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53 lines
2.1 KiB
Plaintext
53 lines
2.1 KiB
Plaintext
// Module included in the following assemblies:
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//
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// * orphaned
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[id="installation-about-custom_{context}"]
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= About the custom installation
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You can use the {product-title} installation program to customize four levels
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of the program:
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* {product-title} itself
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* The cluster platform
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* Kubernetes
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* The cluster operating system
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Changes to {product-title} and its platform are managed and supported, but
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changes to Kubernetes and the cluster operating system currently are not. If
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you customize unsupported levels program levels, future installation and
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upgrades might fail.
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When you select values for the prompts that the installation program presents,
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you customize {product-title}. You can further modify the cluster platform
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by modifying the `install-config.yaml` file that the installation program
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uses to deploy your cluster. In this file, you can make changes like setting the
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number of machines that the control plane uses, the type of virtual machine
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that the cluster deploys, or the CIDR range for the Kubernetes service network.
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It is possible, but not supported, to modify the Kubernetes objects that are injected into the cluster.
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A common modification is additional manifests in the initial installation.
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No validation is available to confirm the validity of any modifications that
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you make to these manifests, so if you modify these objects, you might render
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your cluster non-functional.
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[IMPORTANT]
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====
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Modifying the Kubernetes objects is not supported.
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====
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Similarly it is possible, but not supported, to modify the
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Ignition config files for the bootstrap and other machines. No validation is
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available to confirm the validity of any modifications that
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you make to these Ignition config files, so if you modify these objects, you might render
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your cluster non-functional.
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[IMPORTANT]
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====
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Modifying the Ignition config files is not supported.
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====
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To complete a custom installation, you use the installation program to generate
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the installation files and then customize them.
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The installation status is stored in a hidden
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file in the asset directory and contains all of the installation files.
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