Terraform me up

What benefits brings Infrastructure as Code (IaC)?

• It's encrypted
• It's reusable
• It's predictable
• It's unpredictable

What should I use if I want to reference an existing resource from my AWS account?

• Data Resource
• Resource
• Data Source
• Source

Can I run terraform apply BEFORE terraform plan?

• Yes, apply will run a plan in this case.
• Yes although it will be a dry run
• Z+ Infra Police will come after you
• No, it is not possible

Why should I care about the famous "backend" block for remote state?

• Changes here will destroy your infrastructure
• It's important to have a shared state in the team

• It's mandatory, because it will create the state bucket

• Needs to be removed to share the state

What happens if I run several times?

terraform plan -out=plan.out

terraform apply plan.out

• Terraform will create new infrastructure everytime since we are creating a new plan each time.
• Terraform is omnipotent, who knows
• Terraform is idempotent, will provision once, and does nothing for the rest

• Terraform will re-create stateful resources, as the state of the resource can change

I am using module that contains a provider, but I don't need it anymore, what's the best approach to proceed?

• Use terraform destroy, with the target flag to select that module exclusively
• Use terraform destroy
• Remove from the code and apply it
• Go to AWS console and delete it

We have a bucket as backend for our state, some Terraform code, a lot of free time and a couple of ideas. After a while, the apply failed due to credentials and the state is broken... what can we do?

• Pray
• Remove all the code and start again
• Rollback to a  previous state version
• Go on holidays

I have a RDS Database and I need it to be as fast as possible so frontend will show some data for our customers, in which subnet does make sense to have it?

• Tier1, it is the closest to the customers!!
• Tier2, closest to the application!!
• Tier3, in the inner circle of protection
• Tier4... woot?

Data sources allow us to fetch data from AWS resources. Generally, which of the following fields CAN NOT be used as argument? 

• Amazon Resource Name (ARN)
• IP addresses
• Tags
• Name of the resource