Boto3/Python can't invoke lambda function.

[dhmoon91]

Bug Report

Current Behavior

• Boto3 client runs into Conneciton timed outwhen trying to invoke serverless-offline's lambda port.
• Error log: Could not connect to the endpoint URL: "http://localhost:4006/2015-03-31/functions/slackService-dev-slack-service/invocations

Using postman for httpPort triggers local lambda correctly.

Sample Code

serverless.yml:

service: slackService
frameworkVersion: "3"

provider:
  name: aws
  runtime: python3.8
  stackName: ${opt:stage, 'dev'}-${self:service}
  deploymentBucket:
    name: ${opt:stage, 'dev'}-slack-service

plugins:
  - serverless-python-requirements
  - serverless-deployment-bucket
  - serverless-latest-layer-version
  - serverless-offline

functions:
  slack-service:
    handler: app.dispatcher.dispatcher
    events:
      - httpApi: "POST /slack-service"

custom:
  pythonRequirements:
    dockerizePip: true
  serverless-offline:
    lambdaPort: 4006
    httpPort: 4005

• file: dispatcher.py

  
  import json

def dispatcher(event, context): body = { "message": "Go Serverless v3.0! Your function executed successfully!", "input": event, } print("event") print(event) record = event["Records"][0]

response = {"statusCode": 200, "body": json.dumps(body)}

return response

Output from running `sls offline start`: 

Starting Offline at stage dev (us-east-1)

Offline [http for lambda] listening on http://localhost:4006 Function names exposed for local invocation by aws-sdk:

• slack-service: slackService-dev-slack-service │ POST | http://localhost:4005/slack-service │ │ POST | http://localhost:4005/2015-03-31/functions/slack-service/invocations │

How I'm invoking it:

  lambda_client = boto3.client(
                    "lambda",
                    region_name="local",
                    aws_access_key_id="test",
                    aws_secret_access_key="test2",
                    endpoint_url="http://localhost:4006",
                )

lambda_client.invoke(
                    FunctionName="slackService-dev-slack-service",
                    Payload=(json.dumps({"eventId": event.id})),
                )

error msg:

Expected behavior/code

• I believe we are supposed to use the lambdaPort when we want to invoke the function thru lambda client, but it's not working.
• Tried httpPorts just in case as well but those are failling as well.

Environment

• serverless version:
  • Framework Core: 3.25.1
  • Plugin: 6.2.2
  • SDK: 4.3.2
• serverless-offline version: 12.0.4
• node.js version: v16.14.0
• OS: macOS 12.2.1

optional, if you are using any of the following frameworks to invoke handlers

• python version: 3.8.9

Possible Solution

Additional context/Screenshots

[strombergdev]

Did you find a solution for this? Have the same issue.

[TiberioG]

Same issue invoking lambda locally with boto3 inside docker container