Added round robin based placement algorithm to dummy GK to use both PoPs for the...

[osm/vim-emu.git] / src / emuvim / api / sonata / dummygatekeeper.py

diff --git a/src/emuvim/api/sonata/dummygatekeeper.py b/src/emuvim/api/sonata/dummygatekeeper.py
index 7ae3522..69e5f3c 100755 (executable)
--- a/src/emuvim/api/sonata/dummygatekeeper.py
+++ b/src/emuvim/api/sonata/dummygatekeeper.py
@@ -64,6 +64,7 @@ GK_STANDALONE_MODE = False
 FORCE_PULL = False
 
 # Automatically deploy SAPs (endpoints) of the service as new containers
+# Attention: This is not a configuration switch but a global variable! Don't change its default value.
 DEPLOY_SAP = False
 
 class Gatekeeper(object):
@@ -163,7 +164,8 @@ class Service(object):
 
         # 3. compute placement of this service instance (adds DC names to VNFDs)
         if not GK_STANDALONE_MODE:
-            self._calculate_placement(FirstDcPlacement)
+            #self._calculate_placement(FirstDcPlacement)
+            self._calculate_placement(RoundRobinDcPlacement)
         # iterate over all vnfds that we have to start
         for vnfd in self.vnfds.itervalues():
             vnfi = None
@@ -238,8 +240,8 @@ class Service(object):
 
                 if vnf_name in self.vnfds:
                     # re-configure the VNFs IP assignment and ensure that a new subnet is used for each E-LAN
-                    # E-LAN relies on the learning switch capability of the infrastructure switch in dockernet,
-                    # so no explicit chaining is necessary
+                    # E-LAN relies on the learning switch capability of Ryu which has to be turned on in the topology
+                    # (DCNetwork(controller=RemoteController, enable_learning=True)), so no explicit chaining is necessary.
                     vnfi = self._get_vnf_instance(instance_uuid, vnf_name)
                     if vnfi is not None:
                         self._vnf_reconfigure_network(vnfi, intf_name, ip_address)
@@ -501,6 +503,21 @@ class FirstDcPlacement(object):
             vnfd["dc"] = list(dcs.itervalues())[0]
 
 
+class RoundRobinDcPlacement(object):
+    """
+    Placement: Distribute VNFs across all available DCs in a round robin fashion.
+    """
+
+    def place(self, nsd, vnfds, dcs):
+        c = 0
+        dcs_list = list(dcs.itervalues()) 
+        for name, vnfd in vnfds.iteritems():
+            vnfd["dc"] = dcs_list[c % len(dcs_list)]
+            c += 1  # inc. c to use next DC
+
+
+
+
 """
 Resource definitions and API endpoints
 """