JHipster Registry中网关未显示，Docker启动失败求助

问题描述 #

为网关应用创建Docker镜像后，执行docker-compose up命令，仅微服务和Registry正常运行，网关未出现在运行实例列表中。

报错日志 #

22-08-25 10:57:23.661 ERROR 1 --- [  restartedMain] o.s.boot.SpringApplication               : Application run failed
mygateway_1                |
mygateway_1                | org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'securityConfiguration' defined in file [/app/classes/ma/s2m/nxp/config/SecurityConfiguration.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userDetailsService' defined in file [/app/classes/ma/s2m/nxp/security/DomainUserDetailsService.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in ma.s2m.nxp.repository.UserRepository defined in @EnableR2dbcRepositories declared on DatabaseConfiguration: Cannot create inner bean '(inner bean)#139c4f36' of type [org.springframework.data.repository.core.support.RepositoryFragmentsFactoryBean] while setting bean property 'repositoryFragments'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#139c4f36': Invocation of init method failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepositoryInternalImplFragment': Cannot resolve reference to bean 'userRepositoryInternalImpl' while setting constructor argument; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userRepositoryInternalImpl' defined in file [/app/classes/ma/s2m/nxp/repository/UserRepositoryInternalImpl.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'r2dbcDatabaseClient' defined in class path resource [org/springframework/boot/autoconfigure/r2dbc/ConnectionFactoryDependentConfiguration.class]: Unsatisfied dependency expressed through method 'r2dbcDatabaseClient' parameter 0; nested exception is
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'connectionFactory' defined in class path resource [org/springframework/boot/autoconfigure/r2dbc/ConnectionFactoryConfigurations$PoolConfiguration$PooledConnectionFactoryConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [io.r2dbc.pool.ConnectionPool]: Factory method 'connectionFactory' threw exception; nested exception is java.lang.IllegalStateException: Unable to create a ConnectionFactory for 'ConnectionFactoryOptions{options={driver=postgresql, database=myGateway, host=mygateway-postgresql, port=5432, user=myGateway}}'. Available drivers: [ h2, pool ]

错误分析 #

核心问题是应用缺少PostgreSQL的R2DBC驱动依赖，当前环境仅识别到H2和连接池驱动，无法创建PostgreSQL的连接工厂，导致Spring容器初始化失败，网关服务无法启动。

解决方案 #

• 添加PostgreSQL R2DBC驱动依赖
  若使用Maven，在pom.xml中引入依赖：

  <dependency>
      <groupId>org.postgresql</groupId>
      <artifactId>r2dbc-postgresql</artifactId>
  </dependency>
  

  若使用Gradle，在build.gradle中添加：

  implementation 'org.postgresql:r2dbc-postgresql'
  

• 确认依赖被打包到镜像
  重新执行项目构建命令（Maven：mvn clean package；Gradle：./gradlew clean bootJar），确保驱动被包含在最终生成的jar包中。

• 检查Docker镜像构建逻辑
  查看Dockerfile，确认正确复制了构建后的jar包。例如多阶段构建的Dockerfile需保证依赖层正常复制：

  FROM openjdk:17-jdk-slim as builder
  WORKDIR /app
  COPY . .
  RUN ./mvnw clean package -DskipTests
  
  FROM openjdk:17-jdk-slim
  WORKDIR /app
  COPY --from=builder /app/target/*.jar app.jar
  CMD ["java", "-jar", "app.jar"]
  

• 验证R2DBC连接配置
  检查应用配置文件（如application.yml）中的R2DBC连接参数是否正确，格式示例：

  spring:
    r2dbc:
      url: r2dbc:postgresql://mygateway-postgresql:5432/myGateway
      username: myGateway
      password: your_database_password
  

内容的提问来源于stack exchange，提问作者Khadija