Docker中无法连接Cassandra实例，出现ConnectionRefusedError

我通过Docker运行Cassandra容器，配置如下，尝试在Cassandra启动运行后执行script.sh脚本，但该脚本持续记录如下错误：

dd_cassandra  | Connection error: ('Unable to connect to any servers', {'127.0.0.1:9042': ConnectionRefusedError(111, "Tried connecting to [('127.0.0.1', 9042)]. Last error: Connection refused")})
dd_cassandra  | Waiting for cassandra-node-1...

我尝试了检查Cassandra节点就绪状态的方案，仅在Cassandra就绪后执行脚本，但脚本陷入无限等待。

配置文件 #

docker-compose.yml #

version: '3'

services:
  dd_cassandra:
    container_name: dd_cassandra
    build:
      context: ./cassandra
      dockerfile: Dockerfile
      args:
        BASE_IMAGE: cassandra:latest
    ports:
      - "9042:9042"

cassandra/Dockerfile #

ARG BASE_IMAGE
FROM ${BASE_IMAGE}

COPY script.sh /
RUN chmod +x /script.sh
EXPOSE 9042
CMD ["/script.sh"]

cassandra/script.sh #

#!/bin/bash

while ! cqlsh -e 'describe cluster' ; do
  echo "Waiting for cassandra-node-1...";
  sleep 10
done

# some other piece of code that adds runs `cqlsh` command 
# in the cassandra database

内容的提问来源于stack exchange，提问作者asn