Merge pull request #31 from aws-samples/hb-dev-update

updated sample app ebextensions, updated syntax and conventions

Author: hacbrown

.ebextensions/options.config

@@ -8,5 +8,5 @@ option_settings:
     NEW_SIGNUP_TOPIC: '`{"Ref" : "NewSignupTopic"}`'
   aws:elasticbeanstalk:container:nodejs:
     ProxyServer: nginx
-  aws:elasticbeanstalk:container:nodejs:staticfiles:
+  aws:elasticbeanstalk:environment:proxy:staticfiles:
     /static: /static

.gitignore

@@ -2,3 +2,4 @@
 
 # Elastic Beanstalk CLI Files
 .elasticbeanstalk/*
+node_modules/*

README.md

@@ -1,8 +1,25 @@
-# AWS Elastic Beanstalk Express Sample App
+# AWS Elastic Beanstalk Express Sample App with Dynamo
 This sample application uses the [Express](https://expressjs.com/) framework and [Bootstrap](http://getbootstrap.com/) to build a simple, scalable customer signup form that is deployed to [AWS Elastic Beanstalk](http://aws.amazon.com/elasticbeanstalk/). The application stores data in [Amazon DynamoDB](http://aws.amazon.com/dynamodb/) and publishes notifications to the [Amazon Simple Notification Service (SNS)](http://aws.amazon.com/sns/) when a customer fills out the form.
 
-## Features
-### Themes
+This example cannot be run locally.
+
+You can get started using the following steps:
+  1. Install the [AWS Elastic Beanstalk Command Line Interface (CLI)](http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/eb-cli3-install.html).
+  2. Add policies to the [default instance profile](https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/iam-instanceprofile.html) to grant the EC2 instances in your environment permission to access DynamoDB and Amazon SNS:
+      - Open the [Roles](https://console.aws.amazon.com/iam/home#roles) page in the IAM console.
+      - Choose `aws-elasticbeanstalk-ec2-role`.
+      - On the Permissions tab, choose Attach policies.
+      - Select the managed policy for the additional services that your application uses. For this specific example, add `AmazonSNSFullAccess` and `AmazonDynamoDBFullAccess`.
+      - Choose Attach policy.
+  3. Run `eb init --platform node.js --region <region>` to initialize the folder for use with the CLI. Replace `<region>` with a region identifier such as `us-east-2` (see [Regions and Endpoints](https://docs.amazonaws.cn/en_us/general/latest/gr/rande.html#elasticbeanstalk_region) for a full list of region identifiers). 
+  4. Run `eb create --sample nodejs-example-express-dynamo` to begin the creation of a sample application that contains a load-balanced environment with the default settings for the Node.js platform.
+  5. Once the environment creation process completes, run `eb open` to load the sample environment in your browser to verify the deployment has succeeded and is accessible.
+  6. Deploy the source in this bundle using `eb deploy`.
+  7. Once the deployment of this source bundle completes, run `eb open` to interact with the new webpage.
+  8. Run `eb terminate --all` to clean up.
+
+
+## Themes
 The code includes several Bootstrap themes from [bootswatch.com](http://bootswatch.com/). You can dynamically change the active theme by setting the THEME environment variable in the [Elastic Beanstalk Management Console](https://console.aws.amazon.com/elasticbeanstalk):
 
 ![](misc/theme-flow.png)
@@ -13,20 +30,4 @@ Installed themes include:
 * [default](http://bootswatch.com/default)
 * [flatly](http://bootswatch.com/flatly)
 * [slate](http://bootswatch.com/slate)
-* [united](http://bootswatch.com/united)
-
-You can get started using the following steps:
-  1. [Install the AWS Elastic Beanstalk Command Line Interface (CLI)](http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/eb-cli3-install.html).
-  2. Create an IAM Instance Profile named **aws-elasticbeanstalk-sample-role** with the policy in [iam_policy.json](iam_policy.json). For more information on how to create an IAM Instance Profile, see [Create an IAM Instance Profile for Your Amazon EC2 Instances](https://docs.aws.amazon.com/codedeploy/latest/userguide/how-to-create-iam-instance-profile.html).
-  3. Run `eb init -r <region> -p "Node.js"` to initialize the folder for use with the CLI. Replace `<region>` with a region identifier such as `us-west-2` (see [Regions and Endpoints](https://docs.amazonaws.cn/en_us/general/latest/gr/rande.html#elasticbeanstalk_region) for a full list of region identifiers). For interactive mode, run `eb init` then,
-    1. Pick a region of your choice.
-    2. Select the **[ Create New Application ]** option.
-    3. Enter the application name of your choice.
-    4. Answer **yes** to *It appears you are using Node.js. Is this correct?*.
-    7. Choose whether you want SSH access to the Amazon EC2 instances.  
-      *Note: If you choose to enable SSH and do not have an existing SSH key stored on AWS, the EB CLI requires ssh-keygen to be available on the path to generate SSH keys.*  
-  4. Run `eb create --instance_profile aws-elasticbeanstalk-sample-role` to begin the creation of your environment.
-    1. Enter the environment name of your choice.
-    2. Enter the CNAME prefix you want to use for this environment.
-  5. Once the environment creation process completes, run `eb open` to open the application in a browser.
-  6. Run `eb terminate --all` to clean up.
+* [united](http://bootswatch.com/united)

app.js

@@ -1,14 +1,14 @@
 // Include the cluster module
-var cluster = require('cluster');
+const cluster = require('cluster');
 
 // Code to run if we're in the master process
 if (cluster.isMaster) {
 
     // Count the machine's CPUs
-    var cpuCount = require('os').cpus().length;
+    const cpuCount = require('os').cpus().length;
 
     // Create a worker for each CPU
-    for (var i = 0; i < cpuCount; i += 1) {
+    for (let i = 0; i < cpuCount; i += 1) {
         cluster.fork();
     }
 
@@ -23,18 +23,18 @@ if (cluster.isMaster) {
 
 // Code to run if we're in a worker process
 } else {
-    var AWS = require('aws-sdk');
-    var express = require('express');
-    var bodyParser = require('body-parser');
+    const AWS = require('aws-sdk');
+    const express = require('express');
+    const bodyParser = require('body-parser');
 
     AWS.config.region = process.env.REGION
 
-    var sns = new AWS.SNS();
-    var ddb = new AWS.DynamoDB();
+    const sns = new AWS.SNS();
+    const ddb = new AWS.DynamoDB();
 
-    var ddbTable =  process.env.STARTUP_SIGNUP_TABLE;
-    var snsTopic =  process.env.NEW_SIGNUP_TOPIC;
-    var app = express();
+    const ddbTable =  process.env.STARTUP_SIGNUP_TABLE;
+    const snsTopic =  process.env.NEW_SIGNUP_TOPIC;
+    const app = express();
 
     app.set('view engine', 'ejs');
     app.set('views', __dirname + '/views');
@@ -49,7 +49,7 @@ if (cluster.isMaster) {
     });
 
     app.post('/signup', function(req, res) {
-        var item = {
+        const item = {
             'email': {'S': req.body.email},
             'name': {'S': req.body.name},
             'preview': {'S': req.body.previewAccess},
@@ -62,7 +62,7 @@ if (cluster.isMaster) {
             'Expected': { email: { Exists: false } }        
         }, function(err, data) {
             if (err) {
-                var returnStatus = 500;
+                let returnStatus = 500;
 
                 if (err.code === 'ConditionalCheckFailedException') {
                     returnStatus = 409;
@@ -89,9 +89,9 @@ if (cluster.isMaster) {
         });
     });
 
-    var port = process.env.PORT || 3000;
+    const port = process.env.PORT || 3000;
 
-    var server = app.listen(port, function () {
+    const server = app.listen(port, function () {
         console.log('Server running at http://127.0.0.1:' + port + '/');
     });
 }