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Spring Boot MariaDB Docker Connection

I'm stuck with SQLNonTransientConnectionException in Spring Boot application with MariaDB database using docker.
Docker-compose.yaml
version: '3.1'
services:
stats-server:
container_name: stats-server
build:
dockerfile: Dockerfile-statsserver
context: ./stats-server
ports:
- "9090:9090"
depends_on:
- stats-db
stats-db:
container_name: stats-db
image: mariadb
ports:
- "9091:3306"
environment:
- MARIADB_ROOT_PASSWORD=root
- MARIADB_DATABASE=stats
- MARIADB_USER=stats_user
- MARIADB_PASSWORD=stats_password
application.properties
#port
server.port=9090
#MariaDB
spring.datasource.driver-class-name=org.mariadb.jdbc.Driver
spring.datasource.url=jdbc:mariadb://stats-db:9091/stats
spring.datasource.username=stats_user
spring.datasource.password=stats_password
spring.jpa.hibernate.ddl-auto=update
After docker-compose up command I've got the SQLNonTransientConnectionException error:
java.sql.SQLNonTransientConnectionException: Socket fail to connect to host:address=(host=stats-db)(port=9091)(type=primary). Connection refused
Database container runs well.
With Intellij Idea I can connect by this url:
jdbc:mariadb://localhost:9091/stats

my bad, should been use internal container port
spring.datasource.url=jdbc:mariadb://stats-db:3306/stats

Docker Compose Failed to configure a DataSource in Spring Boot Microservices

I have a problem about defining database in some services in my Spring Boot Microservice example.
When I run docker-compose.yml file through this command (docker-compose up -d), I have a datasource issue in user service, advertisement service and lastly report service.
All these services have their own database defined in their own properties file under configuration folder of config server.
Here is the database part of docker-compose.yml
database:
container_name: mysql-database
image: 'mysql:latest'
ports:
- "3366:3306"
restart: always
environment:
MYSQL_DATABASE: "springbootuser"
MYSQL_USER: "springmicroserviceuser"
MYSQL_PASSWORD: "111111"
MYSQL_ROOT_PASSWORD: "111111"
volumes:
- db-data:/var/lib/mysql
networks:
backend:
aliases:
- "database"
healthcheck:
test: ["CMD", "mysqladmin" ,"ping", "-h", "localhost"]
timeout: 20s
retries: 10
How can I fix the datasource issue in all services defined in docker-compose file
Here is my docker-compose.yml : Link
Here is the user service properties file : Link
Here is the advertisement service properties file : Link
Here is the report service properties file : Link
Edited 1st :
Here is my new docker-compose.yml : Link

Here is the problem with your datasource connection port localhost:3306.
user 3366 instead of 3306.
when you define internal port on same docker network you need to use database hostname instead of localhost.
if you use localhost or IP then you need to use docker to expose a port for database connections that route from the external network.
if needed update docker compose database section:
ports:
- "3366:3306"
expose:
- "3366"

Java app can't connect to rabbitMQ from the same docker container

I have a sample Spring Boot app that produce message:
#Scheduled(fixedRate = 10000)
public void test() throws Exception {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
try (Connection connection = factory.newConnection();
Channel channel = connection.createChannel()) {
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
String message = "Hello Rabbit!";
channel.basicPublish("", QUEUE_NAME, null, message.getBytes(StandardCharsets.UTF_8));
System.out.println(" [x] Sent '" + message + "'");
}
}
It is dockerized:
FROM openjdk:11 as jdkbase
FROM jdkbase
COPY target/RabbitMQtester-0.0.1-SNAPSHOT.jar /run/RabbitMQtester-0.0.1-SNAPSHOT.jar
#ADD target/sfida-1.0.0.jar /run/sfida-1.0.0.jar
ENTRYPOINT java -Dfile.encoding=UTF-8 -jar /run/RabbitMQtester-0.0.1-SNAPSHOT.jar
I need to build an image containing both RabbitMQ and my app. Here is docker-compose.yml for this task:
version: "3.7"
services:
mytestapp:
build: .
rabbitmq:
image: rabbitmq:3.8.3-management-alpine
hostname: localhost
environment:
RABBITMQ_DEFAULT_USER: guest
RABBITMQ_DEFAULT_PASS: guest
ports:
- 5672:5672
- 15672:15672
When i start the resulting image, i can access rabbitMQ admin page from my host. Also, i can run my app from the host and it'll access rabbitMQ.
But my app, which is in the container/image, can't access RabbitMQ (it throws "Connection refused (Connection refused)" errors)
What is wrong with my configurations?
UPD: I've also tried to change docker-compose.yml to this (and connection in my app to factory.setHost("rabbitmq"); )
version: "3.8"
services:
mytestapp:
build: .
networks:
- some-net
rabbitmq:
image: rabbitmq:3.8.3-management-alpine
hostname: rabbitmq
networks:
- some-net
environment:
RABBITMQ_DEFAULT_USER: guest
RABBITMQ_DEFAULT_PASS: guest
ports:
- 5672:5672
- 15672:15672
networks:
some-net:
driver: bridge
and to this:
version: "3.8"
services:
mytestapp:
build: .
rabbitmq:
image: rabbitmq:3.8.3-management-alpine
hostname: rabbitmq
environment:
RABBITMQ_DEFAULT_USER: guest
RABBITMQ_DEFAULT_PASS: guest
ports:
- 5672:5672
- 15672:15672
but result is the same...

The RabbitMQ service is by default accessible using the name of the docker service rabbitmq (when you remove hostname: localhost) from other services in the same stack (provided they are configured with the same network, in this case the default). So you should replace factory.setHost("localhost"); with factory.setHost("rabbitmq"); and remove hostname: localhost.
You did specify hostname: localhost, so one could assume RabbitMQ can be accessed using localhost hostname from the mytestapp service, but since it's not working it's very likely conflicting with the default loopback and resolving to 127.0.0.1 instead.

How to make Spring boot with Redis Sentinel work with Docker

I am trying to set up a Spring boot application with Redis Sentinel 3.2.11 using docker. However I am getting
Caused by: io.netty.channel.ConnectTimeoutException: connection timed out: /172.27.0.2:6379
My docker compose configuration
version: '3.1'
services:
master:
image: redis:3
container_name: redis-master
hostname: host_dev
networks:
- docker_dev
slave:
image: redis:3
command: redis-server --slaveof redis-master 6379
hostname: host_dev
links:
- master:redis-master
container_name: redis-slave
networks:
- docker_dev
sentinel:
build: sentinel
environment:
- SENTINEL_DOWN_AFTER=5000
- SENTINEL_FAILOVER=5000
- MASTER_NAME=mymaster
hostname: host_dev
image: sentinel:3
links:
- master:redis-master
- slave
container_name: sentinel
ports:
- "26379:26379"
networks:
- docker_dev
networks:
docker_dev:
Docker file
FROM redis:3
EXPOSE 26379
ADD sentinel.conf /etc/redis/sentinel.conf
RUN chown redis:redis /etc/redis/sentinel.conf
ENV SENTINEL_QUORUM 2
ENV SENTINEL_DOWN_AFTER 30000
ENV SENTINEL_FAILOVER 180000
COPY sentinel-entrypoint.sh /usr/local/bin/
RUN chmod +x /usr/local/bin/sentinel-entrypoint.sh
ENTRYPOINT ["sentinel-entrypoint.sh"]
Spring configuration in application.properties:
redis.cluster.name=mymaster
redis.sentinel.nodes=localhost:26379
redis.timeout=2000
Issue:
The spring boot app(run from outside docker-machine) is able to connect with Sentinel node. The sentinel node provides the master information with IP 172.27.0.2 i.e docker n/w IP. The spring boot app tries to connect with redis-master at IP 172.27.0.2 and fails as the IP is not visible outside the docker machine.
Possible fix:
How can I make sentinel node provide an master IP as localhost instead of internal docker-machine n/w ip?

Issue linking containers in Docker using Docker-compose

I'm using Docker to get my micro services architecture ready.
I'm facing some problem trying to link one container with another using docker-compose.
Basically I have a container for a postgressql image, and the a java micro service developed with spring boot that should connect to the database container.
So I'm setting a link in docker-compose.yml and referencing the db container ip as 'db' using :
- "JAVA_OPTS=-Dpostgres.host=db"
However I'm getting the following error starting the microservice with docker:
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'postgress.host' in value "jdbc:postgresql://${postgress.host}:5432/docker"
So basically this placeholder cannot be resolved, but normally docker-composed should take care of setting this system variable to point to the db container IP address right?
What I'm doing wrong?
Below the files involved:
docker-compose.yml:
version: "2"
services:
microservices:
build: ./microservices
container_name: microservices
links:
- db
- consul
environment:
- "JAVA_OPTS=-Dpostgres.host=db"
consul:
image: consul
container_name: consul
ports:
- "8500:8500"
db:
image: postgres
container_name: local-postgres9.6
ports:
- "5432:5432"
environment:
POSTGRES_PASSWORD: docker
POSTGRES_USER: docker
application.yml of the microservice:
server:
port: 8081
project:
jdbc:
url: jdbc:postgresql://${postgres.host}:5432/docker
driver: org.postgresql.Driver
username: docker
password: docker

Try ${db.host}, according to the documentation:
Containers for the linked service will be reachable at a hostname
identical to the alias, or the service name if no alias was specified.