Java 应用程序按预期工作，但当我使用Docker对应用程序进行上下文化时，它无法访问Cassandra容器

我的申请有问题。在我和Docker合作开发应用程序之前，一切都很好

我有一个Docker容器，其中包含Cassandra实例

Docker run-p9042:9042——名称Cassandra Cassandra:latest

*当我在IntelliJ中运行我的应用程序或通过cmd

java-jar myjar.jar

运行时，它工作得很好。问题发生在 我试图使用Docker或Docker compose启动应用程序

Docker run-p8080:8080——命名api{image here}

或

Docker compose up

Docker文件：

FROM openjdk:8
COPY . /target/myjar.jar 
EXPOSE 8080
ENTRYPOINT ["java","-jar","target/myjar.jar"]

Docker Compose

version: '3'
services:
  app:
    build: ./app
      ports:
      - "8080:8080"
      depends-on:
      -cassandra
  cassandra:
    container_name 'cassandra'
    image: cassandra
    ports:
    - "9042:9042"

我试图解决的问题：

FROM openjdk:8
COPY . /target/myjar.jar 
EXPOSE 8080
ENTRYPOINT ["java","-jar","target/myjar.jar"]

• 更改应用程序端口
• 构建docker和docker以不同的方式组成文件

应用程序属性

spring.data.cassandra.keyspace-name=message
spring.data.cassandra.schema-action=create_if_not_exists
spring.data.cassandra.contact-points=127.0.0.1
spring.data.cassandra.port=9042

尝试从图像（片段）运行容器时出错。

**正确运行

java-jar

**

2020-06-13 13:35:19.461  INFO 12088 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data Reactive Cassandra repositories in DEFAULT mode.
2020-06-13 13:35:19.593  INFO 12088 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 116ms. Found 0 Reactive Cassandra repository interfaces.
2020-06-13 13:35:19.609  INFO 12088 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data Cassandra repositories in DEFAULT mode.
2020-06-13 13:35:19.630  INFO 12088 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 23ms. Found 1 Cassandra repository interfaces.
2020-06-13 13:35:21.111  INFO 12088 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2020-06-13 13:35:21.134  INFO 12088 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2020-06-13 13:35:21.134  INFO 12088 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.35]
2020-06-13 13:35:21.296  INFO 12088 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2020-06-13 13:35:21.296  INFO 12088 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 3376 ms
2020-06-13 13:35:21.945  INFO 12088 --- [           main] c.d.o.d.i.core.DefaultMavenCoordinates   : DataStax Java driver for Apache Cassandra(R) (com.datastax.oss:java-driver-core) version 4.6.1
2020-06-13 13:35:22.985  INFO 12088 --- [     s0-admin-0] c.d.oss.driver.internal.core.time.Clock  : Using native clock for microsecond precision
2020-06-13 13:35:22.985  INFO 12088 --- [     s0-admin-0] c.d.o.d.i.core.metadata.MetadataManager  : [s0] No contact points provided, defaulting to /127.0.0.1:9042
2020-06-13 13:35:23.961  INFO 12088 --- [        s0-io-0] c.d.o.d.i.core.channel.ChannelFactory    : [s0] Failed to connect with protocol DSE_V2, retrying with DSE_V1
2020-06-13 13:35:23.979  INFO 12088 --- [        s0-io-1] c.d.o.d.i.core.channel.ChannelFactory    : [s0] Failed to connect with protocol DSE_V1, retrying with V4
2020-06-13 13:35:24.387  INFO 12088 --- [        s0-io-2] c.d.oss.driver.api.core.uuid.Uuids       : PID obtained through native call to getpid(): 12088
2020-06-13 13:35:26.186  INFO 12088 --- [     s1-admin-0] c.d.oss.driver.internal.core.time.Clock  : Using native clock for microsecond precision
2020-06-13 13:35:26.186  INFO 12088 --- [     s1-admin-0] c.d.o.d.i.core.metadata.MetadataManager  : [s1] No contact points provided, defaulting to /127.0.0.1:9042
2020-06-13 13:35:26.214  INFO 12088 --- [        s1-io-0] c.d.o.d.i.core.channel.ChannelFactory    : [s1] Failed to connect with protocol DSE_V2, retrying with DSE_V1
2020-06-13 13:35:26.231  INFO 12088 --- [        s1-io-1] c.d.o.d.i.core.channel.ChannelFactory    : [s1] Failed to connect with protocol DSE_V1, retrying with V4
2020-06-13 13:35:30.078  INFO 12088 --- [     s2-admin-0] c.d.oss.driver.internal.core.time.Clock  : Using native clock for microsecond precision
2020-06-13 13:35:31.698  INFO 12088 --- [     s2-admin-0] c.d.o.d.i.core.metadata.MetadataManager  : [s2] No contact points provided, defaulting to /127.0.0.1:9042
2020-06-13 13:35:31.720  INFO 12088 --- [        s2-io-0] c.d.o.d.i.core.channel.ChannelFactory    : [s2] Failed to connect with protocol DSE_V2, retrying with DSE_V1
2020-06-13 13:35:31.732  INFO 12088 --- [        s2-io-1] c.d.o.d.i.core.channel.ChannelFactory    : [s2] Failed to connect with protocol DSE_V1, retrying with V4
2020-06-13 13:35:32.618  INFO 12088 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2020-06-13 13:35:32.943  INFO 12088 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2020-06-13 13:35:32.946  INFO 12088 --- [           main] com.mycompany.asrecruitment.app          : Started app in 16.206 seconds (JVM running for 17.064)

---

您得到的错误是什么。openjdk版本是什么？版本字段为空是否是一个输入错误？连接到cassandra（特别是主机名）的连接属性是什么？哦，这是我在创建此帖子时犯的一个输入错误。java版本是8。我在下面发布了连接道具和错误消息。除非您创建一个桥接网络，否则两个容器不能相互访问。您得到的错误是什么。openjdk版本是什么？版本字段为空是否是一个输入错误？连接到cassandra（特别是主机名）的连接属性是什么？哦，这是我在创建此帖子时犯的一个输入错误。java版本是8。我在下面发布了连接道具和错误消息。除非创建网桥网络，否则两个容器不能相互访问