install docker on a largest number of linux distribution (based on https://github.com/marklee77/ansible-role-docker)

roles/docker/vars/fedora-20.yml

@@ -0,0 +1,22 @@
+docker_kernel_min_version: '0'
+
+docker_package_info:
+  pkg_mgr: yum
+  args:
+      name: "{{ item }}"
+      state: latest
+      update_cache: yes
+  pre_pkgs: 
+    - curl
+  pkgs:
+    - docker-io
+
+docker_repo_key_info:
+  pkg_key: ''
+  args: {}
+  repo_keys: []
+
+docker_repo_info:
+  pkg_repo: ''
+  args: {}
+  repos: []