version: "3.7"
services:
api_service:
build: .
restart: always
ports:
- 8080:8080
depends_on:
- postgres_db
links:
- postgres_db:database
postgres_db:
image: "postgres:11.4"
restart: always
ports:
- 5435:5432
environment:
POSTGRES_DB: testDb
POSTGRES_PASSWORD: admin
this is my YAML file.
and I got properties
spring.datasource.platform=postgres
spring.datasource.url=jdbc:postgresql://database:5432/testDb
spring.datasource.username=postgres
spring.datasource.password=admin
if my Postgres is rds then do I need to compose them or I just can go with Dockerfile for jar only and not YAML file?
You can create environment variables for the RDS address, RDS username, RDS password and RDS port. Pass it to the Dockerfile to the api_service. Your api_service should know to assemble Postgres connection string based on the environment variables. Please check - Spring Profiles in connection String
Those Spring properties values are probably incorrect in most of the environments in which you might run your application. In your unit-test environment the database might be H2 or HDBC instead of PostgreSQL; in a local-developer setup it will be on localhost; in RDS it will be a different name again. These host names and credentials should not be in your src/main/resources tree anywhere.
Spring allows you to set Spring properties using environment variables. So you can set e.g. spring.datasource.url at the point where you deploy your application. In your Compose setup, for example:
version: "3.8"
services:
api_service:
build: .
restart: always
ports:
- 8080:8080
depends_on:
- postgres_db
environment:
- SPRING_DATASOURCE_URL=jdbc:postgresql://postgres_db:5432/testDb
- SPRING_DATASOURCE_USERNAME=postgres
- SPRING_DATASOURCE_PASSWORD=admin
postgres_db:
image: "postgres:11.4"
restart: always
ports:
- 5435:5432
environment:
POSTGRES_DB: testDb
POSTGRES_PASSWORD: admin
If your production environment uses RDS, then it should be enough to remove the postgres_db container and change the SPRING_DATASOURCE_* environment variables to match the RDS host name and credentials. You don't have to recompile anything or change the contents of your jar file.
Related
When i start application in IDE, it works correctly, but when i use docker-compose for starting my project, something goes wrong and my application container restarts, i have shared my project on github https://github.com/MatveyAndrosyukk/sweater , maybe somebody can help.
dockerfile:
FROM adoptopenjdk/openjdk15
VOLUME /main-app
ADD target/sweater-0.0.1-SNAPSHOT.jar app.jar
EXPOSE 8080
ENTRYPOINT ["java", "-jar","/app.jar"]
docker-compose.yml:
version: "3.7"
services:
api_service:
build: .
restart: always
ports:
- 8080:8080
depends_on:
- mysql_db
links:
- mysql_db:sweater_db
mysql_db:
image: "mysql:8.0"
restart: always
ports:
- 3307:3306
environment:
MYSQL_DATABASE: sweater_db
MYSQL_USER: user228
MYSQL_PASSWORD: user228
MYSQL_ROOT_PASSWORD: 13574637480326
application.properties:
#DB properties------------
spring.datasource.url=jdbc:mysql://localhost:3306/sweater_db?useSSL=false
spring.datasource.username=user228
spring.datasource.password=user228
spring.jpa.show-sql=true
#hibernate will automatically create, update, validate database tables
spring.jpa.hibernate.ddl-auto=validate
spring.jpa.generate-ddl=true
#generate better SQL for the chosen database
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQLDialect
#-------------------------
#Logs properties----------
logging.level.org.hibernate.SQL=DEBUG
#-------------------------
#Mail properties----------
spring.mail.host=smtp.yandex.ru
spring.mail.username=matveyandrosyuk2002#yandex.ru
spring.mail.password=rjpyptztrbbivjec
spring.mail.port=465
spring.mail.protocol=smtps
mail.debug=true
#-------------------------
#Captcha properties-------
recaptcha.secret=6LcXGhEgAAAAAFUMjaB1kpj4NHzBHyAnCXcMPVhW
#-------------------------
#Image path properties----
upload.path=D:/Projects/Intellij IDEA/Web Applications/Spring/sweater/uploads
#-------------------------
#Spring Session properties
spring.session.jdbc.initialize-schema=always
spring.session.jdbc.table-name=SPRING_SESSION
#-------------------------
hostname=localhost:8080
Throws exception:
SQL State : 08S01
Error Code : 0
Message : Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:233) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveNamedBean(DefaultListableBeanFactory.java:1282) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveNamedBean(DefaultListableBeanFactory.java:1243) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveBean(DefaultListableBeanFactory.java:494) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:349) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:342) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.orm.jpa.EntityManagerFactoryUtils.findEntityManagerFactory(EntityManagerFactoryUtils.java:121) ~[spring-orm-5.3.18.jar!/:5.3.18]
at org.springframework.orm.jpa.JpaTransactionManager.setBeanFactory(JpaTransactionManager.java:333) ~[spring-orm-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeAwareMethods(AbstractAutowireCapableBeanFactory.java:1826) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1791) ~[spring-beans-5.3.18.jar!/:5.3.18]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.18.jar!/:5.3.18]
... 94 common frames omitted
Caused by: org.flywaydb.core.internal.exception.FlywaySqlException: Unable to obtain connection from database: Communications link failure
If you look at https://docs.docker.com/compose/networking/#links:
Links allow you to define extra aliases by which a service is reachable from another service. They are not required to enable services to communicate
However lets delete links and add hostname:
version: "3.7"
services:
api_service:
build: .
hostname: api_service
restart: always
ports:
- 8080:8080
depends_on:
- mysql_db
mysql_db:
image: "mysql:8.0"
hostname: mysql_db
restart: always
ports:
- 3307:3306
environment:
MYSQL_DATABASE: sweater_db
MYSQL_USER: user228
MYSQL_PASSWORD: user228
MYSQL_ROOT_PASSWORD: 13574637480326
The big problem is here: The "localhost" occurences in your application.properties refers to the api_service container localhost and not to your host machine localhost. So you can try:
spring.datasource.url=jdbc:mysql://mysqldb:3306/sweater_db?useSSL=false
you can also replace:
hostname=localhost:8080 by hostname=api_service:8080
Since both services created in the docker compose are created in the same network, you could ping each one with its hostname.
try it and come back please
I have two docker containers. One backend, and the other db (postgres). They both are linked. How do I utilise the backend environment HOST variable in the golang docker container?
From my understanding, both containers have their own IP addresses. I cannot use 'localhost' in the golang container because postgres isn't on localhost, but in an isolated container.
version: "3.7"
services:
backend:
image: golang:1.16
build: ./
working_dir: /app
volumes:
- ./backend/:/app
environment:
HOST: db
command: go run main.go
ports:
- 8080:8080
depends_on:
- db
db:
image: postgres
restart: always
environment:
POSTGRES_USER: gorm
POSTGRES_PASSWORD: gorm
POSTGRES_DB: gorm
ports:
- 9920:9920
I've tried researching how to access this variable as well as check Docker tutorials/documentation, but haven't found a solution.
Docker compose does DNS resolution. You should be able to access your database by name.
Remove:
environment:
HOST: db
Correct the postgres port to 5432:
db:
...
ports:
- 5432:5432
You must be able to connect like so:
db := pg.Connect(&pg.Options{
Addr: "db:5432",
User: "gorm",
Database: "gorm",
Password: "gorm",
})
As for environment variables, you can declare and access them like this:
backend:
environment:
POSTGRES_USER: gorm
...
os.Getenv("POSTGRES_USER")
Docker compose will create a network for your containers where they can communicate and reach each other.
You can make a simple change to your docker compose file by adding a name to your services which will make sure they get the same name each time.
version: "3.7"
services:
backend:
image: golang:1.16
build: ./
container_name: backend
working_dir: /app
volumes:
- ./backend/:/app
command: go run main.go
ports:
- "8080:8080"
depends_on:
- db
db:
image: postgres
restart: always
container_name: db
environment:
POSTGRES_USER: gorm
POSTGRES_PASSWORD: gorm
POSTGRES_DB: gorm
ports:
- "9920:5432"
The default port for Postgres is 5432, so I mapped it to your 9920. Then, you can access the db container from the backend container by specifying:
db:9920
I'm new to docker and started to play with it on my small project.
I have dockerized the service itself with the following Docker file:
ROM adoptopenjdk:11-jdk-hotspot AS DEPENDENCIES_BUILD_IMAGE
ENV APP_HOME=/usr/app/
WORKDIR $APP_HOME
COPY build.gradle settings.gradle gradlew $APP_HOME
COPY gradle $APP_HOME/gradle
RUN ./gradlew build || return 0
COPY . .
RUN ./gradlew build
FROM adoptopenjdk/openjdk11:jdk-11.0.7_10-alpine AS FINAL
ENV JAR_TEMPLATE=myapp-0.0.1-SNAPSHOT.jar
ENV ARTIFACT_NAME=myapp.jar
ENV APP_HOME=/usr/app
WORKDIR $APP_HOME
COPY --from=DEPENDENCIES_BUILD_IMAGE $APP_HOME/build/libs/$JAR_TEMPLATE .
RUN mv $JAR_TEMPLATE $ARTIFACT_NAME
EXPOSE 8080
CMD ["java", "-jar", "budget-calculator.jar"]
Side note - I know that there's a problem that I'm always copying 0.0.1-SNAPSHOT - but I'm not sure how to solve it at the moment.
After that I wanted to connect my service to a Postgres DB with docker-compose using this confirmation:
version: '3'
services:
backend:
build: .
container_name: myapp
ports:
- "8080:8080"
links:
- "db"
depends_on:
- db
networks:
- backend
db:
restart: unless-stopped
image: postgres:10
container_name: myapp-db
environment:
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=secret
- POSTGRES_DB=myapp
ports:
- 5436:5436
networks:
- backend
networks:
backend:
After that I've updated my application.properties file to indicate that the DB link is on the other container as follow:
spring.flyway.url=jdbc:postgresql://db:5436/myapp
spring.flyway.user=postgres
spring.flyway.password=secret
spring.flyway.baseline-on-migrate=true
spring.datasource.url=jdbc:postgresql://db:5436/myapp
spring.datasource.username=postgres
spring.datasource.password=secret
spring.datasource.driverClassName=org.postgresql.Driver
Now I had 2 problems:
While I assumed that build: . will rebuild my image every time
that I'm running docker-compose up if something changed in
practice I saw that it's not the case.
When the backend service starts flyway (a migration DB library) try
to connect to the database and cannot resolve the connection.
I've seen online that the usage of - links is deprecated and I should use the networks but both do not seem to work - what am I missing?
There are 2 problems with my configurations, the first one - the internal port of Postgres was configured as 5436 while the default port of the image is 5432 (I've updated both of them to 5432)
the second one, in order to pass the IP of the DB to the service I've added the following environment variables to the service image:
environment: # Pass environment variables to the service
SPRING_DATASOURCE_URL: jdbc:postgresql://db:5432/budget
SPRING_DATASOURCE_USERNAME: postgres
SPRING_DATASOURCE_PASSWORD: secret
SPRING_FLYWAY_URL: jdbc:postgresql://db:5432/budget
SPRING_FLYWAY_USER: postgres
SPRING_FLYWAY_PASSWORD: secret
So my current working configuration is this:
version: '3.8'
services:
backend:
build: .
container_name: app-service
ports:
- "8080:8080"
depends_on:
- db
environment: # Pass environment variables to the service
SPRING_DATASOURCE_URL: jdbc:postgresql://db:5432/myapp
SPRING_DATASOURCE_USERNAME: postgres
SPRING_DATASOURCE_PASSWORD: secret
SPRING_FLYWAY_URL: jdbc:postgresql://db:5432/myapp
SPRING_FLYWAY_USER: postgres
SPRING_FLYWAY_PASSWORD: secret
db:
restart: unless-stopped
image: postgres:10
environment:
- POSTGRES_DB=myapp
- POSTGRES_PASSWORD=postgres
- POSTGRES_USER=secret
volumes:
- myapp_data:/var/lib/postgresql/data
ports:
- 5432:5432
volumes:
myapp_data:
I am having a problem connecting my compiled Spring-Boot app to the database that I have running on another container on my server.
I have tried different configurations, changing from localhost to the IP address of my server for the connection. I also double checked that the credentials matched by logging in via Adminer. Finally, I did a rebuild of the compose and image files several times to ensure that I have all the latest versions.
Compose file:
version: '3.1'
services:
db:
image: mariadb
restart: always
environment:
MYSQL_ROOT_PASSWORD: mypassword
MYSQL_DATABASE: marketingappdb
ports:
- "3306:3306"
expose:
- 3306
volumes:
- ./mariadbvolume:/var/lib/mariadb
networks:
- marketingapp
adminer:
image: adminer
restart: always
ports:
- "8086:8080"
expose:
- 8086
depends_on:
- db
networks:
- marketingapp
springserver:
image: marketingapp
restart: always
ports:
- "8091:8091"
expose:
- 8091
depends_on:
- db
networks:
- marketingapp
networks:
marketingapp:
Spring Server Image:
FROM openjdk:latest
COPY /marketing-app-final.jar .
EXPOSE 8091
ENTRYPOINT ["java", "-jar", "marketing-app-final.jar"]
Application properties for Spring:
server.port = 8091
spring.datasource.url=jdbc:mariadb://0.0.0.0:3306/marketingappdb
spring.datasource.username=root
spring.datasource.password=mypassword
spring.datasource.driver-class-name=org.mariadb.jdbc.Driver
spring.jpa.hibernate.ddl-auto=update
I can connect from my PC to the database using the app from the remote same configuration (obviously replacing localhost with the IP) and don't see why I shouldn't be able to do the same from the actual server. Thanks in advance for any help!
Use the docker dns to connect your spring App to the mariabd:
jdbc:mariadb://db:3306/marketingappdb
Just a few other hints: you don't need to expose port 3306, you already bind it to 3306 on Host (if you just want to use it from within the docker Services you don't need to bind/expose it at all). And the mariabd persistent storage is var/lib/mysql and not var/lib/mariadb
I have a Java Spring Boot app which works with a Postgres database. I want to use Docker for both of them. I initially put just the Postgres in Docker, and I had a docker-compose.yml file defined like this:
version: '2'
services:
db:
container_name: sample_db
image: postgres:9.5
volumes:
- sample_db:/var/lib/postgresql/data
environment:
- POSTGRES_PASSWORD=sample
- POSTGRES_USER=sample
- POSTGRES_DB=sample
- PGDATA=/var/lib/postgresql/data/pgdata
ports:
- 5432:5432
volumes:
sample_db: {}
Then, when I issued the commands sudo dockerd and sudo docker-compose -f docker-compose.yml up, it was starting the database. I could connect using pgAdmin for example, by using localhost as server and port 5432. Then, in my Spring Boot app, inside the application.properties file I defined the following properties.
spring.datasource.url=jdbc:postgresql://localhost:5432/sample
spring.datasource.username=sample
spring.datasource.password=sample
spring.jpa.generate-ddl=true
At this point I could run my Spring Boot app locally through Spring Suite, and it all was working fine. Then, I wanted to also add my Spring Boot app as Docker image. I first of all created a Dockerfile in my project directory, which looks like this:
FROM java:8
EXPOSE 8080
ADD /target/manager.jar manager.jar
ENTRYPOINT ["java","-jar","manager.jar"]
Then, I entered to the directory of the project issued mvn clean followed by mvn install. Next, issued docker build -f Dockerfile -t manager . followed by docker tag 9c6b1e3f1d5e myuser/manager:latest (the id is correct). Finally, I edited my existing docker-compose.yml file to look like this:
version: '2'
services:
web:
image: myuser/manager:latest
ports:
- 8080:8080
depends_on:
- db
db:
container_name: sample_db
image: postgres:9.5
volumes:
- sample_db:/var/lib/postgresql/data
environment:
- POSTGRES_PASSWORD=sample
- POSTGRES_USER=sample
- POSTGRES_DB=sample
- PGDATA=/var/lib/postgresql/data/pgdata
ports:
- 5432:5432
volumes:
sample_db: {}
But, now if I issue sudo docker-compose -f docker-compose.yml up command, the database again starts correctly, but I get errors and exit code 1 for the web app part. The problem is the connection string. I believe I have to change it to something else, but I don't know what it should be. I get the following error messages:
web_1 | 2017-06-27 22:11:54.418 ERROR 1 --- [ main] o.a.tomcat.jdbc.pool.ConnectionPool : Unable to create initial connections of pool.
web_1 |
web_1 | org.postgresql.util.PSQLException: Connection to localhost:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections
Any ideas?
Each container has its own network interface with its own localhost. So change how Java points to Postgres:
spring.datasource.url=jdbc:postgresql://localhost:5432/sample
To:
spring.datasource.url=jdbc:postgresql://db:5432/sample
db will resolve to the proper Postgres IP.
Bonus. With docker-compose you don't need to build your image by hand. So change:
web:
image: myuser/manager:latest
To:
web:
build: .
I had the same problem and I lost some time to understand and solve this problem:
org.postgresql.util.PSQLException: Connection to localhost:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
I show all the properties so that everyone understands.
application.properties:
spring.datasource.url=jdbc:postgresql://localhost:5432/testdb
spring.datasource.driver-class-name=org.postgresql.Driver
spring.datasource.username=postgres
spring.datasource.password=postgres
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQL82Dialect
spring.jpa.hibernate.ddl-auto=update
docker-compose.yml:
version: "3"
services:
springapp:
build: .
container_name: springapp
environment:
SPRING_DATASOURCE_URL: jdbc:postgresql://db:5432/testdb
ports:
- 8000:8080
restart: always
depends_on:
- db
db:
image: postgres
container_name: db
environment:
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=postgres
- POSTGRES_DB=testdb
- PGDATA=/var/lib/postgresql/data/pgdata
ports:
- 5000:5432
volumes:
- pgdata:/var/lib/postgresql/data
restart: always
volumes:
pgdata:
For start spring application with local database we use url localhost.
For connect to container with database we need change 'localhost' on your database service, in my case 'localhost' to 'db'.
Solution: add SPRING_DATASOURCE_URL environment in docker-compose.yml wich rewrite spring.datasource.url value for connect:
environment:
SPRING_DATASOURCE_URL: jdbc:postgresql://db:5432/testdb
I hope this helps someone save his time.
You can use this.
version: "2"
services:
sample_db-postgresql:
image: postgres:9.5
ports:
- 5432:5432
environment:
- POSTGRES_PASSWORD=sample
- POSTGRES_USER=sample
- POSTGRES_DB=sample
volumes:
- sample_db:/var/lib/postgresql/data
volumes:
sample_db:
You can use ENV variable to change the db address in your docker-compose.
Dockerfile:
FROM java:8
EXPOSE 8080
ENV POSTGRES localhost
ADD /target/manager.jar manager.jar
ENTRYPOINT exec java $JAVA_OPTS -jar manager.jar --spring.datasource.url=jdbc:postgresql://$POSTGRES:5432/sample
docker-compose:
`
container_name: springapp
environment:
- POSTGRES=db`