Added hkvmver and hkvmsetup tags

cloudcontrol/node/host/tags.py

@@ -19,6 +19,8 @@ Just define a string or a function and it will be introspected and used as a
 tag value.
 """
 import re
+import time
+import datetime
 import os as os_
 import platform as platform_
 from multiprocessing import cpu_count
@@ -207,3 +209,17 @@ def load():
 
 def plugins(handler):
     return ' '.join(handler.plugins) or None
+
+
+# HKVM related tags
+def hkvmver():
+    """HKVM version."""
+    fields = dict(x.split(': ', 1) for x in open('/etc/isimage').read().split('\n') if x.strip())
+    return int(fields['image version'])
+
+
+def hkvmsetup():
+    """HKVM setup date."""
+    fields = dict(x.split(': ', 1) for x in open('/etc/isimage').read().split('\n') if x.strip())
+    setup_date = datetime.datetime.strptime(fields['setup date'], '%a, %d %b %Y %H:%M:%S +0000')
+    return int(time.mktime(setup_date.timetuple()))