Mongodb + SpringBoot REST API + Docker Compose not working - mongodb

Question

I'm trying to use docker-compose to run my Springboot REST API, which uses Mongo as a database, but I'm receiving the following error. Could someone please assist me in resolving this?
When my spring-boot application tries to connect to MongoDB via the Docker container, it gives me problems. Spring-boot appears to be unable to connect to MongoDB on port 27017.
Below is the part of the code and exception.
DockerFile
FROM adoptopenjdk/openjdk11:alpine-jre
ARG JAR_FILE=target/*.jar
COPY ${JAR_FILE} app.jar
EXPOSE 8080
ENTRYPOINT ["java","-jar","/app.jar"]
Docker-Compose.yml
version: '3.8'
services:
sprintpoker-springboot-container:
image: sprintpoker-springboot
build:
context: ./
dockerfile: Dockerfile
volumes:
- /data/sprintpoker-springboot-container
ports:
- 8080:8080
depends_on:
- mongo
mongo:
image: mongo
container_name: mongodb
ports:
- 27017:27017
volumes:
- data:/data
environment:
MONGO_INITDB_ROOT_USERNAME: rootuser
MONGO_INITDB_ROOT_PASSWORD: rootpass
mongo-express:
image: mongo-express
restart: always
ports:
- 8081:8081
environment:
ME_CONFIG_MONGODB_ADMINUSERNAME: rootuser
ME_CONFIG_MONGODB_ADMINPASSWORD: rootpass
ME_CONFIG_MONGODB_SERVER: mongo
volumes:
data: {}
networks:
default:
name: mongodb_network
Command I am use to run docker:
docker-compose up -d --build --force-recreate --renew-anon-volumes
Exception on spring-boot docker container:
2021-08-16 03:16:02.453 INFO 1 --- [ main] org.mongodb.driver.cluster : Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms'}
2021-08-16 03:16:02.545 INFO 1 --- [localhost:27017] org.mongodb.driver.cluster : Exception in monitor thread while connecting to server localhost:27017
com.mongodb.MongoSocketOpenException: Exception opening socket
at com.mongodb.internal.connection.SocketStream.open(SocketStream.java:70) ~[mongodb-driver-core-4.2.3.jar!/:na]
at com.mongodb.internal.connection.InternalStreamConnection.open(InternalStreamConnection.java:143) ~[mongodb-driver-core-4.2.3.jar!/:na]
at com.mongodb.internal.connection.DefaultServerMonitor$ServerMonitorRunnable.lookupServerDescription(DefaultServerMonitor.java:188) ~[mongodb-driver-core-4.2.3.jar!/:na]
at com.mongodb.internal.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:144) ~[mongodb-driver-core-4.2.3.jar!/:na]
at java.base/java.lang.Thread.run(Unknown Source) ~[na:na]
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.base/java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:na]
at java.base/java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) ~[na:na]
at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) ~[na:na]
at java.base/java.net.AbstractPlainSocketImpl.connect(Unknown Source) ~[na:na]
at java.base/java.net.SocksSocketImpl.connect(Unknown Source) ~[na:na]
at java.base/java.net.Socket.connect(Unknown Source) ~[na:na]
at com.mongodb.internal.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:107) ~[mongodb-driver-core-4.2.3.jar!/:na]
at com.mongodb.internal.connection.SocketStream.initializeSocket(SocketStream.java:79) ~[mongodb-driver-core-4.2.3.jar!/:na]
at com.mongodb.internal.connection.SocketStream.open(SocketStream.java:65) ~[mongodb-driver-core-4.2.3.jar!/:na]
... 4 common frames omitted
application.properties
spring.data.mongodb.authentication-database=admin
spring.data.mongodb.username=rootuser
spring.data.mongodb.password=rootpass
spring.data.mongodb.database=sprint
spring.data.mongodb.port=27017
spring.data.mongodb.host=localhost
spring.data.mongodb.auto-index-creation=true
Thanks!

Answer 1

Your error is here
2021-08-16 03:16:02.545 INFO 1 --- [localhost:27017] org.mongodb.driver.cluster : Exception in monitor thread while connecting to server localhost:27017
The Spring app container isn't running anything on port 27017, let alone a MongoDB server.
Change
spring.data.mongodb.host=localhost
to
spring.data.mongodb.host=mongo

Answer 2

I am able to resolve the issue Thanks to #OneCricketeer and #Michał Krzywański (Mongodb connection error though docker in springboot).
Solution:
Added below line in docker-compose file:
environment:
- SPRING_DATA_MONGODB_.HOST=mongo
expose:
- 27017

Answer 3

Application.yaml / properties file
spring:
data:
mongodb:
database: test
host: mymongodb
port: 27017
spring.data.mongodb.port=27017
spring.data.mongodb.host=<mongo-image-name>
spring.data.mongodb.database=<any-database-name>
Create mongo image :-
docker pull mongo:latest
Stop Local Mongo Service as it runs on the same port
Run docker image :-
docker run -d -p 27017:27017 --name mymongodb mongo:latest --mymongodb
is the container name and will be the host name in yaml or properties
file
DockerFile Example :-
FROM openjdk:11
ADD target/springboot-mongo-docker.jar app.jar
EXPOSE 8080
ENTRYPOINT ["java","-jar","app.jar"]
Build the jar :- mvn clean install
Build Docker Image :- docker build -t springboot-mongodb:1.0 .
Run The Linked Container as follows :-
docker run -p 8080:8080 --name springboot-mongodb --link
mymongodb:mongo -d springboot-mongodb:1.0
docker-compose.yml :-
docker-compose up
> version: "3"
services: mymongodb:
> image: mongo:latest
> container_name: "mymongodb"
> ports:
> - 27017:27017 springboot-mongodb:
> image: springboot-mongodb:1.0
> container_name: springboot-mongodb
> ports:
> - 8080:8080
> links:
> - mymongodb