Book Image

OpenStack Cloud Computing Cookbook - Fourth Edition

By : Kevin Jackson, Cody Bunch, Egle Sigler, James Denton
Book Image

OpenStack Cloud Computing Cookbook - Fourth Edition

By: Kevin Jackson, Cody Bunch, Egle Sigler, James Denton

Overview of this book

This is the fourth edition of the industry-acclaimed OpenStack Cloud Computing Cookbook, created by four recognized OpenStack experts. It has now been updated to work with the latest OpenStack builds, using tools and processes based on their collective and vast OpenStack experience. OpenStack Open Source Cloud software is one of the most used cloud infrastructures to support a wide variety of use cases, from software development to big data analysis. It is developed by a thriving community of individual developers from around the globe and backed by most of the leading players in the cloud space today. We make it simple to implement, massively scalable, and able to store a large pool of data and networking resources. OpenStack has a strong ecosystem that helps you provision your cloud storage needs. Add OpenStack's enterprise features to reduce the cost of your business. This book will begin by showing you the steps to build up an OpenStack private cloud environment using Ansible. You'll then discover the uses of cloud services such as the identity service, image service, and compute service. You'll dive into Neutron, the OpenStack Networking service, and get your hands dirty with configuring networks, routers, load balancers, and more. You’ll then gather more expert knowledge on OpenStack cloud computing by managing your cloud's security and migration. After that, we delve into OpenStack Object storage and you’ll see how to manage servers and work with objects, cluster, and storage functionalities. Finally, you will learn about OpenStack dashboard, Ansible, Keystone, and other interesting topics.
Table of Contents (15 chapters)
OpenStack Cloud Computing Cookbook Fourth Edition
Contributors
Preface
Another Book You May Enjoy
Index

Deleting a host aggregate


When a host aggregate no longer applies in a given environment, it can be deleted. A host aggregate must have all hosts removed before it can be removed.

Getting ready

To delete a host aggregate, you will need the following information:

  • The openstack command-line client

  • The openrc file containing appropriate credentials

  • The name or ID of the aggregate

For the following example, we will delete the cookbook-threadripper-hosts aggregate.

How to do it…

The following commands are used to delete a host aggregate:

  1. First, list the existing aggregates:

    openstack aggregate list
    

    This will bring back the following output:

  2. Confirm that the aggregate has no hosts (Refer to the Removing a compute host from a host aggregate recipe if necessary):

    openstack aggregate show cookbook-threadripper-hosts
    

    This will bring back the following output:

  3. Now we can delete the aggregate with the following command:

    openstack aggregate delete cookbook-threadripper-hosts
    

    Note

    This command produces no output...