Generate a unique machine-id

The systemd machine-id needs to be unique on all network attached
devices. This change ensures that when a container comes online, a
unique machine-id is generated if one was not already present. When
the machine-id is created for the first time the container will restart
so the new ID can take effect.

More information on the machine-id can be found here:
https://www.freedesktop.org/software/systemd/man/machine-id.html

Change-Id: Ib25aeeecf1e6001e6c6b1a7d6b6d50eca7ab45fa
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>
(cherry picked from commit 01fc5fa643)

tasks/lxc_container_create.yml

@@ -62,3 +62,23 @@
   delay: 5
   when:
     - _lxc_container_state.stdout.find('STOPPED') != -1
+
+- name: Generate machine-id
+  command: "systemd-machine-id-setup"
+  args:
+    creates: "/etc/machine-id"
+  notify:
+    - Lxc container restart
+
+- name: Ensure the dbus directory exists
+  file:
+    path: "/var/lib/dbus"
+    state: "directory"
+
+- name: Create dbus machine-id
+  copy:
+    src: "/etc/machine-id"
+    dest: "/var/lib/dbus/machine-id"
+    mode: "0444"
+    remote_src: "yes"
+  remote_user: root