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All code used during my All Day DevOps talk

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# Infrastructure code for "addo-demo"

This repository contains infrastructure as Terraform configurations which were automatically generated from blueprint created using [cloudcraft.co](https://cloudcraft.co/app).

[Terragrunt](https://github.com/gruntwork-io/terragrunt) is used to work with Terraform configurations which allows to orchestrate dependent layers, update arguments dynamically and keep configurations [DRY](https://en.wikipedia.org/wiki/Don%27t_repeat_yourself).

## Table of Contents

1. [Quick start](#quick-start)
1. [Configure access to AWS account](#configure-access-to-aws-account)
1. [Create and manage your infrastructure](#create-and-manage-your-infrastructure)
1. [References](#references)
1. [About modules.tf](#about-modulestf)

## Quick start

1. [Install Terraform 0.12 or newer](https://www.terraform.io/intro/getting-started/install.html)
1. [Install Terragrunt 0.19 or newer](https://github.com/gruntwork-io/terragrunt#install-terragrunt)
1. Optionally, [install pre-commit hooks](https://pre-commit.com/#install) to keep Terraform formatting and documentation up-to-date.

If you are using macOS you can install all dependencies using [Homebrew](https://brew.sh/):

$ brew install terraform terragrunt pre-commit

## Configure access to AWS account

The recommended way to configure access credentials to AWS account is using environment variables:

```
$ export AWS_DEFAULT_REGION=eu-west-1
$ export AWS_ACCESS_KEY_ID=...
$ export AWS_SECRET_ACCESS_KEY=...
```

Alternatively, you can edit `common/main_providers.tf` and use another authentication mechanism as described in [AWS provider documentation](https://www.terraform.io/docs/providers/aws/index.html#authentication).

## Create and manage your infrastructure

Infrastructure consists of multiple layers (autoscaling, s3-bucket, alb, ...) where each layer is described using one [Terraform module](https://www.terraform.io/docs/configuration/modules.html) with `inputs` arguments specified in `terragrunt.hcl` in respective layer's directory.

Navigate through layers to review and customize values inside `inputs` block.

There are two ways to manage infrastructure (slower&complete, or faster&granular):
- **Region as a whole (slower&complete).** Run this command to create infrastructure in all layers in a single region:

```
$ cd eu-west-1
$ terragrunt apply-all
```

- **As a single layer (faster&granular).** Run this command to create infrastructure in a single layer (eg, `autoscaling`):

```
$ cd eu-west-1/autoscaling
$ terragrunt apply
```

After the confirmation your infrastructure should be created.

## References

* [Terraform documentation](https://terraform.io/) and [Terragrunt documentation](https://github.com/gruntwork-io/terragrunt/blob/master/README.md) for all available commands and features.
* [Terraform AWS modules](https://github.com/terraform-aws-modules/).
* [Terraform modules registry](https://registry.terraform.io/).

## About modules.tf

[modules.tf](https://github.com/antonbabenko/modules.tf-lambda) is an open-source project by [Anton Babenko](https://github.com/antonbabenko), and, yes, you can contribute, too:
1. Questions, bugs and feature-requests - [open an issue](https://github.com/antonbabenko/modules.tf-lambda).
1. [Become a sponsor to @antonbabenko](https://github.com/sponsors/antonbabenko/).
1. You are always welcome to share, star, like, tweet, follow!

[![@antonbabenko](https://img.shields.io/twitter/follow/antonbabenko.svg?style=flat&label=Follow%20@antonbabenko%20on%20Twitter)](https://twitter.com/antonbabenko) 
[![@antonbabenko](https://img.shields.io/github/followers/antonbabenko?style=flat&label=Follow%20@antonbabenko%20on%20Github)](https://github.com/antonbabenko) 
[![modules.tf-lambda](https://img.shields.io/github/stars/antonbabenko/modules.tf-lambda?style=flat&label=Star%20modules.tf-lambda%20on%20Github)](https://github.com/antonbabenko/modules.tf-lambda)

All content, including [Terraform AWS modules](https://github.com/terraform-aws-modules/) used in these configurations, is released under the MIT License.

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