NATS Messaging

NATS (2011) is an open-source software messaging system written in Go programming language with Kubernetes and Prometheus integration. NATs sever listen on TCP port 4222 and monitor port on 8222 curl http://127.0.0.1:8222/routez.

• NATS Streaming adds persistence, message replay and durable subscriptions

Monitoring:

• curl http://127.0.0.1:8222/routez
  • http://demo.nats.io:8222/routez?subs=1
• curl http://127.0.0.1:8222/varz
• curl http://127.0.0.1:8222/connz
• http://demo.nats.io:8222/connz?limit=16&offset=128
• http://demo.nats.io:8222/connz?state=closed
• http://demo.nats.io:8222/connz?limit=1&offset=1&subs=1

gateway

• curl http://127.0.0.1:8222/gatewayz

Leaf

• http://demo.nats.io:8222/leafz?subs=1

Subscription

• http://demo.nats.io:8222/subsz

Activities

Basic

1. Learn about wikipedia:Message-oriented_middleware and different software implementations such us: ActiveMQ, RedHat AMQ or Apache Kafka
2. Install NATS using docker: https://hub.docker.com/_/nats
   1. Install NATS in macOS: brew install nats-server
   2. Install NATS streaming server in macOS: brew install nats-streaming-server
3. NATS: Send your first message

Medium

1. Learn how to monitor your NATS: https://nats-io.github.io/docs/faq#how-can-i-monitor-my-nats-cluster

Advanced

1. Read NATS source code: https://github.com/nats-io/nats-server

See also

• MQ, PubSub, AMQP, NATS, Apache Kafka, IBM MQ, ActiveMQ, Fuse Message Broker, MQTT, NSQ, RabbitMQ, AWS Kinesis and NATS Messaging, ZeroMQ, Message-oriented middleware (MOM), Apache Pulsar, HiveMQ
• Prometheus NATS exporter