Adds yum-version lock to prevent docker from upgrading if a version i…

…s specified (#132)

Prevents automated yum updates from upgrading docker if pinned to a
specific version

roles/docker/tasks/main.yml

@@ -43,6 +43,18 @@
     - docker-buildx-plugin
     - docker-compose-plugin
 
+- name: Ensure yum-plugin-versionlock is installed
+  ansible.builtin.yum:
+    name: yum-plugin-versionlock
+    state: installed
+
+- name: Prevent docker from being updated
+  community.general.yum_versionlock:
+    state: "{{ 'absent' if docker_version == 'latest' else 'present' }}"
+    name:
+      - docker-ce
+      - docker-ce-cli
+
 - name: Ensure docker service directory exists
   ansible.builtin.file:
     path: "{{ docker_service_directory }}"