From 61e6f63b32dfa127c11572440f3dd5e5a67f2580 Mon Sep 17 00:00:00 2001
From: Craig Miskell <craig.miskell@fluxfederation.com>
Date: Fri, 5 Jan 2018 09:08:40 +1300
Subject: [PATCH] Align queries to prometheus with the step to ensure 'rate'
 type expressions get consistent results

---
 public/app/plugins/datasource/prometheus/datasource.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/public/app/plugins/datasource/prometheus/datasource.ts b/public/app/plugins/datasource/prometheus/datasource.ts
index 122fe9601a1..0782170fbd9 100644
--- a/public/app/plugins/datasource/prometheus/datasource.ts
+++ b/public/app/plugins/datasource/prometheus/datasource.ts
@@ -173,6 +173,9 @@ export class PrometheusDatasource {
       throw { message: 'Invalid time range' };
     }
 
+    start = start - (start % query.step);
+    end = end - (end % query.step) + query.step;
+
     var url =
       '/api/v1/query_range?query=' +
       encodeURIComponent(query.expr) +