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OpenStack Essentials

You're reading from   OpenStack Essentials Untangle the complexity of OpenStack clouds through this practical tutorial

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Product type Paperback
Published in Aug 2016
Publisher Packt
ISBN-13 9781786462664
Length 182 pages
Edition 2nd Edition
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Author (1):
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Dan Radez Dan Radez
Author Profile Icon Dan Radez
Dan Radez
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Toc

Table of Contents (15) Chapters Close

Preface 1. RDO Installation FREE CHAPTER 2. Identity Management 3. Image Management 4. Network Management 5. Instance Management 6. Block Storage 7. Object Storage 8. Telemetry 9. Orchestration 10. Docker 11. Scaling Horizontally 12. Monitoring 13. Troubleshooting Index

Launching a stack


Let's use the HOT hello world. The template can be passed to the Heat stack-create command as a local file, a URL to pull it from the network somewhere, or even as a Swift object if it was stored in Swift. It is important to validate a template. Pull down a copy of the template to your local filesystem.

Before you use this template, edit it and remove the constraints from admin_pass. It will make it easier to experiment with. Remove the lines under admin_pass that include constraints, length, and its description and both allowed_pattern and its description lines.

A template can be validated with Heat's template-validate command. Validating a template requires you to source a keystonerc file, use your overcloudrc file and then make sure that the template still validates with the changes you have made, as shown here:

undercloud# heat template-validate -f hello_world.yaml

Once the template validates, Heat will output a JSON representation of what it parsed from the template...

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