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Get Data Stream API

Introduced 1.0

The Get Data Stream API returns information about one or more data streams, including their backing indexes, generation, and status.

Endpoints

GET /_data_stream
GET /_data_stream/{name}

Path parameters

The following table lists the available path parameters. All path parameters are optional.

Parameter Data type Description
name List or String A comma-separated list of data stream names used to limit the request. Wildcard (*) expressions are supported. If omitted, all data streams are returned.

Query parameters

The following table lists the available query parameters. All query parameters are optional.

Parameter Data type Description Default
error_trace Boolean Whether to include the stack trace of returned errors. false
filter_path List or String Used to reduce the response. This parameter takes a comma-separated list of filters. It supports using wildcards to match any field or part of a field’s name. You can also exclude fields with -. N/A
human Boolean Whether to return human-readable values for statistics. false
pretty Boolean Whether to pretty format the returned JSON response. false
source String The URL-encoded request definition. Useful for libraries that do not accept a request body for non-POST requests. N/A

Example request

The following example request returns information about all data streams in the cluster:

GET /_data_stream
response = client.indices.get_data_stream()

To return information about a specific data stream, provide its name as the name path parameter:

GET /_data_stream/logs-app
response = client.indices.get_data_stream(
  name = "logs-app"
)

Example response

{
  "data_streams": [
    {
      "name": "logs-app",
      "timestamp_field": {
        "name": "@timestamp"
      },
      "indices": [
        {
          "index_name": ".ds-logs-app-000001",
          "index_uuid": "23dD0HE5Sg2kSLLAP_YtNA"
        }
      ],
      "generation": 1,
      "status": "YELLOW",
      "template": "template-logs-app"
    }
  ]
}

Response body fields

Field Data type Description
data_streams Array A list of objects, one for each data stream. For object fields, see The data stream objects.

The data stream objects

Each data stream object contains the following fields.

Field Data type Description
name String The name of the data stream.
timestamp_field Object The timestamp field configuration for the data stream.
timestamp_field.name String The name of the timestamp field, usually @timestamp.
indices Array A list of the data stream’s backing indexes. The last item in the array is the current write index. For object fields, see The backing index objects.
generation Integer The current generation of the data stream. This number increases by one with each rollover.
status String The health status of the data stream, based on the health of its backing indexes. Valid values are GREEN, YELLOW, and RED.
template String The name of the index template used to create the data stream.
hidden Boolean Whether the data stream is hidden.
system Boolean Whether the data stream is managed internally by OpenSearch and cannot be modified through normal user interaction.
ilm_policy String The name of the associated Index State Management (ISM) policy, if one is configured.
allow_custom_routing Boolean Whether the data stream allows custom routing on write requests.
_meta Object Custom metadata attached to the data stream.

The backing index objects

Each backing index object contains the following fields.

Field Data type Description
index_name String The name of the backing index.
index_uuid String The UUID of the backing index.

Required permissions

If you use the Security plugin, make sure you have the appropriate permissions: indices:admin/data_stream/get.

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