This topic includes the release notes for Grafana v8.0. For all details, read the full [CHANGELOG.md](https://github.com/grafana/grafana/blob/master/CHANGELOG.md).
## Grafana OSS features
These features are included in the Grafana open source edition.
The new alerts in Grafana 8.0 are an opt-in feature that centralizes alerting information for Grafana managed alerts and alerts from Prometheus-compatible data sources in one UI and API. You can create and edit alerting rules for Grafana managed alerts, Mimir alerts, and Loki alerts as well as see alerting information from prometheus-compatible data sources in a single, searchable view. For more information, on how to create and edit alerts and notifications, refer to [Grafana Alerting]({{< relref "../alerting" >}}).
As part of the new alert changes, we have introduced a new data source, Alertmanager, which includes built-in support for Prometheus Alertmanager. It is presently in alpha and it not accessible unless alpha plugins are enabled in Grafana settings. For more information, refer to [Alertmanager data source]({{< relref "../datasources/alertmanager" >}}).
> **Note:** Out of the box, Grafana still supports old Grafana alerts. They are legacy alerts at this time, and will be deprecated in a future release.
To learn more about the differences between new alerts and the legacy alerts, refer to [What's New with Grafana 8 Alerts](/docs/grafana/v10.0/alerting/difference-old-new/).
Library panels allow users to build panels that can be used in multiple dashboards. Any updates made to that shared panel will then automatically be applied to all the dashboards that have that panel. For instructions on how to create, add, unlink and manage library panels, refer to [Library panels]({{< relref "../dashboards/build-dashboards/manage-library-panels" >}}).
Data sources can now send real-time updates to dashboards over a websocket connection. This can be used with the [MQTT data source](https://github.com/grafana/mqtt-datasource).
The Prometheus metrics browser allows you to quickly find metrics and select relevant labels to build basic queries. If supported by your Prometheus instance, each metric will show its HELP and TYPE as a tooltip. For more information, refer to [Metrics browser documentation]({{< relref "../datasources/prometheus#metrics-browser" >}}).
The Bar chart panel is a new visualization that supports categorical data. It only supports one data frame and it needs to have at least one string field that will be used as the category for an X or Y axis and one or more numerical fields.
The State timeline visualization shows discrete state changes over time. Each field or series is rendered as a unique horizontal band. This panel works well with string or boolean states, but it can also be used with time series data. When used with time series data, the thresholds are used to turn the numerical values into discrete state regions.
A sister panel to the state timeline is the new Status history panel visualization. It can display periodic states in a grid view. It supports both numerical, string, or boolean states. You can assign colors using value mappings, thresholds, or gradient color. For more information, refer to [Status history]({{< relref "../panels-visualizations/visualizations/status-history" >}}).
This hidden feature of the old Graph panel is now a standalone visualization. It combines a histogram transformation and bar chart visualization into a single, integrated, easy-to-use panel. There is also a new standalone histogram transformation that can be paired with any visualization.
- The Time series panel now supports stacking. For more information, refer to [Graph stacked time series]({{< relref "../panels-visualizations/visualizations/time-series#stack-series" >}}).
You can now expand the node graph for the displayed trace when using the Trace to logs feature. Depending on the data source, this can show spans of the trace as nodes in the graph, or as some additional context like service map based on the current trace.
[Tracing in Explore]({{< relref "../explore/trace-integration" >}}) and [Node graph]({{< relref "../panels-visualizations/visualizations/node-graph" >}}) were updated as a result of these changes.
- The Value mappings feature has been completely redesigned. For more information, refer to [Configure value mappings]({{< relref "../panels-visualizations/configure-value-mappings" >}}).
Grafana 8 comes with a refreshed look and feel, including themes changed to be more accessible. The improved Grafana UI brings a number of adjustments and tweaks that make the application even more fun to use. Enjoy the new home dashboard design!
Under the hood, the new theme architecture enables us to bring more sophisticated themes control in the future.
The new Explore inspector helps you understand and troubleshoot your queries. You can inspect the raw data, export that data to a comma-separated values (CSV) file, export log results in text format, and view query requests.
You can now use the Plugin catalog app to easily manage your plugins from within Grafana. Install, update, and uninstall plugins without requiring a server restart.
We reduced the Grafana initial download size massively, approximately 40%. This means that on slower or mobile connections, the initial login page or home dashboard will load much faster.
All panels that have migrated from Flot to uPlot will also render two to three times faster because the library is much more efficient. Right now, this includes the Time series, Stat, Timeline, Histogram, and Barchart panel visualizations.
#### Operational and runtime performance
These improvements affect any subsequent data updates or interactions, including:
- Streaming performance
- General speed of interaction, such as zooming, tooltips, synchronized cursors, and panel updates while editing
Azure Resource Graph is now supported in the Azure Monitor data source. This is a service in Azure that is designed to extend Azure Resource Management by providing efficient and performant exploration of your Azure resources.
The Azure Monitor data source now supports Managed Identity for users hosting Grafana in Azure to simplify and secure configuring Azure Monitor in Grafana.
Also, in addition to querying Log Analytics Workspaces, you can now query the logs for any individual [supported resource](https://docs.microsoft.com/en-us/azure/azure-monitor/essentials/metrics-supported), or for all resources in a subscription or resource group.
> **Note:** In Grafana 7.5 we started the deprecation for separate Application Insights queries, in favor of querying Application Insights resources through Metrics and Logs. In Grafana 8.0 new Application Insights and Insights Analytics queries cannot be made, and existing queries have been made read-only. For more details, refer to the [Deprecating Application Insights]({{< relref "../datasources/azure-monitor#application-insights-and-insights-analytics--removed-" >}}).
[Elasticsearch data source]({{< relref "../datasources/elasticsearch" >}}) and [Provisioning]({{< relref "../administration/provisioning" >}}) were updated as a result of these changes.
##### Use semver strings to identify Elasticsearch version
We changed how the configured Elasticsearch version is handled. You can now specify via provisioning the full semver string version of your instance (such as “7.12.1”) instead of the old version format based on numbers. There’s no manual intervention needed, the old options will be correctly recognized.
##### Generic support for template variables
You can now use a different interpolation method to use template variables in a more extensive way. You can now use template variables in every query editor field that allows free input.
##### Allow omitting field for metrics that support inline scripts
Metric aggregations can be specified without a field if a script is provided. You can now deselect fields for metrics aggregation when they support scripting.
Previously this was only possible when adding a new metric without selecting a field, because once selected, the field could not have been removed.
##### Allow setting a custom limit for log queries
You can now set a custom line limit for logs queries instead of accepting the previously hard-coded 500. We also simplified the query editor to only show relevant fields when issuing logs queries.
Response values were always interpreted as strings in Elasticsearch responses, which caused issues with some visualization types that applied logic based on numeric values. We now apply some heuristics to detect value types from the first non-empty value in each response.
In a prior release, Cloud Monitoring added _preprocessing_ support in their query editor. This capability has been added to the Cloud Monitoring data source in Grafana.
Whenever a metric is selected in the query editor, a suitable preprocessing option is automatically selected for you. To avoid breaking changes, preprocessing is not enabled by default on existing queries. If you want to use preprocessing for existing queries, you have to manually select one in the query editor.
Values for dashboard variables can be now populated using the [Graphite expand API](https://graphite-api.readthedocs.io/en/latest/api.html#metrics-expand). Expand API is used when the metric query is wrapped in expand() function.
This way, values can contain not only the last matching node from the metric query, but also the full path of the metric. It can also be narrowed down to a specific node with a regular expression.
##### Map Graphite queries to Loki
Graphite queries are now automatically transformed to Loki queries according to user-defined rules when the data source changes in Explore.
[JWT authentication]({{< relref "../setup-grafana/configure-security/configure-authentication/jwt" >}}) was added and [Configuration]({{< relref "../setup-grafana/configure-grafana#authjwt" >}}) was updated as a result of this feature.
[Generic OAuth authentication]({{< relref "../setup-grafana/configure-security/configure-authentication/generic-oauth" >}}) has been updated as a result of these changes.
You can now configure generic OAuth with empty scopes. This allows OAuth Identity Providers that don't use or support scopes to work with Grafana authentication.
You can now configure generic OAuth with strict parsing of the `role_attribute_path`. By default, if the `role_attribute_path` property does not return a role, then the user is assigned the `Viewer` role. You can disable the role assignment by setting `role_attribute_strict = true`. It denies user access if no role or an invalid role is returned.
Grafana has updated its license from Apache 2.0 to the GNU Affero General Public License (AGPL). Please see the related [blog post](/blog/2021/04/20/grafana-loki-tempo-relicensing-to-agplv3/), [Q&A](/blog/2021/04/20/qa-with-our-ceo-on-relicensing/) and [license](https://github.com/grafana/grafana/blob/main/LICENSE) for more details.
You can now add or remove detailed permissions from Viewer, Editor, and Admin org roles, to grant users just the right amount of access within Grafana. Available permissions include the ability to view and manage Users, Reports, and the Access Control API itself. Grafana will support more and more permissions over the coming months.
Grafana caches the results of backend data source queries so that multiple users viewing the same dashboard or panel do not make multiple submissions of the same query to the data source (like Splunk or Snowflake) itself.
This results in faster average load times for dashboards and fewer duplicate queries overall to data sources, which reduces cost and the risk of throttling, reaching API limits, or overloading your data sources.
You can enable caching per data source, and time-to-live (TTL) can be configured globally and per data source. Query caching can be set up with Redis, Memcached, or a simple in-memory cache.
For more information, refer to the [Data source query caching docs]({{< relref "../administration/data-source-management#query-and-resource-caching" >}}).
When creating a report, you can now choose to export Table panels as .csv files attached to your report email. This makes it easier for recipients to view and work with that data.
You can also link back to the dashboard directly from the email, for users who want to see the data live in Grafana. This release also includes some improvements to the Reports list view.
The Grafana Enterprise documentation has been updated to describe more specifically how licensed roles are counted, how they can be updated, and where you can see details about dashboard and folder permissions that affect users' licensed roles.
### Elasticsearch: Use application/x-ndjson content type for multi-search requests
For multi-search requests, we now use the correct application/x-ndjson content type instead of the incorrect application/json. Although this should be transparent to most of the users, if you are running Elasticsearch behind a proxy, then be sure that your proxy correctly handles requests with this content type.
### Prometheus: Update default HTTP method to POST for existing data sources
The default HTTP method for Prometheus data source is now POST, previously it was GET. The POST APIs are there since January 2018 (Prometheus 2.1.0) and they have fewer limitations than the GET APIs. Users with Prometheus instance with version <2.1.0thatusethedefaultHTTPmethodshouldupdatetheirHTTPmethodtoGET.
