jochen
0cb0f814b4
holds() for postgres, mssql, mongodb, minio, lavinmq, mosquitto, mailu and gitea, so the harness makes again a login the backend lost (hq issue 120). Each checks the mesh's password as the consumer presents it, or compares it read-only, and returns false only when the backend says the credential is absent or wrong; an unreachable backend throws.
52 lines
2.4 KiB
TypeScript
52 lines
2.4 KiB
TypeScript
// mosquitto's provisioner — the adapter that makes mosquitto a provider of the mesh `mqtt-topic`
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// interface. The reconcile loop, the contributions file, and reading the mesh's minted password are
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// the sdk harness's; this writes only the per-service half: how mosquitto creates and removes a
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// per-consumer MQTT client (novox/hq ADR 0039/0040/0048).
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//
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// The `mqtt-topic` interface: a consumer connects as `as` with the password the mesh minted, and
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// publishes and subscribes under `<as>/#`, isolated from every other consumer by a Dynamic Security
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// role scoped to exactly that subtree.
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//
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// **The login and password are the mesh's, not the provisioner's (ADR 0048).** The mesh derives the
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// login and hands it to both ends so they agree, and mints the password and delivers a copy to each.
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// mosquitto creates exactly that client with exactly that password — a name or password the
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// provisioner invented is one the consumer could never present.
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import { runProvisioner, type Provision } from "@novox/mesh-sdk/provisioner";
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import { emit } from "@novox/mesh-sdk/events";
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import { MosquittoClient } from "../client.js";
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const mosquitto = MosquittoClient.fromEnv();
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/** Emit a lifecycle event without letting a broker hiccup fail the provisioning itself. */
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async function announce(type: string, body: Record<string, string>): Promise<void> {
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try {
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await emit(type, body);
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} catch (err) {
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console.error(`[provisioner:mqtt-topic] emit ${type} failed: ${err}`);
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}
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}
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runProvisioner("mqtt-topic", {
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async create(p: Provision): Promise<void> {
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// The topic subtree is scoped to the consumer's own login, so one cannot read another's topics.
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const topicPrefix = p.as;
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await mosquitto.createScopedClient(p.as, p.password, topicPrefix);
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await announce("module.mosquitto.topic.provisioned", {
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consumer: p.consumer ?? "",
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username: p.as,
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topicPrefix,
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});
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},
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async remove(p: { as: string }): Promise<void> {
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await mosquitto.deleteScopedClient(p.as);
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await announce("module.mosquitto.topic.deprovisioned", { username: p.as });
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},
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// Asked every minute by the harness: whether the backend still holds this consumer exactly as
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// the mesh gave it, so a login lost behind the provisioner's back is made again (novox/hq issue 120).
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async holds(p: Provision): Promise<boolean> {
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return mosquitto.holdsClient(p.as, p.password);
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},
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});
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