Lambda Warmer... by using a Lambda (node.js)

index.js

/*
  Setup a cloudwatch trigger to call this at an interval slightly less than AWS's timeout for making your lambdas cold.
*/
const https = require('https');

// add new lambda endpoints here
const lambdaHttpEndpoints = [
    // add endpoints here
    // e.g. "http://example.com",
];

exports.handler = async (event) => {
    for (const endpoint of lambdaHttpEndpoints) {
        await new Promise((resolve, reject) => {
            const req = https.get(endpoint, function(res) {
                console.log(`${endpoint} response: `, res.statusCode);
                resolve();
            });
        });
    }

    
    const response = {
        statusCode: 200,
        body: 'lambdas are hot',
    };
    return response;
};