fixes in fetching nodes' info

db/influx/influxdb_fetchnode.py

@@ -8,12 +8,13 @@ from . import metrics
 
 m_node = conf.measurements["node"]
 
-def get_nodeinfo_query(node_id):
+def get_nodeinfo_query(node_id, t_start, t_end):
     random_field = metrics.metrics_node["sockets"]["dbname"]
     query = (
         'SELECT last({:s}), * FROM "{:s}" '
-        'WHERE "host" = \'{:s}\' GROUP BY "host";'
-    ).format(random_field, m_node, node_id)
+        'WHERE time >= {:d}s AND time <= {:d}s AND '
+        '"host" = \'{:s}\' GROUP BY "host";'
+    ).format(random_field, m_node, t_start, t_end, node_id)
     return query
 
 def get_query_max_of_node(node_id, msrmnt, metric, metric_db, t_start, t_end):
@@ -38,7 +39,7 @@ def get_node_queries(nodes, t_start, t_end):
     queries = ""
 
     for n in nodes:
-        q = get_nodeinfo_query(n)
+        q = get_nodeinfo_query(n, t_start, t_end)
         queries += q
 
         for m, par in metrics.metrics_node.items():