Red Hat OpenShift Container Platform

Retrieving a release image digest

In order to update a cluster in a disconnected environment using the oc adm upgrade command with the --to-image option, you must reference the sha256 digest that corresponds to your targeted release image.

Procedure

Run the following command on a device that is connected to the internet:
```
$ oc adm release info -o 'jsonpath={.digest}{"\n"}' quay.io/openshift-release-dev/ocp-release:${OCP_RELEASE_VERSION}-${ARCHITECTURE}
```
For {OCP_RELEASE_VERSION}, specify the version of Red Hat OpenShift Container Platform to which you want to update, such as 4.10.16.

For {ARCHITECTURE}, specify the architecture of the cluster, such as x86_64, aarch64, s390x, or ppc64le.
Example output
```
sha256:a8bfba3b6dddd1a2fbbead7dac65fe4fb8335089e4e7cae327f3bad334add31d
```
Copy the sha256 digest for use when updating your cluster.