Question

我有一个spring boot应用程序，它连接到mongo db并使用docker部署应用程序。我正在使用这个docker-compose.yml文件，它工作正常：

version: '2'
services:
  db:
      container_name: app-db
      image: mongo
      volumes:
        - /data/db:/data/db
      ports:
        - 27017:27017
  web:
    container_name: spring-app
    image: spring-app
    depends_on:
      - db
    environment:
      SPRING_DATA_MONGODB_URI: mongodb://db:27017/appDB
      SPRING_DATA_MONGODB_HOST: db
    ports:
      - 8080:8080

目前，该应用正在使用嵌入在spring app docker image（spring-app）中的application.properties文件。如何使用docker-compose外化/传入application.properties文件？

感谢您的帮助

Answer 1

您必须根据需要使用Spring Profiles定义环境变量。

server:
    port: 9000
---

spring:
    profiles: development
server:
    port: 9001

---

spring:
    profiles: production
server:
    port: 0

参考：https://docs.spring.io/spring-boot/docs/current/reference/html/howto-properties-and-configuration.html#howto-change-configuration-depending-on-the-environment

您可以定义在运行时需要选择哪个配置文件。

version: '2'
services:
  db:
      container_name: app-db
      image: mongo
      volumes:
        - /data/db:/data/db
      ports:
        - 27017:27017
  web:
    container_name: spring-app
    image: spring-app
    depends_on:
      - db
    environment:
      SPRING_DATA_MONGODB_URI: mongodb://db:27017/appDB
      SPRING_DATA_MONGODB_HOST: db
      SPRING_PROFILES_ACTIVE=development
    ports:
      - 8080:8080

但如果配置发生变化并且不理想，则需要重建docker镜像。 Spring Cloud Config（Vault）随处可用，可帮助您将配置外部化。

http://cloud.spring.io/spring-cloud-static/spring-cloud-config/1.3.0.RELEASE/

Answer 2

我不确定我是否会回答这个问题，实际上我是否理解这一点。但是，这将是我的2美分：

Docker-compose：

version: "3.4"

x-common-variables:
  &db-env-vars
    POSTGRES_DB: anime
    POSTGRES_USER: root
    POSTGRES_PASSWORD: root
    PORT_API: 8383

volumes:
  webflux_data:

networks:
  webflux_rede:

services:
  db-compose:
    container_name: db-postgres
    image: postgres:9.5-alpine
    hostname: postgres # postgres hostname
    restart: always
    ports:
      - 5432:5432
    volumes:
      - webflux_data:/var/lib/postgresql/data
    networks:
      - webflux_rede
    environment:
      *db-env-vars

web-api:
    image: pauloportfolio/web-api
    build:
      context: ./
      dockerfile: ./dev-dockerfile
      args:
        JAR_FILE: target/spring-webflux-essentials-0.0.1-SNAPSHOT.jar
    ports:
      - 8383:8383
      - 5005:5005
    volumes:
      - webflux_data:/var/lib/postgresql/data
    depends_on:
      - db-compose
    networks:
      - webflux_rede
    environment:
      DB_URL: r2dbc:pool:postgresql://db-compose:${PORT_DB}/${POSTGRES_DB}
      <<: *db-env-vars
      PROFILE: dev
      DEBUG_OPTIONS: -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:5005 -Xmx1G -Xms128m -XX:MaxMetaspaceSize=128m

我的application-dev.properties

server.port=${PORT_API}

# DB-VERSION-MIGRATION
r2dbc.migrate.resources-path=classpath:/db/migration/postgresql/*.sql
r2dbc.migrate.dialect=postgresql

# POSTGRES-R2DBC - RODA COM COMPOSE
spring.r2dbc.url=${DB_URL}
spring.r2dbc.name=${POSTGRES_DB}
spring.r2dbc.username=${POSTGRES_USER}
spring.r2dbc.password=${POSTGRES_PASSWORD}
spring.r2dbc.pool.validation-query=SELECT 1

对我来说，工作完全正常且稳定。

docker-compose - 外化spring application.properties

2 个答案: