Red Hat build of MicroShift

Get the mirror registry container image list

To use a mirror registry, you must know which container image references are used by a specific version of MicroShift. These references are provided in the release-<arch>.json files that are part of the microshift-release-info RPM package.

To mirror the Operator Lifecycle Manager (OLM) in disconnected environments, add the references provided in the release-olm-$ARCH.json that is included in the microshift-olm RPM and follow the same procedure. Use the oc-mirror CLI plugin for mirroring Operator catalogs and Operators.

Prerequisites

You have installed jq.

Procedure

Access the list of container image references by using one of the following methods:
- If the package is installed on the MicroShift host, get the location of the files by running the following command:
  $ rpm -ql microshift-release-info
  Example output
  /usr/share/microshift/release/release-x86_64.json
- If the package is not installed on a MicroShift host, download and unpack the RPM package without installing it by running the following command:
  $ rpm2cpio microshift-release-info*.noarch.rpm | cpio -idmv
  Example output
  /usr/share/microshift/release/release-x86_64.json

Extract the list of container images into the microshift-container-refs.txt file by running the following commands:

$ RELEASE_FILE=/usr/share/microshift/release/release-$(uname -m).json

$ jq -r '.images | .[]' ${RELEASE_FILE} > microshift-container-refs.txt

After the microshift-container-refs.txt file is created with the MicroShift container image list, you can append the file with other user-specific image references before running the mirroring procedure.