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Occasionally, changes are made to Butane configuration specifications that break backward compatibility or add new functionality. While this is not a concern for running machines, since Ignition only runs one time during first boot, it is a concern for those who maintain configuration files.
For details about changes in new versions of Butane config specs, see the guide for your specific config variant:
- Fedora CoreOS (
fcos) - Flatcar (
flatcar) - OpenShift (
openshift) - RHEL for Edge (
r4e)