Random Service port in a specific range.

Now the conductor get a random port for the service in a range of unused ports

Change-Id: Ifa51cc8d7a0459d46a72ea1c285b717932bbc94c

etc/iotronic/iotronic.conf

@@ -15,6 +15,10 @@ auth_strategy=keystone
 # value)
 #pecan_debug=false
 
+[conductor]
+service_port_min=50000
+service_port_max=60000
+
 
 [wamp]
 wamp_transport_url = ws://<host>:<port>/

iotronic/common/exception.py

@@ -616,6 +616,10 @@ class ServiceAlreadyExposed(Conflict):
     message = _("A Service with UUID %(uuid)s already exposed.")
 
 
+class NotEnoughPortForService(NotFound):
+    message = _("No ports available")
+
+
 class ExposedServiceNotFound(NotFound):
     message = _("ExposedService %(uuid)s could not be found.")
 

iotronic/conductor/endpoints.py

@@ -43,6 +43,8 @@ serializer = objects_base.IotronicObjectSerializer()
 
 Port = list()
 
+SERVICE_PORT_LIST = None
+
 
 def versionCompare(v1, v2):
     """Method to compare two versions.
@@ -104,8 +106,24 @@ def get_best_agent(ctx):
     return agent.hostname
 
 
-def random_public_port():
-    return random.randint(50001, 59999)
+def random_public_port(ctx=None):
+    global SERVICE_PORT_LIST
+    if not SERVICE_PORT_LIST:
+        # empty, create a cache list
+        min = cfg.CONF.conductor.service_port_min + 1
+        max = cfg.CONF.conductor.service_port_max - 1
+        LOG.debug('recreate service port list cache: min %i max %i', min, max)
+        full_list = (range(min, max))
+        exp_list = objects.ExposedService.get_all_ports(ctx)
+        SERVICE_PORT_LIST = list(set(full_list) - set(exp_list))
+
+    if len(SERVICE_PORT_LIST) == 0:
+        LOG.warning('No more ports available')
+        return None
+    else:
+        num = random.choice(SERVICE_PORT_LIST)
+        SERVICE_PORT_LIST.remove(num)
+    return num
 
 
 def manage_result(res, wamp_rpc_call, board_uuid):
@@ -477,6 +495,9 @@ class ConductorEndpoint(object):
             except Exception:
                 public_port = random_public_port()
 
+                if not public_port:
+                    return exception.NotEnoughPortForService()
+
                 res = self.execute_on_board(ctx, board_uuid, action,
                                             (service, public_port))
                 result = manage_result(res, action, board_uuid)
@@ -504,6 +525,11 @@ class ConductorEndpoint(object):
 
             result = manage_result(res, action, board_uuid)
             LOG.debug(res.message)
+            global SERVICE_PORT_LIST
+            try:
+                SERVICE_PORT_LIST.append(exposed.public_port)
+            except exception:
+                pass
             exposed.destroy()
             return result
 
@@ -799,9 +825,10 @@ class ConductorEndpoint(object):
 
         except Exception:
 
-            # TO BE CHANGED
             https_port = random_public_port()
             http_port = random_public_port()
+            if not https_port or not http_port:
+                return exception.NotEnoughPortForService()
 
             en_webservice = {
                 'board_uuid': board.uuid,
@@ -918,6 +945,11 @@ class ConductorEndpoint(object):
         res = self.execute_on_board(ctx, board.uuid, "ServiceDisable",
                                     (service,), main_req=mreq.uuid)
         LOG.debug(res.message)
+        global SERVICE_PORT_LIST
+        try:
+            SERVICE_PORT_LIST.append(exposed.public_port)
+        except exception:
+            pass
         exposed.destroy()
 
         try:

iotronic/conductor/manager.py

@@ -40,6 +40,12 @@ conductor_opts = [
                help='Maximum time (in seconds) since the last check-in '
                     'of a conductor. A conductor is considered inactive '
                     'when this time has been exceeded.'),
+    cfg.IntOpt('service_port_min',
+               default=50000,
+               help='Min value for genereting random ports for services'),
+    cfg.IntOpt('service_port_max',
+               default=60000,
+               help='Max value for genereting random ports for services'),
 ]
 
 CONF = cfg.CONF

iotronic/db/sqlalchemy/api.py

@@ -911,9 +911,13 @@ class Connection(api.Connection):
                 raise exception.ExposedServiceNotFound()
 
     def get_exposed_service_list(self, board_uuid):
+        if board_uuid:
             query = model_query(
                 models.ExposedService).filter_by(
                 board_uuid=board_uuid)
+        else:
+            query = model_query(
+                models.ExposedService)
         return query.all()
 
     def _do_update_exposed_service(self, service_id, values):

iotronic/objects/exposedservice.py

@@ -31,6 +31,14 @@ class ExposedService(base.IotronicObject):
         'public_port': int
     }
 
+    @base.remotable_classmethod
+    def get_all_ports(cls, context):
+        ls = cls.list(context)
+        ports = []
+        for x in ls:
+            ports.append(x.public_port)
+        return ports
+
     @staticmethod
     def _from_db_object(exposed_service, db_exposed_service):
         """Converts a database entity to a formal object."""
@@ -96,7 +104,7 @@ class ExposedService(base.IotronicObject):
         return exp_service
 
     @base.remotable_classmethod
-    def list(cls, context, board_uuid):
+    def list(cls, context, board_uuid=None):
         """Return a list of ExposedService objects.
 
         :param context: Security context.

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.3.1
-envlist = py3,pep8
+envlist = py35,pep8
 skipsdist = True
 
 [testenv]
@@ -22,8 +22,8 @@ commands =
 basepython = python2.7
 commands = flake8 {posargs}
 
-[testenv:py3]
-basepython = python3
+[testenv:py35]
+basepython = python3.5
 
 
 [flake8]