Awesome
tfadd
Generate valid Terraform configuration from state.
Install
go install github.com/magodo/tfadd@latest
Intro
The goal of this tool is to improve the import experience of Terraform, that rather than constructing the configurations from scratch, tfadd
(try its best to) provide users a valid configuration automatically.
The valid here means the generated configuration should raise no error and show no diff during
terraform plan
.
Currently to generate the state, the tool supports full mode (with -full
) or partial mode (by default).
-
In full mode,
tfadd
outputs all non-computed properties in the generated config. The generated config might be invalid for kinds of reasons, where manual modification is needed. But the benefit is that it works for any Terraform provider. -
In partial mode,
tfadd
only outputs properties withoutOptional+Computed
properties, with cross property constraints taken into consideration. This mode aims aims to generate a valid Terraform config. Currently, this mode can only works for the following providers:Name Version hashicorp/aws v5.64.0 hashicorp/azurerm v4.5.0 hashicorp/google v6.0.1 azure/azapi v2.0.1
Usage
The typical usage is to use tfadd
together with terraform import
:
- Prepare an empty workspace (e.g. an empty directory for local backend)
- Identify the existing resources to import, write down the empty resource block
- (partial mode only) Run
tfadd init [providers...] > terraform.tf
to populate the Terraform setting to pin the provider version - Run
terraform init
to initialize the providers - Import the resources via
terraform import
- Run
tfadd state
ortfadd state -full
to generate the configuration
Limitation
- Only the managed resources of the root module in the state file will get the config generated, any child module will be skipped.
- No inter-resource dependency generated.