coreos-ct ☆
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Description:
Convert a Container Linux Config into Ignition
Type: Formula  |  Latest Version: 0.9.4@0  |  Tracked Since: Dec 17, 2025
Links: Homepage  |  formulae.brew.sh
Category: Devops
Tags: coreos flatcar ignition provisioning devops container-linux
Install: brew install coreos-ct
About:
CoreOS Container Linux Config (CT) is a tool that converts Container Linux Configs into Ignition Configs. It allows users to write human-readable YAML configurations that are then transpiled into the JSON format required by Ignition for provisioning CoreOS/Flatcar machines. This provides a more stable and declarative approach to system configuration during the initial boot process.
Key Features:
  • Transpiles YAML Container Linux Configs to JSON Ignition Configs
  • Validates configuration syntax before conversion
  • Provides a declarative approach to machine provisioning
  • Integrates with the CoreOS/Flatcar boot process
Use Cases:
  • Automating server provisioning for CoreOS/Flatcar clusters
  • Generating Ignition configs from version-controlled YAML files
  • Migrating legacy CoreOS configurations to newer Ignition standards
Alternatives:
  • Butane – Butane is the successor to coreos-ct, specifically designed for newer Flatcar Linux versions and Ignition spec 3.x.
License: Apache-2.0
Bottles available for: arm64_tahoe, arm64_sequoia, arm64_sonoma, arm64_ventura, arm64_monterey, arm64_big_sur, sonoma, ventura, monterey, big_sur, catalina, arm64_linux, x86_64_linux
Version History
Detected Version Rev Change Commit
Sep 14, 2025 1:29am 0 VERSION_BUMP b243aad6
Sep 30, 2023 5:56pm 0 VERSION_BUMP b3b40b0b
Nov 25, 2022 12:52am 0 VERSION_BUMP b98a801b
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