37 lines
1.9 KiB
Markdown
37 lines
1.9 KiB
Markdown
# 3. Central Verae NATS.IO 3-server cluster
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All durable messaging for this product is **NATS JetStream**, not Zapier queues and not a public TCP API.
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## Cluster
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Three `nats-server -js` nodes form the Verae cluster (routes between them, JetStream replication). Clients (middleware, poller, aggregator, WORM, tree nodes, and any new process cloned from `verae-nats-process`) connect with a **cluster URL list**, for example:
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```text
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nats://127.0.0.1:4222,nats://127.0.0.1:4223,nats://127.0.0.1:4224
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```
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On a given machine the listener stays on **loopback** (or a private interface). Operators reach it with `scripts/nats-tunnel.sh` / `ssh -L 14222:127.0.0.1:4222`. **Do not bind 4222 on `0.0.0.0` without auth.**
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Today’s NS1 box (`NS1.GEORGELAMBERT.ORG`, `70.88.205.138`) already runs JetStream on `127.0.0.1:4222`. The **target** is three clustered nodes so losing one server does not lose the stream. Fleet SSH hosts (`ns1`, later `lan-134`) run **workers**, not extra public NATS listeners.
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## Who may connect
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| Allowed | Forbidden |
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|---------|-----------|
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| verae-middleware, fleet workers, WORM, tree nodes, `verae-nats-process` clones | Zapier cloud, browsers, zappier-edge |
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## Address families already in use
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| Address | Kind | Notes |
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|---------|------|--------|
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| `verae.zapier.jobs.watch` | work queue | poller |
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| `verae.zapier.jobs.events` | events | wait + webhooks |
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| `verae.zapier.webhooks.deliver` | work queue | HTTPS to Zapier REST Hook |
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| `verae.zapier.usage` | optional | metering |
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| `verae.archive.put` | JetStream | splitter / merkle builder |
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| `verae.archive.query` | **broadcast** (no queue group) | every WORM and tree node |
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| `verae.archive.reply.<correlationId>` | replies | **only on bloom hit** |
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New functions get new `verae.<area>.<resource>.<action>` addresses — see [06-address-routing.md](06-address-routing.md).
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