[RHIDP-13414] Update lightspeed core host (#3059)

* use constant variable for lightspeed host across all instances

Signed-off-by: Jordan Dubrick <jdubrick@redhat.com>

* use 127.0.0.1 instead of 0.0.0.0 for LCORE instance

Signed-off-by: Jordan Dubrick <jdubrick@redhat.com>

* changeset

Signed-off-by: Jordan Dubrick <jdubrick@redhat.com>

---------

Signed-off-by: Jordan Dubrick <jdubrick@redhat.com>

Author: Jdubrick

workspaces/lightspeed/.changeset/chilly-cars-carry.md

@@ -0,0 +1,5 @@
+---
+'@red-hat-developer-hub/backstage-plugin-lightspeed-backend': patch
+---
+
+update default LCORE host from 0.0.0.0 to 127.0.0.1

workspaces/lightspeed/plugins/lightspeed-backend/README.md

@@ -125,7 +125,7 @@ lightspeed:
 
 **Core Settings**:
 
-- **`lightspeed.servicePort`** _(optional)_: Port where Lightspeed Core service is running (default: `8080`). The backend connects to Lightspeed Core at `http://0.0.0.0:{servicePort}` to proxy vector store operations.
+- **`lightspeed.servicePort`** _(optional)_: Port where Lightspeed Core service is running (default: `8080`). The backend connects to Lightspeed Core at `http://{DEFAULT_LIGHTSPEED_SERVICE_HOST}:{servicePort}` to proxy vector store operations. The host is defined by the `DEFAULT_LIGHTSPEED_SERVICE_HOST` constant in the source.
 
 **Notebooks Settings**:
 

workspaces/lightspeed/plugins/lightspeed-backend/__fixtures__/lcsHandlers.ts

@@ -16,7 +16,12 @@
 
 import { http, HttpResponse, type HttpHandler } from 'msw';
 
-export const LOCAL_LCS_ADDR = 'http://0.0.0.0:8080';
+import {
+  DEFAULT_LIGHTSPEED_SERVICE_HOST,
+  DEFAULT_LIGHTSPEED_SERVICE_PORT,
+} from '../src/service/constant';
+
+export const LOCAL_LCS_ADDR = `http://${DEFAULT_LIGHTSPEED_SERVICE_HOST}:${DEFAULT_LIGHTSPEED_SERVICE_PORT}`;
 
 function loadTestFixture(filePathFromFixturesDir: string) {
   return require(`${__dirname}/${filePathFromFixturesDir}`);

workspaces/lightspeed/plugins/lightspeed-backend/__fixtures__/lightspeedCoreHandlers.ts

@@ -16,9 +16,11 @@
 
 import { http, HttpResponse, type HttpHandler } from 'msw';
 
+import { DEFAULT_LIGHTSPEED_SERVICE_HOST } from '../src/service/constant';
+
 // Use port 7007 for tests (matches notebooksRouter.test.ts config)
 const TEST_LIGHTSPEED_SERVICE_PORT = 7007;
-export const LIGHTSPEED_CORE_ADDR = `http://0.0.0.0:${TEST_LIGHTSPEED_SERVICE_PORT}`;
+export const LIGHTSPEED_CORE_ADDR = `http://${DEFAULT_LIGHTSPEED_SERVICE_HOST}:${TEST_LIGHTSPEED_SERVICE_PORT}`;
 
 // Mock session data
 export const mockSession1 = {

workspaces/lightspeed/plugins/lightspeed-backend/config.d.ts

@@ -56,7 +56,7 @@ export interface Config {
       /**
        * Enable/disable AI Notebooks feature
        * When enabled, exposes AI Notebooks REST API endpoints for document-based conversations with RAG.
-       * Requires Lightspeed service to be running (default: http://0.0.0.0:8080).
+       * Requires Lightspeed service to be running (host and port default to 127.0.0.1 and 8080).
        * @default false
        * @visibility frontend
        */

workspaces/lightspeed/plugins/lightspeed-backend/src/service/constant.ts

@@ -22,7 +22,7 @@ export const DEFAULT_CHUNKING_STRATEGY_TYPE = 'auto'; // auto chunking
 export const DEFAULT_MAX_CHUNK_SIZE_TOKENS = 512; // 512 tokens
 export const DEFAULT_CHUNK_OVERLAP_TOKENS = 50; // 50 tokens
 export const DEFAULT_LLAMA_STACK_PORT = 8321; // Llama Stack port
-export const DEFAULT_LIGHTSPEED_SERVICE_HOST = '0.0.0.0'; // Lightspeed core service host
+export const DEFAULT_LIGHTSPEED_SERVICE_HOST = '127.0.0.1'; // Lightspeed core service host
 export const DEFAULT_LIGHTSPEED_SERVICE_PORT = 8080; // Lightspeed service port
 export const DEFAULT_MAX_FILE_SIZE_MB = 20 * 1024 * 1024; // 20MB
 export const NOTEBOOKS_SYSTEM_PROMPT = `

workspaces/lightspeed/plugins/lightspeed-backend/src/service/router.ts

@@ -33,6 +33,7 @@ import {
 import { Readable } from 'node:stream';
 
 import {
+  DEFAULT_LIGHTSPEED_SERVICE_HOST,
   DEFAULT_LIGHTSPEED_SERVICE_PORT,
   PROXY_PASSTHROUGH_PATHS,
 } from './constant';
@@ -110,9 +111,10 @@ export async function createRouter(
     config.getOptionalNumber('lightspeed.servicePort') ??
     DEFAULT_LIGHTSPEED_SERVICE_PORT;
   const system_prompt = config.getOptionalString('lightspeed.systemPrompt');
+  const lightspeedCoreBaseUrl = `http://${DEFAULT_LIGHTSPEED_SERVICE_HOST}:${port}`;
 
   const vectorStoresOperator = VectorStoresOperator.getInstance(
-    `http://0.0.0.0:${port}`,
+    lightspeedCoreBaseUrl,
     logger,
   );
   let lightspeed_vector_store_id: string = '';
@@ -145,7 +147,7 @@ export async function createRouter(
 
   async function refreshLcsUrlCache(): Promise<void> {
     try {
-      const response = await fetch(`http://0.0.0.0:${port}/v1/mcp-servers`, {
+      const response = await fetch(`${lightspeedCoreBaseUrl}/v1/mcp-servers`, {
         signal: AbortSignal.timeout(5000),
       });
       if (!response.ok) {
@@ -455,7 +457,7 @@ export async function createRouter(
     }
     // Proxy middleware configuration
     const apiProxy = createProxyMiddleware({
-      target: `http://0.0.0.0:${port}`,
+      target: lightspeedCoreBaseUrl,
       changeOrigin: true,
       pathRewrite: (path, _) => {
         const isSkippable = Array.from(SKIP_USER_ID_ENDPOINTS).some(endpoint =>
@@ -507,7 +509,7 @@ export async function createRouter(
       const userQueryParam = `user_id=${encodeURIComponent(user_id)}`;
       const requestBody = JSON.stringify(request.body);
       const fetchResponse = await fetch(
-        `http://0.0.0.0:${port}/v1/feedback?${userQueryParam}`,
+        `${lightspeedCoreBaseUrl}/v1/feedback?${userQueryParam}`,
         {
           method: 'POST',
           headers: {
@@ -555,7 +557,7 @@ export async function createRouter(
       const userQueryParam = `user_id=${encodeURIComponent(user_id)}`;
       const requestBody = JSON.stringify(request.body);
       const fetchResponse = await fetch(
-        `http://0.0.0.0:${port}/v1/streaming_query/interrupt?${userQueryParam}`,
+        `${lightspeedCoreBaseUrl}/v1/streaming_query/interrupt?${userQueryParam}`,
         {
           method: 'POST',
           headers: {
@@ -631,7 +633,7 @@ export async function createRouter(
         );
 
         const fetchResponse = await fetch(
-          `http://0.0.0.0:${port}/v1/streaming_query?${userQueryParam}`,
+          `${lightspeedCoreBaseUrl}/v1/streaming_query?${userQueryParam}`,
           {
             method: 'POST',
             headers: {
@@ -690,7 +692,7 @@ export async function createRouter(
         );
         const userQueryParam = `user_id=${encodeURIComponent(user_id)}`;
         const fetchResponse = await fetch(
-          `http://0.0.0.0:${port}/v2/conversations/${conversation_id}?${userQueryParam}`,
+          `${lightspeedCoreBaseUrl}/v2/conversations/${conversation_id}?${userQueryParam}`,
           {
             method: 'PUT',
             headers: {