NATS multiple seed cluster

"NATS.io is a simple, secure and high performance open source messaging system for cloud native applications, IoT messaging, and microservices architectures."

There are some documents for NATS clustering, here and here.

Today, we would like to start a NATS cluster with two seed servers, the architecture look like: 

// To fill in the architecture diagram

Here are the steps for starting up the cluster:

• Start up the two seed servers (seed1 and seed2):

	# Start the first seed node
	./nats-server -p 4222 --cluster nats://0.0.0.0:5222 --routes nats://localhost:5223
	# Start the second seed node
	./nats-server -p 4223 --cluster nats://0.0.0.0:5223 --routes nats://localhost:5222

view raw start_two_nats_seed_servers.sh hosted with ❤ by GitHub

• Start three cluster servers (server A, B, C):

	# Start NATS cluster server A
	./nats-server -p -1 --cluster nats://0.0.0.0:-1 --routes nats://localhost:5222,nats://localhost:5223
	# Start NATS cluster server B
	./nats-server -p -1 --cluster nats://0.0.0.0:-1 --routes nats://localhost:5222,nats://localhost:5223
	# Start NATS cluster server C
	./nats-server -p -1 --cluster nats://0.0.0.0:-1 --routes nats://localhost:5222,nats://localhost:5223

view raw start_three_nats_cluster_servers.sh hosted with ❤ by GitHub

Voila! You get the cluster running, now it's time test it out:

• Start subscriber and publisher:

	# Start nats-sub to one of the cluster server
	./nats-sub -s nats://localhost:36113 test-topic
	# Publish (nats-pub) to any of the cluster server
	./nats-pub -s nats://localhost:34416 test-topic "This is the message"

view raw start_nats_sub_and_nats_pub.sh hosted with ❤ by GitHub