How to use Redis pub/sub to handle socket.io sessions across multiple instances ?

• redis-socket-blog

  1 1 10.0 Go

Before going into the solution of the problem, let’s understand the technologies i have used along with some snippet of the actual code. I have written the server code in golang and i am using Postman as client. The two technologies i would like to brief you all are socket.io and Redis pub/sub. If you are already familiar with the concepts just glance through my description to better understand the blog and solution provided by it.

• go-socket.io

  3 5,558 4.5 Go

  socket.io library for golang, a realtime application framework.

Socket.io helps in delivering messages to client in real time. Behind the scene socket.io creates a bi-directional channel between server and client therefore enabling bidirectional communication between web client and server. For demo code I have used a golang server therefor i have used a golang library called go-socket.io . Some advance socket.io concepts which you should be aware are channel, event, namespace and rooms.

• WorkOS

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• Newman

  241 6,712 7.7 JavaScript

  Newman is a command-line collection runner for Postman

  

Before going into the solution of the problem, let’s understand the technologies i have used along with some snippet of the actual code. I have written the server code in golang and i am using Postman as client. The two technologies i would like to brief you all are socket.io and Redis pub/sub. If you are already familiar with the concepts just glance through my description to better understand the blog and solution provided by it.

• Socket.io

  825 60,085 7.8 TypeScript

  Realtime application framework (Node.JS server)

  

Before going into the solution of the problem, let’s understand the technologies i have used along with some snippet of the actual code. I have written the server code in golang and i am using Postman as client. The two technologies i would like to brief you all are socket.io and Redis pub/sub. If you are already familiar with the concepts just glance through my description to better understand the blog and solution provided by it.

• Redis

  318 64,705 9.7 C

  Redis is an in-memory database that persists on disk. The data model is key-value, but many different kind of values are supported: Strings, Lists, Sets, Sorted Sets, Hashes, Streams, HyperLogLogs, Bitmaps.

  

First of all let’s understand Redis. It is an in-memory data structure store which is used as a database, cache, message broker, and streaming engine. Redis pub/sub is one the features of Redis. You can get official documentation of Redis pub/sub here . Let me give you a brief on few of the concepts of Redis pub/sub. There are two components in Redis pub/sub first one is Publisher. Its function is to send message payload to a given channel/Topic. Subscribers, these subscribe/unsubscribe to a particular topic. A message sent to a topic by a publisher is received by all subscribers subscribed to that topic. Given figure explains the principle of Redis pub/sub.

• InfluxDB

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