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CP417-OSDOCS-15449: CQA updates disconnected install mirroring index

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“Shauna Diaz”
2025-08-27 10:52:20 -04:00
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disconnected/mirroring/index.adoc
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toc::[]
You can use a mirror registry to ensure that your clusters only use container images that satisfy your organizational controls on external content. Before you install a cluster on infrastructure that you provision in a restricted network, you must mirror the required container images into that environment. To mirror container images, you must have a registry for mirroring.
As a cluster administrator, you can use a mirror registry to ensure that your clusters only use container images that satisfy your organizational controls on external content.
[id="creating-mirror-registry"]
== Creating a mirror registry
If you already have a container image registry, such as {quay}, you can use it as your mirror registry. If you do not already have a registry, you can xref:../../disconnected/mirroring/installing-mirroring-creating-registry.adoc#installing-mirroring-creating-registry[create a mirror registry using the _mirror registry for Red{nbsp}Hat OpenShift_].
[id="mirroring-images-disconnected-install"]
== Mirroring images for a disconnected installation
You can use one of the following procedures to mirror your {product-title} image repository to your mirror registry:
* xref:../../disconnected/mirroring/installing-mirroring-installation-images.adoc#installing-mirroring-installation-images[Mirroring images for a disconnected installation by using the oc adm command]
* xref:../../disconnected/mirroring/installing-mirroring-disconnected.adoc#installing-mirroring-disconnected[Mirroring images for a disconnected installation using the oc-mirror plugin]
include::modules/installing-mirroring-disconnected-con.adoc[leveloffset=+1]

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modules/installing-mirroring-disconnected-con.adoc Normal file
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// Module included in the following assemblies:
//
// * disconnected/mirroring/index.adoc
:_mod-docs-content-type: CONCEPT
[id="installing-mirroring-disconnected-con_{context}"]
= Mirror registries for installing clusters in disconnected environments
You must mirror required container images into a disconnected environment before you can install and provision a cluster there. To mirror those container images, you must have a mirror registry. Consider the following options for creating and using a mirror registry:
* If you already have a container image registry, such as {quay}, you can use it as your mirror registry. If you do not already have a registry, you must create one.
* After you establish your registry, you need mirroring tools. To mirror your {product-title} image repository to the mirror registry in your disconnected environment, you can use the oc-mirror {oc-first} plugin. The oc-mirror plugin is a single tool that mirrors all required {product-title} content and other images to your mirror registry. The oc-mirror plugin is the preferred method for mirroring.
* Alternately, you can use the `oc adm` command to mirror just release and catalog images for {product-title}.