Merge "Documentation: Using Neutron with DevStack"
This commit is contained in:
Jenkins
Gerrit Code Review
commit
db3225c126
|
|
@ -0,0 +1,195 @@
|
|||
======================================
|
||||
Using DevStack with Neutron Networking
|
||||
======================================
|
||||
|
||||
This guide will walk you through using OpenStack Neutron with the ML2
|
||||
plugin and the Open vSwitch mechanism driver.
|
||||
|
||||
Network Interface Configuration
|
||||
===============================
|
||||
|
||||
To use Neutron, it is suggested that two network interfaces be present
|
||||
in the host operating system.
|
||||
|
||||
The first interface, eth0 is used for the OpenStack management (API,
|
||||
message bus, etc) as well as for ssh for an administrator to access
|
||||
the machine.
|
||||
|
||||
::
|
||||
|
||||
stack@compute:~$ ifconfig eth0
|
||||
eth0 Link encap:Ethernet HWaddr bc:16:65:20:af:fc
|
||||
inet addr:192.168.1.18
|
||||
|
||||
eth1 is manually configured at boot to not have an IP address.
|
||||
Consult your operating system documentation for the appropriate
|
||||
technique. For Ubuntu, the contents of `/etc/networking/interfaces`
|
||||
contains:
|
||||
|
||||
::
|
||||
|
||||
auto eth1
|
||||
iface eth1 inet manual
|
||||
up ifconfig $IFACE 0.0.0.0 up
|
||||
down ifconfig $IFACE 0.0.0.0 down
|
||||
|
||||
The second physical interface, eth1 is added to a bridge (in this case
|
||||
named br-ex), which is used to forward network traffic from guest VMs.
|
||||
Network traffic from eth1 on the compute nodes is then NAT'd by the
|
||||
controller node that runs Neutron's `neutron-l3-agent` and provides L3
|
||||
connectivity.
|
||||
|
||||
::
|
||||
|
||||
stack@compute:~$ sudo ovs-vsctl add-br br-ex
|
||||
stack@compute:~$ sudo ovs-vsctl add-port br-ex eth1
|
||||
stack@compute:~$ sudo ovs-vsctl show
|
||||
9a25c837-32ab-45f6-b9f2-1dd888abcf0f
|
||||
Bridge br-ex
|
||||
Port br-ex
|
||||
Interface br-ex
|
||||
type: internal
|
||||
Port phy-br-ex
|
||||
Interface phy-br-ex
|
||||
type: patch
|
||||
options: {peer=int-br-ex}
|
||||
Port "eth1"
|
||||
Interface "eth1"
|
||||
|
||||
|
||||
|
||||
|
||||
Neutron Networking with Open vSwitch
|
||||
====================================
|
||||
|
||||
Configuring Neutron networking in DevStack is very similar to
|
||||
configuring `nova-network` - many of the same configuration variables
|
||||
(like `FIXED_RANGE` and `FLOATING_RANGE`) used by `nova-network` are
|
||||
used by Neutron, which is intentional.
|
||||
|
||||
The only difference is the disabling of `nova-network` in your
|
||||
local.conf, and the enabling of the Neutron components.
|
||||
|
||||
|
||||
Configuration
|
||||
-------------
|
||||
|
||||
::
|
||||
|
||||
FIXED_RANGE=10.0.0.0/24
|
||||
FLOATING_RANGE=192.168.27.0/24
|
||||
PUBLIC_NETWORK_GATEWAY=192.168.27.2
|
||||
|
||||
disable_service n-net
|
||||
enable_service q-svc
|
||||
enable_service q-agt
|
||||
enable_service q-dhcp
|
||||
enable_service q-meta
|
||||
enable_service q-l3
|
||||
|
||||
Q_USE_SECGROUP=True
|
||||
ENABLE_TENANT_VLANS=True
|
||||
TENANT_VLAN_RANGE=1000:1999
|
||||
PHYSICAL_NETWORK=default
|
||||
OVS_PHYSICAL_BRIDGE=br-ex
|
||||
|
||||
In this configuration we are defining FLOATING_RANGE to be a
|
||||
subnet that exists in the private RFC1918 address space - however in
|
||||
in a real setup FLOATING_RANGE would be a public IP address range.
|
||||
|
||||
Neutron Networking with Open vSwitch and Provider Networks
|
||||
==========================================================
|
||||
|
||||
In some instances, it is desirable to use Neutron's provider
|
||||
networking extension, so that networks that are configured on an
|
||||
external router can be utilized by Neutron, and instances created via
|
||||
Nova can attach to the network managed by the external router.
|
||||
|
||||
For example, in some lab environments, a hardware router has been
|
||||
pre-configured by another party, and an OpenStack developer has been
|
||||
given a VLAN tag and IP address range, so that instances created via
|
||||
DevStack will use the external router for L3 connectivity, as opposed
|
||||
to the Neutron L3 service.
|
||||
|
||||
|
||||
Service Configuration
|
||||
---------------------
|
||||
|
||||
**Control Node**
|
||||
|
||||
In this example, the control node will run the majority of the
|
||||
OpenStack API and management services (Keystone, Glance,
|
||||
Nova, Neutron, etc..)
|
||||
|
||||
|
||||
**Compute Nodes**
|
||||
|
||||
In this example, the nodes that will host guest instances will run
|
||||
the `neutron-openvswitch-agent` for network connectivity, as well as
|
||||
the compute service `nova-compute`.
|
||||
|
||||
DevStack Configuration
|
||||
----------------------
|
||||
|
||||
The following is a snippet of the DevStack configuration on the
|
||||
controller node.
|
||||
|
||||
::
|
||||
|
||||
PUBLIC_INTERFACE=eth1
|
||||
|
||||
## Neutron options
|
||||
Q_USE_SECGROUP=True
|
||||
ENABLE_TENANT_VLANS=True
|
||||
TENANT_VLAN_RANGE=3001:4000
|
||||
PHYSICAL_NETWORK=default
|
||||
OVS_PHYSICAL_BRIDGE=br-ex
|
||||
|
||||
Q_USE_PROVIDER_NETWORKING=True
|
||||
Q_L3_ENABLED=False
|
||||
|
||||
# Do not use Nova-Network
|
||||
disable_service n-net
|
||||
|
||||
# Neutron
|
||||
ENABLED_SERVICES+=,q-svc,q-dhcp,q-meta,q-agt
|
||||
|
||||
## Neutron Networking options used to create Neutron Subnets
|
||||
|
||||
FIXED_RANGE="10.1.1.0/24"
|
||||
PROVIDER_SUBNET_NAME="provider_net"
|
||||
PROVIDER_NETWORK_TYPE="vlan"
|
||||
SEGMENTATION_ID=2010
|
||||
|
||||
In this configuration we are defining FIXED_RANGE to be a
|
||||
subnet that exists in the private RFC1918 address space - however in
|
||||
in a real setup FIXED_RANGE would be a public IP address range, so
|
||||
that you could access your instances from the public internet.
|
||||
|
||||
The following is a snippet of the DevStack configuration on the
|
||||
compute node.
|
||||
|
||||
::
|
||||
|
||||
# Services that a compute node runs
|
||||
ENABLED_SERVICES=n-cpu,rabbit,q-agt
|
||||
|
||||
## Neutron options
|
||||
Q_USE_SECGROUP=True
|
||||
ENABLE_TENANT_VLANS=True
|
||||
TENANT_VLAN_RANGE=3001:4000
|
||||
PHYSICAL_NETWORK=default
|
||||
OVS_PHYSICAL_BRIDGE=br-ex
|
||||
PUBLIC_INTERFACE=eth1
|
||||
Q_USE_PROVIDER_NETWORKING=True
|
||||
Q_L3_ENABLED=False
|
||||
|
||||
When DevStack is configured to use provider networking (via
|
||||
`Q_USE_PROVIDER_NETWORKING` is True and `Q_L3_ENABLED` is False) -
|
||||
DevStack will automatically add the network interface defined in
|
||||
`PUBLIC_INTERFACE` to the `OVS_PHYSICAL_BRIDGE`
|
||||
|
||||
For example, with the above configuration, a bridge is
|
||||
created, named `br-ex` which is managed by Open vSwitch, and the
|
||||
second interface on the compute node, `eth1` is attached to the
|
||||
bridge, to forward traffic sent by guest vms.
|
||||
|
|
@ -63,6 +63,7 @@ Walk through various setups used by stackers
|
|||
guides/single-vm
|
||||
guides/single-machine
|
||||
guides/multinode-lab
|
||||
guides/neutron
|
||||
|
||||
All-In-One Single VM
|
||||
--------------------
|
||||
|
|
@ -84,6 +85,13 @@ Multi-Node Lab
|
|||
Setup a :doc:`multi-node cluster <guides/multinode-lab>` with dedicated VLANs for VMs & Management.
|
||||
:doc:`[Read] <guides/multinode-lab>`
|
||||
|
||||
DevStack with Neutron Networking
|
||||
--------------------------------
|
||||
|
||||
Building a DevStack cluster with :doc:`Neutron Networking <guides/neutron>`.
|
||||
This guide is meant for building lab environments with a dedicated
|
||||
control node and multiple compute nodes.
|
||||
|
||||
DevStack Documentation
|
||||
======================
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue