Shulou(Shulou.com)06/02 Report--

1 description

In the traditional centralized routing environment of openstack, the north-south traffic and the east-west traffic across the network all pass through the network node. When the scale of the computing node becomes larger and larger, the network node will soon become the bottleneck of the whole system. The concept of Distribute Virtual Router (DVR) is introduced to solve this problem.

DVR distributes routes to computing nodes, and north-south traffic and east-west traffic across network segments are routed by virtual routes on the computing node where the virtual machine is located.

2 DVR structure diagram

3 DVR configuration

The network scheme adopted in this paper is openvswitch vxlan.

3.1 Control Node configuration

/ etc/neutron/neutron.conf add the following configuration

[DEFAULT]

Router_distributed = True

Restart neutron-server

Systemc restart neutron-server.service

3.2 Network node configuration

Add the following configuration to / etc/neutron/plugins/ml2/ml2_conf.ini

[agent]

L2_population = True

Enable_distributed_routing = True

Apr_responder = True

Add the following configuration to / etc/neutron/plugins/ml2/openvswitch_agent.ini

[default]

Enable_distributed_routing = True

Restart neutron-openvswitch-agent,neutron-l3-agent

Systemctl restart neutron-openvswitch-agent neutron-l3-agent

3.3 Compute node configuration

The following software openstack-neutron,openstack-neutron-ml2 is installed in the compute node

Yum install-y openstack-neutron openstack-neutron-ml2

Add the following configuration to / etc/neutron/l3_agent.ini

[default]

Agent_mode = dvr_snat

Add the following configuration to / etc/neutron/plugins/ml2/ml2_conf.ini

[agent]

L2_population = True

Enable_distributed_routing = True

Add the following configuration to / etc/neutron/plugins/ml2/openvswitch_agent.ini

[default]

Enable_distributed_routing = True

Apr_responder = True

Restart neutron-openvswitch-agent,neutron-l3-agent

Systemctl restart neutron-openvswitch-agent neutron-l3-agent

View the installed network agent

[root@network ~] # openstack network agent list

+- -+

| | ID | Agent Type | Host | Availability Zone | Alive | State | Binary | |

+- -+

| | 77717425-5a8f-494d-a144-8d1831e7d5de | Metadata agent | network | None |: -) | UP | neutron-metadata-agent |

| | 903d9a68-b050-4948-8c4b-ecc329189fff | Open vSwitch agent | compute | None |: -) | UP | neutron-openvswitch-agent |

| | bb1cdef8-e8bf-4353-8b89-2b33464392a5 | L3 agent | network | nova |: -) | UP | neutron-l3-agent |

| | c59b2915-184d-4e38-9d8a-e5c593001db0 | Open vSwitch agent | network | None |: -) | UP | neutron-openvswitch-agent |

| | ce266daa-dee1-45a9-93e4-bb0b1edb5b8b | DHCP agent | network | nova |: -) | UP | neutron-dhcp-agent |

| | d0173090-50a6-4d02-8af8-cf73204a05c7 | L3 agent | compute | nova |: -) | UP | neutron-l3-agent |

| | f2ce576c-01e8-488b-b718-68aa9117c2ac | Metadata agent | compute | None |: -) | UP | neutron-metadata-agent |

+- -+

Create a network and DVR

#! / bin/bash

Neutron net-create-shared-router:external=True-provider:network_type flat-provider:physical_network provider public

Neutron subnet-create public 192.168.100.0 neutron subnet-create public 24-name public-sub-allocation-pool start=192.168.100.181,end=192.168.100.190-dns-nameserver 8.8.8.8-gateway 192.168.100.1-enable_dhcp=False

Neutron net-create private-provider:network_type vxlan-router:external False-shared

Neutron subnet-create private--name private-sub-- gateway 172.17.0.1 172.17.0.1-- dns-nameserver 8.8.8.8

Neutron router-create dvr-router-distributed true

Neutron router-interface-add dvr-router private-sub

Neutron router-gateway-set dvr-router public

Create a virtual machine to bind a floating IP, which can be operated on dashboard

The qrouter of the computing node

[root@compute ~] # ip netns

Fip-51e0cb5e-1058-4a97-b205-a57d245a6726

Qrouter-a3cc1dbb-73cb-431d-97e5-23be9aa7be20

Qrouter of network node

[root@network ~] # ip netns

Snat-a3cc1dbb-73cb-431d-97e5-23be9aa7be20

Fip-51e0cb5e-1058-4a97-b205-a57d245a6726

Qrouter-a3cc1dbb-73cb-431d-97e5-23be9aa7be20

Qdhcp-53896585-6380-48f1-aed9-db340c5facf9

Topological graph

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