okd/roles/openshift_registry/tasks/main.yml

---
- name: Deploy OpenShift Registry
  command: >
    {{ openshift.common.admin_binary }} registry
    --create --replicas={{ openshift.master.infra_nodes | length }}
    --service-account=registry {{ oreg_selector }}
    --credentials={{ openshift_master_config_dir }}/openshift-registry.kubeconfig {{ oreg_images }}
  register: oreg_results
  changed_when: "'service exists' not in oreg_results.stdout"

- name: Determine if volume is already attached to dc/docker-registry
  command: "{{ openshift.common.client_binary }} get -o template dc/docker-registry --template=\\{\\{.spec.template.spec.volumes\\}\\}"
  changed_when: false
  register: registry_volumes_output

- set_fact:
    volume_attached: "{{ registry_volume_claim in registry_volumes_output.stdout }}"

- name: Add volume to dc/docker-registry
  command: >
    {{ openshift.common.client_binary }} volume dc/docker-registry
    --add --overwrite -t persistentVolumeClaim --claim-name={{ registry_volume_claim }}
    --name=registry-storage
  when: not volume_attached | bool