everyone. I have some problems with project deployment, and i already spent few days to solve it. I developing mobile backend on stack:
docker-compose.yml
version: '3'
services:
web:
image: mobilebackend
ports:
- 8088:8080
depends_on:
- db
links:
- db
db:
container_name: transneft_db
image: postgres
restart: always
volumes:
- transneft_db:/var/lib/postgresql/data
environment:
- POSTGRES_PASSWORD=pass
- POSTGRES_USER=user
- POSTGRES_DB=db
- PGDATA=/var/lib/postgresql/data/pgdata
ports:
- 54320:5432
adminer:
image: adminer
restart: always
ports:
- 8082:8080
volumes:
transneft_db: {}
application.properties
spring.datasource.url=jdbc:postgresql://localhost:54320/db
spring.datasource.username=user
spring.datasource.password=pass
spring.datasource.platform=postgres
spring.datasource.driver-class-name=org.postgresql.Driver
spring.jpa.database=POSTGRESQL
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true
spring.jpa.generate-ddl=true
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
jwt.secret =aotransneftsibir
logging.level.org.springframework.web=DEBUG
logging.level.org.hibernate=ERROR
build.gradle
buildscript {
ext {
springBootVersion = '1.5.10.RELEASE'
}
repositories {
mavenCentral()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
classpath('se.transmode.gradle:gradle-docker:1.2')
}
}
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'org.springframework.boot'
apply plugin: 'docker'
apply plugin: 'application'
repositories {
mavenCentral()
}
compileJava {
sourceCompatibility = 1.8
targetCompatibility = 1.8
mainClassName = "com.backend.MobilebackendApplication"
}
jar {
baseName = "backend-api"
group = "com.backend"
version = "0.0.1-SNAPSHOT"
manifest { attributes "Main-Class": "com.backend.mobilebackend.MobilebackendApplication" }
}
docker {
baseImage "frolvlad/alpine-oraclejdk8:slim"
maintainer 'Alex Scrobot "scrobot91@gmail.com"'
}
dependencies {
// spring boot
compile('org.springframework.boot:spring-boot-starter-data-jpa')
compile('org.springframework.boot:spring-boot-starter-data-rest')
compile('org.springframework.boot:spring-boot-starter-web')
runtime('org.springframework.boot:spring-boot-devtools')
//postgresql
runtime('org.postgresql:postgresql')
//gson
compile group: 'com.google.code.gson', name: 'gson', version: '2.7'
// JWT
compile 'io.jsonwebtoken:jjwt:0.9.0'
//test env
testCompile('org.springframework.boot:spring-boot-starter-test')
testCompile('org.springframework.security:spring-security-test')
}
On localhost working good, project are building with DevTools and working fine. Docker container with postgresql is up, i can access connection to it with localhost:port, all fine.
Problems started, then i tried to call:
./gradlew build distDocker --refresh-dependencies
In this case property spring.datasource.url
have to contain localhost value, of build will fail. I put localhost value, get success message, that image is built. So, then i try to run container with Spring Boot .jar i get 'Connection Refused Error'. I have some thoughts about this case: container with .jar is running up, it tries to get database access by localhost:db_port, but inside this container cannot be db connection to its localhost. So, then i put in application.property
spring.datasource.url=jdbc:postgresql://db:54320/db
but then, i cannot build updated image. Then gradle try to boot assembled .jar, it cannot access to db:54320, because boot is running not in container, and right connections localhost:54320. Do you feel the vicious circle of how I feel it?))
I don't understand, what i'm doing wrong... please, help me to solve this problem.. Thank you.
The quick and dirty solution would be putting 127.0.0.2 db into your /etc/hosts file, and use jdbc:postgresql://db:54320/db as database URL and thing would work.
The nicer solution is using a build container for your application. So your docker-compose would look like this:
version: '3'
services:
web:
image: mobilebackend
# The value of build refers to a directory at where your compose file is.
build: mobilebackend
...
Within the mobilebackend directory, you create a Dockerfile like this:
FROM gradle AS build
RUN gradle build ...
FROM openjdk
COPY --from=build mobilebackend.jar .
RUN java -jar mobilebackend.jar
As you don't need to expose your database port for this, you can even use the standard port: jdbc:postgresql://db/db
Now you can compile and run your whole application with
docker-compose build
docker-compose up
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