Feature #2435 #2092: New host and ds sched policy: fixed

This new policy simply uses the PRIORITY template attribute
that the admin can set manually.

src/scheduler/etc/sched.conf

@@ -30,10 +30,12 @@
 #      1 = Striping. Heuristic that tries to maximize resources available for
 #          the VMs by spreading the VMs in the hosts
 #      2 = Load-aware. Heuristic that tries to maximize resources available for
-#          the VMs by usingthose nodes with less load
+#          the VMs by using those nodes with less load
 #      3 = Custom.
 #    - rank: Custom arithmetic exprission to rank suitable hosts based in their
 #            attributes
+#      4 = Fixed. Hosts will be ranked according to the PRIORITY attribute found
+#          in the Host or Cluster template.
 #
 #  DEFAULT_DS_SCHED: Definition of the default storage scheduling algorithm
 #    - policy:
@@ -44,6 +46,8 @@
 #      2 = Custom.
 #    - rank: Custom arithmetic exprission to rank suitable datastores based on
 #          their attributes
+#      3 = Fixed. Datastores will be ranked according to the PRIORITY attribute
+#          found in the Datastore template.
 #
 #
 #  LOG: Configuration for the logging system

src/scheduler/src/sched/SchedulerTemplate.cc

@@ -155,6 +155,10 @@ string SchedulerTemplate::get_policy() const
             rank = sched->vector_value("RANK");
         break;
 
+        case 4: //Fixed
+            rank = "PRIORITY";
+        break;
+
         default:
             rank = "";
     }
@@ -201,6 +205,10 @@ string SchedulerTemplate::get_ds_policy() const
             rank = sched->vector_value("RANK");
         break;
 
+        case 3: //Fixed
+            rank = "PRIORITY";
+        break;
+
         default:
             rank = "";
     }

src/vmm_mad/remotes/ec2/ec2_driver.rb

@@ -307,6 +307,7 @@ class EC2Driver
 
         host_info =  "HYPERVISOR=ec2\n"
         host_info << "PUBLIC_CLOUD=YES\n"
+        host_info << "PRIORITY=-1\n"
         host_info << "TOTALMEMORY=#{totalmemory.round}\n"
         host_info << "TOTALCPU=#{totalcpu}\n"
         host_info << "CPUSPEED=1000\n"