https://github.com/magodo/tfadd

Generate valid Terraform configuration from state
https://github.com/magodo/tfadd

terraform

Last synced: 7 days ago
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Generate valid Terraform configuration from state

• Host: GitHub
• URL: https://github.com/magodo/tfadd
• Owner: magodo
• License: mpl-2.0
• Created: 2022-04-08T02:14:50.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2024-10-16T04:45:07.000Z (21 days ago)
• Last Synced: 2024-10-23T10:34:26.465Z (14 days ago)
• Topics: terraform
• Language: Go
• Homepage:
• Size: 7.38 MB
• Stars: 87
• Watchers: 6
• Forks: 9
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# 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](https://learn.hashicorp.com/tutorials/terraform/state-import?in=terraform/state&utm_source=WEBSITE&utm_medium=WEB_IO&utm_offer=ARTICLE_PAGE&utm_content=DOCS) 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 without `Optional+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`:

1. Prepare an empty [workspace](https://www.terraform.io/language/state/workspaces) (e.g. an empty directory for *local* backend)

1. Identify the existing resources to import, write down the empty resource block

1. (*partial mode* only) Run `tfadd init [providers...] > terraform.tf` to populate the Terraform setting to pin the provider version

1. Run `terraform init` to initialize the providers

1. Import the resources via `terraform import`

1. Run `tfadd state` or `tfadd 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.