Spring Boot static 资源在我建的 jar 但不在 jar 部署到 Docker

Question

I wonder if the title of this post shouldn't be "I'm ignorant." This is obviously a common problem and I've read multiple threads on it but somewhere I'm missing knowledge or... something.

• /questions/24661289/spring-boot-not-serving-static-content
• /questions/54735747/spring-boot-not-serving-static-files-from-inside-jar
• /questions/63061943/how-to-load-static-files-with-spring-boot-inside-a-docker-container-hosted-on-aw

I've confirmed that my problem is that the static resources aren't making it to Docker. Using CLI, I can unzip the jar there and see that no html, js, or css files are there.

However, I've confirmed that the jar I'm using (I think I'm using it, anyway. I don't know how it couldn't be.) does have them in it. It's as if they're getting deliberately extracted and excluded somehow.

Here's my application.properties:

#FOR LOCAL
#spring.datasource.url=jdbc:postgresql://localhost:5432/library

#FOR DOCKER
spring.datasource.url=jdbc:postgresql://postgresqldb:5432/library

spring.datasource.username=postgres
spring.datasource.password=password
spring.datasource.driver-class-name=org.postgresql.Driver

#The SQL dialect makes Hibernate generate better SQL for the chosen database
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect

#Hibernate ddl auto (create, create-drop, validate, update)
spring.jpa.hibernate.ddl-auto=create
spring.datasource.initialization-mode=always

#This enables app to serve the static content. Not sure why I need it, but it makes it work locally.
server.contextPath=/

Here's my Dockerfile

FROM openjdk:8-jdk-alpine

ARG JAR_FILE=build/libs/microservice1-0.0.1-SNAPSHOT.jar
COPY ${JAR_FILE} bookws.jar

ENTRYPOINT ["java","-jar","/bookws.jar"]

And here's my docker-compose.yaml

version: '3.1'
services:
  app:
    container_name: bookws
    image: bookws
    build: ./
    ports:
      - "8080:8080"
    depends_on:
      - postgresqldb
  postgresqldb:
    image: postgres
    ports:
      - "5432:5432"
    environment:
      - POSTGRES_PASSWORD=password
      - POSTGRES_USER=postgres
      - POSTGRES_DB=library

Here's my main java file:

//package and imports excluded for brevity

@SpringBootApplication
public class Microservice1Application {

    public static void main(String[] args) {
        SpringApplication.run(Microservice1Application.class, args);
    }

}

My static resources are stored in src/main/resources/static

static/index.html
static/js/book-crud.js
static/js/jquery-3.5.0.min.js
static/js/jquery-ui-1.12.1.min.js
static/css/main.css
static/img/ (some .pngs and some .jpgs)

EDIT: Adding my build.gradle file:

plugins {
    id 'org.springframework.boot' version '2.3.3.RELEASE'
    id 'io.spring.dependency-management' version '1.0.10.RELEASE'
    id 'java'
}

group = 'com.familam.learning'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '1.8'

configurations {
    compileOnly {
        extendsFrom annotationProcessor
    }
}

repositories {
    mavenCentral()
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-actuator'
    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
    implementation 'org.springframework.boot:spring-boot-starter-hateoas'
    implementation 'org.springframework.boot:spring-boot-starter-web'
    compileOnly 'org.projectlombok:lombok'
    runtimeOnly 'org.postgresql:postgresql'
    annotationProcessor 'org.projectlombok:lombok'
//  annotationProcessor 'org.springframework.boot:spring-boot-configuration-processor'
    testImplementation('org.springframework.boot:spring-boot-starter-test') {
        exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
    }
}

test {
    useJUnitPlatform()
}

Thanks in advance for any insights,. If I need to add any further info? I'm happy to. What is the probably simple thing I'm missing?

Answer 1

My problem was not with my configuration, but with my ignorance of how docker-compose works. The docker-compose command 'up' does not re-build the docker image. You need to run the 'docker-compose build' command first. That was all I was lacking.