refactor(core): Move queueModeId as hostId to InstanceSettings (#11262)

packages/core/src/InstanceSettings.ts

@@ -1,9 +1,12 @@
 import { createHash, randomBytes } from 'crypto';
 import { existsSync, mkdirSync, readFileSync, writeFileSync } from 'fs';
-import { ApplicationError, jsonParse } from 'n8n-workflow';
+import { ApplicationError, jsonParse, ALPHABET } from 'n8n-workflow';
+import { customAlphabet } from 'nanoid';
 import path from 'path';
 import { Service } from 'typedi';
 
+const nanoid = customAlphabet(ALPHABET, 16);
+
 interface ReadOnlySettings {
 	encryptionKey: string;
 }
@@ -40,6 +43,12 @@ export class InstanceSettings {
 
 	private settings = this.loadOrCreate();
 
+	/**
+	 * Fixed ID of this n8n instance, for telemetry.
+	 * Derived from encryption key. Do not confuse with `hostId`.
+	 *
+	 * @example '258fce876abf5ea60eb86a2e777e5e190ff8f3e36b5b37aafec6636c31d4d1f9'
+	 */
 	readonly instanceId = this.generateInstanceId();
 
 	readonly instanceType: InstanceType;
@@ -49,6 +58,8 @@ export class InstanceSettings {
 		this.instanceType = ['webhook', 'worker'].includes(command)
 			? (command as InstanceType)
 			: 'main';
+
+		this.hostId = `${this.instanceType}-${nanoid()}`;
 	}
 
 	/**
@@ -61,6 +72,16 @@ export class InstanceSettings {
 	 */
 	instanceRole: InstanceRole = 'unset';
 
+	/**
+	 * Transient ID of this n8n instance, for scaling mode.
+	 * Reset on restart. Do not confuse with `instanceId`.
+	 *
+	 * @example 'main-bnxa1riryKUNHtln'
+	 * @example 'worker-nDJR0FnSd2Vf6DB5'
+	 * @example 'webhook-jxQ7AO8IzxEtfW1F'
+	 */
+	readonly hostId: string;
+
 	get isLeader() {
 		return this.instanceRole === 'leader';
 	}