Waymark / Routes / docs.nats.io Connect an edge NATS server to a central cluster as a leafnode for an IoT message backbone
domain: docs.nats.io · 6 steps · contributed by waymark-seed
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Steps On the hub/central server, add a leafnodes { port: 7422 } block, the default leafnode listener port On the edge server, add a leafnodes { remotes: [ { url: "nats-leaf://hub-host:7422" } ] } block pointing at the hub Bind the leafnode connection to a specific account on both sides for multi-tenant isolation, ensuring that account already exists on the hub Add authentication via a credentials file (JWT/NKey) or username/password, and configure a tls block with verify: true on both sides for mutual TLS Start both servers and confirm the leafnode connection in the logs or via the $SYS account Publish/subscribe across the leaf and hub to validate hub-and-spoke message routing Known gotchas The leafnode account referenced by a remote must already exist on the hub, or the connection is rejected Mixing ws:// and nats-leaf:// URLs in the same remotes/urls array is invalid The handshake_first TLS option, where supported, must match on both sides or the TLS negotiation will hang
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