OpenStack in Action 4! Mark McCLain - From Segments to Services a Dive into OpenStack Networking

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Paris, 5th December 2013 : OpenStack in Action 4! organized by eNovance, brings together members of the OpenStack community.

Tecnologia

OpenStack Networking

Mark McClain

OpenStack Networking Program Technical Lead

mark.mcclain@dreamhost.com

Challenges in the Cloud

•  High-density multi-tenancy

–  But VLANs have trouble scaling

•  On-demand provisioning

–  But traditional network solutions have
interfaces designed for manual
conﬁguration.

•  Need to place / move workloads
were capacity exists

–  But network state (e.g., IP address) is
tied to a particular location

© Malcolm Leman | Dreamstime.com

Tackling these challenges

– Network virtualization

– Overlay tunneling:
VXLAN, GRE, STT

– Software-deﬁned
Networking (SDN) /
OpenFlow

– L2 Fabric solutions

– ???

Basic Abstractions

Nova

VM2

10.0.0.2

VM1

10.0.0.2

virtual server

virtual interface (VIF)

virtual port

Neutron

L2 virtual network

Net1

10.0.0.0/24

virtual subnet

Using the API...

VM1

10.0.0.2

VM2

VM3

172.16.77.1

10.0.0.2/172.16.77.2

Tenant Net1

192.168.0.0/24

Tenant Net2

172.16.77.0/24

Router

Public Net

10.0.0.0/8

Multi-Project

VM2

10.0.0.2/172.16.
77.2

VM1

10.0.0.2

VM3

VM1

10.0.0.2

172.16.77.1

Tenant A Net1

192.168.0.0/24

VM2

10.0.0.2/172.16.
77.2

Tenant B Net2

172.16.77.0/24

Router

Router

Public Net

10.0.0.0/8

172.16.77.1

Tenant B Net1

192.168.0.0/24

Tenant A Net2

172.16.77.0/24

VM3

Architecture

Generic OpenStack APIs

Operator Selected Backends

KVM

ML2 Plugin

Ceph

Compute API

Network API

Tenant Tools

(GUI, CLI, API code)

Storage API

Neutron CLI

Horizon Web UI

Heat - Orchestration

Other tools

Core Neutron API

API Extensions

Authentication Authorization via OpenStack keystone

Neutron Pluggable Backend layer

Modular Layer 2 Plugin

Nova Compute

Open vSwitch

Nova Compute

Open vSwitch

Nova Compute

Open vSwitch

API Tools

Neutron Plugins

Open vSwitch / Linux Bridge

Ryu OpenFlow

Controller

Common Features

Support for overlapping IPs

DHCP

Includes custom port options

Floating IPs

Security Groups

Supports Overlapping IPs

Handles VMs with multiple
NICs

Ingress / Egress rules

IPv6 matching

Plugins can ofﬂoad

http://www.ﬂickr.com/photos/mikebaird/2354116406/

Metadata

Simpliﬁed Conﬁguration

Supports Overlapping IPs
Non-routed networks

Modular Layer 2

Driver Based

Combines OVS and Linuxbridge Plugins

Other Mechanism Drivers Available

Arista, Cisco, Hyper-V, Tail-F NCS

Advanced Services

Load Balancing

VPN

Firewall

Load Balancing as Service

Multiple Implementations

Open Source - HAProxy

Proprietary Drivers Available

VPN as a Service

Site-to-Site

IPSec

OpenSwan Reference Implementation

Firewall as a Service

Stateless ﬁltering at the edge

Vendor drivers available

Preview available in Havana

Horizon

Manage Resources

Networks

Subnets

Routers

VPN

How to Contribute

Code:

https://github.com/openstack/neutron

Blueprints and Bugs

http://launchpad.net/neutron

More Information

Installation and Admin Manual

http://docs.openstack.org/trunk/openstacknetwork/admin/content/

Questions?

Mark McClain

OpenStack Networking Core Team Member and PTL

mark.mcclain@dreamhost.com

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