如何为DropWizard应用程序在docker容器中的本地计算机上运行的MySQL服务器上使用MySQL？

问题描述

我是Docker的新手，目前正努力将我的dropwizard应用程序容器化。每次构建容器，运行容器并检查日志时，都会收到MySQL连接失败错误，这在容器在虚拟机上运行时是有意义的，对于localhost URL而言，它什么也没有。我想知道如何做才能使我的MySQL在docker容器中可访问。谢谢。这是我的config.yml文件看起来像rn的样子。

  driverClass: com.mysql.cj.jdbc.Driver
  # the username
  user: root

  # the password
  password:

  # the JDBC URL
  url: jdbc:mysql://localhost:3306/locations?useLegacyDatetimeCode=false&serverTimezone=UTC

  # any properties specific to your JDBC driver:
  properties:
    charSet: UTF-8

  # the maximum amount of time to wait on an empty pool before throwing an exception
  maxWaitForConnection: 1s

  # the SQL query to run when validating a connection's liveness
  validationQuery: "/* MyService Health Check */ SELECT 1"

  # the timeout before a connection validation queries fail
  validationQueryTimeout: 3s

  # the minimum number of connections to keep open
  minSize: 8

  # the maximum number of connections to keep open
  maxSize: 32

  # whether or not idle connections should be validated
  checkConnectionWhileIdle: false

  # the amount of time to sleep between runs of the idle connection validation,abandoned cleaner and idle pool resizing
  evictionInterval: 10s

  # the minimum amount of time an connection must sit idle in the pool before it is eligible for eviction
  minIdleTime: 1 minute

  # Logging settings.
#logging:
#  level: INFO
#  loggers:
#    io.dropwizard: DEBUG
#    org.eclipse.jetty.servlets: DEBUG
#    org.hibernate.SQL: ALL
#    com.udemy.LocationsApplication:
#      level: ALL,#      additive: false
#      appenders:
#        - type: conso
#          logFormat: "%red(CDR) [%magenta(%date)] [%thread] [%cyan(%logger{0})]: %message%n"
#  appenders:
#    - type: console
#      logFormat: "%highlight(%-5level) [%magenta(%date)] [%thread] [%cyan(%logger{0})]: %message%n" ```

解决方法

假设您有一个mysql容器，它暴露了端口3306和dropwizard容器。

您可以为他们创建网络

docker network create <network_name>

并将其分配给码头工人

docker run .... --network <network_name>

这应该使机器人docker彼此见面

如果使用docker network ls，则可以看到使用docker-compose的网络，它将自动生成网络。

您还可以使用host网络，这也使它们能够连接到计算机（如果在其中之一中运行docker时为虚拟机）中的端口。