kubespray/tests/common/_docker_hub_registry_mirror.yml

---
docker_registry_mirrors:
  - "https://mirror.gcr.io"

containerd_config:
  grpc:
    max_recv_message_size: 16777216
    max_send_message_size: 16777216
  debug:
    level: ""
  registries:
    "docker.io":
      - "https://mirror.gcr.io"
      - "https://registry-1.docker.io"
  max_container_log_line_size: -1

crio_registries_mirrors:
  - prefix: docker.io
    insecure: false
    blocked: false
    location: registry-1.docker.io
    mirrors:
      - location: mirror.gcr.io
        insecure: false