如何从远程主机访问在主机上的docker上运行的进程

Question

How to access or connect to a process running on docker on host A from a remote host B

consider a Host A with ip 192.168.0.3 which is running a application on docker on port 3999 . If i want to access that application from remote machine with IP 192.168.0.4 in same subnet.

To be precise i am running Kafka producer on the server and i am trying to receive using Kafka-console-Consumer.

Answer 1

• Use --net=host to run your container and it'll use the host's network stack, then you can connect to the application running inside container like it's running on host directly.
• Port mapping, use option -p to map the port inside your container to a port of your host. eg docker run -d -p <container port>:<host port> <image> , then you can connect to <host>:<host port> to connect your application inside container
• Docker's built-in multi-host network . In early releases the network driver is isolated from docker's core, you have to use 3rd party tools like flannel or weave for multi-host connection, but from release 1.9, it has been merged into docker . You can follow it's guide to set it up.

Hope this is helpful :-)

Answer 2

First you need to bind docker container's port to the Host A:

docker run -d -p 3999:3999 kafka-producer

Then you need to access Host A from Host B using IP:Port

192.168.0.3:3999