4장. Creating system images by using the RHEL image builder CLI


RHEL image builder is a tool for creating custom system images. To control RHEL image builder and create your custom system images, you can use the command line (CLI) or the web console interface.

4.1. Introducing the RHEL image builder command-line interface

You can use the RHEL image builder command-line interface (CLI) to create blueprints, by running the image-builder command with the suitable options and subcommands.

By default, you must run the image-builder command as a root user.

The workflow for the command line can be summarized as follows:

  1. Create a blueprint or export an existing blueprint definition to a plain text file.
  2. Optional: Edit this file in a text editor.
  3. Import the blueprint text file back into image builder.
  4. Run a compose to build an image from the blueprint.
  5. Export the image file to download it.

Apart from the basic subcommands to create a blueprint, the image-builder command offers many subcommands to examine the state of configured blueprints and composes.

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