Sample Startup Project

WIP Warning

It's essentially a fancier "Hello World" app. This demo app is current WIP and not to be considered a reference architecture yet. The Cloud Pathfinder team intends to provide a proper CI/CD pattern and clean up rough edges. For now it has been used internally for testing purposes. Stay tuned we intend to have this improved soon.

Introduction

Welcome to your new project. This is a basic starter project with a NodeJS app connected to a database for you to modify and expand to fit your needs. It provides scripts for developing and running locally, as well as "Infrastructure-as-Code" using Terraform/Terragrunt to allow the app to be easily deployed to public cloud environments. Currently, AWS is supported, but support for other cloud targets may be added in the future.

Prerequisites

In order to develop or run the app locally, you will need:

• a bash-like terminal environment; testing has primarily been done using MacOS Catalina, Ubuntu Linux, and Windows 10 (WSL2)
• make
• Docker

Local Setup

Install Prerequisites

# MacOS and Ubuntu 20.04, Windows 10 (WSL2 - Ubuntu 20.04), if make is installed
make local-setup

# MacOS, if make is not installed
./.config/local/darwin.sh

# Ubuntu 20.04, Windows 10 (WSL2 - Ubuntu 20.04), if make is not installed
./.config/local/linux.sh

One-time Setup

# setup development environment
make setup-development-env

Build and Run Locally using Docker

make local

VS Code

# initialize vscode project config
make vscode-copy-config

# open the project in vscode
make vscode

AWS Credentials

This code assumes that the Terraform Cloud workspaces are pre-populated wth AWS credential environment variables. The workspaces and credentials are automatically created as part of the project provisioning. These credentials are used for creating all resources with terraform.

Additional service account iam users and credentials can be created upon request for performing limited actions like pushing to ECR from a CI/CD. This project uses one of those service accounts to push images to ECR in the sandbox account.

When an additional service account is requested the following values will be provided:

• AWS_ACCESS_KEY_ID - credentials for you service account
• AWS_SECRET_ACCESS_KEY - credentials for you service account
• AWS_ROLE_TO_ASSUME - ARN of the role to assume with your credentials

AWS Elastic Container Registry (ECR)

This project creates an ECR repository in the sandbox account and authorizes read access from other AWS accounts. This is useful for deploying to ECS.

The GitHub secret AWS_ACCOUNTS_ECR_READ_ACCESS is used by the ECR terraform module to authorize the read access from the other AWS accounts.

The following GitHub secret value would allow the dev, test, and prod accounts to read from ECS in the sandbox account:

AWS_ACCOUNTS_ECR_READ_ACCESS='["arn:aws:iam::DEV_ACCOUNT_NUMBER:root", "arn:aws:iam::TEST_ACCOUNT_NUMBER:root", "arn:aws:iam::PROD_ACCOUNT_NUMBER:root"]'

A more target approach is possible, it is not necessary to authorize entire accounts.

GitHub Actions (CI/CD)

Required Secrets

• AWS_ACCESS_KEY_ID - credentials for you service account
• AWS_SECRET_ACCESS_KEY - credentials for you service account
• AWS_ROLE_TO_ASSUME - ARN of the role to assume with your credentials
• AWS_ACCOUNTS_ECR_READ_ACCESS - list of aws principals to grant read access
• AWS_ECR_URI - ECR repository URI
• AWS_REGION - should be ca-central-1
• TFC_TEAM_TOKEN - Terraform Cloud team token with access to Terraform workspaces used to deploy the app and infrastructure to AWS.

Workflows

GitHub Action workflows in .github/workflows are used to build, test, and deploy the application. The diagram below illustrates the workflow architecture.

Cloud Deployment

Terraform and Terragrunt are used to deploy the application to AWS.

Terraform App Module

The infrastructure for the app is defined in the terraform module linked below and instantiated using Terragrunt (config is in the terraform/ folder).

startup-sample-project-terraform-modules

Public Access

Once your application infrastructure as been provisioned you can get a public url for your application by submitting a request in the #aws-lz2 channel on Rocket.Chat (chat.pathfinder.gov.bc.ca).

Please submit your request with the following information:

• license plate
• service name
• environment (Dev/Test/Prod)
• alb_hostname

License

Copyright 2020 Province of British Columbia

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

<http://www.apache.org/licenses/LICENSE-2.0>

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.