Book Image

Production Ready OpenStack - Recipes for Successful Environments

By : Arthur Berezin
Book Image

Production Ready OpenStack - Recipes for Successful Environments

By: Arthur Berezin

Overview of this book

OpenStack is the most popular open source cloud platform used by organizations building internal private clouds and by public cloud providers. OpenStack is designed in a fully distributed architecture to provide Infrastructure as a Service, allowing us to maintain a massively scalable cloud infrastructure. OpenStack is developed by a vibrant community of open source developers who come from the largest software companies in the world. The book provides a comprehensive and practical guide to the multiple uses cases and configurations that OpenStack supports. This book simplifies the learning process by guiding you through how to install OpenStack in a single controller configuration. The book goes deeper into deploying OpenStack in a highly available configuration. You'll then configure Keystone Identity Services using LDAP, Active Directory, or the MySQL identity provider and configure a caching layer and SSL. After that, you will configure storage back-end providers for Glance and Cinder, which will include Ceph, NFS, Swift, and local storage. Then you will configure the Neutron networking service with provider network VLANs, and tenant network VXLAN and GRE. Also, you will configure Nova's Hypervisor with KVM, and QEMU emulation, and you will configure Nova's scheduler filters and weights. Finally, you will configure Horizon to use Apache HTTPD and SSL, and you will customize the dashboard's appearance.
Table of Contents (16 chapters)
Production Ready OpenStack - Recipes for Successful Environments
About the Author
About the Reviewers

Configuring Glance image caching

The glance-api service can be configured to cache images to local machine's disk. Once configured, the local cache automatically stores copies of images that are successfully retrieved and served. In this configuration, glance-api can run on multiple hosts without retrieving the same image from remote storage multiple times, leading the OpenStack environment to handle better scalability. Using Glance image caching is transparent to the user and doesn't change any of Glance's operations. The user does not know of the images are served from the backend storage or from glance-api caching mechanism.

Getting Ready

Before enabling and configuring Glance image caching, make sure that glance is configured and can successfully serve images.

How to do it…

We can configure Glance image caching by following these steps:

  1. Using the command openstack-config, edit glance-api configuration file, and set flavor to include cachemanagement using the paste_deploy section: