butane ☆

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Description:
Translates human-readable Butane Configs into machine-readable Ignition Configs

Type: Formula | Latest Version: 0.25.1@0 | Tracked Since: Dec 17, 2025

Links: Homepage | formulae.brew.sh

Category: Devops

Tags: coreos ignition devops provisioning infrastructure yaml

Install: brew install butane

About:
Butane is a command-line utility that converts human-readable Butane Configs into machine-readable Ignition Configs. It simplifies the process of provisioning and configuring CoreOS-based operating systems. This tool enables declarative system configuration for immutable infrastructure deployments.

Key Features:

Translates YAML to JSON Ignition configs
Validates configuration syntax and structure
Supports Fedora CoreOS and RHEL CoreOS
Provides strict and strict-strict modes for validation
CLI tool with straightforward syntax

Use Cases:

Provisioning Fedora CoreOS nodes in bare-metal environments
Automating VM image configuration for cloud deployments
Defining declarative system setup for container orchestration clusters

Alternatives:

Ignition (native) – Butane is a pre-processor; Ignition is the runtime that applies the configs.
cloud-init – Cloud-init is for traditional distros; Butane/Ignition runs earlier in the boot process for immutable OSs.

License: Apache-2.0

Bottles available for: arm64_tahoe, arm64_sequoia, arm64_sonoma, sonoma, arm64_linux, x86_64_linux

Version History

Detected	Version	Rev	Change	Commit
Oct 10, 2025 2:55am		0	VERSION_BUMP	0b26f213
Sep 30, 2023 8:01am		0	VERSION_BUMP	05922599