Book Image

OpenStack Administration with Ansible

By : Walter Bentley
Book Image

OpenStack Administration with Ansible

By: Walter Bentley

Overview of this book

Most organizations are seeking methods to improve business agility because they have realized just having a cloud is not enough. Being able to improve application deployments, reduce infrastructure downtime, and eliminate daily manual tasks can only be accomplished through some sort of automation. Packed with real-world OpenStack administrative tasks, this book will walk you through working examples and explain how these tasks can be automated using one of the most popular open source automation tools—Ansible. We will start with a brief overview of OpenStack and Ansible and highlight some best practices. Each chapter will provide an introduction to handling various Cloud Operator administration tasks such as creating multiple users/tenants, setting up Multi-Tenant Isolation, customizing your clouds quotas, taking instance snapshots, evacuating compute hosts for maintenance, and running cloud health checks, and a step-by-step tutorial on how to automate these tasks with Ansible.
Table of Contents (18 chapters)
OpenStack Administration with Ansible
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Preface
Index

Playbook and role review


To get to it right away, we can start from the top with the role we created, called create-users-env. The completed role and the file named main.yml is located in the adjust-quotas/tasks directory and it looks similar to the following code:

---

- name: Retrieve tenantID
shell: keystone --os-username={{ OS_USERNAME }} --os-password={{ OS_PASSWORD }} --os-tenant-name={{ OS_TENANT_NAME }} --os-auth-url={{ OS_AUTH_URL }}
tenant-list | awk '/ {{ item }} / { print $2 }'
with_items: tenantname
register: tenantid

- name: Adjust tenant quotas
command: nova --os-username={{ OS_USERNAME }} --os-password={{ OS_PASSWORD }} --os-tenant-name={{ OS_TENANT_NAME }} --os-auth-url={{ OS_AUTH_URL }} 
quota-update {{ item.0 }} {{ item.1.stdout }}
with_together:
    - qoptions
    - tenantid.results

The corresponding variable file named main.yml, located in the adjust-quota/vars directory will look similar to this:

---
qoptions: [ '--cores 30', '--instances 20 --cores 20', '--instances...