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.

• https://nats.io/
• NATS Streaming adds persistence, message replay and durable subscriptions
• Docker: https://hub.docker.com/_/nats
• GitHub: https://github.com/nats-io
• https://github.com/nats-io/nats-server/releases

nats context ls

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

Related

• Prometheus NATS exporter
• Synadia
• 8443
• 4222
• get_last_msg

See also

• nats-server, nats-server.conf, nats-server --help
• nats [ pub | subscribe | server | stream | reply | account | events | errors | consumer | --version | --help ]
• NATS Messaging, installation, Install NATS using docker, nats server check, nats-server.conf, nats.ws, 4222, Synadia, Synadia Cloud, NATS JetStream, Terraform provider, Leaf Nodes
• 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