Using Elasticsearch in Grafana

Grafana ships with advanced support for Elasticsearch. You can do many types of simple or complex Elasticsearch queries to visualize logs or metrics stored in Elasticsearch. You can also annotate your graphs with log events stored in Elasticsearch.

Adding the data source

  1. Open the side menu by clicking the Grafana icon in the top header.
  2. In the side menu under the Dashboards link you should find a link named Data Sources.
  3. Click the + Add data source button in the top header.
  4. Select Elasticsearch from the Type dropdown.

NOTE: If you’re not seeing the Data Sources link in your side menu it means that your current user does not have the Admin role for the current organization.

NameDescription
NameThe data source name. This is how you refer to the data source in panels & queries.
DefaultDefault data source means that it will be pre-selected for new panels.
UrlThe HTTP protocol, IP, and port of your Elasticsearch server.
AccessProxy = access via Grafana backend, Direct = access directly from browser.

Proxy access means that the Grafana backend will proxy all requests from the browser, and send them on to the Data Source. This is useful because it can eliminate CORS (Cross Origin Site Resource) issues, as well as eliminate the need to disseminate authentication to the browser.

Direct access

If you select direct access you must update your Elasticsearch configuration to allow other domains to access Elasticsearch from the browser. You do this by specifying these to options in your elasticsearch.yml config file.

http.cors.enabled: true
http.cors.allow-origin: "*"

Index settings

Here you can specify a default for the time field and specify the name of your Elasticsearch index. You can use a time pattern for the index name or a wildcard.

Elasticsearch version

Be sure to specify your Elasticsearch version in the version selection dropdown. This is very important as there are differences how queries are composed. Currently only 2.x and 5.x are supported.

Metric Query editor

The Elasticsearch query editor allows you to select multiple metrics and group by multiple terms or filters. Use the plus and minus icons to the right to add/remove metrics or group by clauses. Some metrics and group by clauses haves options, click the option text to expand the row to view and edit metric or group by options.

Series naming & alias patterns

You can control the name for time series via the Alias input field.

PatternDescription
{{term fieldname}}replaced with value of a term group by
{{metric}}replaced with metric name (ex. Average, Min, Max)
{{field}}replaced with the metric field name

Pipeline metrics

Some metric aggregations are called Pipeline aggregations, for example, Moving Average and Derivative. Elasticsearch pipeline metrics require another metric to be based on. Use the eye icon next to the metric to hide metrics from appearing in the graph. This is useful for metrics you only have in the query for use in a pipeline metric.

Templating

Instead of hard-coding things like server, application and sensor name in you metric queries you can use variables in their place. Variables are shown as dropdown select boxes at the top of the dashboard. These dropdowns makes it easy to change the data being displayed in your dashboard.

Checkout the Templating documentation for an introduction to the templating feature and the different types of template variables.

Query variable

The Elasticsearch data source supports two types of queries you can use in the Query field of Query variables. The query is written using a custom JSON string.

QueryDescription
*{“find”: “fields”, “type”: “keyword”}Returns a list of field names with the index type keyword.
{“find”: “terms”, “field”: “@hostname”}Returns a list of values for a field using term aggregation. Query will user current dashboard time range as time range for query.
{“find”: “terms”, “field”: “@hostname”, “query”: ‘’}Returns a list of values for a field using term aggregation & and a specified lucene query filter. Query will use current dashboard time range as time range for query.

You can use other variables inside the query. Example query definition for a variable named $host.

{"find": "terms", "field": "@hostname", "query": "@source:$source"}

In the above example, we use another variable named $source inside the query definition. Whenever you change, via the dropdown, the current value of the $source variable, it will trigger an update of the $host variable so it now only contains hostnames filtered by in this case the @source document property.

Using variables in queries

There are two syntaxes:

  • $<varname> Example: @hostname:$hostname
  • [[varname]] Example: @hostname:[[hostname]]

Why two ways? The first syntax is easier to read and write but does not allow you to use a variable in the middle of a word. When the Multi-value or Include all value options are enabled, Grafana converts the labels from plain text to a lucene compatible condition.

In the above example, we have a lucene query that filters documents based on the @hostname property using a variable named $hostname. It is also using a variable in the Terms group by field input box. This allows you to use a variable to quickly change how the data is grouped.

Example dashboard: Elasticsearch Templated Dashboard

Annotations

Annotations allows you to overlay rich event information on top of graphs. You add annotation queries via the Dashboard menu / Annotations view. Grafana can query any Elasticsearch index for annotation events.

NameDescription
QueryYou can leave the search query blank or specify a lucene query
TimeThe name of the time field, needs to be date field.
TitleThe name of the field to use for the event title.
TagsOptional field name to use for event tags (can be an array or a CSV string).
TextOptional field name to use event text body.