Add MonD's latest API Version in lib/constants.py

Extract the version number from MonD's own file into the constants file, so that
is can be accessed from other parts of the system as well (e.g.: to perform
queries over the MonD protocol).
Signed-off-by: Spyros Trigazis <strigazi@gmail.com>
Signed-off-by: Michele Tartara <mtartara@google.com>
Reviewed-by: Michele Tartara <mtartara@google.com>

lib/constants.py

@@ -2257,6 +2257,9 @@ CPUAVGLOAD_WINDOW_SIZE = 600
 # Mond's variable for periodical data collection
 MOND_TIME_INTERVAL = _constants.MOND_TIME_INTERVAL
 
+# MonD's latest API version
+MOND_LATEST_API_VERSION = 1
+
 # Do not re-export imported modules
 del re, _vcsversion, _constants, socket, pathutils, compat
 

src/Ganeti/Monitoring/Server.hs

@@ -63,7 +63,7 @@ type PrepResult = Config Snap ()
 
 -- | Version of the latest supported http API.
 latestAPIVersion :: Int
-latestAPIVersion = 1
+latestAPIVersion = C.mondLatestApiVersion
 
 -- | A report of a data collector might be stateful or stateless.
 data Report = StatelessR (IO DCReport)