Limit cpu resource consumption of function

Partially implements: blueprint qinling-container-resource-limitation

Change-Id: I2bb850e2d9bcf33e69d562abdbf88a226e1f4b92

qinling/engine/default_engine.py

@@ -111,8 +111,7 @@ class DefaultEngine(object):
                 success = success and res.pop('success')
 
                 LOG.debug(
-                    'Finished execution %s, success: %s, result: %s',
-                    execution_id, success, res
+                    'Finished execution %s, success: %s', execution_id, success
                 )
 
                 execution.status = status.SUCCESS if success else status.FAILED
@@ -165,8 +164,7 @@ class DefaultEngine(object):
                 res = {'output': res}
 
             LOG.debug(
-                'Finished execution %s, success: %s, result: %s',
-                execution_id, success, res
+                'Finished execution %s, success: %s', execution_id, success
             )
 
             execution.output = res
@@ -187,6 +185,7 @@ class DefaultEngine(object):
                 db_api.create_function_worker(worker)
 
     def delete_function(self, ctx, function_id):
+        """Deletes underlying resources allocated for function."""
         resource = {'type': 'function', 'id': function_id}
         LOG.info('Start to delete.', resource=resource)
 

qinling/orchestrator/kubernetes/templates/deployment.j2

@@ -28,6 +28,8 @@ spec:
         - containerPort: 9090
         resources:
           limits:
+            cpu: "0.5"
             memory: 512Mi
           requests:
+            cpu: "0.1"
             memory: 128Mi

qinling/orchestrator/kubernetes/templates/pod.j2

@@ -20,6 +20,8 @@ spec:
   restartPolicy: Never
   resources:
     limits:
+      cpu: "0.5"
       memory: 512Mi
     requests:
+      cpu: "0.1"
       memory: 128Mi