About disconnected installation 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.
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 Red Hat 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 OpenShift Container Platform image repository to the mirror registry in your disconnected environment, you can use the oc-mirror OpenShift CLI (
oc) plugin. The oc-mirror plugin is a single tool that mirrors all required OpenShift Container Platform content and other images to your mirror registry. The oc-mirror plugin is the preferred method for mirroring. - Alternately, you can use the
oc admcommand to mirror just release and catalog images for OpenShift Container Platform.