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  • Book Overview & Buying OpenStack Networking Cookbook
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OpenStack Networking Cookbook

OpenStack Networking Cookbook

By : Sriram Subramanian
5 (4)
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OpenStack Networking Cookbook

OpenStack Networking Cookbook

5 (4)
By: Sriram Subramanian
Buy this Book

Overview of this book

Networking in OpenStack has evolved from Nova Network to Neutron. This has resulted in a rich suite of networking services available to OpenStack users and administrators. Advanced services such as routers, firewall, and load balancers use building blocks such as network and subnets. Recent improvements support powerful customization using plugins. The evolution of Neutron continues as it integrates with tools like Ceilometer and Heat. This book will explore the built-in capabilities of Neutron to effectively deploy cloud solutions. You will begin with the most fundamental constructs of OpenStack Networking for switching and routing. You will then learn how to provide your tenants with services like firewalls and load-balancers. The step-by-step recipes will help you configure and troubleshoot networking problems in your cloud. This book will also introduce you to advanced topics like Ceilometer, Heat, and other upcoming tools in OpenStack
Table of Contents (14 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Sections
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Conventions
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Reader feedback
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Customer support
Lock Free Chapter
1
1. Getting Started with OpenStack Networking
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1. Getting Started with OpenStack Networking
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Introduction
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Creating a Subnet and Network using Horizon
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Viewing the details of a Network using Horizon
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Associating a Network to an instance using Horizon
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Creating a Network using OpenStack CLI
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Creating a Subnet using OpenStack CLI
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Creating a Port without an associated instance using the OpenStack CLI
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Associating a Port to an instance using OpenStack CLI
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Configuring the networking quota in OpenStack
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2. Using Open vSwitch for VLAN-Based Networks
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2. Using Open vSwitch for VLAN-Based Networks
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Introduction
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Configuring Neutron to use the Open vSwitch mechanism driver
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Configuring Neutron to use the VLAN type driver
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Configuring the VLAN range to be used for the networks
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Viewing the VLAN allotted for a Network
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Creating a Network with a specific VLAN
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Viewing the virtual interface information on the compute node
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Viewing the virtual interface information on the Network node
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3. Exploring Other Network Types in Neutron
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3. Exploring Other Network Types in Neutron
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Introduction
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Configuring Neutron to use the Linux bridge mechanism driver
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Viewing the virtual interface information for Linux bridge on the compute node
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Configuring Neutron to use a Flat network type
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Creating a Flat Network using Horizon
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Creating a Shared Network using Horizon
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Creating an External Network using Horizon
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Setting up a simple web application – an introduction
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Setting up a simple web application – setting up OpenStack Networks
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Setting up a simple web application – creating instances
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4. Exploring Overlay Networks with Neutron
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4. Exploring Overlay Networks with Neutron
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Introduction
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Configuring Neutron to use a VXLAN type driver
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Configuring a VNI Range for VXLAN Networks
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Viewing a VNI assigned to a Neutron Network
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Creating a Network with a specific VNI
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Viewing the virtual interface information on the compute node for VXLAN tunnels
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Viewing the virtual interface information on the network node for VXLAN tunnels
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Configuring Neutron to use a GRE type driver
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Viewing a virtual interface on the compute node for GRE tunnels
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5. Managing IP Addresses in Neutron
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5. Managing IP Addresses in Neutron
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Introduction
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Creating an instance with a specific IP address
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Configuring multiple IP addresses for a virtual interface
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Creating a redundant DHCP server per OpenStack Network
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Starting the DHCP server on a specific network node
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Increasing the number of IP addresses in a Network using the Horizon dashboard
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6. Using Routing Services in Neutron
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6. Using Routing Services in Neutron
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Introduction
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Configuring Neutron for Routing services
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Creating a Router using the Horizon dashboard and Neutron CLI
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Enabling instances on different Networks to communicate
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Allowing the Virtual Machine instances to access the Internet
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Providing access to a Virtual Machine from an external Network or the Internet using Horizon
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Creating and deleting a floating IP address using the Neutron CLI
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Associating a floating IP address to a virtual machine using the Neutron CLI
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7. Using Neutron Security and Firewall Services
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7. Using Neutron Security and Firewall Services
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Introduction
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Creating a security group using Horizon
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Configuring the security group rules using Horizon
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Creating a security group using CLI
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Configuring the security group rules using CLI
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Securing the traffic between instances on the same Network
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Creating the security group rules to allow web traffic
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Configuring Neutron for the Firewall service
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Creating the Firewall rules
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Creating the Firewall policies
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Creating a Firewall
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Viewing and verifying the Firewall rules on the Network node
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8. Using HAProxy for Load Balancing
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8. Using HAProxy for Load Balancing
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Introduction
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Installing and configuring the Neutron load balancer service plugin
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Creating a load balancer pool using Horizon
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Creating a load balancer pool using CLI
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Adding a load balancer member using Horizon
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Adding a load balancer member using CLI
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Adding a load balancer health monitor using Horizon
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Adding a load balancer health monitor using CLI
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Creating a Virtual IP using Horizon
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Creating a Virtual IP using CLI
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Making the load balancer accessible to the Internet
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Testing the load balancer
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Viewing the load balancer on the network node
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9. Monitoring OpenStack Networks
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9. Monitoring OpenStack Networks
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Introduction
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Monitoring the Virtual Machine bandwidth
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Monitoring the L3 bandwidth
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Monitoring the load balancer connection statistics
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Monitoring the per project and per user bandwidth
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Monitoring the host Network bandwidth
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10. Writing Your Own Neutron ML2 Mechanism Driver
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10. Writing Your Own Neutron ML2 Mechanism Driver
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Introduction
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Creating a basic ML2 mechanism driver
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Registering your ML2 mechanism driver with the Neutron server
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Processing API requests for a Network
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Processing API requests for a Subnet
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Processing API requests for a Port
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11. Troubleshooting Tips for Neutron
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11. Troubleshooting Tips for Neutron
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Introduction
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Troubleshooting a VM that does not get a DHCP IP address
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Troubleshooting a VM that does not get an initial configuration
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Troubleshooting a VM that does not get external Network access
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Troubleshooting a VM not reachable from external Networks
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Checking the status of the Neutron service
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Checking the MAC address table on a virtual switch
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12. Advanced Topics
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12. Advanced Topics
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Introduction
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Configuring Neutron for VPN as a service
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Testing VPN as a service on Neutron
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Using link aggregation on the compute node
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Integrating networking in a Heat template
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Index
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Index

Creating a Subnet and Network using Horizon

Network and Subnet are the fundamental networking entities in OpenStack. Using these two entities, virtual machines or instances are provided with Network connectivity. The creation of a Subnet and Network go hand in hand. Both OpenStack CLI and Horizon support the creation of a Subnet and Network. This recipe explains how to create a Subnet and Network using Horizon.

Getting ready

In order to create a Network and Subnet, you will need the following information, minimally:

  • The Network name
  • The Subnet name
  • The IP address range for the Subnet—the range should be in CIDR format

How to do it…

  1. Log in to the OpenStack Horizon dashboard.
  2. In the left navigation menu, click on Project | Network | Networks.
  3. Now click on the + Create Network button. The following screen will be displayed:
    How to do it…
  4. Enter the Network Name and click Next.
  5. The next screen lets you create the Subnet that will be part of the Network.
  6. Enter the Subnet Name and the address range in CIDR format, as shown in the following screenshot:
    How to do it…
  7. Click Next. In the next screen, all the fields are optional, so click on Create.
  8. Once the Network and Subnet are created successfully, the entry will appear in the Networks table, as shown here:
    How to do it…

The preceding steps covered the most commonly used workflow to create a Network and Subnet using Horizon.

How it works…

The Network and Subnet entities represent two basic Networking functionalities. A Network defines the Layer 2 (L2) boundary for all the instances that are associated with it. All the virtual machines in a Network are a part of the same L2 broadcast domain. The Subnet, on the other hand, is the range of IP addresses that are assigned to the virtual machines on the associated Network. OpenStack Neutron configures the DHCP server with this IP address range and it starts one DHCP server instance per Network, by default. OpenStack Neutron also allocates one IP to act as the gateway IP unless the user provides a specific IP address for the gateway.

There's more…

As you can see from the UI, it is possible to create a Network without a Subnet. You can choose between the IPv4 or IPv6 addressing schemes. The Subnet Details section allows operators to enable or disable DHCP for the Network. Optionally, you can also specify the DNS servers and IP pools.

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OpenStack Networking Cookbook
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