GCS backend configuration in Terraform - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of configuring a GCS backend in Terraform?

A GCS backend stores Terraform state files remotely in Google Cloud Storage, enabling team collaboration and state locking.

beginner

Which key information must be provided to configure a GCS backend in Terraform?

You must provide the bucket name, prefix (optional path inside the bucket), and optionally the credentials or project details.

intermediate

How does Terraform ensure state consistency when using a GCS backend?

Terraform uses object locking features of GCS to prevent concurrent state changes and maintain consistency.

beginner

Show a minimal valid Terraform configuration snippet for a GCS backend.

terraform { backend "gcs" { bucket = "my-terraform-state" prefix = "terraform/state" } }

intermediate

Why is it recommended to enable versioning on the GCS bucket used for Terraform state?

Versioning allows recovery of previous state files if the current state is corrupted or accidentally deleted.

What does the 'prefix' attribute specify in a GCS backend configuration?

A The folder path inside the bucket where state files are stored

B The name of the GCS bucket

C The Google Cloud project ID

D The credentials file path

The 'prefix' defines the path inside the bucket to organize state files.

Which command initializes Terraform with the configured GCS backend?

A terraform apply

B terraform init

C terraform plan

D terraform validate

'terraform init' sets up the backend and downloads necessary plugins.

What is a key benefit of using a remote backend like GCS for Terraform state?

A Runs Terraform faster

B Automatically creates resources

C Encrypts Terraform code

D Enables team collaboration and state locking

Remote backends allow multiple users to share and lock state files safely.

Which of these is NOT required in a GCS backend block?

A bucket

B prefix

C region

D credentials (optional)

'region' is not a required attribute for GCS backend configuration.

What happens if you do not enable versioning on the GCS bucket used for Terraform state?

A You cannot recover previous state versions if overwritten

B Terraform will not work

C State files will be encrypted automatically

D Terraform will create multiple buckets

Without versioning, old state files are lost if overwritten or deleted.

Explain how to configure a GCS backend in Terraform and why it is useful.

Think about storing state remotely for teamwork.

Describe best practices when using GCS as a Terraform backend.

Consider safety and organization of state files.