Docker Nodejs Redis connection to 127.0.0.1:6379 failed

user_7800612 0
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I want to use Redis with my express server in docker. I am using docker-compose to build my app with Redis. Here is my code for Dockerfile

FROM node:12-alpine
WORKDIR '/var/www/app'

Here is the code for the docker-compose.yml file:

redis:
  image: redis
  container_name: cache
  expose:
    - 6379
app:
  build: ./
  volumes:
    - ./:/var/www/app
  links:
    - redis
  ports:
    - 7000:7000
  environment:
    - REDIS_URL = redis
    - NODE_ENV=development
    - PORT=7000
  command:
    sh -c 'npm i && node server.js'

I am not able to debug why it is refusing to connect even if I expose port 6379 in the docker-compose.yml file. Here is my code for the server.js file

const express = require("express");
const app = express();
const redis =require("redis")

let client=redis.createClient(process.env.REDIS_URL)

client.on('connect',()=>{
  console.log("redis connected")
});

client.on("error", function (err) {
  console.log("Error " + err);
});

var port = process.env.PORT || 7000;

app.listen(port, () => {
  console.log(`Server is listening in port: ${port}`);
});

I have used the below commands to build the app.

sudo docker-compose up --build

Any guidance would be helpful. Thanks

docker-compose docker redis node.js
2 Answers

It has been solved by just removing the spaces in-between and changed the first line after the environment to REDIS_URL=redis://cache Thanks to @ozlevka

user_78006120 
redis:
  image: redis
  container_name: cache
  ports:
    - 6379:6379
app:
  build: ./
  volumes:
    - ./:/var/www/app
  ports:
    - 7000:7000
  environment:
    - REDIS_URL=localhost
    - NODE_ENV=development
    - PORT=7000
  command:
    sh -c 'npm i && node server.js'

I have added ports to redis and removed links. Please try this and update.

user_37602160
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