Migration Yelp-Camp WebApp from Heroku to AWS Elastic Beanstalk and MongoDB Atlas to AWS DocumentDB

Table of contents

• Table of contents
• Goal
• Database Migration
  • Steps
• App migration
  • EB CLI
    • Installing the EB CLI using pip
    • use EB to generate the configuration file
  • How to access the logs, so helpful
  • Errors Encountered
    • Environment variables
    • See the status of the Elastic Beanstalk
    • Cloudformation failed multiple times trying to create my stack
    • Nginx 502
  • Configuring Express app for Elastic Beanstalk
• References

Goal

• migrate a web app that was built as the main project for a web developer bootcamp udemy class to AWS.
• The app was built with ExpressJS as the backend and bootstrap for the frontend
• We want to migrate the following
  • Mongodb to AWS DocumentDB
  • Heroku to Elastic Beanstalk for the hosting of the webapp

Database Migration

Steps

• backedup the db that was uploaded to mongodb atlas
• just created a DocumentDB single instance and imported all the data there
• DocumentDB does not have a public endpoint, meaning that you cannot connect to the db from your local computer it has to be from a vpc

App migration

EB CLI

• 

Installing the EB CLI using pip

• pip install awsebcli
• The AWS Elastic Beanstalk Command Line Interface (EB CLI) is a command line client that you can use to create, configure, and manage Elastic Beanstalk environments. For more information about the EB
• Installing the cli

use EB to generate the configuration file

• eb init --platform node.js --region us-east-2
  • this will require an access key and secret key
    • to create these go into iam and create access keys for a user you would like to use preferrably not the root user
  • This will create a folder in the root directory named .elasticbeanstalk
  • This will create a file under that folder named config.yml

    branch-defaults:
      main:
        environment: YelpCamp-env
    environment-defaults:
      YelpCamp-env:
        branch: null
        repository: null
    global:
      application_name: YelpCamp
      default_ec2_keyname: YelpCamp
      default_platform: Node.js 18
      default_region: us-east-2
      include_git_submodules: true
      instance_profile: null
      platform_name: null
      platform_version: null
      profile: eb-cli
      sc: git
      workspace_type: Application
    

How to access the logs, so helpful

• explain

Errors Encountered

Environment variables

• eb setenv
• eb printenv

See the status of the Elastic Beanstalk

• eb status

Cloudformation failed multiple times trying to create my stack

• Errors I would get
• 

Nginx 502

• explain
• created new file .ebextensions/app.config

  • option_settings:
    aws:elasticbeanstalk:application:environment:
    PORT: "8080"
    

Configuring Express app for Elastic Beanstalk

• couple of steps must be performed in order to get the app ready to be deployed to elastic beanstalk
  • Deploying expressjs to aws

References