postgresql - 运行 docker compose 导致 "Connection to localhost:5432 refused."异常

Question

我查看了与此问题相关的 SO 帖子 here , here , here , 和 here但我对提议的修复没有任何运气。每当我运行命令 docker-compose -f stack.yml up 时，我都会收到以下堆栈跟踪信息:

Attaching to weg-api_db_1, weg-api_weg-api_1
db_1       | 2018-07-04 14:57:15.384 UTC [1] LOG:  listening on IPv4 address "0.0.0.0", port 5432
db_1       | 2018-07-04 14:57:15.384 UTC [1] LOG:  listening on IPv6 address "::", port 5432
db_1       | 2018-07-04 14:57:15.388 UTC [1] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
db_1       | 2018-07-04 14:57:15.402 UTC [23] LOG:  database system was interrupted; last known up at 2018-07-04 14:45:24 UTC
db_1       | 2018-07-04 14:57:15.513 UTC [23] LOG:  database system was not properly shut down; automatic recovery in progress
db_1       | 2018-07-04 14:57:15.515 UTC [23] LOG:  redo starts at 0/16341E0
db_1       | 2018-07-04 14:57:15.515 UTC [23] LOG:  invalid record length at 0/1634218: wanted 24, got 0
db_1       | 2018-07-04 14:57:15.515 UTC [23] LOG:  redo done at 0/16341E0
db_1       | 2018-07-04 14:57:15.525 UTC [1] LOG:  database system is ready to accept connections
weg-api_1  | 
weg-api_1  |   .   ____          _            __ _ _
weg-api_1  |  /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
weg-api_1  | ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
weg-api_1  |  \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
weg-api_1  |   '  |____| .__|_| |_|_| |_\__, | / / / /
weg-api_1  |  =========|_|==============|___/=/_/_/_/
weg-api_1  |  :: Spring Boot ::        (v1.5.3.RELEASE)
weg-api_1  | 
weg-api_1  | 2018-07-04 14:57:16.908  INFO 7 --- [           main] api.ApiKt                                : Starting ApiKt v0.0.1-SNAPSHOT on f9c58f4f2f27 with PID 7 (/app/spring-jpa-postgresql-spring-boot-0.0.1-SNAPSHOT.jar started by root in /app)
weg-api_1  | 2018-07-04 14:57:16.913  INFO 7 --- [           main] api.ApiKt                                : No active profile set, falling back to default profiles: default
weg-api_1  | 2018-07-04 14:57:17.008  INFO 7 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@6e5e91e4: startup date [Wed Jul 04 14:57:17 GMT 2018]; root of context hierarchy
weg-api_1  | 2018-07-04 14:57:19.082  INFO 7 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
weg-api_1  | 2018-07-04 14:57:19.102  INFO 7 --- [           main] o.apache.catalina.core.StandardService   : Starting service Tomcat
weg-api_1  | 2018-07-04 14:57:19.104  INFO 7 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.14
weg-api_1  | 2018-07-04 14:57:19.215  INFO 7 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
weg-api_1  | 2018-07-04 14:57:19.215  INFO 7 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 2211 ms
weg-api_1  | 2018-07-04 14:57:19.370  INFO 7 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'dispatcherServlet' to [/]
weg-api_1  | 2018-07-04 14:57:19.375  INFO 7 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
weg-api_1  | 2018-07-04 14:57:19.376  INFO 7 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
weg-api_1  | 2018-07-04 14:57:19.376  INFO 7 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
weg-api_1  | 2018-07-04 14:57:19.376  INFO 7 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
weg-api_1  | 2018-07-04 14:57:19.867 ERROR 7 --- [           main] o.a.tomcat.jdbc.pool.ConnectionPool      : Unable to create initial connections of pool.
weg-api_1  | 
weg-api_1  | org.postgresql.util.PSQLException: Connection to localhost:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.

我认为我的 .yml 文件非常简单，但我一定是遗漏了一些重要的东西，导致两个容器之间的内部路由失败。

编辑

我的 stack.yml 如下:

version: '3'
services:
  db:
    image: postgres
    restart: always
    container_name: db
    environment:
      POSTGRES_USER: root
      POSTGRES_PASSWORD: password
      POSTGRES_DB: weg
    ports:
      - "5432:5432"
  weg-api:
    image: weg-api
    restart: always
    container_name: weg-api
    ports:
      - "8080:8080"
    depends_on:
      - "db"

编辑

我的 Springboot 应用程序属性如下:

spring.datasource.url=jdbc:postgresql://db:5432/weg
spring.datasource.username=root
spring.datasource.password=password
spring.jpa.generate-ddl=true

我不知道如何继续。

Answer 1

您的数据库在 db 容器上运行，而不是在 weg-api 容器内的 localhost 上运行。因此，你必须改变

spring.datasource.url=jdbc:postgresql://localhost:5432/weg

到

spring.datasource.url=jdbc:postgresql://db:5432/weg

我还建议您为每个容器指定 container_name 以确保容器名称始终相同。否则，您有时可能会根据您的配置获得不同的名称。

version: '3'
services:
  db:
    image: postgres
    restart: always
    container_name: db
    environment:
      POSTGRES_USER: root
      POSTGRES_PASSWORD: password
      POSTGRES_DB: weg
    ports:
      - "5432:5432"
  weg-api:
    image: weg-api
    restart: always
    container_name: weg-api
    ports:
      - "8080:8080"
    depends_on:
      - "db"