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Getting Started with Terraform

You're reading from   Getting Started with Terraform Infrastructure automation made easy

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Product type Paperback
Published in Jan 2017
Publisher Packt
ISBN-13 9781786465108
Length 206 pages
Edition 1st Edition
Languages
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Author (1):
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Kirill Shirinkin Kirill Shirinkin
Author Profile Icon Kirill Shirinkin
Kirill Shirinkin
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Table of Contents (9) Chapters Close

Preface 1. Infrastructure Automation FREE CHAPTER 2. Deploying First Server 3. Resource Dependencies and Modules 4. Storing and Supplying Configuration 5. Connecting with Other Tools 6. Scaling and Updating Infrastructure 7. Collaborative Infrastructure 8. Future of Terraform

Configuring data sources

Data sources are very similar to regular resources. The main difference is that they are read-only. You can't always (actually, far from it) you can have the complete infrastructure in your Terraform templates. It is often the case that some resources do already exist and you don't have much control over them. You still need to use them inside your Terraform templates, though. That's when data sources become handy.

In the Terraform documentation for each provider, there is a list of data sources (if any are available). They are configured almost the same as regular resources, with some differences.

Let's try them out in our template. There is a feature named VPC Peering in AWS. It allows connecting two different VPC in a way that instances inside both can talk to each other. We could have a VPC provided by other team, responsible for management layer for our infrastructure (artifacts storage, DNS, and so on). In order to access it from VPC we created...

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