Upgrade Ignition, parse forward compatible, and drop Container Linux Configs #997
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* Both Flatcar Linux and Fedora CoreOS now support Ignition v2 (spec v3.x) for machine consumption * Drop support for Ignition v0.35.0 (Ignition spec v2.x) * Drop support for Container Linux Configs (the YAML format that rendered to Ignition v2.x JSON for Flatcar Linux)
* Recommend preparing Ignition configs external to Matchbox (e.g. with Terraform poseidon/terraform-provider-ct) * Document that Matchbox Rendering is discouraged * Add Butane Config support as a replacement for dropping Container Linux Config support. Perform Matchbox Go template evaluation, translation to Ignition, and parsing to a forward compatible version
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v3.1spec can be rendered asv3.3safely)For those still templating Container Linux Configs, you may be able to convert to Butane by prepending: