fix(docker): switch to aufs storage backend

Author: Gabriel Monroy

contrib/coreos/systemd/docker.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=Docker Application Container Engine
+Documentation=http://docs.docker.io
+
+[Service]
+ExecStartPre=/bin/mount --make-rprivate /
+# Run docker but don't have docker automatically restart
+# containers. This is a job for systemd and unit files.
+ExecStart=/usr/bin/docker -d -s=aufs -r=false -H fd://
+
+[Install]
+WantedBy=multi-user.target

contrib/coreos/user-data

@@ -5,6 +5,20 @@ coreos:
     addr: 172.17.8.100:4001
     peer-addr: 172.17.8.100:7001
   units:
+  - name: docker.service
+    content: |
+      [Unit]
+      Description=Docker Application Container Engine
+      Documentation=http://docs.docker.io
+
+      [Service]
+      ExecStartPre=/bin/mount --make-rprivate /
+      # Run docker but don't have docker automatically restart
+      # containers. This is a job for systemd and unit files.
+      ExecStart=/usr/bin/docker -d -s=aufs -r=false -H fd://
+
+      [Install]
+      WantedBy=multi-user.target
   - name: docker-tcp.socket
     command: start
     content: |