$__range uses dashboard range, not overwritten panel range

[patrick246]

What happened: Dashboard is set to Last 6 hours, panel is set to This month so far (now/M). The $__range variable is used in a Prometheus query. Start and end parameters are correct, however, $__range evaluates to 6h.

What you expected to happen: $__range should evaluate to the overridden range

How to reproduce it (as minimally and precisely as possible): Setup a new dashboard, add a new panel, override relative time and use $__range in the query. Then use the query inspector to view the replacement for $__range

Anything else we need to know?: Grafana is running in Docker

Environment:

• Grafana version: Grafana v6.1.6 (commit: cf9cb45)
• Data source type & version: Prometheus, Version 2.9.1
• OS Grafana is installed on: Linux *** 4.15.0-47-generic constantLine() function doesn't work #50-Ubuntu SMP Wed Mar 13 10:44:52 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux as Docker host, Linux bef47d8138a2 4.15.0-47-generic constantLine() function doesn't work #50-Ubuntu SMP Wed Mar 13 10:44:52 UTC 2019 x86_64 GNU/Linux in Docker container
• User OS & Browser: OS: Linux *** 4.15.0-48-generic PR for issue 24 #51-Ubuntu SMP Wed Apr 3 08:28:49 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux, Browser:
• Grafana plugins:
  • Alert List
  • Azure Monitor
  • Carpet plot
  • CloudWatch
  • Dashboard list
  • Discrete
  • Elasticsearch
  • Gauge
  • Getting Started
  • Graph
  • Graphite
  • Heatmap
  • InfluxDB
  • Loki
  • Microsoft SQL Server
  • MySQL
  • OpenTSDB
  • Plugin list
  • PostgreSQL
  • Prometheus
  • Singlestat
  • Stackdriver
  • Sun and Moon
  • Table
  • TestData DB
  • Text
• Others: Running in Docker (Image f96bf1723e2a)

[torkelo]

So if anyone wants to start on this, setup a prometheus data source and issue a query using $__range in a range vector. Use Query inspector to see what it get's interpolated to.

Below the queries specify a panel relative time override. This changes the panel time range
and it should affect the $__range variable.

The reason it does not is that this code:
https://github.com/grafana/grafana/blob/master/public/app/plugins/datasource/prometheus/datasource.ts#L369

uses timeSrv.timeRange() instead of taking in the time range as function arg (the query method gets a time range), pass the query time range to this function and use that.

[patrick246]

What are the next steps on this issue?