okd/roles/openshift_logging_mux/vars/default_images.yml

---
# unable to escape characters in here for some reason -- ideally would be '^[v]?\d\.\d+'
__openshift_logging_image_tag: "{{ openshift_image_tag | regex_search('^[v]?[0-9].[0-9]+') }}"

__openshift_logging_mux_image_prefix: "{{ openshift_logging_image_prefix | default('docker.io/openshift/origin-') }}"
__openshift_logging_mux_image_version: "{{ openshift_logging_image_version | default(__openshift_logging_image_tag) }}"