events: the assigned audit-logger, proven in the lab (ADR 0048)

test/integration/assigned-audit.test.ts raises a node into a mesh, assigns it
the audit-logger through the control plane, and asserts the mesh delivered a
scoped amqps account (not the broker's own), the host ran the container, and an
emitted event reached the trail — the delivered credential authenticating is
the proof. scenarios/audit-node.yml is the lean single-node bed that stocks the
runtime image. Passes 1/1 against the real lab.

Claude-Session: https://claude.ai/code/session_01LrgweAeERJYBg88c5cKDzF

scenarios/audit-node.yml

@@ -0,0 +1,30 @@
+# One machine that becomes a mesh and then assigns itself the audit logger.
+#
+# The substrate is first-node's — a store, a broker, the control plane — and one module image on
+# top: the tool runtime carrying the audit-logger (mesh-catalog). The node enrols itself and the
+# mesh assigns it the audit logger, so its events account is one the mesh delivered, not the
+# broker's own (novox/hq ADR 0048).
+scenario: audit-node
+
+segments:
+  hosting:
+    kind: public
+    cidr: [192.0.2.0/24]
+
+machines:
+  anchor:
+    at: { segment: hosting, address: [192.0.2.10] }
+    inbound: allow
+    memory: 3GiB
+    cpus: 2
+
+images:
+  - postgres:17-alpine
+  - cloudamqp/lavinmq:latest
+  - mesh-control:development
+  # The tool runtime with the audit-logger, built by scripts/build-runtime-image.sh into the local
+  # daemon and stocked into the scenario's own registry, which is where the host pulls it from.
+  - mesh-runtime-audit:development
+
+place:
+  all: [host, runtime]

scripts/build-runtime-image.sh

@@ -19,7 +19,7 @@ MESH_TOOLS="${MESH_TOOLS:-$ROOT/mesh-tools}"
 MESH_SDK="${MESH_SDK:-$ROOT/mesh-sdk}"
 MESH_CATALOG="${MESH_CATALOG:-$ROOT/mesh-catalog}"
 AUDIT="$MESH_CATALOG/modules/audit-logger"
-TAG="${RUNTIME_TAG:-mesh-runtime-audit:lab}"
+TAG="${RUNTIME_TAG:-mesh-runtime-audit:development}"
 BASE="${RUNTIME_BASE:-node:22-bookworm-slim}"
 
 echo "building $TAG from:"

test/integration/assigned-audit.test.ts

@@ -0,0 +1,221 @@
+/**
+ * The mesh assigns the audit logger, and it consumes over an account the mesh delivered.
+ *
+ * events.test.ts proves the events path with the audit logger started by hand. This proves the
+ * whole of novox/hq ADR 0048: the module is assigned through the control plane, the mesh issues it
+ * a broker account scoped to what it consumes, seals it to the machine, and the host runs it as a
+ * container that connects over amqps with that account — never the broker's own. The trail filling
+ * is the proof the delivered, scoped credential authenticated and the subscription bound.
+ *
+ * It needs the host binary, the substrate bundle, and the runtime image stocked by the scenario:
+ *
+ *   MESH_LAB_HOST_BINARY=.../mesh-host
+ *   MESH_LAB_BUNDLE=.../examples/substrate-first-node.lock
+ *   scripts/build-runtime-image.sh builds mesh-runtime-audit:development into the local daemon,
+ *   which scenarios/audit-node.yml stocks — so no MESH_LAB_RUNTIME here; the host pulls it.
+ */
+
+import { test, before, after } from "node:test";
+import assert from "node:assert/strict";
+import { existsSync, readFileSync } from "node:fs";
+import { loadScenario } from "../../src/declaration/parse.ts";
+import { raise } from "../../src/lifecycle/raise.ts";
+import { destroy, exec } from "../../src/lifecycle/operate.ts";
+import { hostBinaryPath, HOST_PATH } from "../../src/lifecycle/place.ts";
+import { labIsUsable, destroyAll } from "./harness.ts";
+
+const capability = await labIsUsable();
+const binary = hostBinaryPath();
+const bundle = process.env["MESH_LAB_BUNDLE"] ?? "";
+
+const skip = !capability.usable
+  ? `lab not usable: ${capability.why}`
+  : !binary || !existsSync(binary)
+    ? "MESH_LAB_HOST_BINARY is not set to a built mesh-host"
+    : !bundle || !existsSync(bundle)
+      ? "MESH_LAB_BUNDLE is not set to a substrate bundle (mesh-host examples/)"
+      : false;
+
+const SCENARIO = "audit-node";
+const MACHINE = "anchor";
+
+let instanceId = "";
+/** What the scenario's registry serves, by digest. */
+let stocked: string[] = [];
+
+function quote(s: string): string {
+  return `'${s.replaceAll("'", `'\\''`)}'`;
+}
+
+async function on(command: string, timeoutMs?: number): Promise<{ out: string; ok: boolean }> {
+  const { stdout } = await exec(instanceId, MACHINE, [
+    "sh", "-c", `exec 2>&1\n${command}\necho "__exit=$?"`,
+  ], timeoutMs);
+  const marker = stdout.lastIndexOf("__exit=");
+  if (marker < 0) return { out: stdout, ok: false };
+  return { out: stdout.slice(0, marker), ok: stdout.slice(marker + 7).trim() === "0" };
+}
+
+async function must(command: string, timeoutMs?: number): Promise<string> {
+  const { out, ok } = await on(command, timeoutMs);
+  if (!ok) throw new Error(`${MACHINE}: ${command}\n${out}`);
+  return out;
+}
+
+/** The control plane, a container on the node. */
+async function mesh(command: string, timeoutMs?: number): Promise<string> {
+  return must(`docker exec mesh-control /mesh-control ${command}`, timeoutMs);
+}
+
+/** The pinned reference for one of the scenario's images, by repository. */
+function pinned(repository: string): string {
+  const found = stocked.find((r) => r.slice(r.indexOf("/") + 1, r.indexOf("@")) === repository);
+  assert.ok(found, `the scenario stocks no ${repository}; it serves ${stocked.join(", ")}`);
+  return found;
+}
+
+/** The substrate bundle, its image references pointed at this scenario's own registry. */
+function bundleFor(images: string[]): string {
+  let text = readFileSync(bundle, "utf8");
+  for (const ref of images) {
+    const repository = ref.slice(ref.indexOf("/") + 1, ref.indexOf("@"));
+    const escaped = repository.replaceAll("/", "\\/").replaceAll(".", "\\.");
+    text = text.replaceAll(new RegExp(`[A-Za-z0-9_.:-]+\\/${escaped}@sha256:[0-9a-f]+`, "g"), ref);
+  }
+  return text;
+}
+
+function tokenFrom(said: string): string {
+  const found = said.split("\n").map((l) => l.trim()).find((l) => l.length > 100 && !l.includes(" "));
+  assert.ok(found, `no token in:\n${said}`);
+  return found;
+}
+
+async function settled(withinMs = 480_000): Promise<void> {
+  const until = Date.now() + withinMs;
+  let last = "";
+  while (Date.now() < until) {
+    const asked = await on(`docker exec mesh-control /mesh-control status --json`);
+    if (asked.ok) {
+      try {
+        const state = JSON.parse(asked.out) as {
+          wrong: { node: string; outcome: string }[];
+          waiting: { node: string }[];
+          reported: { node: string; outcome: string; current: boolean }[];
+        };
+        const bad = state.wrong.find((w) => w.node === MACHINE);
+        if (bad) throw new Error(`${MACHINE} did not apply what it was sent: ${bad.outcome}\n${asked.out}`);
+        const word = state.reported.find((r) => r.node === MACHINE);
+        if (!state.waiting.some((w) => w.node === MACHINE) && word?.outcome === "applied" && word.current) return;
+        last = asked.out;
+      } catch (err) {
+        if (err instanceof Error && err.message.includes("did not apply")) throw err;
+        last = asked.out;
+      }
+    }
+    await new Promise((r) => setTimeout(r, 5000));
+  }
+  throw new Error(`${MACHINE} never caught up within ${Math.round(withinMs / 1000)}s. Last:\n${last}`);
+}
+
+before(async () => {
+  if (skip) return;
+
+  const raised = await raise(loadScenario(`scenarios/${SCENARIO}.yml`), {
+    onProgress: (m) => console.log(`raise: ${m}`),
+  });
+  instanceId = raised.instanceId;
+  stocked = raised.images;
+
+  // Raise the substrate — store, broker, control — from the bundle.
+  await must(`cat > /tmp/substrate.lock <<'MESHBUNDLE'\n${bundleFor(raised.images)}\nMESHBUNDLE`);
+  await must(`${HOST_PATH} apply /tmp/substrate.lock`, 600_000);
+  const up = await must(`docker ps --format '{{.Names}}'`);
+  for (const c of ["mesh-store", "mesh-broker", "mesh-control"]) {
+    assert.match(up, new RegExp(c), `the substrate did not raise ${c}:\n${up}`);
+  }
+
+  // The node joins its own mesh, so it is a node the mesh can assign to, and start the host so it
+  // applies what it is pushed.
+  await mesh(`node add ${MACHINE}`);
+  const token = tokenFrom(await mesh(`token issue --node ${MACHINE}`));
+  await must(`${HOST_PATH} enrol --token ${quote(token)}`);
+  await must(`nohup ${HOST_PATH} run > /var/log/mesh-host.log 2>&1 & sleep 3`);
+}, { timeout: 1_800_000 });
+
+after(async () => {
+  if (instanceId) await destroy(instanceId);
+  await destroyAll(`${SCENARIO}-`);
+}, { timeout: 600_000 });
+
+test("the mesh assigns the audit logger, and it consumes over the account the mesh delivered", {
+  skip, timeout: 900_000,
+}, async () => {
+  // The assigned-module manifest (mesh-catalog), its runtime image the digest this registry serves.
+  const manifest = JSON.stringify({
+    module: "audit-logger",
+    version: "1",
+    consumes: ["#"],
+    "own-secrets": { broker: "/var/lib/audit-logger/broker" },
+    resources: [
+      { id: "state", type: "directory", path: "/var/lib/audit-logger", mode: "0700" },
+      { id: "trail", type: "directory", path: "/var/lib/audit-logger/trail", mode: "0700" },
+      {
+        id: "run", type: "container", name: "mesh-audit-logger", image: pinned("mesh-runtime-audit"),
+        network: "host",
+        volumes: [
+          "/var/lib/audit-logger/broker:/run/secrets/broker:ro",
+          "/var/lib/audit-logger/trail:/trail",
+        ],
+        env: { MESH_BROKER_FILE: "/run/secrets/broker", AUDIT_LOG: "/trail/audit.log" },
+      },
+    ],
+  });
+  await must(`printf %s ${quote(manifest)} > /tmp/audit.json && docker cp /tmp/audit.json mesh-control:/audit.json`);
+  await mesh("module add /audit.json");
+
+  // The mesh issues its scoped account and seals it to this machine, then assigns and pushes it.
+  const issued = await mesh(`module issue audit-logger --node ${MACHINE}`);
+  assert.match(issued, /scoped to what it emits and consumes/, issued);
+  await mesh(`assign ${MACHINE} audit-logger`);
+  await mesh(`push ${MACHINE}`);
+  await settled();
+
+  // The container the mesh started is running.
+  const running = await must(`docker ps --format '{{.Names}}'`);
+  assert.match(running, /mesh-audit-logger/,
+    `the audit logger was assigned and is not running:\n${(await on(`tail -30 /var/log/mesh-host.log`)).out}`);
+
+  // The credential on disk is the scoped account over amqps, sealed — not the broker's own.
+  const credential = await must(`cat /var/lib/audit-logger/broker`);
+  assert.match(credential, /"url":"amqps:\/\/anchor-audit-logger:/, `not the scoped account:\n${credential}`);
+  assert.doesNotMatch(credential, /guest:guest/, "the audit logger holds the broker's own account");
+  assert.match(credential, /"fingerprint":"(sha256:)?[0-9a-f]{64}"/, "no fingerprint to pin the broker");
+
+  // An event, emitted by a probe over the bootstrap account (the audit logger's own may not emit).
+  await must(
+    `docker run --rm --network host -e MESH_BROKER_URL=amqp://guest:guest@127.0.0.1:5672/ ` +
+      `-e MESH_MODULE=probe -e MESH_NODE=${MACHINE} ${pinned("mesh-runtime-audit")} ` +
+      `emit module.probe.site.created '{"domain":"my-app"}'`,
+  );
+
+  // It reaches the trail the assigned container writes — proof its delivered account authenticated.
+  let line: Record<string, unknown> | undefined;
+  const until = Date.now() + 60_000;
+  while (Date.now() < until) {
+    const raw = await must(`cat /var/lib/audit-logger/trail/audit.log 2>/dev/null || true`);
+    line = raw.split("\n").map((l) => l.trim()).filter(Boolean).map((l) => JSON.parse(l) as Record<string, unknown>)
+      .find((e) => e.type === "module.probe.site.created");
+    if (line) break;
+    await new Promise((r) => setTimeout(r, 3000));
+  }
+  assert.ok(line, `the event never reached the trail:\n${(await on(`docker logs mesh-audit-logger 2>&1 | tail -20`)).out}`);
+  assert.equal(line.source, "probe");
+  assert.deepEqual(line.body, { domain: "my-app" });
+
+  // And the account the mesh made for it is a real one on the broker — the trail above already
+  // proved it authenticated and read its queue. That it reaches no further than its own queue is
+  // the scope CreateModuleAccount applies, checked as patterns in mesh-control's own tests.
+  const users = await must(`docker exec mesh-broker lavinmqctl list_users 2>&1`);
+  assert.match(users, /anchor-audit-logger/, `the scoped account is not on the broker:\n${users}`);
+});