Release notes for Grafana 9.1.0

Features and enhancements

API: Allow creating teams with a user defined identifier. #48710, @papagian
Alerting: Adds interval and For to alert rule details. #53211, @gillesdemey
Alerting: Extend PUT rule-group route to write the entire rule group rather than top-level fields only. #53078, @alexweav
Alerting: Use Adaptive Cards in Teams notifications. #53532, @grobinson-grafana
Azure Monitor: Add Network Insights Dashboard. #50362, @Teddy-Lin
Chore: Improve logging of unrecoverable errors. #53664, @sakjur
Correlations: Add UpdateCorrelation HTTP API. #52444, @Elfo404
Dashboard: Reverted the changes of hiding multi-select and all variable in the datasource picker. #53521, @lpskdl
Geomap: Add alpha day/night layer. #50201, @ryantxu
Geomap: Add measuring tools. #51608, @drew08t
GrafanaUI: Add success state to ClipboardButton. #52069, @evictorero
Heatmap: Replace the heatmap panel with new implementation. #50229, @ryantxu
KVStore: Allow empty value in kv_store. #53416, @spinillos
Prometheus: Promote Azure auth flag to configuration. #53447, @andresmgot
Reports: Save and update in reports should be transactional. (Enterprise)
Reports: Set uid when we don’t receive it in the query. (Enterprise)
Search: Display only dashboards in General folder of Search Folder View. #53607, @lpskdl
Status history/State timeline: Support datalinks. #50226, @jloupdef
Transform: Add a limit transform. #49291, @josiahg
Transformations: Add standard deviation and variance reducers. #49753, @selvavm

Bug fixes

API: Fix snapshot responses. #52998, @papagian
Access Control: Fix permission error during dashboard creation flow. #53214, @IevaVasiljeva
Access Control: Set permissions for Grafana’s test data source. #53247, @IevaVasiljeva
Alerting: Fix migration failure. #53253, @papagian
BarGauge: Show empty bar when value, minValue and maxValue are all equal. #53314, @ashharrison90
Dashboard: Fix color of bold and italics text in panel description tooltip. #53380, @joshhunt
Loki: Fix passing of query with defaults to code mode. #53646, @ivanahuckova
Loki: Fix producing correct log volume query for query with comments. #53254, @ivanahuckova
Loki: Fix showing of unusable labels field in detected fields. #53319, @ivanahuckova
Reports: Fix inconsistency reports. (Enterprise)
Tracing: Fix OpenTelemetry Jaeger context propagation. #53269, @zhichli
Tracing: Fix OpenTelemetry Jaeger context propagation (#53269). #53724, @idafurjes
[9.1.x] Alerting: AlertingProxy to elevate permissions for request forwarded to data proxy when RBAC enabled. #53679, @yuri-tceretian

Breaking changes

Alert notifications to Microsoft Teams now use Adaptive Cards instead of Office 365 Connector Cards. Issue #53532

Starting at 9.1.0, existing heatmap panels will start using a new implementation. This can be disabled by setting the useLegacyHeatmapPanel feature flag to true. It can be tested on a single dashbobard by adding ?__feature.useLegacyHeatmapPanel=true to any dashboard URL. Please report any heatmap migration issues.. The most notable changes are:

Significantly improved rendering performance
When calculating heatmaps, the buckets are now placed on reasonable borders (1m, 5m, 30s etc)
Round cells are no longer supported Issue #50229