Docker compose：Cassandra 未连接到同一网络中的我的 Spring 应用程序

Question

我的应用程序依赖于 Cassandra，所以我将它们全部放在 docker-compose 文件中，现在只需使用此处给出的普通 docker，我就可以在本地正常运行它，但是当我尝试在 compose 中使用相同的配置时，我不断出现错误

顶部堆栈跟踪：

[s0] Error connecting to Node(endPoint=localhost/127.0.0.1:9042, hostId=null, hashCode=8a90356), trying next node (ConnectionInitException: [s0|control|connecting...] Protocol initialization request, step 1 (OPTIONS): failed to send request (io.netty.channel.StacklessClosedChannelException))

结束：

    Suppressed: io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: localhost/127.0.0.1:9042
    Caused by: java.net.ConnectException: Connection refused
        at java.base/sun.nio.ch.Net.pollConnect(Native Method)
        at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:672)
        at java.base/sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:946)
        at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:337)
        at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:334)
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:776)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
        at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
        at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
        at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
        at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: io.netty.channel.StacklessClosedChannelException: null
    at io.netty.channel.AbstractChannel$AbstractUnsafe.flush0()(Unknown Source)

我的docker-compose：

version: "3.8"

services:
  urls-storage:
    image: cassandra:latest
    container_name: urls-storage-db
    command: [ -f ]
    environment:
      CASSANDRA_CLUSTER_NAME: app
    ports:
      - "9042:9042"
      - "9160:9160"
      - "7199:7199"
    healthcheck:
      test: [ "CMD-SHELL", "[ $$(nodetool statusgossip) = running ]" ]
      interval: 10s
      timeout: 5s
      retries: 3
    volumes:
      - cassandra_data:/var/lib/cassandra
  app:
    build: .
    container_name: url-shortener-service
    ports:
      - '8083:8083'
    depends_on:
      urls-storage:
        condition: service_healthy

volumes:
  cassandra_data:
    driver: local

application.yaml：

server:
  port: 8083
spring:
  application:
    name: url-shortener-service
  cassandra:
    port: 9042
    keyspace-name: links
    schema-action: create-if-not-exists
    connection:
      connect-timeout: 30s
      init-query-timeout: 10s
    request:
      timeout: 10s
    contact-points: urls-storage-db
    local-datacenter: datacenter1

我什至尝试对接触点进行硬编码，但无济于事，我可以访问撰写容器中的 cassandra，但我的应用程序似乎无法访问它。

Answer 1

1. cassandra

   不应该是数据属性吗？路径中应该有数据，不是吗？
2. 该错误表明您的应用程序正在尝试连接到

   localhost:9042

   ，这是错误的，因为它应该是 cassandra 容器的主机名，是吗？应仔细检查您的接触点设置