REDDIT-BACKEND DEMO

A demo backend for a social platform with posts, threads and reactions.

STACK

• Node.js
• Hapi.js
• Swagger
• Redis
• BeeQueue
• MongoDB
• Docker

Dependency Installations

• NVM-NODEJS-NPM - This backend is written in nodeJS

• Bcrypt - The codebase utilises bcrypt which has a dependency

sudo apt-get install build-essential libffi-dev python-dev

• MONGODB - Our Database

• REDIS - Our Messaging System

• As the system requires docker for launch, follow below links for installation -

  • Docker-Engine
  • Docker-Compose
  • Docker-machine

• On our worker machine install docker.io

sudo apt install docker.io

• Postman

Launch

Open Project Repository in terminal -

• Latest image building and initial local check

sudo chmod +x docker.sh
sudo ./docker.sh

• Once the above had built all images and finished launching. Use localhost:3000 for our test the API endpoints provided below

Launching the Swarm Cluster

• Ready all our manager and worker machines.

• In the manager machine, run below code -

sudo docker swarm init --advertise-addr 192.168.43.8

• The IP address provided will be our gateway for accessing the project.

• Running the above command will output a command for joining the swarm like below -

docker swarm join --token SWMTKN-1-4ptrecnw57hpysjo8eo9r2ye7dr6dnzv953fm3kewg4az5vxa5-49pjkbzmgnjv8p7q6s4l2fgjx 192.168.43.8:2377

• Add sudo and run this command in our worker machines, we will get the output - This node joined as a worker

• We can verify the above by running below command in our manager machine -

sudo docker node ls

• Now run below command in the project directory on the manager machine -

sudo docker stack deploy -c docker-stack.yml --with-registry-auth reddit-demo

• Run below command to list service names -

sudo docker service ls

• Run below commands to see the distribution of services across nodes

sudo docker service ps 'servicename1' 'servicename2' --format 'table {{.ID}}\t{{.Name}}\t{{.Node}}'

• We will get an output like below

ID                  NAME                      NODE
oc8eczare6wv        reddit-demo_app.1         manager
u3mz2zgn085a         \_ reddit-demo_app.1     worker2
afdgmos1hbyh         \_ reddit-demo_app.1     worker1
tou3u1t26vk5        reddit-demo_micro.1       manager
wo142yj90hbs         \_ reddit-demo_micro.1   worker1
feuc5ymz3jn7         \_ reddit-demo_micro.1   worker1
fstbz8kthp5l        reddit-demo_mongodb.1     worker3
951docut0zav        reddit-demo_redisdb.1     manager

API

• Open Postman
• Import the RedditDemo.postman_collection.json

API Documentation

• API Documentation will be available at the below url using Swagger

  • http://localhost:3000/documentation

• Otherwise API description is also available in the postman collection.

To Be Worked on Usage of private registry.

sudo docker pull registry:2

sudo docker run -d -p 5000:5000 --restart=always --name registry registry:2

sudo docker ps