okd/roles/openshift_control_plane/tasks/registry_auth.yml

---
- name: Check for credentials file for registry auth
  stat:
    path: "{{ oreg_auth_credentials_path }}"
  when: oreg_auth_user is defined
  register: master_oreg_auth_credentials_stat

- name: Create credentials for registry auth
  command: "docker --config={{ oreg_auth_credentials_path }} login -u {{ oreg_auth_user }} -p {{ oreg_auth_password }} {{ oreg_host }}"
  when:
  - not (openshift_docker_alternative_creds | default(False))
  - oreg_auth_user is defined
  - (not master_oreg_auth_credentials_stat.stat.exists or oreg_auth_credentials_replace) | bool
  register: master_oreg_auth_credentials_create
  retries: 3
  delay: 5
  until: master_oreg_auth_credentials_create.rc == 0
  notify: restart master

# docker_creds is a custom module from lib_utils
# 'docker login' requires a docker.service running on the local host, this is an
# alternative implementation for non-docker hosts.  This implementation does not
# check the registry to determine whether or not the credentials will work.
- name: Create credentials for registry auth (alternative)
  docker_creds:
    path: "{{ oreg_auth_credentials_path }}"
    registry: "{{ oreg_host }}"
    username: "{{ oreg_auth_user }}"
    password: "{{ oreg_auth_password }}"
  when:
  - openshift_docker_alternative_creds | default(False) | bool
  - oreg_auth_user is defined
  - (not master_oreg_auth_credentials_stat.stat.exists or oreg_auth_credentials_replace) | bool
  register: master_oreg_auth_credentials_create_alt
  notify: restart master