Docker-compose 无法运行从文件读取配置的 jar

Question

我想在 docker 容器上运行一个 jar，它工作正常，但如果我使用一个需要从配置文件读取的 jar，它就会失败。

接下来是我的docker-compose.yml:

jar:
  image: frolvlad/alpine-oraclejdk8:slim
  ports:
    - "3000:3000"
  volumes:
    - /tmp
    - "./farr-api-0.1.0.jar:/fagor/app.jar"
    - "./config/application.yml:/fagor/config/application.yml"
  command: sh -c 'touch /fagor/app.jar'
  environment:
    - JAVA_OPTS=""
  entrypoint: [ "sh", "-c", "java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /fagor/app.jar" ]

异常(exception)情况:

jar_1  | Exception in thread "main" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
jar_1  |    at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:62)
jar_1  |    at java.lang.Thread.run(Thread.java:745)
jar_1  | Caused by: java.lang.reflect.InvocationTargetException
jar_1  |    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
jar_1  |    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
jar_1  |    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
jar_1  |    at java.lang.reflect.Method.invoke(Method.java:498)
jar_1  |    at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:54)
jar_1  |    ... 1 more
jar_1  | Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'appConfig': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private long es.ikerlan.farr_api.config.AppConfig.id; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'plants[0].plant.id' in string value "${plants[0].plant.id}"

Answer 1

这是一个简单的 dockerfile，可将您的应用程序复制到镜像、安装卷并将配置复制到卷。

FROM frolvlad/alpine-oraclejdk8:slim

MAINTAINER Asier

VOLUME /config

COPY your_app.jar app.jar
COPY your_config.yml config/application.yml

RUN touch /app.jar

ENTRYPOINT exec java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /app.jar

撰写文件可以很简单

version: '2'
    services:
      farrapi_container:
        container_name: farrapicontainer
        build:
          context: ./
          dockerfile: Dockerfile
        ports:
         - "3000:3000"

这样你就可以通过主机更改配置了。确保应用程序正确引用配置文件。无论如何，我仍然会尝试通过环境设置完成配置。在 spring boot 中使用 ENV 设置覆盖 application.properties 中的设置非常简单。