roles/docker: Install and set up Docker daemon

The *docker* role configures the Docker daemon on the managed machine.

roles/docker/handlers/main.yml

@@ -0,0 +1,11 @@
+- name: reload systemd
+  command: systemctl daemon-reload
+- name: reset docker storage
+  script:
+     reset-docker-storage.sh {{ docker_service }}
+- name: restart docker
+  service:
+    name={{ docker_service }}
+    state=restarted
+- name: save firewalld configuration
+  command: firewall-cmd --runtime-to-permanent