[docker] Ability to define GPG key path for Docker APT

docs/docker.md

@@ -97,3 +97,9 @@ Adding extra options to pass to the docker daemon:
 ## This string should be exactly as you wish it to appear.
 docker_options: ""
 ```
+
+For Debian based distributions, set the path to store the GPG key to avoid using the default one used in `apt_key` module (e.g. /etc/apt/trusted.gpg)
+
+```yaml
+docker_repo_key_keyring: /etc/apt/trusted.gpg.d/docker.gpg
+```

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

tests/files/packet_debian12-docker.yml

@@ -7,3 +7,4 @@ mode: default
 container_manager: docker
 etcd_deployment_type: docker
 resolvconf_mode: docker_dns
+docker_repo_key_keyring: /etc/apt/trusted.gpg.d/docker.gpg

tests/files/packet_ubuntu22-aio-docker.yml

@@ -15,3 +15,4 @@ enable_nodelocaldns: False
 container_manager: docker
 etcd_deployment_type: docker
 resolvconf_mode: docker_dns
+docker_repo_key_keyring: /etc/apt/trusted.gpg.d/docker.gpg