Terraform?

Tool for building, changing, and versioning infrastructure.

Infrastructure as code

Open-source

Terraform is a free and open-source, written in Go

https://github.com/hashicorp/terraform

HCL

Terraform uses its own configuration language, but you have an option to use plain JSON

Why use HCL

• ✅ syntax highlight
• ✅ type checks
• ✅ inline help and suggestions
• ☑️ learn new language

Providers

Terraform is designed to be extendable, so every service implemented as a provider

Providers and plugins are downloaded automatically into .terraform folder during terraform init

Workflow

• terraform init
• terraform plan -out tfplan
• terraform apply tfplan
• ...
• PROFIT

terraform init

terraform plan

terraform apply

Workspaces

Multiple workspaces to separate deployments but re-use same infrastructure config

• terraform workspace list
• ... new
• ... select
• ... delete

Workspaces

Using workspace name

Modules

State

.terraform/terraform.tfstate

Remote states

Remote state

TF_LOG=TRACE

Install

root.tf

www/bucket.tf

www/policy.tf

root.tf

www/bucket.tf

src/index.html.tmpl

src/error.html.tmpl

www/files.tf

root.tf

Deploy

Hello World!

Error Page

CI/CD Demo

...

Thank you