Connect NodeJS with Redis Cluster (Password protected)

NodeJs + Redis

What is Redis?

Redis (REmote DIctionary Server) is an open source, in-memory, NoSQL key/value store that is used primarily as an application cache or quick-response database.

Redis is often referred to as a data structures server. What this means is that Redis provides access to mutable data structures via a set of commands, which are sent using a server-client model with TCP sockets and a simple protocol. So different processes can query and modify the same data structures in a shared way.

Documentation Link: https://redis.io/docs/latest/

What is NodeJS?

Node.js is a free, open-source, cross-platform JavaScript runtime environment that lets developers create servers, web apps, command line tools and scripts.

Documentation: https://nodejs.org/docs/latest/api/

How to connect NodeJS with Redis Cluster?

First we need to install Redis Cluster server in local machine. Please refer redis official documentation mentioned below for more details.

Install Redis

Secondly we need to install NodeJs in local Machine. Please refer documentation mentioned below for more details.

Node.js - Download Node.js®

Please verify your installation using below mentioned command

NodeJS

Redis

Please refer below mention steps

STEP 1: Create a file named redis-cluster-connect.js

STEP 2: Download ioredis package

STEP 3: import redis dependency

const Redis = require("ioredis");

STEP 4: Now Connect with redis

const redis = new Redis.Cluster(
          [
              {
                host: <IP>,
                port: <PORT>
              }, {
                host: <IP>,
                port: <PORT>
              }, {
                host: '<IP>',
                port: '<PORT>'
              }
            ],{
            redisOptions: {
              password: '<PSWD>'
            }
          }
          );

you can pass multiple parameter. Please refer ioredis documentation

ioredis

Now we can add data to redis. for example

redis.set("mykey", "value");

// Or ioredis returns a promise if the last argument isn't a function
redis.get("mykey").then((result) => {
  console.log(result); // Prints "value"
});

// we can use async / await as well
await redis.get("mykey");

Conclusion

Now we have learned to connect nodeJS with redis cluster. Thanks for reading :)

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