Connect to dockerized MySql with Springboot App - Communications link failure - mysql

Question

In my production environment with this command I run my docker-compose:
docker-compose -f docker-compose.yml up -d
DOCKER-COMPOSE
version: "3.3"
services:
db:
image: mysql
platform: linux/amd64
restart: always
container_name: mysql-db-users
environment:
MYSQL_ROOT_PASSWORD: 'password'
MYSQL_DATABASE: 'userDb'
ports:
- "3306:3306"
phpmyadmin:
image: phpmyadmin
restart: always
container_name: php-my-admin-users
ports:
- "8081:80"
Now by connecting to 172.22.14.43:8081 I can login to phpmyadmin when I can find that userDb has been created.
The next step is to connect a dockerized Springboot app to this userDb, but I continue to obtain:
com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure
This is the dockerfile of my SprigBoot App:
DOCKERFILE
FROM openjdk:17-jdk
ARG JAR_FILE=target/*.jar
COPY target/ldap-conn-*.jar /ldap-conn.jar
ENTRYPOINT ["java", "-jar", "/ldap-conn.jar" ]
EXPOSE 8090
APPLICATION.YML
server:
port: '8090'
spring:
application:
name: ldap-connection
datasource:
username: 'root'
password: 'password'
platform: 'mysql'
url: jdbc:mysql://mysql-db-users:3006/userDb?useSSL=false&allowPublicKeyRetrieval=true
sql:
init:
mode: always
jpa:
defer-datasource-initialization: 'true'
hibernate:
ddl-auto: update
properties:
hibernate:
data: classpath:Data.sql
dialect: org.hibernate.dialect.MySQL5InnoDBDialect
format_sql: true
show-sql: true
eureka:
client:
service-url:
defaultZone: http://172.17.0.2:8761/eureka
fetch-registry: true
register-with-eureka: true
And in my POM.XML I have both these dependencies:
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
I run my image in this way:
docker run -d -p 8090:8090 --name ldap myRepo/ldap1.0:ldap
I think the main issue is this line:
url: jdbc:mysql://mysql-db-users:3006/userDb?useSSL=false&allowPublicKeyRetrieval=true
As far as I understand using the container name is the way to go, but it doesn't seem to work.
I've tried by using the ip address of the docker container (with Eureka server is working)
jdbc:mysql://172.17.0.2:3006/userDb
the server ip
jdbc:mysql://serverIp:3006/userDb
but this is not working.