X-Git-Url: https://osm.etsi.org/gitweb/?a=blobdiff_plain;f=src%2Femuvim%2Fdcemulator%2Fresourcemodel%2F__init__.py;h=c28e2262b5426f2ee6a029680395e44180b92a15;hb=7da4970fbf9548d755decc1361d5d9d548cc0f3c;hp=6ddd45955ac0a26e8204e91e68b1f8231d2a4cf5;hpb=42f08becf9e88b1765793977d581f08c3ebf641f;p=osm%2Fvim-emu.git

diff --git a/src/emuvim/dcemulator/resourcemodel/__init__.py b/src/emuvim/dcemulator/resourcemodel/__init__.py
index 6ddd459..c28e226 100644
--- a/src/emuvim/dcemulator/resourcemodel/__init__.py
+++ b/src/emuvim/dcemulator/resourcemodel/__init__.py
@@ -8,60 +8,130 @@ LOG.setLevel(logging.DEBUG)
 
 
 class ResourceModelRegistrar(object):
+    """
+    Global registry to keep track of all existing resource models.
+    """
 
-    def __init__(self, dc_emulation_max_cpu):
+    def __init__(self, dc_emulation_max_cpu, dc_emulation_max_mem):
         self.e_cpu = dc_emulation_max_cpu
+        self.e_mem = dc_emulation_max_mem
         # pointer to all resource models assigned to DCs
         self._resource_models = dict()
-        LOG.info("Resource model registrar created with dc_emulation_max_cpu=%r" % dc_emulation_max_cpu)
+        LOG.info("Resource model registrar created with dc_emulation_max_cpu=%r and dc_emulation_max_mem=%r"
+                 % (dc_emulation_max_cpu, dc_emulation_max_mem))
 
     def register(self, dc, rm):
+        """
+        Register a new resource model.
+        :param dc: Data center to which it is assigned.
+        :param rm: The resource model object.
+        :return: None
+        """
         if dc in self._resource_models:
             raise Exception("There is already an resource model assigned to this DC.")
         self._resource_models[dc] = rm
+        rm.registrar = self
+        rm.dcs.append(dc)
         LOG.info("Registrar: Added resource model: %r" % rm)
 
+    @property
+    def resource_models(self):
+        """
+        List of registered resource models
+        :return:
+        """
+        return list(self._resource_models.itervalues())
+
+    @property
+    def num_dcs_with_rms(self):
+        """
+        Total number of data centers that are connected to a resource model
+        :return:
+        """
+        return sum([len(rm.dcs) for rm in list(self._resource_models.itervalues())])
 
-class ResourceFlavor(object):
 
+class ResourceFlavor(object):
+    """
+    Simple class that represents resource flavors (c.f. OpenStack).
+    Can contain arbitrary metrics.
+    """
     def __init__(self, name, metrics):
         self.name = name
-        self.metrics = metrics
+        self._metrics = metrics
         LOG.debug("Create flavor %r with metrics: %r" % (name, metrics))
 
+    def get(self, metric_key):
+        return self._metrics.get(metric_key)
+
 
 class BaseResourceModel(object):
+    """
+    Base class for a resource limitation model.
+    Has to be extended by a real resource model implementtion.
+    """
 
     def __init__(self):
-        self._flavors=dict()
+        self._flavors = dict()
         self._initDefaultFlavors()
+        self.registrar = None  # pointer to registrar
+        self.dcs = list()
+        self.allocated_compute_instances = dict()
         LOG.info("Resource model %r initialized" % self)
 
     def __repr__(self):
         return self.__class__.__name__
 
     def _initDefaultFlavors(self):
-        # initialize some default flavours (inspired by OpenStack)
+        """
+        initialize some default flavours (naming/sizes inspired by OpenStack)
+        """
         self.addFlavour(ResourceFlavor(
-            "tiny",  {"compute": 1, "memory": 32, "disk": 1}))
+            "tiny",  {"compute": 0.5, "memory": 32, "disk": 1}))
         self.addFlavour(ResourceFlavor(
-            "small",  {"compute": 4, "memory": 128, "disk": 20}))
+            "small",  {"compute": 1.0, "memory": 128, "disk": 20}))
         self.addFlavour(ResourceFlavor(
-            "medium",  {"compute": 8, "memory": 256, "disk": 40}))
+            "medium",  {"compute": 4.0, "memory": 256, "disk": 40}))
         self.addFlavour(ResourceFlavor(
-            "large",  {"compute": 16, "memory": 512, "disk": 80}))
+            "large",  {"compute": 8.0, "memory": 512, "disk": 80}))
         self.addFlavour(ResourceFlavor(
-            "xlarge",  {"compute": 32, "memory": 1024, "disk": 160}))
+            "xlarge",  {"compute": 16.0, "memory": 1024, "disk": 160}))
 
     def addFlavour(self, fl):
+        """
+        Add a new flavor to the resource model.
+        :param fl: flavor object
+        :return: None
+        """
         if fl.name in self._flavors:
             raise Exception("Flavor with name %r already exists!" % fl.name)
         self._flavors[fl.name] = fl
 
     def allocate(self, name, flavor_name):
-        LOG.info("RM-ALLOCATE: %r with flavor: %r" % (name, flavor_name))
-        return 0.0, 0.0, 0.0
+        """
+        This method has to be overwritten by a real resource model.
+        :param name: Name of the started compute instance.
+        :param flavor_name:  Name of the flavor to be allocated.
+        :return: 3-tuple: (CPU-fraction, Mem-limit, Disk-limit)
+        """
+        LOG.warning("Allocating in BaseResourceModel: %r with flavor: %r" % (name, flavor_name))
+        self.allocated_compute_instances[name] = flavor_name
+        return -1.0, -1.0, -1.0  # return invalid values to indicate that this RM is a dummy
 
     def free(self, name):
-        LOG.info("RM-FREE: %r" % name)
-
+        """
+        This method has to be overwritten by a real resource model.
+        :param name: Name of the compute instance that is stopped.
+        :return: True/False
+        """
+        LOG.warning("Free in BaseResourceModel: %r" % name)
+        del self.allocated_compute_instances[name]
+        return True
+
+    def get_state_dict(self):
+        """
+        Return the state of the resource model as simple dict.
+        Helper method for logging functionality.
+        :return:
+        """
+        return dict()