How to Migrate from Terraform to OpenTofu Without Breaking Your Infrastructure

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OpenTofu, a line-for-line fork of Terraform 1.5, allows teams to switch from Terraform with minimal code changes, as existing .tf files and state files remain fully compatible. The migration process centres on replacing the Terraform CLI binary with the OpenTofu equivalent and running tofu init and tofu plan against the existing state. A successful migration is confirmed when tofu plan returns an empty diff, meaning no infrastructure changes are detected. Before running any OpenTofu commands, engineers are advised to back up the state file and dependency lock file, since the state is the only irreplaceable artifact linking code to real cloud resources. Most Terraform-specific constructs, including the terraform{} block, TF_-prefixed environment variables, and remote backend configuration, are retained in OpenTofu, requiring no changes to existing CI pipelines or configuration files.

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