Chapter 3. Using the Cluster Samples Operator with an alternate registry

1. Download your registry.redhat.io pull secret from Red Hat OpenShift Cluster Manager.

2. Make a copy of your pull secret in JSON format by running the following command:

   $ cat ./pull-secret | jq . > <path>/<pull_secret_file_in_json> 1

   1

   Specify the path to the folder to store the pull secret in and a name for the JSON file that you create.

   Example pull secret

   {
     "auths": {
       "cloud.openshift.com": {
         "auth": "b3BlbnNo...",
         "email": "you@example.com"
       },
       "quay.io": {
         "auth": "b3BlbnNo...",
         "email": "you@example.com"
       },
       "registry.connect.redhat.com": {
         "auth": "NTE3Njg5Nj...",
         "email": "you@example.com"
       },
       "registry.redhat.io": {
         "auth": "NTE3Njg5Nj...",
         "email": "you@example.com"
       }
     }
   }

3. Generate the base64-encoded user name and password or token for your mirror registry by running the following command:

   $ echo -n '<user_name>:<password>' | base64 -w0 1

   1

   For <user_name> and <password>, specify the user name and password that you configured for your registry.

   Example output

   BGVtbYk3ZHAtqXs=

4. Edit the JSON file and add a section that describes your registry to it:

     "auths": {
       "<mirror_registry>": { 1
         "auth": "<credentials>", 2
         "email": "you@example.com"
       }
     },

   1

   Specify the registry domain name, and optionally the port, that your mirror registry uses to serve content. For example, registry.example.com or registry.example.com:8443

   2

   Specify the base64-encoded user name and password for the mirror registry.

   Example modified pull secret

   {
     "auths": {
       "registry.example.com": {
         "auth": "BGVtbYk3ZHAtqXs=",
         "email": "you@example.com"
       },
       "cloud.openshift.com": {
         "auth": "b3BlbnNo...",
         "email": "you@example.com"
       },
       "quay.io": {
         "auth": "b3BlbnNo...",
         "email": "you@example.com"
       },
       "registry.connect.redhat.com": {
         "auth": "NTE3Njg5Nj...",
         "email": "you@example.com"
       },
       "registry.redhat.io": {
         "auth": "NTE3Njg5Nj...",
         "email": "you@example.com"
       }
     }
   }

1. Review the OpenShift Container Platform downloads page to determine the version of OpenShift Container Platform that you want to install and determine the corresponding tag on the Repository Tags page.

2. Set the required environment variables:

   1. Export the release version:

      $ OCP_RELEASE=<release_version>

      For <release_version>, specify the tag that corresponds to the version of OpenShift Container Platform to install, 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.

   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 cluster:

      $ ARCHITECTURE=<cluster_architecture> 1

      1

      Specify the architecture of the cluster, such as x86_64, aarch64, s390x, or ppc64le.

   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. Mirror the version images to the mirror 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. Review the images and configuration manifests to mirror:

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

     3. Record the entire imageContentSources section from the output of the previous command. The information about your mirrors is unique to your mirrored repository, and you must add the imageContentSources section to the install-config.yaml file during installation.

     4. Mirror the images 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}

     5. 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.

        Important

        Running oc image mirror might result in the following error: error: unable to retrieve source image. This error occurs when image indexes include references to images that no longer exist on the image registry. Image indexes might retain older references to allow users running those images an upgrade path to newer points on the upgrade graph. As a temporary workaround, you can use the --skip-missing option to bypass the error and continue downloading the image index. For more information, see Service Mesh Operator mirroring failed.

   • If the local container registry is connected to the mirror host, take the following actions:

     1. Directly push the release images to the local registry 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}/${LOCAL_REPOSITORY} \
             --to-release-image=${LOCAL_REGISTRY}/${LOCAL_REPOSITORY}:${OCP_RELEASE}-${ARCHITECTURE}

        This command pulls the release information as a digest, and its output includes the imageContentSources data that you require when you install your cluster.

     2. Record the entire imageContentSources section from the output of the previous command. The information about your mirrors is unique to your mirrored repository, and you must add the imageContentSources section to the install-config.yaml file during installation.

        Note

        The image name gets patched to Quay.io during the mirroring process, and the podman images will show Quay.io in the registry on the bootstrap virtual machine.

4. To create the installation program that is based on the content that you mirrored, extract it and pin it to the release:

   • If your mirror host does not have internet access, run the following command:

     $ oc adm release extract -a ${LOCAL_SECRET_JSON} --icsp-file=<file> --command=openshift-install "${LOCAL_REGISTRY}/${LOCAL_REPOSITORY}:${OCP_RELEASE}-${ARCHITECTURE}" \
     --insecure=true 1

     1

     Optional: If you do not want to configure trust for the target registry, add the --insecure=true flag.

   • If the local container registry is connected to the mirror host, run the following command:

     $ oc adm release extract -a ${LOCAL_SECRET_JSON} --command=openshift-install "${LOCAL_REGISTRY}/${LOCAL_REPOSITORY}:${OCP_RELEASE}-${ARCHITECTURE}"

     Important

     To ensure that you use the correct images for the version of OpenShift Container Platform that you selected, you must extract the installation program from the mirrored content.

     You must perform this step on a machine with an active internet connection.

5. For clusters using installer-provisioned infrastructure, run the following command:

   $ openshift-install

Procedure

1. Access the images of a specific image stream to mirror, for example:

   $ oc get is <imagestream> -n openshift -o json | jq .spec.tags[].from.name | grep registry.redhat.io

2. Mirror images from registry.redhat.io associated with any image streams you need

   $ oc image mirror registry.redhat.io/rhscl/ruby-25-rhel7:latest ${MIRROR_ADDR}/rhscl/ruby-25-rhel7:latest

3. Create the cluster’s image configuration object:

   $ oc create configmap registry-config --from-file=${MIRROR_ADDR_HOSTNAME}..5000=$path/ca.crt -n openshift-config

4. Add the required trusted CAs for the mirror in the cluster’s image configuration object:

   $ oc patch image.config.openshift.io/cluster --patch '{"spec":{"additionalTrustedCA":{"name":"registry-config"}}}' --type=merge

5. Update the samplesRegistry field in the Cluster Samples Operator configuration object to contain the hostname portion of the mirror location defined in the mirror configuration:

   $ oc edit configs.samples.operator.openshift.io -n openshift-cluster-samples-operator

   Note

   This is required because the image stream import process does not use the mirror or search mechanism at this time.

6. Add any image streams that are not mirrored into the skippedImagestreams field of the Cluster Samples Operator configuration object. Or if you do not want to support any of the sample image streams, set the Cluster Samples Operator to Removed in the Cluster Samples Operator configuration object.

   Note

   The Cluster Samples Operator issues alerts if image stream imports are failing but the Cluster Samples Operator is either periodically retrying or does not appear to be retrying them.

   Many of the templates in the openshift namespace reference the image streams. So using Removed to purge both the image streams and templates will eliminate the possibility of attempts to use them if they are not functional because of any missing image streams.