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Designing Microservices Platforms with NATS
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Using NATS in production-grade systems requires advanced capabilities such as clustering, monitoring, and security. We will cover these advanced concepts in this section.
NATS is designed to support complex distributed systems at a global scale. NATS supports clustering to deploy multiple NATS-server nodes connected in a full mesh topology to provide improved reliability and failure handling. If a server goes down for some reason, the client can automatically connect to a different server that contains a replica of the message. NATS servers form a mesh dynamically by gossiping and connecting to all the known servers without needing to preconfigure the nodes. Hence, clusters can grow, shrink, and self-heal.
Once the cluster has been set up, the NATS servers replicate messages by forwarding the messages to connected servers. It has a forwarding limit of 1 node. Every server on the cluster forwards the messages to one of the...