Docker中的Cassandra无法从外部连接 [英] Cassandra in Docker cant connect from outside

问题描述

我是Docker和Cassandar一词的新手。我在从计算机上连接Docker中的Cassandra时遇到问题。

Hi I am new to word Docker and Cassandar. I have a problem connecting to Cassandra in Docker from my computer.

我运行了容器Cassandra，看到暴露的ips和端口是192.168.99.100:9042。（第一张图片） ）在docker中，我什至可以看到测试群集正在运行，但是当我想通过NoSQL Manager for Cassandra连接到Cassandra时，总是出现错误消息尝试查询的主机均不可用。

I run container Cassandra and I see that exposed ips and ports are 192.168.99.100:9042.(first image) In docker I can even see that "Test cluster" is running but when I want to connect to Cassandra by NoSQL Manager for Cassandra there is always error message "None of the hosts tried for query are available".

谢谢。

推荐答案

您不公开端口。 9042是docker端口。
运行docker映像时，必须记住以下几点：

you don't expose a port. 9042 is docker port. When you run the docker image you must remember this:

docker run -p 9042:9042 image-name

第一个9042定义外部世界连接的端口号，第二个9042定义将绑定的docker端口号外部端口号为9042。

first 9042 define the port number where outer world will connect and 2nd 9042 defines docker's port number which will be bound with outer port number 9042.

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