agent-install-about-mirroring-for-disconnected-registry.adoc

About mirroring the {product-title} image repository for a disconnected registry

To use mirror images for a disconnected installation with the Agent-based Installer, you must modify the install-config.yaml file.

You can mirror the release image by using the output of either the oc adm release mirror or oc mirror command. This is dependent on which command you used to set up the mirror registry.

The following example shows the output of the oc adm release mirror command.

$ oc adm release mirror

Example output

To use the new mirrored repository to install, add the following
section to the install-config.yaml:

imageContentSources:

mirrors:
virthost.ostest.test.metalkube.org:5000/localimages/local-release-image
source: quay.io/openshift-release-dev/ocp-v4.0-art-dev
mirrors:
virthost.ostest.test.metalkube.org:5000/localimages/local-release-image
source: registry.ci.openshift.org/ocp/release

The following example shows part of the imageContentSourcePolicy.yaml file generated by the oc-mirror plugin. The file can be found in the results directory, for example oc-mirror-workspace/results-1682697932/.

Example imageContentSourcePolicy.yaml file

spec:
  repositoryDigestMirrors:
  - mirrors:
    - virthost.ostest.test.metalkube.org:5000/openshift/release
    source: quay.io/openshift-release-dev/ocp-v4.0-art-dev
  - mirrors:
    - virthost.ostest.test.metalkube.org:5000/openshift/release-images
    source: quay.io/openshift-release-dev/ocp-release