Provide cloud-init status information

See grml/grml#124 +
#1

quickconfig/003-cloud-init.sh

@@ -0,0 +1,34 @@
+# cloud-init not installed/present
+if ! [ -x $(which cloud-init) ] ; then
+  return 0
+fi
+
+# cloud-init service not running
+if ! cloud-init status 2>/dev/null | grep -q 'status: running' ; then
+  return 0
+fi
+
+LINE+="print_line 'Cloud-init information:';"
+
+if cloud-init query -l 2>/dev/null | grep -q userdata ; then
+  userdata=$(mktemp)
+  cloud-init query userdata > "${userdata}" 2>/dev/null
+
+  hostname=$(awk '/^hostname/ {print $2}' "${userdata}")
+  if [ -n "${hostname}" ] ; then
+    LINE+="print_line '-> Hostname:    ${hostname}';"
+    unset hostname
+  fi
+
+  rm -f "${userdata}"
+  unset userdata
+fi
+
+instance_id=$(cloud-init query instance_id 2>/dev/null)
+if [ -n "${instance_id}" ] ; then
+  LINE+="print_line '-> Instance ID: ${instance_id}';"
+fi
+
+LINE+='print_delim;'
+
+display_entry() { return 0; }