networking option 1, an instance uses a public provider virtual network that connects to the physical network infrastructure via layer-2 (bridging/switching). This network includes a DHCP server that provides IP addresses to instances.

The admin or other privileged user must create this network because it connects directly to the physical network infrastructure.

Note

The following instructions and diagrams use example IP address ranges. You must adjust them for your particular environment.

**Networking Option 1: Provider networks - Overview**

**Networking Option 2: Provider networks - Connectivity**

Create the public network

On the controller node, source the admin credentials to gain access to admin-only CLI commands:
```
$ source admin-openrc.sh
```

Create the network:

$ neutron net-create public --shared --provider:physical_network public \
  --provider:network_type flat
Created a new network:
+---------------------------+--------------------------------------+
| Field                     | Value                                |
+---------------------------+--------------------------------------+
| admin_state_up            | True                                 |
| id                        | 0e62efcd-8cee-46c7-b163-d8df05c3c5ad |
| mtu                       | 0                                    |
| name                      | public                               |
| port_security_enabled     | True                                 |
| provider:network_type     | flat                                 |
| provider:physical_network | public                               |
| provider:segmentation_id  |                                      |
| router:external           | False                                |
| shared                    | True                                 |
| status                    | ACTIVE                               |
| subnets                   |                                      |
| tenant_id                 | d84313397390425c8ed50b2f6e18d092     |
+---------------------------+--------------------------------------+

The --shared option allows all projects to use the virtual network.

The --provider:physical_network public and --provider:network_type flat options connect the flat virtual network to the flat (native/untagged) public physical network on the eth1 interface on the host using information from the following files:

ml2_conf.ini:

[ml2_type_flat]
flat_networks = public

linuxbridge_agent.ini:

[linux_bridge]
physical_interface_mappings = public:eth1

Create a subnet on the network:

$ neutron subnet-create public PUBLIC_NETWORK_CIDR --name public \
  --allocation-pool start=START_IP_ADDRESS,end=END_IP_ADDRESS\
  --gateway PUBLIC_NETWORK_GATEWAY

Replace PUBLIC_NETWORK_CIDR with the subnet on the public physical network in CIDR notation.

Replace START_IP_ADDRESS and END_IP_ADDRESS with the first and last IP address of the range within the subnet that you want to allocate for instances. This range must not include any existing active IP addresses.

Replace PUBLIC_NETWORK_GATEWAY with the gateway IP address on the public physical network, typically the ".1" IP address.

Example

The public physical network uses 203.0.113.0/24 with a gateway on 203.0.113.1 and instances can use 203.0.113.101 to 203.0.113.200.

$ neutron subnet-create public 203.0.113.0/24 --name public \
  --allocation-pool start=203.0.113.101,end=203.0.113.200 \
  --gateway 203.0.113.1
Created a new subnet:
+-------------------+----------------------------------------------------+
| Field             | Value                                              |
+-------------------+----------------------------------------------------+
| allocation_pools  | {"start": "203.0.113.101", "end": "203.0.113.200"} |
| cidr              | 203.0.113.0/24                                     |
| dns_nameservers   |                                                    |
| enable_dhcp       | True                                               |
| gateway_ip        | 203.0.113.1                                        |
| host_routes       |                                                    |
| id                | 5cc70da8-4ee7-4565-be53-b9c011fca011               |
| ip_version        | 4                                                  |
| ipv6_address_mode |                                                    |
| ipv6_ra_mode      |                                                    |
| name              | public                                             |
| network_id        | 0e62efcd-8cee-46c7-b163-d8df05c3c5ad               |
| subnetpool_id     |                                                    |
| tenant_id         | d84313397390425c8ed50b2f6e18d092                   |
+-------------------+----------------------------------------------------+

Return to Launch an instance - Create virtual networks <launch-instance-networks>.

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Public provider network

Create the public network

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