in my favorite scenario, I have mutliple dynamic nodes running a identical sails.js app. The nodes need to send messages each other. I try to archieve this through a redis db with a node model. Each server subscribes to all models and creates one for himself. This could be done easily on a client with sails.io.js.
But how can I subscribe and register callback functions to model rooms at server code? These nodes cannot communicate through tcp, because they are living in a isolated docker environment. Any thoughts would be greatly appreciated!
Put your nodes on the same docker network to allow them to discover each other. If you not familiar with docker networks yet, I recommend to read Understand Docker container networks, it's an awesome tool.
This could be done easily on a client with sails.io.js.
It is totally possible. You have to use the socket.io.js client on the server: https://github.com/balderdashy/sails.io.js
For server to server communication I prefer Publish/Subscribe messaging tools like redis PupSub http://redis.io/topics/pubsub or https://www.rabbitmq.com/