43 lines
1.8 KiB
Markdown
43 lines
1.8 KiB
Markdown
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# Flatcar-Related Build Files
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This directory contains files needed for building Flatcar Container Linux CAPI images.
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The following subdirectories exist:
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- `clc` - contains [Container Linux Config][1] files.
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- `ignition` - contains [Ignition][2] files generated from the CLC files in the `clc` directory.
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- `scripts` - contains scripts which are used by the various Flatcar builds.
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## Ignition Files
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Some Flatcar builds (e.g. QEMU) require Ignition files during OS installation. These files can be
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consumed directly from the `ignition` directory. Ignition files are generated from CLC files by the
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[Container Linux Config Transpiler][3].
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### Adding New Files
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To add a new Ignition file, do the following:
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1. Place a CLC YAML file with the desired config in `clc`.
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1. Add the name of the file without an extension to the `ignition_files` variable under the
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`gen-ignition` target in the [Makefile](../../../Makefile). For example, for a CLC file named
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`foo.yaml`, add `foo` to the Make target.
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1. Run `make gen-ignition` under `images/capi`. A new Ignition file is generated under `ignition`.
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1. Commit both the CLC file and the resulting Ignition file and open a PR to merge the changes.
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Once the changes are merged, the new Ignition file can be referenced in Flatcar builds and consumed
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as a raw file directly from GitHub.
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### Changing Existing Files
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To change an existing Ignition file, do the following:
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1. Edit the relevant CLC YAML file in `clc`.
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1. Run `make gen-ignition` under `images/capi`. The corresponding Ignition file is updated under
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`ignition`.
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1. Commit the changes and open a PR to merge them.
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[1]: https://flatcar.org/docs/latest/provisioning/cl-config/
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[2]: https://flatcar.org/docs/latest/provisioning/ignition/
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[3]: https://flatcar.org/docs/latest/provisioning/config-transpiler/
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