Ability to define GPG key path for Docker APT (#10513)

roles/container-engine/docker/defaults/main.yml

@@ -5,6 +5,9 @@ docker_cli_version: "{{ docker_version }}"
 docker_package_info:
   pkgs:
 
+# Path where to store repo key
+# docker_repo_key_keyring: /etc/apt/trusted.gpg.d/docker.gpg
+
 docker_repo_key_info:
   repo_keys:
 

roles/container-engine/docker/tasks/main.yml

@@ -57,6 +57,7 @@
   apt_key:
     id: "{{ item }}"
     url: "{{ docker_repo_key_info.url }}"
+    keyring: "{{ docker_repo_key_keyring|default(omit) }}"
     state: present
   register: keyserver_task_result
   until: keyserver_task_result is succeeded