Error database connect is not a function Nodejs with Mysql in docker - mysql

Question

I have deployed my docker application (to DigitalOcean). Everything work's, but I can't connect mysql with nodejs.
When I run docker-compose up I get error database.connect is not a function.
My server.js file is look like this
const mysql = require("mysql");
const database = mysql.createPool({
host: process.env.MYSQL_HOST_IP,
user: "db_user",
password: "db_user_pass",
database: "guess-game",
port: 3306,
});
database.connect((err) => {
if (err) {
console.error("error connecting: " + err.stack);
return;
}
console.log("connected as id " + db.threadId);
});
module.exports = db;
I don't know what I need to write this line to make it work.
host: process.env.MYSQL_HOST_IP,
I tried to add droplet IP as host, but this is also don't work.
host: "http://46.101.162.111/",
Also, I try this.
host: "46.101.162.111",
My docker-compose.yml file
version: "3"
networks:
dbnet:
services:
phpmyadmin:
image: phpmyadmin/phpmyadmin
container_name: phpmyadmin1
environment:
- PMA_ARBITRARY=1
- PMA_HOST=db
restart: always
links:
- db
ports:
- 8899:80
depends_on:
- db
networks:
- dbnet
api:
build: ./api
container_name: api1
command: npm run start
restart: unless-stopped
ports:
- "3005:3005"
environment:
- PORT=3005
- MYSQL_HOST_IP=172.18.0.2
depends_on:
- phpmyadmin
networks:
- dbnet
db:
image: mysql:latest
container_name: db
command: --default-authentication-plugin=mysql_native_password
environment:
- MYSQL_ROOT_PASSWORD=my_secret_password
- MYSQL_DATABASE=guess-game
- MYSQL_USER=db_user
- MYSQL_PASSWORD=db_user_pass
restart: always
ports:
- 6033:3306
networks:
- dbnet
Struggling almost 3 days. 😣

Answer 1

You just need to indicate a DB container name instead of IP like this:
MYSQL_HOST_IP=db