added option to set docker gpg key

README.md

@@ -37,12 +37,14 @@ Docker Compose installation options.
     docker_apt_arch: amd64
     docker_apt_repository: "deb [arch={{ docker_apt_arch }}] https://download.docker.com/linux/{{ ansible_distribution|lower }} {{ ansible_distribution_release }} {{ docker_apt_release_channel }}"
     docker_apt_ignore_key_error: True
+    docker_apt_gpg_key: https://download.docker.com/linux/ubuntu/gpg
 
 (Used only for Debian/Ubuntu.) You can switch the channel to `edge` if you want to use the Edge release.
 
     docker_yum_repo_url: https://download.docker.com/linux/centos/docker-{{ docker_edition }}.repo
     docker_yum_repo_enable_edge: 0
     docker_yum_repo_enable_test: 0
+    docker_yum_gpg_key: https://download.docker.com/linux/centos/gpg
 
 (Used only for RedHat/CentOS.) You can enable the Edge or Test repo by setting the respective vars to `1`.
 

defaults/main.yml

@@ -19,11 +19,13 @@ docker_apt_release_channel: stable
 docker_apt_arch: amd64
 docker_apt_repository: "deb [arch={{ docker_apt_arch }}] https://download.docker.com/linux/{{ ansible_distribution|lower }} {{ ansible_distribution_release }} {{ docker_apt_release_channel }}"
 docker_apt_ignore_key_error: true
+docker_apt_gpg_key: https://download.docker.com/linux/ubuntu/gpg
 
 # Used only for RedHat/CentOS/Fedora.
 docker_yum_repo_url: https://download.docker.com/linux/{{ (ansible_distribution == "Fedora") | ternary("fedora","centos") }}/docker-{{ docker_edition }}.repo
 docker_yum_repo_enable_edge: 0
 docker_yum_repo_enable_test: 0
+docker_yum_gpg_key: https://download.docker.com/linux/centos/gpg
 
 # A list of users who will be added to the docker group.
 docker_users: []

tasks/setup-Debian.yml

@@ -15,7 +15,7 @@
 
 - name: Add Docker apt key.
   apt_key:
-    url: https://download.docker.com/linux/ubuntu/gpg
+    url: "{{ docker_apt_gpg_key }}"
     id: 9DC858229FC7DD38854AE2D88D81803C0EBFCD88
     state: present
   register: add_repository_key
@@ -26,7 +26,7 @@
   when: add_repository_key is failed
 
 - name: Add Docker apt key (alternative for older systems without SNI).
-  shell: "curl -sSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -"
+  shell: "curl -sSL {{ docker_apt_gpg_key }} | sudo apt-key add -"
   args:
     warn: false
   when: add_repository_key is failed

tasks/setup-RedHat.yml

@@ -9,7 +9,7 @@
 
 - name: Add Docker GPG key.
   rpm_key:
-    key: https://download.docker.com/linux/centos/gpg
+    key: "{{ docker_yum_gpg_key }}"
     state: present
 
 - name: Add Docker repository.