[feature] change libnrm ratelimit in manifest

Add a "monitoring" section to the manifest, that allows users to modify
libnrm through environment variables.

doc/manifest

@@ -34,6 +34,13 @@
 					"slowdown": "1.1"
 				}
 			},
+			{
+				"name": "argo/monitoring",
+				"value": {
+					 "enabled": "1",
+					 "ratelimit": "10000000"
+				}
+			},
 			{
 				"name": "argo/hwbind",
 				"value": {

nrm/aci.py

@@ -240,6 +240,34 @@ class HwBind(SpecField):
         return True
 
 
+class Monitoring(SpecField):
+
+    """Monitoring options (libnrm)."""
+
+    fields = {"enabled": spec(unicode, False),
+              "monitoring": spec(unicode, False),
+              }
+
+    def __init__(self):
+        """Create empty monitoring option object."""
+        pass
+
+    def load(self, data):
+        """Load monitoring options."""
+        ret = super(Monitoring, self).load(data)
+        if not ret:
+            return ret
+        if self.enabled not in ["0", "False", "1", "True"]:
+            logger.error("Invalid value for monitoring options enabled: %s",
+                         self.enabled)
+            return False
+        if self.ratelimit < 0:
+            logger.error("Invalid value for monitoring ratelimit: %s",
+                         self.ratelimit)
+            return False
+        return True
+
+
 class IsolatorList(SpecField):
 
     """Represent the list of isolator in a Manifest."""
@@ -249,6 +277,7 @@ class IsolatorList(SpecField):
              "argo/perfwrapper": spec(PerfWrapper, False),
              "argo/power": spec(Power, False),
              "argo/hwbind": spec(HwBind, False),
+             "argo/monitoring": spec(Monitoring, False),
              }
 
     def __init__(self):

nrm/containers.py

@@ -128,6 +128,11 @@ class ContainerManager(object):
             environ['NRM_TRANSMIT'] = '1'
             environ['NRM_DAMPER'] = container.power['damper']
 
+        # monitoring section involves libnrm
+        if manifest.is_feature_enabled('monitoring'):
+            environ['ARGO_NRM_RATELIMIT'] = \
+                    manifest.app.isolators.monitoring.ratelimit
+
         # build prefix to the entire command based on enabled features
         argv = []
         if manifest.is_feature_enabled('scheduler'):