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Homework #7 Amazon Web Services (AWS) with Node.js
Using the instructions below one can establish a service at AWS. Once
established, you will be able to move your Node.js program developed for
Assignment #8 to your AWS instance and have it executed there.
1-4. Sign ups
This section assumes that you have performed the installation for homework #5,
including (1) AWS Sign up, (2) AWS Educate Sign Up, (3) applied for your $100 credit,
and (4) provided your credit card information.
5. Set up the Default Elastic Beanstalk Application
• Click the top left menu Services
• From the list of Amazon Web Services, select Elastic Beanstalk, under
Compute.
• Select Create New Application in the top right, right underneath your account
name, and follow the Wizard.
• In the Application name field, enter a name for your application. Click Create.
• In the Environment section click on the Create One Now hyperlink
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• In the Choose an environment tier dialog select Web server environment and
click on Select button.
• In the Environment Information section, select a Domain (use the default or
check availability of your own subdomain of elasticbeanstalk.com). Click on
“Check availability” button. Your URL should be green. Otherwise you should
change the environment URL.
• In the Base configuration section, choose the Preconfigured platform, and
one of the following options in the drop-down list:
o Platform: Node.js
o Environment Type: Single Instance.
• In the Application Code section, select Sample application.
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• Click Create environment.
• After a minute or so the “Creating <environment-name” dialog appears, with
the message “This will take a few minutes…”
You will need to wait for several minutes as your Linux + Nginx + Node.js instance is
created and launched. You will see several messages appear as the instance is being
created and deployed. a rotating wheel next to the “Monitor” button. Once creation
and launch are completed, you will see the wheel turn into a green round circle with a
check mark in the middle.
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Node.js Instance Dashboard
Beside “<YourEnvironment” subtitle there is a URL such as YourAppNameenv.elasticbeanstalk.com, click on it. You should see the “Congratulations” page. If you
see it as shown below, your application and environment have been created properly.
Then go back to Elastic Beanstalk console.
Node.js Sample Application
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6. Upload your Node.js application
Develop your Node.js server application, and make sure that you name the command
used to start the Node.js application server.js or app.js. Compress the file with ZIP so
that the resulting “source bundle” is named something like nodejs-v1.zip. On a Mac,
you can right click the file or folder and choose compress. On Windows, there are
several free programs, such as 7-Zip or FreeZip, etc. that you can use.
While PHP on AWS comes with all needed libraries included, Node.js comes bare, with
no libraries (also known as “packages”) installed. You can include a package.json
file in your source bundle to install packages during deployment. You use
a package.json file in the root of your project source to use npm to install packages
that your application requires. This is an example package.json file:
{
“name”: “my-app”,
“version”: “0.0.1”,
“private”: true,
“dependencies”: {
“ejs”: “latest”,
“aws-sdk”: “latest”,
“express”: “latest”,
“body-parser”: “latest”
},
“scripts”: {
“start”: “node app.js”
}
}
When a package.json file is present in your bundle, Elastic Beanstalk runs npm
install to install dependencies.
The Node.js platform on AWS includes a proxy server to serve static assets, forward
traffic to your application, and compress responses. The default proxy server is Nginx.
6.1 Upload and Deploy
From the Elastic Beanstalk console, select your environment and click on the Upload
and Deploy button.
The Upload and Deploy popup will display. Enter a Version label (e.g., version 1.0).
Click on the Choose File button and select the nodejs-v1.zip file. Then click on Deploy
button.
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Again, wait several minutes for the rotating wheel to finish and the green circle with
checkmark to appear. Click again on the link “YourAppNameenv.elasticbeanstalk.com”. Check that your Node.js app is running correctly.
• Important Note: in the future if you want to upload an updated version of the
source bundle nodejs-v1.zip, you should enter a different version label.
Otherwise, you will get an error. It is recommended that you use increasing
version numbers (2.0, 2.1, 3.0, or labels such as nodejs-v1, nodejs-v2, etc.)
For additional information, please check the AWS Developer Guide article titled “Using
the AWS Elastic Beanstalk Node.js Platform” at:
http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/create_deploy_nodejs.container.
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