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Overview

The udagram feed service is a microservice built with ExpressJS and Typescript provisioned for an AWS EKS Cluster. The microservice is refactored from the monolith version of Udagram. The application consists of an simple API that uses a postgres database to create and fetch of items posted into the udagram feed.

Required Software

  1. Node.js 11.15.0
  2. PostgreSQL Community Server

Local Usage

  1. Clone or download the repository
  2. cd into root directory and run npm install
  3. Create a .env file and setup database connection within the config.ts
  4. Run npm run dev to start the local development server.

Docker Usage

  1. Download and install Docker
  2. Clone or download the repository
  3. cd into the root directory
  4. Run the command docker run -d -p 3000:8080 --env POSTGRES_USERNAME=**setup** --env POSTGRES_PASSWORD=**setup** --env POSTGRES_HOST=**setup** --env POSTGRES_DB=**setup** --env URL=**setup** <image-id>

AWS EKS Usage

  1. Install Kubernetes command line tool kubectl.
  2. Create an AWS EKS Cluster and a Node Group
  3. Create a secrets.yaml

Example

apiVersion: v1
kind: Secret
metadata:
  name: secrets
stringData:
  POSTGRES_USERNAME: **setup**
  POSTGRES_PASSWORD: **setup**
  POSTGRES_HOST: **setup**
  POSTGRES_DB: **setup**
  URL: **setup**
  1. Using the AWS CLI run the command aws eks --region <region-of-eks-cluster> update-kubeconfig --name <name-of-cluster>
  2. Using the terminal or command prompt run the command kubectl create -f secrets.yaml
  3. Using the the terminal or command prompt run the command kubectl apply -f deployment.yaml and then run kubectl apply -f service.yaml
  4. Verify the pods are running with kubectl get pods

More on kubernetes

To learn about the kubectl commands visit kubectl docs