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.
57 lines
2.8 KiB
TypeScript
57 lines
2.8 KiB
TypeScript
// lavinmq's provisioner — the adapter that makes lavinmq a provider of the mesh `amqp` interface.
|
|
// The reconcile loop, the contributions file, and reading the mesh's minted password are the sdk
|
|
// harness's; this writes only the per-service half: how lavinmq creates and removes a consumer's own
|
|
// broker (novox/hq ADR 0039/0040/0048).
|
|
//
|
|
// The `amqp` interface: a consumer connects as `as` with the password the mesh minted, to a vhost
|
|
// named for that same login — its own message broker, isolated from every other consumer's by the
|
|
// vhost boundary. It is a broker of its own, not a shared account on the mesh's control-plane broker.
|
|
//
|
|
// **The login and password are the mesh's, not the provisioner's (novox/hq ADR 0048).** The mesh
|
|
// derives the login and hands it to both ends so they agree, and mints the password and delivers a
|
|
// copy to each. lavinmq creates exactly that user with exactly that password — a name or password the
|
|
// provisioner invented is one the consumer could never present.
|
|
//
|
|
// Vhost-per-login is the isolation model, the exact analog of postgres's database-per-login: the
|
|
// consumer owns one vhost, named for its login, and a user with full rights on that vhost and no
|
|
// rights anywhere else. lavinmq enforces it — a user with no permission on `/` is refused the moment
|
|
// it opens that vhost (`NOT_ALLOWED`), so a login is a broker the consumer alone can reach.
|
|
|
|
import { runProvisioner, type Provision } from "@novox/mesh-sdk/provisioner";
|
|
import { emit } from "@novox/mesh-sdk/events";
|
|
import { LavinmqClient } from "../client.js";
|
|
|
|
const lavinmq = LavinmqClient.fromEnv();
|
|
|
|
/** Emit a lifecycle event without letting a broker hiccup fail the provisioning itself. */
|
|
async function announce(type: string, body: Record<string, string>): Promise<void> {
|
|
try {
|
|
await emit(type, body);
|
|
} catch (err) {
|
|
console.error(`[provisioner:amqp] emit ${type} failed: ${err}`);
|
|
}
|
|
}
|
|
|
|
runProvisioner("amqp", {
|
|
async create(p: Provision): Promise<void> {
|
|
// The vhost and the user share the consumer's login, so one cannot reach another's broker.
|
|
await lavinmq.waitReady();
|
|
await lavinmq.createConsumer(p.as, p.password);
|
|
await announce("module.lavinmq.amqp.provisioned", {
|
|
consumer: p.consumer ?? "",
|
|
user: p.as,
|
|
vhost: p.as,
|
|
});
|
|
},
|
|
|
|
async remove(p: { as: string }): Promise<void> {
|
|
await lavinmq.removeConsumer(p.as);
|
|
await announce("module.lavinmq.amqp.deprovisioned", { user: p.as, vhost: p.as });
|
|
},
|
|
// Asked every minute by the harness: whether the backend still holds this consumer exactly as
|
|
// the mesh gave it, so a login lost behind the provisioner's back is made again (novox/hq issue 120).
|
|
async holds(p: Provision): Promise<boolean> {
|
|
return lavinmq.holdsConsumer(p.as, p.password);
|
|
},
|
|
});
|