无法从postman向我的docker spring boot容器发送请求

Question

我试图从postman向我的后端spring boot容器发送请求，我得到

“无法发送请求”消息

docker-compose.yml：

version: '3'

services:
  mysqldb:
    image: mysql
    environment:
      - MYSQL_ROOT_PASSWORD=root
      - MYSQL_DATABASE=booking
      - MYSQL_USER=dhia
      - MYSQL_PASSWORD=root
    ports:
      - 3308:3306

  app:
    image: app:latest
    ports:
       - 8091:8091
    environment:
      SPRING_DATASOURCE_URL: jdbc:mysql://mysqldb:3306/booking
    depends_on:
       - mysqldb

应用程序启动良好，0个错误

这是我的Dockerfile

FROM maven:3.8.6-openjdk-18-slim as MAVEN_BUILD
WORKDIR /build
COPY pom.xml .
RUN mvn dependency:go-offline
COPY src ./src
RUN mvn package -Dmaven.test.skip=true
FROM openjdk:18-alpine
WORKDIR /app
ARG JAR_FILE=*.jar
COPY --from=MAVEN_BUILD /build/target/${JAR_FILE} ./app.jar
EXPOSE 8080
CMD ["java", "-jar", "app.jar"]

bookingsystem-app-1      |
bookingsystem-app-1      |   .   ____          _            __ _ _
bookingsystem-app-1      |  /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
bookingsystem-app-1      | ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
bookingsystem-app-1      |  \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
bookingsystem-app-1      |   '  |____| .__|_| |_|_| |_\__, | / / / /
bookingsystem-app-1      |  =========|_|==============|___/=/_/_/_/
bookingsystem-app-1      |  :: Spring Boot ::                (v2.7.3)
bookingsystem-app-1      |
bookingsystem-app-1      | 2022-08-21 11:10:34.994  INFO 1 --- [           main] Booking.BookingApplication               : Starting BookingApplication v0.0.1-SNAPSHOT using Java 18-ea on 521f32647790 with PID 1 (/app/app.jar started by root in /app)
bookingsystem-app-1      | 2022-08-21 11:10:35.005  INFO 1 --- [           main] Booking.BookingApplication               : No active profile set, falling back to 1 default profile: "default"
bookingsystem-app-1      | 2022-08-21 11:10:36.215  INFO 1 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
bookingsystem-app-1      | 2022-08-21 11:10:36.325  INFO 1 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 90 ms. Found 4 JPA repository interfaces.
bookingsystem-app-1      | 2022-08-21 11:10:37.470  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8090 (http)
bookingsystem-app-1      | 2022-08-21 11:10:37.499  INFO 1 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
bookingsystem-app-1      | 2022-08-21 11:10:37.499  INFO 1 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.65]
bookingsystem-app-1      | 2022-08-21 11:10:37.637  INFO 1 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
bookingsystem-app-1      | 2022-08-21 11:10:37.638  INFO 1 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 2339 ms
bookingsystem-app-1      | 2022-08-21 11:10:37.753  INFO 1 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
bookingsystem-app-1      | 2022-08-21 11:10:38.142  INFO 1 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
bookingsystem-app-1      | 2022-08-21 11:10:38.342  INFO 1 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
bookingsystem-app-1      | 2022-08-21 11:10:38.466  INFO 1 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 5.6.10.Final
bookingsystem-app-1      | 2022-08-21 11:10:38.792  INFO 1 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
bookingsystem-app-1      | 2022-08-21 11:10:38.946  INFO 1 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
bookingsystem-app-1      | Hibernate:
bookingsystem-app-1      |
bookingsystem-app-1      |     alter table bookings
bookingsystem-app-1      |        add constraint FK4xjjw8rumqxvr8c6t7xm6q8ty
bookingsystem-app-1      |        foreign key (hike_id)
bookingsystem-app-1      |        references hikes (id)
bookingsystem-app-1      | Hibernate:
bookingsystem-app-1      |
bookingsystem-app-1      |     alter table bookings
bookingsystem-app-1      |        add constraint FKg37gxkbbjvc3dp3een92kxy05
bookingsystem-app-1      |        foreign key (hiker_id)
bookingsystem-app-1      |        references hikers (id)
bookingsystem-app-1      | Hibernate:
bookingsystem-app-1      |
bookingsystem-app-1      |     alter table hikes
bookingsystem-app-1      |        add constraint FKs8qvf1tnml0ahxs407ggng3bs
bookingsystem-app-1      |        foreign key (trail_id)
bookingsystem-app-1      |        references trails (id)
bookingsystem-app-1      | 2022-08-21 11:10:39.988  INFO 1 --- [           main] o.h.e.t.j.p.i.JtaPlatformInitiator       : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
bookingsystem-app-1      | 2022-08-21 11:10:40.000  INFO 1 --- [           main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
bookingsystem-app-1      | 2022-08-21 11:10:40.542  WARN 1 --- [           main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
bookingsystem-app-1      | 2022-08-21 11:10:41.008  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8090 (http) with context path ''
bookingsystem-app-1      | 2022-08-21 11:10:41.019  INFO 1 --- [           main] Booking.BookingApplication               : Started BookingApplication in 6.813 seconds (JVM running for 7.789)

这是我的应用程序属性文件:

spring.datasource.url = jdbc:mysql://localhost:3308/booking
spring.datasource.username=root
spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect
spring.datasource.password=root
createDatabaseIfNotExist=true
### JPA / HIBERNATE ###
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=none
spring.jpa.generate-ddl = true
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.jpa.properties.show-sql = true
spring.jpa.properties.hibernate.format_sql = true
server.port=8090 

我无法访问我的控制器或发送任何请求的问题我尝试了所有的端口和所有的名称（localhost，预订，应用程序），总是CONNREFUSED

http://mysqldb:8080/hikes

超文本传输协议：//mysql db： 8090/hikes

http://mysqldb:8091/hikes

http://localhost:8080/hikes

http://localhost:8090/hikes

http://localhost:8091/hikes

顺便说一句，当我在没有容器的情况下运行它时，一切都很好。

Answer 1

尝试使用相同的端口号dockerfile更改这些端口号-