/workshop-serverless-graphql

Primary LanguageTypeScript

Serverless GraphQL Workshop by Levi9

Prerequisite

  • Free tier AWS account
  • Laptop
  • Basic knowledge of JavaScript

Workshop outline

Topics covered

  1. Basic concepts of Cloud Computing
  2. Introduction to AWS concepts (Regions, Availability Zones)
  3. AWS Account and how to use it
  4. Sample app architecture and deployment strategy
  5. Identity & Access Management
  6. Computing - AWS Lambda functions and triggers (SQS, DynamoDB Streams, API Gateway)
  7. Queueing services - SQS, Kinesis
  8. Databases - AWS DynamoDB
  9. Graphql introduction --> Intro to Graphql Workshop
  10. Storage - S3 Bucket
  11. Monitoring – Cloud watch
  12. Caching - Cloud Front
  13. Edge location computing - Lambda@Edge
  14. Networking, VPC, Subnets
  15. Serverless as a concept vs Serverless as a framework
  16. Serverless framework
  17. Running locally
  18. Microservices architecture
  19. Cost analysis

What are we going to build

Using CryptoCompare API we are going to fetch Crypto currencies data periodically and keep it providing historical data to client over GraphQL API.

API contains Crypto currency images that we are going to serve from S3 bucket though CloudFront and Lambda@Edge.

Client will be React application with Apollo client.

What are we going to use to do it

  • AWS Lambda
  • SQS
  • DynamoDB
  • API Gateway
  • IAM
  • CloudFront
  • CloudWatch
  • CloudFormation
  • S3 Bucket
  • Lambda@Edge
  • AWS SSM

Most of these will be managed through Serverless framework.

API used

To fetch data from CryptoCompare API, create an account and obtain API key.

Once API key is obtained, put it to AWS SSM to store it securely

aws ssm put-parameter --name API_KEY --value apikeyhere --type SecureString --key-id alias/aws/ssm --region us-east-1 --overwrite

You will fetch it in the app by requesting it from AWS SSM Parameter Store

const ssm = new SSM();
const req: GetParametersRequest = {
    Names: ['API_KEY_{your-stage}'],
    WithDecryption: true,
};
const response = await ssm.getParameters(req).promise();
const apiKey = response.Parameters[0].Value;

Systerm architecture

system diagram