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Address feedback on Lamda page #9895

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Address feedback on Lamda page
Naarcha-AWS May 13, 2025
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Merge branch 'main' into data-prepper-feedback
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26 changes: 15 additions & 11 deletions _data-prepper/pipelines/configuration/processors/aws-lambda.md
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Expand Up @@ -10,16 +10,15 @@

The [AWS Lambda](https://aws.amazon.com/lambda/) integration allows developers to use serverless computing capabilities within their OpenSearch Data Prepper pipelines for flexible event processing and data routing.

## AWS Lambda processor configuration

The `aws_lambda` processor enables invocation of an AWS Lambda function within your Data Prepper pipeline in order to process events. It supports both synchronous and asynchronous invocations based on your use case.

## Configuration fields

You can configure the processor using the following configuration options.

Field | Type | Required | Description
-------------------- | ------- | -------- | ----------------------------------------------------------------------------
Field | Type | Required | Description
:--- | :------- | :--- | :---
`function_name` | String | Required | The name of the AWS Lambda function to invoke.
`invocation_type` | String | Required | Specifies the invocation type, either `request-response` or `event`. Default is `request-response`.
`aws.region` | String | Required | The AWS Region in which the Lambda function is located.
Expand All @@ -29,18 +28,24 @@
`lambda_when` | String | Optional | A conditional expression that determines when to invoke the Lambda processor.
`response_codec` | Object | Optional | A codec configuration for parsing Lambda responses. Default is `json`.
`tags_on_match_failure` | List | Optional | A list of tags to add to events when Lambda matching fails or encounters an unexpected error.
`sdk_timeout` | Duration| Optional | Configures the SDK's client connection timeout period. Default is `60s`.
`sdk_timeout` | Duration | Optional | Configures the SDK's client connection timeout period. Default is `60s`.

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[OpenSearch.Spelling] Error: SDK's. If you are referencing a setting, variable, format, function, or repository, surround it with tic marks.
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{"message": "[OpenSearch.Spelling] Error: SDK's. If you are referencing a setting, variable, format, function, or repository, surround it with tic marks.", "location": {"path": "_data-prepper/pipelines/configuration/processors/aws-lambda.md", "range": {"start": {"line": 31, "column": 61}}}, "severity": "ERROR"}
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this was renamed to connection_timeout, we can update other fields as well - reference-link

`response_events_match` | Boolean | Optional | Specifies how Data Prepper interprets and processes Lambda function responses. Default is `false`.

#### Example configuration
The `invocation_type` field is not supported in Amazon OpenSearch Ingestion pipelines using the `aws_lambda` processor. Including this field will result in a validation error.
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Why is this field in the table above if it is not supported? Are there discrepancies between these docs and what AWS supports? If so are they documented anywhere? In my mind adding just this blurb adds more confusion.

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@Naarcha-AWS Naarcha-AWS Jun 3, 2025 •
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@rpash: Based on your experience (issue #9872), that would seem to be the case. That being said, I have no additional insight on what additional discrepancies may exist between Data Prepper, OSI, and what AWS supports. This PR is only meant to address feedback on the AWS Lamda page specifically.

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@dlvenable or @srikanthjg: Is there an alternative method or parameter for adjusting the invocation_type? Should we just remove the field and section from the docs entirely?

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for opensource dataprepper, this field is needed an is used in both lambda processor and sink.

  1. request-response (default for the processor): This is mapped to AWS Lambda's
    "RequestResponse" invocation type. When using this mode. This is synchronous processing, where the pipeline waits for the Lambda result

  2. event (default for the sink): This is mapped to AWS Lambda's "Event" invocation type.
    When using this mode The request is sent to Lambda asynchronously and Data Prepper doesn't wait for a response

{: .note}


## Usage

This example configures the `aws_lambda` processor to invoke a Lambda function with advanced batching, conditional invocation, retry logic, and cross-region AWS credentials:

```
processors:
- aws_lambda:
function_name: "my-lambda-function"
invocation_type: "request-response"
response_events_match: false
aws:
arn: "arn:aws:lambda:us-west-2:123456789012:function:my-processing-function"
timeout: 2000
batch_size: 10
aws:
region: "us-east-1"
sts_role_arn: "arn:aws:iam::123456789012:role/my-lambda-role"
max_retries: 3
Expand All @@ -51,11 +56,10 @@
maximum_size: "5mb"
event_collect_timeout: PT10S
lambda_when: "event['status'] == 'process'"

```
{% include copy-curl.html %}

## Usage
## Invocation types

The processor supports the following invocation types:

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