ragedunicorn/terraform repository overview

⁠Terraform Alpine Docker Image

A lightweight Terraform CLI build on Alpine Linux. The official Terraform release is GPG- and checksum-verified at build time, then shipped as a non-root, single-purpose image with terraform as its entrypoint.

⁠Quick Start

# Pull latest version
docker pull ragedunicorn/terraform:latest

# Or pull a specific version
docker pull ragedunicorn/terraform:1.9.8-alpine3.22.1-1

# Show the version
docker run --rm ragedunicorn/terraform:latest version

# Run against a configuration in the current directory
docker run --rm -v "$(pwd)":/workspace ragedunicorn/terraform:latest init

On Windows, use the PowerShell form - ${PWD} with braces and the colon inside the quotes (without braces PowerShell parses $PWD: as a scope-qualified variable, as in $env:PATH, and rejects the argument):

# Run against a configuration in the current directory
docker run --rm -v "${PWD}:/workspace" ragedunicorn/terraform:latest init

⁠Features

• 🪶 Small footprint: minimal Alpine-based runtime image
• 🔐 Verified download: GPG signature and SHA256 checksum verified at build time
• 🎯 Single purpose: terraform is the entrypoint, nothing else bundled
• 🔒 Runs as non-root: executes as the unprivileged terraform user
• 🏗️ Multi-platform: supports linux/amd64 and linux/arm64
• 🧩 git + openssh + ca-certificates: ready for module sources and registry/backend HTTPS

⁠Usage Examples

⁠Standard workflow

docker run --rm -v "$(pwd)":/workspace ragedunicorn/terraform:latest init
docker run --rm -v "$(pwd)":/workspace ragedunicorn/terraform:latest plan
docker run --rm -v "$(pwd)":/workspace ragedunicorn/terraform:latest apply

PowerShell:

docker run --rm -v "${PWD}:/workspace" ragedunicorn/terraform:latest init
docker run --rm -v "${PWD}:/workspace" ragedunicorn/terraform:latest plan
docker run --rm -v "${PWD}:/workspace" ragedunicorn/terraform:latest apply

⁠Match host user for bind-mount ownership

docker run --rm --user "$(id -u):$(id -g)" \
  -v "$(pwd)":/workspace ragedunicorn/terraform:latest init

On Windows hosts this is not needed: Docker Desktop bind mounts do not carry Unix file ownership, so --user matching has no effect (and id does not exist in PowerShell).

⁠Persist the provider plugin cache

docker run --rm \
  -v "$(pwd)":/workspace \
  -v terraform-plugin-cache:/home/terraform/.terraform.d/plugin-cache \
  -e TF_PLUGIN_CACHE_DIR=/home/terraform/.terraform.d/plugin-cache \
  ragedunicorn/terraform:latest init

PowerShell:

docker run --rm `
  -v "${PWD}:/workspace" `
  -v terraform-plugin-cache:/home/terraform/.terraform.d/plugin-cache `
  -e TF_PLUGIN_CACHE_DIR=/home/terraform/.terraform.d/plugin-cache `
  ragedunicorn/terraform:latest init

⁠Pass cloud credentials via the environment

docker run --rm \
  -e AWS_ACCESS_KEY_ID -e AWS_SECRET_ACCESS_KEY -e AWS_REGION \
  -v "$(pwd)":/workspace ragedunicorn/terraform:latest apply

PowerShell:

docker run --rm `
  -e AWS_ACCESS_KEY_ID -e AWS_SECRET_ACCESS_KEY -e AWS_REGION `
  -v "${PWD}:/workspace" ragedunicorn/terraform:latest apply

⁠Runtime Notes

• Writable working directory. Terraform writes terraform.tfstate, .terraform.lock.hcl and .terraform/. Do not mount /workspace read-only.
• Bind-mount ownership. The container runs as the non-root terraform user; match your host user with --user "$(id -u):$(id -g)" so files stay yours.
• Each subcommand is a separate invocation (init → plan → apply).

⁠Tags

This image uses versioning that includes all component versions:

Format: {terraform_version}-alpine{alpine_version}-{build_number}

⁠Version Examples

• 1.9.8-alpine3.22.1-1 - Initial release with Terraform 1.9.8 and Alpine 3.22.1
• 1.9.8-alpine3.22.1-2 - Rebuild of the same versions (base CVE patch, fixes)
• 1.9.8-alpine3.22.2-1 - Alpine Linux patch update
• 1.10.0-alpine3.22.1-1 - Terraform version update (build resets to 1)

⁠License

This image's build tooling is MIT-licensed. The bundled Terraform binary is distributed by HashiCorp under the Business Source License 1.1 (BSL-1.1) - source-available, not OSI open source. See the HashiCorp LICENSE⁠. For a fully open source alternative, see OpenTofu⁠ (MPL-2.0).

⁠Links

• GitHub: https://github.com/RagedUnicorn/docker-terraform⁠
• Issues: https://github.com/RagedUnicorn/docker-terraform/issues⁠
• Releases: https://github.com/RagedUnicorn/docker-terraform/releases⁠