Under stein
Setting ContainerImageRegistryCredentials and setting "push_destination: true" in the containers-prepare-parameter.yaml file lets the director download the images and store them on the director. If push_destination is not set, the login credentials are not used on the nodes unless "ContainerImageRegistryLogin: true" is also set. But when that parameter is set, you get the following error instead:
fatal: [overcloud-controller-0]: FAILED! => {"msg": "The conditional check 'container_registry_logins_json | length) > 0' failed. The error was: template error while templating string: unexpected ')'. String: {% if container_registry_logins_json | length) > 0 %} True {% else %} False {% endif %}\n\nThe error appears to be in '/var/lib/mistral/overcloud/Controller/host_prep_tasks.yaml': line 737, column 5, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n <email address hidden>: password\n - name: Convert logins json to dict\n ^ here\n"}
Fixed in train https:/