Question

我想同时从多个lambda触发lambda函数。我遵循的架构是 lambda->步骤功能->并行执行2 lambda->这两个lambda应该触发一个lambda。来自这两个lambda的事件应传递给一个lambda。

直到我已经实现了从阶跃函数触发两个lambda函数为止。触发lambda函数，我编写了以下代码。但只有在lambda事件上才会传递给下一个lambda。

from boto3 import client as botoClient
import json
lambdas = botoClient("lambda")

def lambda_handler(event, context):

    response = lambdas.invoke(FunctionName="lambda-name", 
                              InvocationType="RequestResponse", 
                               Payload=json.dumps(event))
    return {
        'statusCode': 200,
        'body': json.dumps('Hello from Lambda!')
    }

Answer 1

以下是从另一个Lambda函数调用Lambda函数的代码段-

let AWS = require('aws-sdk');
let util = require('util');

module.exports.proxyAPIRequest = async () => {

    let client = new AWS.Lambda({
        region: "us-east-1"
    });

    let requestPayload = {
        'someKey' : 'someValue'
    };

    requestPayload = JSON.stringify(requestPayload);
    console.log("Payload => ", requestPayload);

    let params = {
        FunctionName: functionName,
        InvocationType: "RequestResponse", 
        Payload: requestPayload
    };

    let lambda = util.promisify(client.invoke).bind(client);
    let response = await lambda(params);

    console.log(response.Payload);

    return response.Payload;
};

确保您的调用方Lambda函数有权调用另一个函数-

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "Lambda permission",
      "Action": [
        "lambda:InvokeFunction"
      ],
      "Effect": "Allow",
      "Resource": "arn:aws:lambda:awsRegion:awsAccountId:function:functionName"
    }
  ]
}

如何同时从多个Lambda触发一个Lambda函数

1 个答案: