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OpenStack Essentials

OpenStack Essentials

By : Dan Radez
2.7 (3)
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OpenStack Essentials

OpenStack Essentials

2.7 (3)
By: Dan Radez

Overview of this book

OpenStack is a widely popular platform for cloud computing. Applications that are built for this platform are resilient to failure and convenient to scale. This book, an update to our extremely popular OpenStack Essentials (published in May 2015) will help you master not only the essential bits, but will also examine the new features of the latest OpenStack release - Mitaka; showcasing how to put them to work straight away. This book begins with the installation and demonstration of the architecture. This book will tech you the core 8 topics of OpenStack. They are Keystone for Identity Management, Glance for Image management, Neutron for network management, Nova for instance management, Cinder for Block storage, Swift for Object storage, Ceilometer for Telemetry and Heat for Orchestration. Further more you will learn about launching and configuring Docker containers and also about scaling them horizontally. You will also learn about monitoring and Troubleshooting OpenStack.
Table of Contents (15 chapters)
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Preface
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
1. RDO Installation
1. RDO Installation
OpenStack architecture
Dashboard
Keystone
Glance
Neutron
Nova
Cinder
Swift
Ceilometer
Heat
OpenStack installation
Installing RDO using Packstack
Installing RDO using Triple-O
Connecting to your Overcloud
Summary
2
2. Identity Management
2. Identity Management
Services and endpoints
Interacting with Keystone in the dashboard
Endpoints in the dashboard
Summary
3
3. Image Management
3. Image Management
Glance as a registry of images
Using the web interface
Building an image
Summary
4
4. Network Management
4. Network Management
Networking and Neutron
Open vSwitch configuration
Creating a network
Web interface management
External network access
Web interface external network setup
Summary
5
5. Instance Management
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5. Instance Management
Managing flavors
Managing key pairs
Launching an instance
Managing floating IP addresses
Managing security groups
Communicating with the instance
Launching an instance using the web interface
Summary
6
6. Block Storage
6. Block Storage
Use case
Creating and using block storage
Attaching the block storage to an instance
Managing Cinder volumes in the web interface
Backing storage
Ceph setup
Summary
7
7. Object Storage
7. Object Storage
Use case
Architecture of a Swift cluster
Creating and using object storage
Object file management in the web interface
Using object storage on an instance
Ring files
Summary
8
8. Telemetry
8. Telemetry
Understanding the data store
Definitions of Ceilometer's configuration terms
Graphing the data
Summary
9
9. Orchestration
9. Orchestration
About orchestration
Writing templates
The Heat Orchestration Template format
Launching a stack
Autoscaling instances with Heat
LBaaS setup
Web interface
Summary
10
10. Docker
10. Docker
Containers
OpenStack integration
Nova compute configuration
Glance configuration
Launching a Docker instance
Summary
11
11. Scaling Horizontally
11. Scaling Horizontally
Scaling compute nodes
Installing more control nodes
Load-balancing control services
High availability
Highly available database and message bus
Summary
12
12. Monitoring
12. Monitoring
Monitoring defined
Installing Nagios
Monitoring methods
Non-OpenStack service checks
Monitoring control services
Monitoring network services
Monitoring compute services
Summary
13
13. Troubleshooting
13. Troubleshooting
The OpenStack debug command-line option
Tailing the server logs
Troubleshooting Keystone and authentication
Troubleshooting Glance image management
Troubleshooting Neutron networking
Troubleshooting Nova launching instances
Troubleshooting post-boot metadata
Troubleshooting console access
Troubleshooting Cinder block storage
Troubleshooting Swift object storage
Troubleshooting Ceilometer Telemetry
Troubleshooting Heat orchestration
Getting more help
Summary
14
Index
Index

Managing key pairs

Since a cloud image is a copy of an already existing disk image with an operating system already installed, the root users are generally disabled, and if the root password is set, it is usually not distributed. To overcome the inability to authenticate without a password, OpenStack uses SSH key pairs. If you remember, in Chapter 3, Image Management, we discussed the need for cloud-init to be installed in a cloud image. Then, in Chapter 4, Network Management, we discussed how cloud-init would connect to the metadata service via the IP address provided by the router. One of the primary roles of this cloud-init process is to pull down the public SSH key that will be used for authentication. OpenStack provides a facility for you to manage your SSH key pairs so that you can select which will be used when you launch an instance. Let's start by generating a new key pair and listing it, as shown in the following commands:

undercloud# openstack keypair create my_keypair
-...
End of Section 3
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