connect-redis redisClient.connect() connecting to wrong IP - node.js

Question

I am getting the following error message.
app | Redis error: Error: connect ECONNREFUSED 127.0.0.1:6379
app | at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1159:16) {
app | errno: -111,
app | code: 'ECONNREFUSED',
app | syscall: 'connect',
app | address: '127.0.0.1',
app | port: 6379
app | }
It is connecting to 127.0.0.1, even though I have hard-coded the ip address as 172.19.0.3. I'm not sure if it makes a difference, but the app, and redis db are both in docker containers. I have supplied the external IP for the redis container.
// Session / Redis
const session = require('express-session');
const redisStore = require('connect-redis')(session);
// redis#v4
const { createClient } = require("redis")
const redisClient = createClient({
legacyMode: true,
host: '172.19.0.3'
});
redisClient.connect()
.catch(console.error)
.then(() => {
console.log('Connected to Redis server successfully');
});
app.use(
session({
secret: process.env.SESSION_SECRET,
name: '_redisSessionId',
resave: false,
saveUnitialized: true,
cookie: {
path: '/',
httpOnly: true,
secure: false,
maxAge: 60000 // 30 minutes
},
store: new redisStore({
host: '172.19.0.3', //process.env.REDIS_HOST,
port: 6379,
client: redisClient,
ttl: 86400
})
}))
Any help is greatly appreciated.

Answer 1

According to the documentation your createClient options should look like:
{
url: 'redis://172.19.0.3',
legacyMode: true,
}
and creating the connect-redis store should look like:
new redisStore({ client: redisClient });