What is the tf.state file, what does it store? What is the difference between using Remote State and storing state in a Git repository?

The tf.state file is a Terraform state file that stores the current state of the infrastructure managed by Terraform. It contains information about resources that have been created, modified, or deleted, as well as their current attributes and relationships. This file is necessary for Terraform to track changes and apply new configurations correctly.

Difference between Remote State and storing state in Git:

• Local state (e.g., in Git):

  • Stored as a regular file in the repository.
  • Susceptible to conflicts when multiple users work in parallel.
  • No built-in locking, which can lead to state corruption.
  • Not recommended for team work and large projects.

• Remote State:

  • Stored in a remote backend (e.g., S3, Terraform Cloud, Consul).
  • Supports locking and versioning, preventing simultaneous modifications.
  • Provides centralized access and security.
  • Allows teams to work from a single source of truth.

Using Remote State is the best approach for team work and scalable infrastructure, as it minimizes the risks of conflicts and data loss.