apiVersion: config.openshift.io/v1
kind: ImageDigestMirrorSet
metadata:
  name: idms-coo
spec:
  imageDigestMirrors:
  - mirrors:
    - brew.registry.redhat.io/cluster-observability-operator
    source: registry.redhat.io/cluster-observability-operator

% oc get pod
NAME                             READY  STATUS       RESTARTS  AGE
obo-prometheus-operator-6666c894f8-nxq58           0/1   ImagePullBackOff  0     28m
obo-prometheus-operator-admission-webhook-574bcdb4b7-d7dxj  0/1   ImagePullBackOff  0     28m
obo-prometheus-operator-admission-webhook-574bcdb4b7-snzcv  0/1   ImagePullBackOff  0     28m
observability-operator-d4dcbc57f-n2p4w            0/1   ImagePullBackOff  0     28m
$ oc describe pod obo-prometheus-operator-6666c894f8-nxq58
......
Events:
  Type     Reason          Age                   From               Message
  ----     ------          ----                  ----               -------
  Normal   Scheduled       14m                   default-scheduler  Successfully assigned openshift-cluster-observability-operator/obo-prometheus-operator-6666c894f8-nxq58 to ip-10-0-70-8.us-east-2.compute.internal
  Normal   AddedInterface  14m                   multus             Add eth0 [10.128.2.79/23] from ovn-kubernetes
  Normal   Pulling         13m (x4 over 14m)     kubelet            Pulling image "registry.redhat.io/cluster-observability-operator/obo-prometheus-operator@sha256:4e13fce3cff4d73518e6f2d39b128c92783719eaa99f0318f429a01a4747d105"
  Warning  Failed          13m (x4 over 14m)     kubelet            Failed to pull image "registry.redhat.io/cluster-observability-operator/obo-prometheus-operator@sha256:4e13fce3cff4d73518e6f2d39b128c92783719eaa99f0318f429a01a4747d105": initializing source docker://registry.redhat.io/cluster-observability-operator/obo-prometheus-operator@sha256:4e13fce3cff4d73518e6f2d39b128c92783719eaa99f0318f429a01a4747d105: (Mirrors also failed: [brew.registry.redhat.io/cluster-observability-operator/obo-prometheus-operator@sha256:4e13fce3cff4d73518e6f2d39b128c92783719eaa99f0318f429a01a4747d105: reading manifest sha256:4e13fce3cff4d73518e6f2d39b128c92783719eaa99f0318f429a01a4747d105 in brew.registry.redhat.io/cluster-observability-operator/obo-prometheus-operator: name unknown: Digest not found]): registry.redhat.io/cluster-observability-operator/obo-prometheus-operator@sha256:4e13fce3cff4d73518e6f2d39b128c92783719eaa99f0318f429a01a4747d105: reading manifest sha256:4e13fce3cff4d73518e6f2d39b128c92783719eaa99f0318f429a01a4747d105 in registry.redhat.io/cluster-observability-operator/obo-prometheus-operator: unauthorized: access to the requested resource is not authorized
  Warning  Failed          13m (x4 over 14m)     kubelet            Error: ErrImagePull
  Warning  Failed          13m (x6 over 14m)     kubelet            Error: ImagePullBackOff
  Normal   BackOff         4m51s (x42 over 14m)  kubelet            Back-off pulling image "registry.redhat.io/cluster-observability-operator/obo-prometheus-operator@sha256:4e13fce3cff4d73518e6f2d39b128c92783719eaa99f0318f429a01a4747d105"