Connect Redis with Node app

I wanted to use an in memory key value pair storage for my personal project since I never got to use one at work. I chose Redis just because it's a long established and well supported service.

So I have Redis hosted on a remote ubuntu server.

There's some configuration that we have to modify. Follow this tutorial to properly configure Redis so it can accept connections.

In order to connect my Node app to the remote Redis instance, we need to install redis and redis-om packages in our Node app.
First, define the connection URL

require("dotenv").config();

const URL = `redis://${process.env.REDIS_HOST}:${process.env.REDIS_PORT}`;

REDIS_HOST : the public IP address of the server.
REDIS_PORT : the Port that Redis was exposed to on the server, by default it's 6379. In my case, the Redis host is the public IP of the EC2 instance. But in order to open port 6379 of my remote ubuntu server, I have to add an inbound rule on the AWS dashboard. Click here to see how I did it.

//index.js

const init = async () => {
  const redisClient = require("redis").createClient({
    url: URL,
  });
  await redisClient.on("error", (err) =>
    console.log("Redis Client Error", err)
  );

  await redisClient.connect();
  if (redisClient.isReady) {
    console.log("client is ready");
  }
  await redisClient.set("key", "testvalue");
  const value = await redisClient.get("key");
  console.log("value is", value);
  await redisClient.disconnect();
};

init();

If you're like me and you don't have a password enabled for your redis, you will probably see something like this

[ErrorReply: DENIED Redis is running in protected mode because protected mode is enabled and no password is set for the default user. In this mode connections are only accepted from the loopback interface. If you want to connect from external computers to Redis you may adopt one of the following solutions: 1) Just disable protected mode sending the command 'CONFIG SET protected-mode no' from the loopback interface by connecting to Redis from the same host the server is running, however MAKE SURE Redis is not publicly accessible from internet if you do so. Use CONFIG REWRITE to make this change permanent. 2) Alternatively you can just disable the protected mode by editing the Redis configuration file, and setting the protected mode option to 'no', and then restarting the server. 3) If you started the server manually just for testing, restart it with the '--protected-mode no' option. 4) Setup a an authentication password for the default user. NOTE: You only need to do one of the above things in order for the server to start accepting connections from the outside.]

Follow one of the suggested solutions mentioned above then rerun the redis server.