ECONNREFUSED 127.0.0.1:5432 - node.js

Question

I am a beginner in node, nest, and docker but somehow I got assigned a job to dockerized all the existing node js applications.
I followed one of the youtube tutorial and successfully deployed the basic hello world via docker but in the next youtube tutorial when I am trying to add Postgres to the docker I am facing some issues in connecting to Postgres.
I am using docker desktop on mac.
Here is my docker-compose.yml file code snippet
version: "3.9" # optional since v1.27.0
services:
api:
build:
dockerfile: Dockerfile
context: .
depends_on:
- postgres
environment:
DATABASE_URL: postgres://user:password#postgres:5432/db
NODE_ENV: developement
PORT: 3000
ports:
- "8080:3000"
postgres:
image: postgres:14.0
ports:
- "35000:5432"
environment:
POSTGRES_USER: user
POSTGRES_PASSWORD: password
POSTGRES_DB: db
Here is the entire error log
Github Repository of this project
Thank you for helping in advance :)

Answer 1

Your problem for a typo in DATABASE_URL. In code for connect database use DATABSE_URL word but in docker-compose used DATABASE_URL.
You should change url: process.env.DATABSE_URL to url: process.env.DATABASE_URL

Answer 2

Make sure your connection string is correct in your docker-compose.yml. Just pass the host, port, user and pass seperated and let TypeOrm handle the connection.
// app.module.ts
TypeOrmModule.forRoot({
type: 'postgres',
host: process.env.POSTGRES_HOST,
port: process.env.POSTGRES_PORT,
username: process.env.POSTGRES_USER,
password: process.env.POSTGRES_PASSWORD,
database: process.env.POSTGRES_DB,
})
And your docker-compose.yml:
# docker-compose.yml
version: '3.9'
services:
api:
build:
dockerfile: Dockerfile
context: .
depends_on:
- postgres
environment:
- POSTGRES_HOST=postgres
- POSTGRES_PASSWORD=promo-pass
- POSTGRES_USER=promo-user
- POSTGRES_DB=promo-api-db
- POSTGRES_PORT=5432
postgres:
container_name: postgres
image: postgres
environment:
POSTGRES_USER: promo-user
POSTGRES_PASSWORD: promo-pass
POSTGRES_DB: promo-api-db

Answer 3

In the normal case, without Docker, i. e. you are using node and postgresql on you development or production machine, you just want to start postgres service and enable it if you want.
In order to start your postgres service, type the following command:
sudo systemctl start postgresql
To enable :
sudo systemctl enable postgresql
Note:
"Enable" means enbable the postgres server at boot time.
In my environment, i am using Red Hat. So if commands doesn't work, find the corresponding command on your linux distribution or on your specific OS.
I hope this can help someone else!