I am trying to connect From Node.js on Localhost to MySQL instance running on docker using docker-compose.
Node.js gives me this error: ENOTFOUND db, Full error message bellow.
[nodemon] restarting due to changes...
[nodemon] starting `node app.js`
Application Name: RESTFull API - Development
Environment: development
Server is listening on port 3000
getaddrinfo ENOTFOUND db # <------------ Error here
[nodemon] app crashed - waiting for file changes before starting...
Here is docker-compose.yml that contains MySQL and adminer services.
## docker-compose.yml
version: '3.8'
services:
db:
image: mysql
restart: always
environment:
MYSQL_ROOT_PASSWORD: root
MYSQL_DATABASE: 'nodejs-restfull-api-development'
expose:
- 3306
volumes:
- db-config:/etc/mysql
- db-data:/var/lib/mysql
adminer:
image: adminer:latest
depends_on:
- db
environment:
ADMINER_DEFAULT_DB_DRIVER: mysql
ADMINER_DEFAULT_DB_HOST: db
ADMINER_DESIGN: nette
ADMINER_PLUGINS: tables-filter tinymce
ports:
- "8080:8080"
volumes:
db-config:
db-data:
Here is my node.js database connection config.
const database = mysql.createConnection({
host: 'db',
user: config.get('db.user'),
password: config.get('db.password'),
database: config.get('db.database'),
port: config.get('db.port'),
connectTimeout: config.get('db.connectTimeout')
});
database.connect(err => {
if (err) {
console.log(err.message);
process.exit(1);
} else {
console.log('Connected to database');
}
});
You don't tell us, but I assume your Node app is running on the host and not in a container? If that's the case, then you need to expose the MySQL port to the host, so it's reachable. You also need to use localhost as the hostname in your configuration.
Expose the port by changing the database part of your docker-compose file to
db:
image: mysql
restart: always
environment:
MYSQL_ROOT_PASSWORD: root
MYSQL_DATABASE: 'nodejs-restfull-api-development'
ports:
- 3306:3306
volumes:
- db-config:/etc/mysql
- db-data:/var/lib/mysql
And change your Node configuration to
const database = mysql.createConnection({
host: 'localhost',
user: config.get('db.user'),
password: config.get('db.password'),
database: config.get('db.database'),
port: config.get('db.port'),
connectTimeout: config.get('db.connectTimeout')
});