🎓 What is NSQ?

NSQ is a realtime distributed messaging platform.

Features

• support distributed topologies with no SPOF
• horizontally scalable (no brokers, seamlessly add more nodes to the cluster)
• low-latency push based message delivery (performance)
• combination load-balanced and multicast style message routing
• excel at both streaming (high-throughput) and job oriented (low-throughput) workloads
• primarily in-memory (beyond a high-water mark messages are transparently kept on disk)
• runtime discovery service for consumers to find producers (nsqlookupd)
• transport layer security (TLS)
• data format agnostic
• few dependencies (easy to deploy) and a sane, bounded, default configuration
• simple TCP protocol supporting client libraries in any language
• HTTP interface for stats, admin actions, and producers (no client library needed to publish)
• integrates with statsd for realtime instrumentation
• robust cluster administration interface (nsqadmin)

✨ Services

• NSQ
• NSQ Admin
• NSQ Lookupd
• NGINX

💁‍♀️ How to use

• Click the Railway button 👆
• Add the required environment variables
• Deploy
• To Access NSQ Admin visit the URL from railway deployment for Nsqadmin service
• NSQ Admin Dashboard
  • NSQ Admin is a web UI to view aggregated cluster stats in realtime and perform various administrative tasks.
  • It can be used to view the state of the cluster, show metadata for topics and channels, show the message backlog for channels, force re-queued messages to be sent to clients, and show client connections.
  • To view the list of streams, click on streams
  • It shows list of NSQd nodes and their status
  • By Clicking on any node, it shows the list of topics and channels
  • To view list of producers, click on Nodes
  • NSQAdmin also provides feature to create new topic and channels in Lookup tab
  • You can also manage any topic and channel, by click on topic or channel name
  • NSQ has more features like TLS, Authorization, etc. which can be configured in config files
• NSQ Client Libraries
  • There are many officially support client libraries for NSQ. You can check the list here: https://nsq.io/clients/client_libraries.html
  • In this Repository under examples/ folder there are python and node example files to demostrate and how to use NSQ queue system as beginner.
  • Known Issue: NSQ Subscription only works via TCP and HTTP, and currently Railway doesn't support TCP/HTTP exposure publicly but it will still work when you deploy a service internally within a project and access it.
  • You can perform basic operation like all CRUD using CURL or any tool to interact with HTTP protocol like POSTMAN.
  • To create a new topic bash curl -X POSThttps://.up.railway.app/topic/create?topic=name
  • To create a new channel bash curl -X POST https://.up.railway.app/channel/create?topic=name&channel=name
  • To Get list of Topic or Channels bash curl -X GET https://.up.railway.app/topics curl -X GET https://.up.railway.app/channels?topic=name
  • To publish a message bash curl -d "test message" https://.up.railway.app/pub?topic=name
  • There are more operations which can be performed using HTTP protocol, you can check the list here: https://nsq.io/components/nsqd.html#http-api
• Enjoy!

📝 Notes

• Source repo: https://github.com/nsqio/nsq
• Docs: https://nsq.io/overview/design.html