Initial commit of Docker role

Change-Id: I7326a4e1c784b0e27294d9ce11beb4be25386192
diff --git a/vars/Debian.yml b/vars/Debian.yml
new file mode 100644
index 0000000..5cb4aaa
--- /dev/null
+++ b/vars/Debian.yml
@@ -0,0 +1,16 @@
+---
+# docker vars/Debian.yml
+#
+# SPDX-FileCopyrightText: © 2020 Open Networking Foundation <support@opennetworking.org>
+# SPDX-License-Identifier: Apache-2.0
+#
+# NOTE: Only put platform/OS-specific variables in this file.
+# Put all other variables in the 'defaults/main.yml' file.
+
+docker_package: "docker-ce"
+
+docker_service: "docker"
+
+# docker packages start with 5 for epoch currently
+# see https://manpages.debian.org/buster/dpkg-dev/deb-version.7.en.html
+docker_apt_epoch: "5"