terraform-inventory を Homebrew, Nix, zypper でインストール

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• terraform-inventory

プロジェクトの歴史

The adammck/terraform-inventory repository was created on GitHub in September 2014, making it one of the older Terraform-adjacent tools in this batch. Its README describes it as a small Go app that generates a dynamic Ansible inventory from a Terraform state file so users can spawn instances with Terraform and then reprovision them with Ansible.

The project released v0.1 and v0.2 in September 2014 and continued adding provider support across cloud and virtualization platforms, including AWS, DigitalOcean, Google Compute Engine, OpenStack, Docker, VMware, Hetzner Cloud, Linode, Proxmox, and others. By the README's own note, the library was stable but had been neglected because the maintainer no longer used Ansible at work.

採用の歴史

terraform-inventory reflects an important early Terraform adoption pattern: Terraform handled infrastructure creation, while Ansible still handled configuration management. Before provider ecosystems, cloud-init practices, and Terraform-native workflows matured, bridging Terraform state into Ansible inventory solved a practical day-two automation problem.

The input package facts list Homebrew, Nix, and zypper packaging, and the README includes a Homebrew badge and Homebrew installation instructions. That packaging footprint is notable for an older Go utility whose primary interface is simply being executable by `ansible-playbook` as an inventory script.

使われ方

The basic usage is to point Ansible at the `terraform-inventory` executable with `--inventory-file`; the tool discovers `terraform.tfstate`, pulls remote state from a Terraform directory, or honors environment variables such as `TF_STATE` and `TI_TFSTATE`. It maps Terraform resource names, provider metadata, and selected IP fields into Ansible host groups.

The README documents additional environment variables such as `TF_KEY_NAME` and `TF_HOSTNAME_KEY_NAME` for choosing private IPs or alternate hostnames. That interface is very much of the Unix CLI style: no daemon, no central service, just state in and inventory JSON out.

パッケージ好きにとっての重要性

terraform-inventory matters historically because it captures the moment when Terraform and Ansible were commonly paired rather than treated as competing tools. For package nerds, it is a compact example of how early infrastructure CLIs were distributed: a static-ish Go binary, release archives, Homebrew formula, and distro packages.

It is less central in newer Terraform workflows, but its design remains recognizable: read Terraform state, produce another tool's expected machine-readable interface, and make the glue installable from a package manager.

タイムライン

• 2014: GitHub repository created.
• 2014: v0.1 and v0.2 releases published.
• 2015: v0.3 through v0.6 pre-releases published.
• 2019: v0.9 released.
• 2021: v0.10 listed as the latest GitHub release during research.
• 2025: Repository still showed recent push activity during research.

Related projects

• The README positions terraform-inventory between Terraform and Ansible. It also names many supported Terraform providers, reflecting the project's role as a provider-state adapter rather than a Terraform provider itself.

ソース

• https://api.github.com/repos/adammck/terraform-inventory
• https://github.com/adammck/terraform-inventory#readme
• https://github.com/adammck/terraform-inventory/releases
• source_facts.package-manager