feat(health-checks): implement health check IP toggling and configuration updates

- Added functionality to toggle individual IPs for services, allowing for dynamic management of IP health status.
- Enhanced the health check configuration in the UI, enabling users to set parameters directly from the settings page.
- Updated service views to include IP health tracking, improving visibility into the status of each IP associated with a service.
- Refactored relevant components to support the new IP toggling feature, ensuring a seamless user experience.

This commit significantly enhances the health management capabilities of services, providing users with more control over IP configurations and health monitoring.

apps/api/src/app.ts

@@ -7,7 +7,6 @@ import {
 } from "@fastify/type-provider-zod";
 import type { AppConfig } from "./config.js";
 import { loadConfig } from "./config.js";
-import { repos } from "@cfdm/db";
 import authPlugin from "./plugins/auth.js";
 import cfClientPlugin from "./plugins/cf-client.js";
 import { requireAuth } from "./plugins/auth.js";
@@ -34,8 +33,10 @@ import { settingsRoutes } from "./routes/settings.js";
 import { integrationsVpsTrackerRoutes } from "./routes/integrations-vps-tracker.js";
 import { auditRoutes } from "./routes/audit.js";
 import * as certificateService from "./services/certificate-service.js";
-import * as healthCheckService from "./services/health-check-service.js";
-import * as serviceConfigService from "./services/service-config-service.js";
+import {
+  createHealthCheckTask,
+  scheduleHealthCheckJob,
+} from "./services/health-check-scheduler.js";
 import { AsyncTask, CronJob } from "toad-scheduler";
 
 export interface BuildAppOptions {
@@ -125,71 +126,11 @@ export async function buildApp(opts: BuildAppOptions = {}) {
       ),
     );
 
-    const healthTask = new AsyncTask(
-      "health-check",
-      async () => {
-        const thresholds = {
-          degradedFailures: config.healthDegradedFailures,
-          downFailures: config.healthDownFailures,
-          latencyWarnMs: config.healthLatencyWarnMs,
-          successRecoveries: config.healthSuccessRecoveries,
-        };
-        const n = await healthCheckService.runAllChecks(app.db, {
-          thresholds,
-          probeGapMs: config.healthProbeGapMs,
-          onStatusChange: async (target, prev, next) => {
-            try {
-              const label =
-                next === "up"
-                  ? "OK"
-                  : next === "degraded"
-                    ? "Slow"
-                    : next === "down"
-                      ? "Down"
-                      : "—";
-              repos.insertNotificationLog(
-                app.db,
-                "ip_health",
-                target.scope,
-                target.ref_id,
-                `${target.hostname || target.ip}: ${label}`,
-                `IP ${target.ip}: ${prev ?? "—"} → ${label}`,
-              );
-              await serviceConfigService.reconcileDnsForTarget(
-                app.db,
-                app.cf,
-                target.scope,
-                target.ref_id,
-              );
-            } catch (err) {
-              app.log.warn(
-                { err, scope: target.scope, refId: target.ref_id },
-                "health-check reconcile failed",
-              );
-            }
-          },
-        });
-        const monitors = await healthCheckService.runDomainMonitors(
-          app.db,
-          thresholds,
-        );
-        app.log.info(
-          { checked: n, monitors },
-          "health check completed",
-        );
-      },
-      (err) => {
-        app.log.warn({ err }, "health check failed");
-      },
-    );
-
-    app.scheduler.addCronJob(
-      new CronJob(
-        { cronExpression: config.healthCheckCron },
-        healthTask,
-        { preventOverrun: true },
-      ),
-    );
+    const healthTask = createHealthCheckTask(app, config);
+    scheduleHealthCheckJob(app, config, healthTask);
+    app.decorate("reloadHealthCheckJob", () => {
+      scheduleHealthCheckJob(app, config, healthTask);
+    });
   }
 
   return app;

apps/api/src/routes/services.ts

@@ -4,6 +4,7 @@ import {
   changeDomainSchema,
   createServiceNodeSchema,
   reorderServicesSchema,
+  toggleServiceIpSchema,
   updateServiceConfigSchema,
   updateServiceNodeSchema,
 } from "@cfdm/shared";
@@ -191,4 +192,26 @@ export async function serviceRoutes(app: FastifyInstance) {
       body.enabled,
     );
   });
+
+  app.patch("/services/:id/ips/toggle", async (request) => {
+    const { id } = request.params as { id: string };
+    const body = toggleServiceIpSchema.parse(request.body);
+    const view = await serviceConfig.toggleServiceIp(
+      request.server.db,
+      request.server.cf,
+      Number(id),
+      body.ip,
+      body.enabled,
+    );
+    recordAudit(request.server, request, {
+      action: "service.ip.toggle",
+      targetType: "app_resource",
+      targetId: String(id),
+      summary: body.enabled
+        ? `Включён IP ${body.ip} сервиса «${view.name}»`
+        : `Выключен IP ${body.ip} сервиса «${view.name}»`,
+      details: { ip: body.ip, enabled: body.enabled },
+    });
+    return view;
+  });
 }

apps/api/src/routes/settings.ts

@@ -5,15 +5,46 @@ import {
   updateAppSettings,
 } from "@cfdm/db";
 import { pingVpsTracker } from "../services/vps-tracker-sync.js";
+import { AppError } from "../errors.js";
+import {
+  assertValidHealthCron,
+  healthEngineFallbacksFromConfig,
+} from "../services/health-check-scheduler.js";
 
 export async function settingsRoutes(app: FastifyInstance) {
   app.get("/settings", async (request) => {
-    return getAppSettings(request.server.db);
+    return getAppSettings(
+      request.server.db,
+      healthEngineFallbacksFromConfig(request.server.config),
+    );
   });
 
   app.patch("/settings", async (request) => {
-    const body = appSettingsPatchSchema.parse(request.body);
-    return updateAppSettings(request.server.db, body);
+    const parsed = appSettingsPatchSchema.safeParse(request.body);
+    if (!parsed.success) {
+      throw AppError.validation(
+        parsed.error.issues[0]?.message ?? "некорректные настройки",
+      );
+    }
+    const body = parsed.data;
+    if (body.healthCheckCron) {
+      assertValidHealthCron(body.healthCheckCron);
+    }
+    const fallbacks = healthEngineFallbacksFromConfig(request.server.config);
+    const current = getAppSettings(request.server.db, fallbacks);
+    const nextDegraded =
+      body.healthDegradedFailures ?? current.healthDegradedFailures;
+    const nextDown = body.healthDownFailures ?? current.healthDownFailures;
+    if (nextDown < nextDegraded) {
+      throw AppError.validation(
+        "ошибок до down не меньше, чем до degraded",
+      );
+    }
+    const next = updateAppSettings(request.server.db, body, fallbacks);
+    if (body.healthCheckCron !== undefined) {
+      request.server.reloadHealthCheckJob?.();
+    }
+    return next;
   });
 
   app.post("/settings/vps-tracker/test", async (request) => {

apps/api/src/services/health-check-scheduler.ts

@@ -0,0 +1,134 @@
+import type { FastifyInstance } from "fastify";
+import { AsyncTask, CronJob } from "toad-scheduler";
+import {
+  getAppSettings,
+  type HealthEngineFallbacks,
+} from "@cfdm/db";
+import { repos } from "@cfdm/db";
+import type { AppConfig } from "../config.js";
+import { AppError } from "../errors.js";
+import * as healthCheckService from "./health-check-service.js";
+import * as serviceConfigService from "./service-config-service.js";
+
+declare module "fastify" {
+  interface FastifyInstance {
+    reloadHealthCheckJob?: () => void;
+  }
+}
+
+export const HEALTH_CHECK_JOB_ID = "health-check";
+
+export function healthEngineFallbacksFromConfig(
+  config: AppConfig,
+): HealthEngineFallbacks {
+  return {
+    healthCheckCron: config.healthCheckCron,
+    healthDegradedFailures: config.healthDegradedFailures,
+    healthDownFailures: config.healthDownFailures,
+    healthLatencyWarnMs: config.healthLatencyWarnMs,
+    healthSuccessRecoveries: config.healthSuccessRecoveries,
+  };
+}
+
+export function assertValidHealthCron(expr: string): void {
+  const cronExpression = expr.trim();
+  const parts = cronExpression.split(/\s+/).filter(Boolean);
+  if (parts.length < 5 || parts.length > 6) {
+    throw AppError.validation("некорректное cron-выражение");
+  }
+  try {
+    const job = new CronJob(
+      { cronExpression },
+      new AsyncTask("validate-cron", async () => undefined),
+      { id: "validate-cron" },
+    );
+    job.stop();
+  } catch {
+    throw AppError.validation("некорректное cron-выражение");
+  }
+}
+
+export function createHealthCheckTask(
+  app: FastifyInstance,
+  config: AppConfig,
+): AsyncTask {
+  const fallbacks = healthEngineFallbacksFromConfig(config);
+  return new AsyncTask(
+    HEALTH_CHECK_JOB_ID,
+    async () => {
+      const settings = getAppSettings(app.db, fallbacks);
+      const thresholds = {
+        degradedFailures: settings.healthDegradedFailures,
+        downFailures: settings.healthDownFailures,
+        latencyWarnMs: settings.healthLatencyWarnMs,
+        successRecoveries: settings.healthSuccessRecoveries,
+      };
+      const n = await healthCheckService.runAllChecks(app.db, {
+        thresholds,
+        probeGapMs: config.healthProbeGapMs,
+        onStatusChange: async (target, prev, next) => {
+          try {
+            const label =
+              next === "up"
+                ? "OK"
+                : next === "degraded"
+                  ? "Slow"
+                  : next === "down"
+                    ? "Down"
+                    : "—";
+            repos.insertNotificationLog(
+              app.db,
+              "ip_health",
+              target.scope,
+              target.ref_id,
+              `${target.hostname || target.ip}: ${label}`,
+              `IP ${target.ip}: ${prev ?? "—"} → ${label}`,
+            );
+            await serviceConfigService.reconcileDnsForTarget(
+              app.db,
+              app.cf,
+              target.scope,
+              target.ref_id,
+            );
+          } catch (err) {
+            app.log.warn(
+              { err, scope: target.scope, refId: target.ref_id },
+              "health-check reconcile failed",
+            );
+          }
+        },
+      });
+      const monitors = await healthCheckService.runDomainMonitors(
+        app.db,
+        thresholds,
+      );
+      app.log.info({ checked: n, monitors }, "health check completed");
+    },
+    (err) => {
+      app.log.warn({ err }, "health check failed");
+    },
+  );
+}
+
+export function scheduleHealthCheckJob(
+  app: FastifyInstance,
+  config: AppConfig,
+  task: AsyncTask,
+): void {
+  const scheduler = app.scheduler;
+  if (!scheduler) return;
+  if (scheduler.existsById(HEALTH_CHECK_JOB_ID)) {
+    scheduler.removeById(HEALTH_CHECK_JOB_ID);
+  }
+  const settings = getAppSettings(
+    app.db,
+    healthEngineFallbacksFromConfig(config),
+  );
+  scheduler.addCronJob(
+    new CronJob(
+      { cronExpression: settings.healthCheckCron },
+      task,
+      { preventOverrun: true, id: HEALTH_CHECK_JOB_ID },
+    ),
+  );
+}

apps/api/src/services/service-config-service.ts

@@ -242,7 +242,11 @@ async function collectKnownZones(
 
 async function buildView(db: Db, serviceId: number): Promise<ServiceView> {
   const service = repos.getService(db, serviceId);
-  const ips = repos.listServiceIps(db, serviceId);
+  const ipRows = repos.listServiceIpRows(db, serviceId);
+  const ips = ipRows.map((row) => row.ip);
+  const ip_enabled = Object.fromEntries(
+    ipRows.map((row) => [row.ip, row.enabled]),
+  );
   const bindings = repos.listBindingsByService(db, serviceId);
 
   const domainViews = bindings.map((binding) => {
@@ -304,6 +308,7 @@ async function buildView(db: Db, serviceId: number): Promise<ServiceView> {
     created_at: service.created_at,
     updated_at: service.updated_at,
     ips,
+    ip_enabled,
     domains: domainViews,
     health_status: "unknown",
     health_latency_ms: null,
@@ -384,7 +389,7 @@ export async function listGroupViews(db: Db): Promise<ServiceGroupsResponse> {
 
   const groupViews = groupViewsRaw.map((group) => {
     const services = group.services.map(
-      (s) => healthById.get(s.id) ?? { ...s, health_status: "unknown" as const, health_latency_ms: null, ip_health: [] },
+      (s) => healthById.get(s.id) ?? { ...s, health_status: "unknown" as const, health_latency_ms: null, ip_health: [], ip_enabled: {} },
     );
     const groupScopeHealth = groupHealthById.get(group.id);
     // Only enabled services feed the group badge — a disabled service with a
@@ -414,6 +419,7 @@ export async function listGroupViews(db: Db): Promise<ServiceGroupsResponse> {
         health_status: "unknown" as const,
         health_latency_ms: null,
         ip_health: [],
+        ip_enabled: {},
       },
   );
 
@@ -1345,6 +1351,59 @@ export async function toggleService(
   return enabledView!;
 }
 
+export async function toggleServiceIp(
+  db: Db,
+  cf: CloudflareClient,
+  serviceId: number,
+  ip: string,
+  enabled: boolean,
+): Promise<ServiceView> {
+  repos.getService(db, serviceId);
+  const pool = repos.listServiceIps(db, serviceId);
+  if (!pool.includes(ip)) {
+    throw AppError.validation(`IP ${ip} не входит в пул адресов сервиса`);
+  }
+
+  repos.setServiceIpEnabled(db, serviceId, ip, enabled);
+  const node = repos
+    .listNodes(db, serviceId)
+    .find((entry) => entry.address === ip);
+  if (node) {
+    repos.updateNode(db, node.id, { enabled });
+  }
+
+  const bindings = repos.listBindingsByService(db, serviceId);
+  for (const binding of bindings) {
+    if (binding.cname_target?.trim()) continue;
+    const current = repos.listBindingIpsWithMeta(db, binding.id);
+    const hasIp = current.some((entry) => entry.ip === ip);
+    if (enabled && !hasIp) {
+      repos.replaceBindingIpsWithMeta(db, binding.id, [
+        ...current,
+        { ip, weight: 1, priority: 1 },
+      ]);
+      continue;
+    }
+    if (!enabled && hasIp) {
+      repos.replaceBindingIpsWithMeta(
+        db,
+        binding.id,
+        current.filter((entry) => entry.ip !== ip),
+      );
+    }
+  }
+
+  const service = repos.getService(db, serviceId);
+  if (shouldPushDns(db, service)) {
+    await syncServiceBindingsToDns(db, cf, serviceId);
+    await syncGroupDomainForService(db, cf, serviceId);
+  }
+  void syncServiceToVpsTracker(db, serviceId);
+
+  const [view] = attachServiceHealth(db, [await buildView(db, serviceId)]);
+  return view!;
+}
+
 export async function toggleGroup(
   db: Db,
   cf: CloudflareClient,

apps/api/src/services/vps-tracker-sync.ts

@@ -43,8 +43,9 @@ function resolveIpsLocally(
   const binding = index.byFqdn.get(key);
   if (!binding) return [];
 
-  if (binding.target_ips.some(isIpLiteral)) {
-    return binding.target_ips.filter(isIpLiteral);
+  const ips = (binding.target_ips ?? []).filter(isIpLiteral);
+  if (ips.length > 0) {
+    return ips;
   }
 
   const cname = binding.cname_target?.trim();
@@ -79,7 +80,7 @@ export async function resolveBindingIpsForSync(
   index: BindingIpIndex,
   db?: Db,
 ): Promise<string[]> {
-  const directIps = binding.target_ips.filter(isIpLiteral);
+  const directIps = (binding.target_ips ?? []).filter(isIpLiteral);
   if (directIps.length > 0) {
     return [...directIps];
   }
@@ -124,7 +125,7 @@ export async function buildServiceSyncBindingsAsync(
   const serviceIps = repos.listServiceIps(db, serviceId);
   const allBindings = repos.listAllBindings(db);
   const index = buildBindingIndex(allBindings);
-  const bindings = repos.listBindingsByService(db, serviceId);
+  const bindings = allBindings.filter((row) => row.service_id === serviceId);
 
   const items: CfdmBindingSyncItem[] = [];
   for (const binding of bindings) {

apps/api/test/services-create-list.test.ts

@@ -165,4 +165,94 @@ describe("create service then list groups", () => {
 
     await app.close();
   });
+
+  it("PATCH /services/:id/ips/toggle keeps IP in pool and removes it from A-binding", async () => {
+    const app = await buildApp({
+      config: { ...loadConfig(), staticDir: null },
+      memory: true,
+    });
+    const headers = await authHeaders(app);
+    const cf = mockCf();
+
+    repos.createDomain(app.db, null, "example.com", "zone-1");
+    const group = repos.createServiceGroup(
+      app.db,
+      "VPN",
+      "vpn",
+      null,
+      "vpn.example.com",
+    );
+
+    const createRes = await app.inject({
+      method: "POST",
+      url: "/api/v1/services",
+      headers,
+      payload: {
+        name: "Panel",
+        slug: "panel-ip-toggle",
+        service_group_id: group.id,
+      },
+    });
+    expect(createRes.statusCode).toBe(200);
+    const created = createRes.json() as { id: number };
+
+    await updateConfig(app.db, cf, created.id, {
+      ips: ["1.2.3.4", "5.6.7.8"],
+      service_group_id: group.id,
+      domains: [
+        {
+          fqdn: "panel.example.com",
+          target_ips: ["1.2.3.4", "5.6.7.8"],
+          target_ip_weights: { "1.2.3.4": 1, "5.6.7.8": 1 },
+          target_ip_priorities: { "1.2.3.4": 1, "5.6.7.8": 1 },
+          lb_mode: "round_robin",
+          health_check_enabled: false,
+          health_check_type: "tcp",
+          health_check_port: 443,
+          health_check_path: null,
+          health_check_expected_status: null,
+          health_check_interval_sec: 30,
+          health_check_timeout_ms: 3000,
+          health_check_verify_tls: false,
+        },
+      ],
+    });
+
+    // HTTP toggle uses request.server.cf; disable DNS push so the test
+    // does not call the real Cloudflare client.
+    repos.setServiceEnabled(app.db, created.id, false);
+
+    const offRes = await app.inject({
+      method: "PATCH",
+      url: `/api/v1/services/${created.id}/ips/toggle`,
+      headers,
+      payload: { ip: "1.2.3.4", enabled: false },
+    });
+    expect(offRes.statusCode, JSON.stringify(offRes.json())).toBe(200);
+    const offView = offRes.json() as {
+      ips: string[];
+      ip_enabled: Record<string, boolean>;
+    };
+    expect(offView.ips).toEqual(expect.arrayContaining(["1.2.3.4", "5.6.7.8"]));
+    expect(offView.ip_enabled["1.2.3.4"]).toBe(false);
+    expect(offView.ip_enabled["5.6.7.8"]).toBe(true);
+
+    const binding = repos.listBindingsByService(app.db, created.id)[0]!;
+    expect(repos.listBindingIps(app.db, binding.id)).toEqual(["5.6.7.8"]);
+
+    const onRes = await app.inject({
+      method: "PATCH",
+      url: `/api/v1/services/${created.id}/ips/toggle`,
+      headers,
+      payload: { ip: "1.2.3.4", enabled: true },
+    });
+    expect(onRes.statusCode).toBe(200);
+    const onView = onRes.json() as { ip_enabled: Record<string, boolean> };
+    expect(onView.ip_enabled["1.2.3.4"]).toBe(true);
+    expect(repos.listBindingIps(app.db, binding.id)).toEqual(
+      expect.arrayContaining(["1.2.3.4", "5.6.7.8"]),
+    );
+
+    await app.close();
+  });
 });

apps/api/test/settings-health.test.ts

@@ -0,0 +1,136 @@
+import { describe, expect, it } from "vitest";
+import { buildApp } from "../src/app.js";
+import { loadConfig } from "../src/config.js";
+
+async function authHeaders(app: Awaited<ReturnType<typeof buildApp>>) {
+  const res = await app.inject({
+    method: "POST",
+    url: "/api/v1/auth/login",
+    payload: { username: "admin", password: "admin" },
+  });
+  expect(res.statusCode).toBe(200);
+  const { token } = res.json() as { token: string };
+  return { authorization: `Bearer ${token}` };
+}
+
+describe("settings health engine", () => {
+  it("GET /api/v1/settings returns env fallbacks for health fields", async () => {
+    const app = await buildApp({
+      config: {
+        ...loadConfig(),
+        staticDir: null,
+        healthCheckCron: "*/30 * * * * *",
+        healthDegradedFailures: 3,
+        healthDownFailures: 4,
+        healthLatencyWarnMs: 1500,
+        healthSuccessRecoveries: 5,
+      },
+      memory: true,
+    });
+    const headers = await authHeaders(app);
+    const res = await app.inject({
+      method: "GET",
+      url: "/api/v1/settings",
+      headers,
+    });
+    expect(res.statusCode).toBe(200);
+    const body = res.json() as {
+      healthCheckCron: string;
+      healthDegradedFailures: number;
+      healthDownFailures: number;
+      healthLatencyWarnMs: number;
+      healthSuccessRecoveries: number;
+    };
+    expect(body.healthCheckCron).toBe("*/30 * * * * *");
+    expect(body.healthDegradedFailures).toBe(3);
+    expect(body.healthDownFailures).toBe(4);
+    expect(body.healthLatencyWarnMs).toBe(1500);
+    expect(body.healthSuccessRecoveries).toBe(5);
+    await app.close();
+  });
+
+  it("PATCH persists health engine settings", async () => {
+    const app = await buildApp({
+      config: { ...loadConfig(), staticDir: null },
+      memory: true,
+    });
+    const headers = await authHeaders(app);
+    const res = await app.inject({
+      method: "PATCH",
+      url: "/api/v1/settings",
+      headers,
+      payload: {
+        healthCheckCron: "0 */5 * * * *",
+        healthDegradedFailures: 2,
+        healthDownFailures: 4,
+        healthLatencyWarnMs: 800,
+        healthSuccessRecoveries: 3,
+      },
+    });
+    expect(res.statusCode).toBe(200);
+    const body = res.json() as {
+      healthCheckCron: string;
+      healthDegradedFailures: number;
+      healthDownFailures: number;
+      healthLatencyWarnMs: number;
+      healthSuccessRecoveries: number;
+    };
+    expect(body.healthCheckCron).toBe("0 */5 * * * *");
+    expect(body.healthDegradedFailures).toBe(2);
+    expect(body.healthDownFailures).toBe(4);
+    expect(body.healthLatencyWarnMs).toBe(800);
+    expect(body.healthSuccessRecoveries).toBe(3);
+
+    const again = await app.inject({
+      method: "GET",
+      url: "/api/v1/settings",
+      headers,
+    });
+    expect(again.json()).toMatchObject({
+      healthCheckCron: "0 */5 * * * *",
+      healthDegradedFailures: 2,
+      healthDownFailures: 4,
+      healthLatencyWarnMs: 800,
+      healthSuccessRecoveries: 3,
+    });
+    await app.close();
+  });
+
+  it("PATCH rejects invalid cron", async () => {
+    const app = await buildApp({
+      config: { ...loadConfig(), staticDir: null },
+      memory: true,
+    });
+    const headers = await authHeaders(app);
+    const res = await app.inject({
+      method: "PATCH",
+      url: "/api/v1/settings",
+      headers,
+      payload: { healthCheckCron: "not-a-cron" },
+    });
+    expect(res.statusCode).toBe(400);
+    expect(res.json()).toMatchObject({
+      error: { code: "VALIDATION_ERROR" },
+    });
+    await app.close();
+  });
+
+  it("PATCH rejects down < degraded", async () => {
+    const app = await buildApp({
+      config: { ...loadConfig(), staticDir: null },
+      memory: true,
+    });
+    const headers = await authHeaders(app);
+    const res = await app.inject({
+      method: "PATCH",
+      url: "/api/v1/settings",
+      headers,
+      payload: {
+        healthDegradedFailures: 5,
+        healthDownFailures: 2,
+      },
+    });
+    expect(res.statusCode).toBe(400);
+    await app.close();
+  });
+});

apps/api/test/vps-tracker-sync.test.ts

@@ -134,6 +134,19 @@ describe("resolveBindingIpsForSync", () => {
     expect(ips).toEqual(["203.0.113.10"]);
   });
 
+  it("treats missing target_ips as empty instead of throwing", async () => {
+    const cname = binding({
+      id: 2,
+      hostname: "imsk",
+      zone_name: "rkns.top",
+      cname_target: "ihome.rkns.top",
+    });
+    delete (cname as { target_ips?: string[] }).target_ips;
+    const index = { byFqdn: new Map([["imsk.rkns.top", cname]]) };
+    const ips = await resolveBindingIpsForSync(cname, ["198.51.100.9"], index);
+    expect(ips).toEqual(["198.51.100.9"]);
+  });
+
   it("prefers service IPs over empty CNAME resolution chain", async () => {
     const cname = binding({
       id: 2,