ruby-hello-world

Hello,

Thank you very much for your interest in Muppet. As part of the interview process, we would like you to deploy the attached Ruby Sinatra Application to AWS/GCP or any other cloud provider.

How to run locally

bundle install
bundle exec rackup -p 3000

To access the application, navigate to your browser to

http://localhost:3000/hello-world

Requirements

As part of the evaluation process we expect the following:

• Infrastructure as code (eg: terraform, cloudformation, pulumi, aws cdk);
• Solution to be scalable, highly available, secure and repeatable;
• A README
  • Explain your approach, considerations and assumptions you had to make
  • Your other options
  • How can we run the code and recreate the environment
  • What would you add to make this solution production ready?
  • If you had more time, what would you improve?
• Last but not least being able to access the /hello-world endpoint and see hello world being return

You should expect about 2 days worth of effort to complete this. You will be given 5 days as we understand you have personal and work commitment, feel free to let us know if you've finished early or if you need some more time.

Please send us any materials that you created and we will have a walk-through of what you have done afterward.

Thank you very much for your time and let us know if you have any questions.

Cheers, Team Muppet

Dependencies

make .deps

Usage

Heroku

heroku login

heroku apps:create <NAME_OF_APP>

heroku git:remote -a <NAME_OF_APP>

git subtree push --prefix module/local/src heroku main

e.g.

> heroku login
heroku: Press any key to open up the browser to login or q to exit:
Opening browser to https://cli-auth.heroku.com/auth/cli/browser/blablabla
Logging in... done
Logged in as me@gmail.com

> heroku apps:create wahlfeld-ruby-hello-world
Creating ⬢ wahlfeld-ruby-hello-world... done

> heroku git:remote -a wahlfeld-ruby-hello-world
set git remote heroku to https://git.heroku.com/wahlfeld-ruby-hello-world.git

> git subtree push --prefix module/local/src heroku main
git push using:  heroku main
Enumerating objects: 7, done.
Counting objects: 100% (7/7), done.
Delta compression using up to 4 threads
Compressing objects: 100% (4/4), done.
Writing objects: 100% (7/7), 828 bytes | 276.00 KiB/s, done.
Total 7 (delta 0), reused 0 (delta 0), pack-reused 0
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Building on the Heroku-20 stack
remote: -----> Determining which buildpack to use for this app
remote: -----> Ruby app detected
remote: -----> Installing bundler 1.17.3
remote: -----> Removing BUNDLED WITH version in the Gemfile.lock
remote: -----> Compiling Ruby/Rack
remote: -----> Using Ruby version: ruby-2.6.6
remote: -----> Installing dependencies using bundler 1.17.3
remote:        Running: BUNDLE_WITHOUT='development:test' BUNDLE_PATH=vendor/bundle BUNDLE_BIN=vendor/bundle/bin BUNDLE_DEPLOYMENT=1 BUNDLE_GLOBAL_PATH_APPENDS_RUBY_SCOPE=1 bundle install -j4
remote:        Fetching gem metadata from https://rubygems.org/....
remote:        Using bundler 1.17.3
remote:        Fetching ruby2_keywords 0.0.2
remote:        Fetching rack 2.2.3
remote:        Fetching tilt 2.0.10
remote:        Installing tilt 2.0.10
remote:        Installing ruby2_keywords 0.0.2
remote:        Installing rack 2.2.3
remote:        Fetching mustermann 1.1.1
remote:        Installing mustermann 1.1.1
remote:        Fetching rack-protection 2.1.0
remote:        Installing rack-protection 2.1.0
remote:        Fetching sinatra 2.1.0
remote:        Installing sinatra 2.1.0
remote:        Bundle complete! 1 Gemfile dependency, 7 gems now installed.
remote:        Gems in the groups development and test were not installed.
remote:        Bundled gems are installed into `./vendor/bundle`
remote:        Bundle completed (1.85s)
remote:        Cleaning up the bundler cache.

blablabla

remote: -----> Discovering process types
remote:        Procfile declares types     -> (none)
remote:        Default types for buildpack -> console, rake, web
remote:
remote: -----> Compressing...
remote:        Done: 15M
remote: -----> Launching...
remote:        Released v4
remote:        https://wahlfeld-ruby-hello-world.herokuapp.com/ deployed to Heroku
remote:
remote: Verifying deploy... done.
To https://git.heroku.com/wahlfeld-ruby-hello-world.git
 * [new branch]      cf5cf2bc5673e11a88f6dde6a37968c99009ea64 -> main

https://wahlfeld-ruby-hello-world.herokuapp.com/hello-world

AWS

1. Create a Terraform backend S3 bucket to store your state files
2. Copy and paste the template folder somewhere on your computer
3. Configure terraform.tf to point at the S3 bucket you just created
4. Create a file called terraform.tfvars as per the input descriptions in inputs.tf E.g.

aws_region       = "ap-southeast-2"    // Choose a region closest to your physical location

5. Run terraform init && terraform apply

Example folder structure

ruby-hello-world           // (this project)
└── your-ruby-hello-world  // (create me)
    ├── inputs.tf        // (copied from ./template)
    ├── main.tf          // (copied from ./template)
    ├── terraform.tf     // (copied from ./template)
    └── terraform.tfvars // (create me), example above)

Monitoring

To view server monitoring metrics visit the monitoring_url output from Terraform after deploying. Note that this URL will change every time the server starts.

Inputs

Name	Description	Type	Default	Required
aws_region	The AWS region to create the helloworld server	string	n/a	yes
instance_type	AWS EC2 instance type to run the server on	string	"t3a.nano"	no
purpose	The purpose of the deployment	string	"test"	no
unique_id	The ID of the deployment (used for tests)	string	""	no

Outputs

Name	Description
bucket_id	The S3 bucket name
helloworld_url	URL to the helloworld Server
instance_id	The EC2 instance ID
monitoring_url	URL to monitor the helloworld Server