David 57abf39f25 Logs: Use result range instead of timepicker range for log histogram (#25027)
* Logs: Use result range instead of timepicker range for log histogram

If a logs datasource does not send histogram data for the requested
time range, the logs model computes a timeseries based on the log row
counts, bucketed by an automcatically calculated time interval. Even
when this histogram time series did not span the whole requested time
range it was still rendered in the graph across the whole range, leaving
an empty area at its start. Users find this confusing and are lead to
believe their log data is missing.

This change fixes this by anchoring the start of the timeseries on the
first log row's timestamp from the result, and adds this smaller range
as `visibleRange` to the logs model and passes it through to the logs
component that optionally takes it into account to not render the empty
area.
The interval (bucket size) is also adjusted to account for a potentially
finer resolution on the shorter visible time interval.
The bucketsize multiplier was also changed from 10 to 20 to account for
the space between the chart's bars.

* Aligned visible range with buckets

* Extract bucket size calculation and add test
2020-05-29 15:39:13 +02:00
…
2020-04-08 14:13:05 +02:00
2020-02-08 02:40:04 +01:00
2020-02-08 02:40:04 +01:00
2020-05-12 12:48:26 +02:00
2020-05-26 14:50:43 +02:00
…
…

Grafana

The open-source platform for monitoring and observability.

License Circle CI Go Report Card

Grafana allows you to query, visualize, alert on and understand your metrics no matter where they are stored. Create, explore, and share dashboards with your team and foster a data driven culture:

  • Visualize: Fast and flexible client side graphs with a multitude of options. Panel plugins for many different way to visualize metrics and logs.
  • Dynamic Dashboards: Create dynamic & reusable dashboards with template variables that appear as dropdowns at the top of the dashboard.
  • Explore Metrics: Explore your data through ad-hoc queries and dynamic drilldown. Split view and compare different time ranges, queries and data sources side by side.
  • Explore Logs: Experience the magic of switching from metrics to logs with preserved label filters. Quickly search through all your logs or streaming them live.
  • Alerting: Visually define alert rules for your most important metrics. Grafana will continuously evaluate and send notifications to systems like Slack, PagerDuty, VictorOps, OpsGenie.
  • Mixed Data Sources: Mix different data sources in the same graph! You can specify a data source on a per-query basis. This works for even custom datasources.

Grafana 7.0 and GrafanaCONline

Want to learn more about Grafana 7 and more? Sign up for our online conference!

GrafanaCONline

Get started

Unsure if Grafana is for you? Watch Grafana in action on play.grafana.org!

Documentation

The Grafana documentation is available at grafana.com/docs.

Contributing

If you're interested in contributing to the Grafana project:

Get involved

License

Grafana is distributed under the Apache 2.0 License.

S
Description
The open and composable observability and data visualization platform. Visualize metrics, logs, and traces from multiple sources like Prometheus, Loki, Elasticsearch, InfluxDB, Postgres and many more.
Readme AGPL-3.0
2.7 GiB
0 Stars 1 Watchers 0 Forks
Languages
TypeScript 52.9%
Go 44.3%
CUE 0.7%
Rich Text Format 0.5%
HTML 0.4%
Other 1%