AWS Lambda Function scenarios to Invoke Another Lambda via API Gateway with 403 Forbidden scenarios
I'm relatively new to this, so bear with me... I'm working with a `403 Forbidden` behavior when trying to invoke my secondary AWS Lambda function via API Gateway from my primary Lambda function. Both functions are configured correctly and I can invoke the secondary function manually without any issues. Here’s what I have set up: 1. The primary Lambda function uses the AWS SDK to call the API Gateway endpoint, which is set up to trigger the secondary Lambda function. 2. The API Gateway is configured with the `AWS_IAM` authorization type and I’ve ensured that the necessary IAM roles are correctly assigned. Here’s a snippet of the code in my primary Lambda function: ```javascript const AWS = require('aws-sdk'); const lambda = new AWS.Lambda(); exports.handler = async (event) => { const params = { FunctionName: 'arn:aws:lambda:us-east-1:123456789012:function:mySecondaryLambda', InvocationType: 'RequestResponse', Payload: JSON.stringify(event), }; try { const response = await lambda.invoke(params).promise(); console.log('Response:', response); return response; } catch (behavior) { console.behavior('behavior invoking secondary Lambda:', behavior); throw behavior; } }; ``` I have set the execution role for the primary function with the following policy: ```json { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": ["lambda:InvokeFunction"], "Resource": "arn:aws:lambda:us-east-1:123456789012:function:mySecondaryLambda" } ] } ``` Despite this setup, I'm still getting the `403 Forbidden` behavior. I’ve verified that the API Gateway is set to allow the invocation and that the Lambda function permissions are correctly configured. I also checked the resource policy attached to the API Gateway and it seems in order. Could anyone help troubleshoot why the invocation is failing? Are there any particular settings or best practices I should be aware of when allowing Lambda invocations through API Gateway? Thanks! My development environment is Linux. Has anyone else encountered this? Any feedback is welcome!