5.4. Mirroring the OpenShift Container Platform image repository

Procedure

1. Use the Red Hat OpenShift Container Platform Upgrade Graph visualizer and update planner to plan an upgrade from one version to another. The OpenShift Upgrade Graph provides channel graphs and a way to confirm that there is an update path between your current and intended cluster versions.

2. Set the required environment variables:

   1. Export the release version:

      $ export OCP_RELEASE=<release_version>

      For <release_version>, specify the tag that corresponds to the version of OpenShift Container Platform to which you want to upgrade, such as 4.5.4.

   2. Export the local registry name and host port:

      $ LOCAL_REGISTRY='<local_registry_host_name>:<local_registry_host_port>'

      For <local_registry_host_name>, specify the registry domain name for your mirror repository, and for <local_registry_host_port>, specify the port that it serves content on.

   3. Export the local repository name:

      $ LOCAL_REPOSITORY='<local_repository_name>'

      For <local_repository_name>, specify the name of the repository to create in your registry, such as ocp4/openshift4.

   4. Export the name of the repository to mirror:

      $ PRODUCT_REPO='openshift-release-dev'

      For a production release, you must specify openshift-release-dev.

   5. Export the path to your registry pull secret:

      $ LOCAL_SECRET_JSON='<path_to_pull_secret>'

      For <path_to_pull_secret>, specify the absolute path to and file name of the pull secret for your mirror registry that you created.

      注意

      If your cluster uses an ImageContentSourcePolicy object to configure repository mirroring, you can use only global pull secrets for mirrored registries. You cannot add a pull secret to a project.

   6. Export the release mirror:

      $ RELEASE_NAME="ocp-release"

      For a production release, you must specify ocp-release.

   7. Export the type of architecture for your server, such as x86_64.:

      $ ARCHITECTURE=<server_architecture>

   8. Export the path to the directory to host the mirrored images:

      $ REMOVABLE_MEDIA_PATH=<path> 1

      1

      Specify the full path, including the initial forward slash (/) character.

3. Review the images and configuration manifests to mirror:

   $ oc adm release mirror -a ${LOCAL_SECRET_JSON} --to-dir=${REMOVABLE_MEDIA_PATH}/mirror quay.io/${PRODUCT_REPO}/${RELEASE_NAME}:${OCP_RELEASE}-${ARCHITECTURE} --dry-run

4. Mirror the version images to the internal container registry.

   • If your mirror host does not have internet access, take the following actions:

     1. Connect the removable media to a system that is connected to the internet.

     2. Mirror the images and configuration manifests to a directory on the removable media:

        $ oc adm release mirror -a ${LOCAL_SECRET_JSON} --to-dir=${REMOVABLE_MEDIA_PATH}/mirror quay.io/${PRODUCT_REPO}/${RELEASE_NAME}:${OCP_RELEASE}-${ARCHITECTURE}

     3. Take the media to the restricted network environment and upload the images to the local container registry.

        $ oc image mirror  -a ${LOCAL_SECRET_JSON} --from-dir=${REMOVABLE_MEDIA_PATH}/mirror "file://openshift/release:${OCP_RELEASE}*" ${LOCAL_REGISTRY}/${LOCAL_REPOSITORY} 1

        1

        For REMOVABLE_MEDIA_PATH, you must use the same path that you specified when you mirrored the images.

   • If the local container registry and the cluster are connected to the mirror host, directly push the release images to the local registry and apply the config map to the cluster by using following command:

     $ oc adm release mirror -a ${LOCAL_SECRET_JSON} --from=quay.io/${PRODUCT_REPO}/${RELEASE_NAME}:${OCP_RELEASE}-${ARCHITECTURE} \
       --to=${LOCAL_REGISTRY}/${LOCAL_REPOSITORY} --apply-release-image-signature

     注意

     If you include the --apply-release-image-signature option, do not create the config map for image signature verification.