How to Share Terraform State (Tutorial)

Terraform state sharing is a method of making infrastructure data from one Terraform configuration accessible to another, facilitating the reuse of resource IDs, outputs, and metadata without duplicating infrastructure. This practice is particularly relevant in real-world scenarios where multiple teams work on separate Terraform configurations within a shared environment, necessitating the sharing of Terraform state. However, it introduces dependencies that should be managed carefully to avoid complications. Sharing state can be done implicitly through data sources, output values, and variables, or explicitly by sharing the actual state file using terraform_remote_state. Best practices suggest minimizing state sharing, treating shared state as a contract, and preferring stable data and implicit sharing methods. Additionally, using platform-specific features such as those offered by Spacelift can enhance security and manageability. It's crucial to avoid giving write access to shared state files to prevent potential issues. This approach allows for more flexible and efficient infrastructure management, albeit with necessary caution to maintain stability and security.

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