/terraform-examples

Primary LanguageHCL

terraform-examples

A reference repository of Terraform with canonical and as-simple-as-possible demonstrations of Terraform functionality and features.

See here for docs.

Why?

At Container Solutions we find we regularly need chunks of Terraform to demonstrate something specific, such as:

  • A simple EC2 instance

  • A bespoke VPC

  • A Windows EC2 instance with an EBS volume

This might be to do a basic test of something, find an example to tinker with, or send to someone to get them going.

Usage

To help get started with these examples, there are scripts available in bin and in local folders.

Here's an example run:

$ git clone https://github.com/ContainerSolutions/terraform-examples
$ cd terraform-examples
$ cd aws/aws_vpc
$ ./run.sh
Input AWS_ACCESS_KEY_ID
KEY
Input AWS_SECRET_ACCESS_KEY
<secret>
...

If you want to skip the manual key/id inputs, then export them.

See bin/README.md for more information.

Where is...?

If you want to look for a specific example, try the index.

Sections

The code is generally divided up by provider, then resource, then whatever the example illustrates, eg local/null_resource/for_each, or aws/aws_instance/remote-exec/inline.

Other basic language features may be illustrated in their own folders, eg outputs/local_file/module.

Principles

The examples seek to be:

  • As simple as possible to illustrate the functionality

  • Self-contained (ie limited to one .tf file)

  • Clear (eg resource names are verbose and unambiguous)

Conventions

  • Where it makes sense, items that can be changed are prefaced with changeme_

  • In general, underscores are used in Terraform names over dashes

  • Naming Terraform resources:

    • use only lower case letters, numbers, and underscore
    • names should be unique between all examples
    • prefixed with: changeme_<example_name>_

  • name = attribute within the resource:

    • use only lower case letters, numbers, and dash
    • same as resource name, but with: s/_/-/g

  • For help with automated testing

    • where possible, add some way to enable 'left-over' resources to be cleaned up, eg provider default_tags of cs_terraform_examples in AWS provider blocks

Sources / Thanks To

Learn Terraform The Hard Way