ayavilevich

// based on https://gist.github.com/tony-gutierrez/de5b304fd042f6140eb61a31d0ff92d5
async function isLeader() {
    try {
        // get APIs
        var elasticbeanstalk = new AWS.ElasticBeanstalk();
        var ec2 = new AWS.EC2();
        var metadata = new AWS.MetadataService();
        // get ec2 instance id
        const request = new Promise( (resolve, reject) => { // MetadataService.request has no support for promise, make one ourselves
            metadata.request('/latest/meta-data/instance-id', (err, InstanceId) => {

litzinger

/*
If saving AWS creds locally they need to be in ~/.aws/credentials

[default]
aws_access_key_id = foo
aws_secret_access_key = bar
 */

const puppeteer = require('puppeteer');
const AWS = require('aws-sdk');

heathdutton

#!/usr/bin/env bash

# Prevent cron tasks from being ran by multiple instances in Elastic Beanstalk.
# Automatically adjusts to new "leading instance" when scaling up or down.
# Stores the result in an environment variable for other uses as AWS_EB_CRON
#
# This must be ran by cron as the root user to function correctly.
# Anything after this file will be executed as webapp for security.
#
# Example Cron (should be created by .ebextensions):