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f1548b4b11
* Improve wording in docs/sources/reference/annotations.md Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>
79 lines
4.7 KiB
Markdown
79 lines
4.7 KiB
Markdown
+++
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title = "Annotations"
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keywords = ["grafana", "annotations", "documentation", "guide"]
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type = "docs"
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[menu.docs]
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name = "Annotations"
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parent = "dashboard_features"
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weight = 2
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+++
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# Annotations
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{{< docs-imagebox img="/img/docs/v46/annotations.png" max-width="800px" >}}
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Annotations provide a way to mark points on the graph with rich events. When you hover over an annotation
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you can get event description and event tags. The text field can include links to other systems with more detail.
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## Native annotations
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Grafana v4.6+ comes with a native annotation store and the ability to add annotation events directly from the graph panel or via the [HTTP API]({{< relref "../http_api/annotations.md" >}}).
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## Adding annotations
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By holding down Ctrl/Cmd+Click. Adding tags to the annotation will make it searchable from other dashboards.
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{{< docs-imagebox img="/img/docs/annotations/annotation-still.png"
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max-width="600px" animated-gif="/img/docs/annotations/annotation.gif" >}}
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### Adding regions events
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You can also hold down Ctrl/Cmd and select region to create a region annotation.
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{{< docs-imagebox img="/img/docs/annotations/region-annotation-still.png"
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max-width="600px" animated-gif="/img/docs/annotations/region-annotation.gif" >}}
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### Built in query
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After you added an annotation they will still be visible. This is due to the built in annotation query that exists on all dashboards. This annotation query will
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fetch all annotation events that originate from the current dashboard and show them on the panel where they were created. This includes alert state history annotations. You can
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stop annotations from being fetched and drawn by opening the **Annotations** settings (via Dashboard cogs menu) and modifying the query named `Annotations & Alerts (Built-in)`.
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When you copy a dashboard using the **Save As** feature it will get a new dashboard id so annotations created on source dashboard will no longer be visible on the copy. You
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can still show them if you add a new **Annotation Query** and filter by tags. But this only works if the annotations on the source dashboard had tags to filter by.
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### Query by tag
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You can create new annotation queries that fetch annotations from the native annotation store via the `-- Grafana --` data source and by setting *Filter by* to `Tags`. Specify at least
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one tag. For example create an annotation query name `outages` and specify a tag named `outage`. This query will show all annotations you create (from any dashboard or via API) that have the `outage` tag. By default, if you add multiple tags in the annotation query, Grafana will only show annotations that have all the tags you supplied. You can invert the behavior by enabling `Match any` which means that Grafana will show annotations that contains at least one of the tags you supplied.
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In Grafana v5.3+ it's possible to use template variables in the tag query. So if you have a dashboard showing stats for different services and a template variable that dictates which services to show, you can now use the same template variable in your annotation query to only show annotations for those services.
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{{< docs-imagebox img="/img/docs/v53/annotation_tag_filter_variable.png" max-width="600px" >}}
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## Querying other data sources
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Annotation events are fetched via annotation queries. To add a new annotation query to a dashboard
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open the dashboard settings menu, then select `Annotations`. This will open the dashboard annotations
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settings view. To create a new annotation query hit the `New` button.
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<!---->
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{{< docs-imagebox img="/img/docs/v50/annotation_new_query.png" max-width="600px" >}}
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Specify a name for the annotation query. This name is given to the toggle (checkbox) that will allow
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you to enable/disable showing annotation events from this query. For example you might have two
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annotation queries named `Deploys` and `Outages`. The toggles will allow you to decide what annotations
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to show.
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### Annotation query details
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The annotation query options are different for each data source.
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- [Graphite annotation queries]({{< relref "../features/datasources/graphite.md#annotations" >}})
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- [Elasticsearch annotation queries]({{< relref "../features/datasources/elasticsearch.md#annotations" >}})
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- [InfluxDB annotation queries]({{< relref "../features/datasources/influxdb.md#annotations" >}})
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- [Prometheus annotation queries]({{< relref "../features/datasources/prometheus.md#annotations" >}})
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- [MySQL annotation queries]({{< relref "../features/datasources/mysql.md#annotations" >}})
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- [Postgres annotation queries]({{< relref "../features/datasources/postgres.md#annotations" >}})
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- [Loki annotation queries]({{< relref "../features/datasources/loki.md#annotations" >}})
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