Appendix A. New Releases

As you are aware by now, our book is based on the Juno release of OpenStack. However, there have been newer releases during the writing of this book. In this section, we shall look at the major differences among the last three releases of OpenStack. The latest release is Liberty, which was launched on October 15, 2015, right before the publication of this book.

The core concepts and services of the releases were very similar in all the three releases, and most changes have been related to advanced concepts and a new "Big Tent" approach to services. The focus of our book has been primarily around the basic or mandatory services. Nevertheless, it is worthwhile to know the differences among the releases so as to keep our knowledge level up to date.

"Big Tent" is the new approach to OpenStack services. Earlier, we had an "integrated release" that included multiple projects and was growing. However, the challenge in this was that not every new project made sense for every OpenStack cloud and not every new project was actually being deployed. Therefore, a new model called "Big Tent" has been adopted, in which there are projects that are considered to be core and mature and then there is everything else. Among the projects that are core include the Nova compute, Swift storage, Glance image, Horizon dashboard, Neutron network, and Keystone identity.

We will cover the following important topics in this appendix:

  • Understanding the newer releases
  • Changes in the installation procedures of the new releases
  • Upgrading from Juno

The releases

Kilo release is the 11th OpenStack release, and has multiple improvements and bug fixes mainly to enhance the core and Big Tent services of the OpenStack. This adds a few new services (as shown in the first chapter) in the area of infrastructure components.

Liberty is the 12th release of OpenStack, and has major improvements in the area of the governance, manageability, and extensibility aspects of OpenStack. The Liberty release added new services mainly in the field of governance and operationalization of OpenStack. This was done effectively to cater to the needs of enterprises and help them to efficiently and effectively manage their OpenStack-based private clouds.

The table in the next section summarizes the major additions/changes to the services of OpenStack that we have covered in this book. Most of these changes are on the advanced aspects of OpenStack and build upon the same concepts that were discussed earlier in the book. This is not an exhaustive list, and just shows the changes that were made to the top of the list based on the demand (or expectations) from the community itself.

Tip

If you are interested in all the new features and changes that were made in the releases, you should look at the release notes located at the following:

Kilo: https://wiki.openstack.org/wiki/ReleaseNotes/Kilo Liberty: https://wiki.openstack.org/wiki/ReleaseNotes/Liberty

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