Forward kernel telemetry options

lib/DBSQLClient.ts

@@ -729,7 +729,8 @@ export default class DBSQLClient extends EventEmitter implements IDBSQLClient, I
     // doesn't ship in the public `.d.ts`. Mirrors Python's `kwargs.get("use_kernel")`
     // pattern (see databricks-sql-python/src/databricks/sql/session.py).
     const internalOptions = options as ConnectionOptions & InternalConnectionOptions;
-    const backend = internalOptions.useKernel
+    const useKernel = internalOptions.useKernel === true;
+    const backend = useKernel
       ? new KernelBackend({ context: this })
       : new ThriftBackend({
           context: this,
@@ -777,7 +778,7 @@ export default class DBSQLClient extends EventEmitter implements IDBSQLClient, I
           `Telemetry remains controlled by the runtime config and feature flag.`,
       );
     }
-    if (this.config.telemetryEnabled && !envDisabled) {
+    if (!useKernel && this.config.telemetryEnabled && !envDisabled) {
       await this.initializeTelemetry();
     }
 

lib/kernel/KernelAuth.ts

@@ -12,11 +12,16 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import os from 'os';
 import { ConnectionOptions } from '../contracts/IDBSQLClient';
+import { ClientConfig } from '../contracts/IClientContext';
 import { InternalConnectionOptions } from '../contracts/InternalConnectionOptions';
 import AuthenticationError from '../errors/AuthenticationError';
 import HiveDriverError from '../errors/HiveDriverError';
 import { buildUserAgentString, normalizePemBytes } from '../utils';
+import driverVersion from '../version';
+import { DRIVER_NAME } from '../telemetry/types';
+import { sanitizeProcessName } from '../telemetry/telemetryUtils';
 
 /**
  * Default local listener port for the U2M authorization-code callback.
@@ -131,6 +136,32 @@ export interface KernelSessionDefaults {
   retryOverallTimeoutSecs?: number;
 }
 
+export interface KernelTelemetryOptions {
+  /** Driver/runtime identity forwarded to kernel-owned telemetry. */
+  driverName?: string;
+  driverVersion?: string;
+  runtimeName?: string;
+  runtimeVersion?: string;
+  runtimeVendor?: string;
+  osName?: string;
+  osVersion?: string;
+  osArch?: string;
+  clientAppName?: string;
+  localeName?: string;
+  charSetEncoding?: string;
+  processName?: string;
+  /** Kernel-owned telemetry switch and batching. */
+  telemetryEnabled?: boolean;
+  telemetryBatchSize?: number;
+  telemetryFlushIntervalMs?: number;
+  telemetryMaxRetries?: number;
+  telemetryRetryDelayMs?: number;
+  telemetryCloseFlushTimeoutMs?: number;
+  telemetryCircuitBreakerEnabled?: boolean;
+  telemetryCircuitBreakerThreshold?: number;
+  telemetryCircuitBreakerTimeoutMs?: number;
+}
+
 /**
  * TLS options shared across all auth-mode variants. Mirror the napi
  * binding's `ConnectionOptions.checkServerCertificate` / `.customCaCert`
@@ -227,6 +258,7 @@ export interface KernelFederationOptions {
 export type KernelNativeConnectionOptions = KernelSessionDefaults &
   KernelTlsOptions &
   KernelHttpOptions &
+  KernelTelemetryOptions &
   KernelProxyOptions &
   KernelFederationOptions &
   (
@@ -588,6 +620,91 @@ export function buildKernelRetryOptions(config: {
   return out;
 }
 
+function getLocaleName(env: NodeJS.ProcessEnv = process.env): string {
+  try {
+    const lang = env.LANG || env.LC_ALL || env.LC_MESSAGES || '';
+    const match = lang.match(/^([a-z]{2}_[A-Z]{2})/);
+    return match?.[1] ?? 'en_US';
+  } catch {
+    return 'en_US';
+  }
+}
+
+function getProcessName(): string {
+  try {
+    if (process.title && process.title !== 'node') {
+      return sanitizeProcessName(process.title) || 'node';
+    }
+    const scriptPath = process.argv?.[1];
+    if (scriptPath) {
+      return sanitizeProcessName(scriptPath).replace(/\.[^.]*$/, '') || 'node';
+    }
+    return 'node';
+  } catch {
+    return 'node';
+  }
+}
+
+export function isTelemetryDisabledByEnv(env: NodeJS.ProcessEnv = process.env): boolean {
+  const raw = env.DATABRICKS_TELEMETRY_DISABLED;
+  const trimmed = typeof raw === 'string' ? raw.trim() : '';
+  return trimmed.length > 0 && /^(1|true|yes|on)$/i.test(trimmed);
+}
+
+export function buildKernelTelemetryOptions(
+  config: Pick<
+    ClientConfig,
+    | 'telemetryEnabled'
+    | 'telemetryBatchSize'
+    | 'telemetryFlushIntervalMs'
+    | 'telemetryMaxRetries'
+    | 'telemetryBackoffBaseMs'
+    | 'telemetryCloseTimeoutMs'
+    | 'telemetryCircuitBreakerThreshold'
+    | 'telemetryCircuitBreakerTimeout'
+  >,
+) {
+  const telemetry: KernelTelemetryOptions = {
+    driverName: DRIVER_NAME,
+    driverVersion,
+    runtimeName: 'Node.js',
+    runtimeVersion: process.version,
+    runtimeVendor: 'Node.js Foundation',
+    osName: process.platform,
+    osVersion: os.release(),
+    osArch: os.arch(),
+    clientAppName: undefined,
+    localeName: getLocaleName(),
+    charSetEncoding: 'UTF-8',
+    processName: getProcessName(),
+    telemetryEnabled: (config.telemetryEnabled ?? true) && !isTelemetryDisabledByEnv(),
+  };
+
+  if (Number.isFinite(config.telemetryBatchSize)) {
+    telemetry.telemetryBatchSize = config.telemetryBatchSize;
+  }
+  if (Number.isFinite(config.telemetryFlushIntervalMs)) {
+    telemetry.telemetryFlushIntervalMs = config.telemetryFlushIntervalMs;
+  }
+  if (Number.isFinite(config.telemetryMaxRetries)) {
+    telemetry.telemetryMaxRetries = config.telemetryMaxRetries;
+  }
+  if (Number.isFinite(config.telemetryBackoffBaseMs)) {
+    telemetry.telemetryRetryDelayMs = config.telemetryBackoffBaseMs;
+  }
+  if (Number.isFinite(config.telemetryCloseTimeoutMs)) {
+    telemetry.telemetryCloseFlushTimeoutMs = config.telemetryCloseTimeoutMs;
+  }
+  if (Number.isFinite(config.telemetryCircuitBreakerThreshold)) {
+    telemetry.telemetryCircuitBreakerThreshold = config.telemetryCircuitBreakerThreshold;
+  }
+  if (Number.isFinite(config.telemetryCircuitBreakerTimeout)) {
+    telemetry.telemetryCircuitBreakerTimeoutMs = config.telemetryCircuitBreakerTimeout;
+  }
+
+  return telemetry;
+}
+
 /**
  * Map the public `ConnectionOptions.proxy` (`{protocol, host, port, auth}` —
  * the same shape the Thrift backend accepts) onto the kernel's structured napi

lib/kernel/KernelBackend.ts

@@ -22,7 +22,12 @@ import HiveDriverError from '../errors/HiveDriverError';
 import { serializeQueryTags } from '../utils';
 import { getKernelNative, KernelNativeBinding, KernelConnection } from './KernelNativeLoader';
 import { decodeNapiKernelError } from './KernelErrorMapping';
-import { buildKernelConnectionOptions, buildKernelRetryOptions, KernelNativeConnectionOptions } from './KernelAuth';
+import {
+  buildKernelConnectionOptions,
+  buildKernelRetryOptions,
+  buildKernelTelemetryOptions,
+  KernelNativeConnectionOptions,
+} from './KernelAuth';
 import { installKernelLogBridge } from './KernelLogging';
 import KernelSessionBackend from './KernelSessionBackend';
 
@@ -93,6 +98,7 @@ export default class KernelBackend implements IBackend {
     this.nativeOptions = {
       ...buildKernelConnectionOptions(options),
       ...buildKernelRetryOptions(this.context.getConfig()),
+      ...buildKernelTelemetryOptions(this.context.getConfig()),
     };
 
     // Bridge the Rust kernel's `tracing` logs into the SAME `DBSQLLogger` the

tests/unit/DBSQLClient.test.ts

@@ -4,6 +4,7 @@ import fs from 'fs';
 import DBSQLClient, { ThriftLibrary } from '../../lib/DBSQLClient';
 import DBSQLSession from '../../lib/DBSQLSession';
 import ThriftBackend from '../../lib/thrift-backend/ThriftBackend';
+import KernelBackend from '../../lib/kernel/KernelBackend';
 
 import PlainHttpAuthentication from '../../lib/connection/auth/PlainHttpAuthentication';
 import DatabricksOAuth from '../../lib/connection/auth/DatabricksOAuth';
@@ -957,6 +958,22 @@ describe('DBSQLClient telemetry paths', () => {
         .filter((c) => c.args[0] === LogLevel.warn && /DATABRICKS_TELEMETRY_DISABLED/.test(c.args[1] as string));
       expect(warnCalls.length).to.equal(0);
     });
+
+    it('does not initialize Node telemetry on the kernel path', async () => {
+      delete process.env.DATABRICKS_TELEMETRY_DISABLED;
+      const client = new DBSQLClient();
+      const initStub = sinon.stub(client as any, 'initializeTelemetry').resolves();
+      sinon.stub(KernelBackend.prototype, 'connect').resolves();
+      sinon.stub(KernelBackend.prototype, 'close').resolves();
+
+      try {
+        await client.connect({ ...connectOptions, telemetryEnabled: true, useKernel: true } as any);
+
+        expect(initStub.callCount).to.equal(0);
+      } finally {
+        await client.close();
+      }
+    });
   });
 
   describe('extractWorkspaceId', () => {

tests/unit/kernel/_helpers/nativeOptions.ts

@@ -33,6 +33,31 @@ export default function expectNativeConnectionOptions(actual: unknown, expectedR
   const { customHeaders, ...rest } = actual as Record<string, unknown> & {
     customHeaders?: Array<{ name: string; value: string }>;
   };
+  for (const key of [
+    'driverName',
+    'driverVersion',
+    'runtimeName',
+    'runtimeVersion',
+    'runtimeVendor',
+    'osName',
+    'osVersion',
+    'osArch',
+    'clientAppName',
+    'localeName',
+    'charSetEncoding',
+    'processName',
+    'telemetryEnabled',
+    'telemetryBatchSize',
+    'telemetryFlushIntervalMs',
+    'telemetryMaxRetries',
+    'telemetryRetryDelayMs',
+    'telemetryCloseFlushTimeoutMs',
+    'telemetryCircuitBreakerEnabled',
+    'telemetryCircuitBreakerThreshold',
+    'telemetryCircuitBreakerTimeoutMs',
+  ]) {
+    delete rest[key];
+  }
   expect(rest).to.deep.equal(expectedRest);
   expect(customHeaders, 'customHeaders').to.be.an('array').with.lengthOf(1);
   expect(customHeaders?.[0].name).to.equal('User-Agent');

tests/unit/kernel/execution.test.ts

@@ -418,13 +418,13 @@ function makeBinding(connection: KernelConnection): KernelNativeBinding & {
   return Object.assign(binding, { openSessionStub });
 }
 
-function makeContext(logger?: IDBSQLLogger): IClientContext {
+function makeContext(logger?: IDBSQLLogger, configOverrides: Partial<ClientConfig> = {}): IClientContext {
   const log: IDBSQLLogger = logger ?? {
     log(_level: LogLevel, _message: string): void {
       // no-op
     },
   };
-  const config = {} as ClientConfig;
+  const config = configOverrides as ClientConfig;
   return {
     getConfig: () => config,
     getLogger: () => log,
@@ -551,6 +551,95 @@ describe('KernelBackend', () => {
     });
   });
 
+  it('openSession() forwards kernel-owned telemetry config and runtime identity to napi binding', async () => {
+    const savedEnv = process.env.DATABRICKS_TELEMETRY_DISABLED;
+    delete process.env.DATABRICKS_TELEMETRY_DISABLED;
+
+    const connection = new FakeNativeConnection();
+    const binding = makeBinding(connection);
+    const backend = new KernelBackend({
+      context: makeContext(undefined, {
+        telemetryEnabled: false,
+        telemetryBatchSize: 17,
+        telemetryFlushIntervalMs: 1_000,
+        telemetryMaxRetries: 2,
+        telemetryBackoffBaseMs: 50,
+        telemetryCloseTimeoutMs: 2_500,
+        telemetryCircuitBreakerThreshold: 3,
+        telemetryCircuitBreakerTimeout: 60_000,
+      }),
+      nativeBinding: binding,
+    });
+
+    try {
+      await backend.connect({
+        host: 'workspace.example',
+        path: '/sql/1.0/warehouses/xyz',
+        token: 'dapi-token',
+      } as ConnectionOptions);
+
+      await backend.openSession({});
+
+      const args = binding.openSessionStub.firstCall.args[0] as Record<string, unknown>;
+      expect(args.driverName).to.equal('nodejs-sql-driver');
+      expect(args.driverVersion).to.be.a('string').and.not.equal('');
+      expect(args.runtimeName).to.equal('Node.js');
+      expect(args.runtimeVersion).to.equal(process.version);
+      expect(args.runtimeVendor).to.equal('Node.js Foundation');
+      expect(args.osName).to.equal(process.platform);
+      expect(args.osVersion).to.be.a('string').and.not.equal('');
+      expect(args.osArch).to.be.a('string').and.not.equal('');
+      expect(args.localeName).to.be.a('string').and.not.equal('');
+      expect(args.charSetEncoding).to.equal('UTF-8');
+      expect(args.processName).to.be.a('string').and.not.equal('');
+      expect(args.telemetryEnabled).to.equal(false);
+      expect(args.telemetryBatchSize).to.equal(17);
+      expect(args.telemetryFlushIntervalMs).to.equal(1_000);
+      expect(args.telemetryMaxRetries).to.equal(2);
+      expect(args.telemetryRetryDelayMs).to.equal(50);
+      expect(args.telemetryCloseFlushTimeoutMs).to.equal(2_500);
+      expect(args.telemetryCircuitBreakerEnabled).to.equal(undefined);
+      expect(args.telemetryCircuitBreakerThreshold).to.equal(3);
+      expect(args.telemetryCircuitBreakerTimeoutMs).to.equal(60_000);
+    } finally {
+      if (savedEnv === undefined) {
+        delete process.env.DATABRICKS_TELEMETRY_DISABLED;
+      } else {
+        process.env.DATABRICKS_TELEMETRY_DISABLED = savedEnv;
+      }
+    }
+  });
+
+  it('openSession() forwards env-disabled kernel telemetry even when config enables telemetry', async () => {
+    const savedEnv = process.env.DATABRICKS_TELEMETRY_DISABLED;
+    process.env.DATABRICKS_TELEMETRY_DISABLED = 'true';
+
+    const connection = new FakeNativeConnection();
+    const binding = makeBinding(connection);
+    const backend = new KernelBackend({
+      context: makeContext(undefined, { telemetryEnabled: true }),
+      nativeBinding: binding,
+    });
+
+    try {
+      await backend.connect({
+        host: 'workspace.example',
+        path: '/sql/1.0/warehouses/xyz',
+        token: 'dapi-token',
+      } as ConnectionOptions);
+      await backend.openSession({});
+
+      const args = binding.openSessionStub.firstCall.args[0] as { telemetryEnabled?: boolean };
+      expect(args.telemetryEnabled).to.equal(false);
+    } finally {
+      if (savedEnv === undefined) {
+        delete process.env.DATABRICKS_TELEMETRY_DISABLED;
+      } else {
+        process.env.DATABRICKS_TELEMETRY_DISABLED = savedEnv;
+      }
+    }
+  });
+
   it('openSession() serializes session-level queryTags into sessionConf.QUERY_TAGS', async () => {
     const connection = new FakeNativeConnection();
     const binding = makeBinding(connection);