cleanup local vs compose testing

.env.compose

@@ -0,0 +1,4 @@
+REACT_APP_NODE_ENV=development
+REACT_APP_LOCAL=localhost
+REACT_APP_MODEL_SERVICE=model
+REACT_APP_SERVER_PORT=5002

.env.dev

@@ -0,0 +1,4 @@
+REACT_APP_NODE_ENV=development
+REACT_APP_LOCAL=localhost
+REACT_APP_MODEL_SERVICE=localhost
+REACT_APP_SERVER_PORT=5002

Dockerfile

@@ -10,10 +10,6 @@ ARG NODE_VERSION=23.10.0
 
 FROM node:${NODE_VERSION}-alpine
 
-# Use production node environment by default.
-ENV NODE_ENV production
-
-
 WORKDIR /usr/src/app
 
 # Download dependencies as a separate step to take advantage of Docker's caching.
@@ -37,5 +33,8 @@ EXPOSE 3000
 # To access server.js
 EXPOSE 5001
 
+# Expose dev port
+EXPOSE 5002
+
 # Run the application.
-CMD npm start
+CMD npm run start:prod

README.md

@@ -12,15 +12,13 @@ It is a NodeJS app that uses the llama3.2 model to service prompt requests. It u
 ## How to Run
 
 ### Locally
-- Update the `App.js` and `server.js` to use 0.0.0.0 as hosts for API requests instead of K8s service names.
-- `docker run -p 11434:11434 ollama/ollama:0.6.2`
+- Run an LLM container `docker run -p 11434:11434 --name model ollama/ollama:0.6.2`
 - Exec into the container and run `ollama pull llama3.2`
-- `npm start`
+- `dotenv -e .env.dev -- npm run start:dev`
 
 ### Locally with Docker Compose
 I used compose to develop this locally. 
 
-- Update the `App.js` and `server.js` to use 0.0.0.0 as hosts for API requests instead of K8s service names.
 - `docker compose up --build`
 - When done, `docker compose down`
 

compose.yaml

@@ -9,53 +9,24 @@
 # https://github.com/docker/awesome-compose
 services:
   server:
+    container_name: server
+    command: npm run start:dev
     depends_on:
       - model
     build:
       context: .
-    environment:
-      NODE_ENV: production
+    volumes:
+      - ./:/usr/src/app
+      - /usr/src/app/node_modules
+    env_file:
+      - .env.compose
     ports:
       - 3000:3000
+      - 5002:5002
   model:
+    container_name: model
     image: ollama/ollama:0.6.2
     ports:
       - 11434:11434
-    container_name: ollama
     post_start:
       - command: ollama pull llama3.2
-
-
-# The commented out section below is an example of how to define a PostgreSQL
-# database that your application can use. `depends_on` tells Docker Compose to
-# start the database before your application. The `db-data` volume persists the
-# database data between container restarts. The `db-password` secret is used
-# to set the database password. You must create `db/password.txt` and add
-# a password of your choosing to it before running `docker-compose up`.
-#     depends_on:
-#       db:
-#         condition: service_healthy
-#   db:
-#     image: postgres
-#     restart: always
-#     user: postgres
-#     secrets:
-#       - db-password
-#     volumes:
-#       - db-data:/var/lib/postgresql/data
-#     environment:
-#       - POSTGRES_DB=example
-#       - POSTGRES_PASSWORD_FILE=/run/secrets/db-password
-#     expose:
-#       - 5432
-#     healthcheck:
-#       test: [ "CMD", "pg_isready" ]
-#       interval: 10s
-#       timeout: 5s
-#       retries: 5
-# volumes:
-#   db-data:
-# secrets:
-#   db-password:
-#     file: db/password.txt
-

package.json

@@ -13,14 +13,17 @@
     "concurrently": "^9.1.2",
     "cors": "^2.8.5",
     "dockerode": "^4.0.4",
+    "dotenv": "^16.4.7",
     "node-polyfill-webpack-plugin": "^4.1.0",
+    "os": "^0.1.2",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "react-scripts": "5.0.1",
     "web-vitals": "^2.1.4"
   },
   "scripts": {
-    "start": "concurrently \"node server.js\" \"react-scripts start\"",
+    "start:prod": "concurrently \"node server.js\" \"react-scripts start\"",
+    "start:dev": "concurrently \"node server.js\" \"react-scripts start\"",
     "build": "react-scripts build",
     "test": "react-scripts test",
     "eject": "react-scripts eject"

server.js

@@ -3,9 +3,6 @@ const cors = require("cors");        // Import CORS middleware
 const axios = require("axios")
 const app = express(); // Initialize Express
 
-// Use env variable, or fallback to localhost
-// const LLM_API_HOST = process.env.LLM_API_HOST || 'http://0.0.0.0:11434';
-
 app.use(cors());
 app.use(express.json());
 
@@ -26,9 +23,8 @@ app.post("/execute", async (req, res) => {
 });
 
 function getResponse(model, prompt) {
-    //console.log(`${LLM_API_HOST}`)
-    // Use K8s service nae, switch back to 0.0.0.0 for local testing (npm start)
-    return axios.post("http://model-published:11434/api/generate", {
+    var host = ("REACT_APP_MODEL_SERVICE" in process.env) ? process.env.REACT_APP_MODEL_SERVICE : "model-published";
+    return axios.post(`http://${host}:11434/api/generate`, {
         model: model,
         prompt: prompt,
         stream: false
@@ -43,8 +39,8 @@ function getResponse(model, prompt) {
     });
 }
 
-// Start the server and listen on port 5001
-const PORT = 5001;
-app.listen(PORT, () => {
-    console.log(`Server running on port ${PORT}`);
+// Start the server and listen on port specified in command line, ex. PORT=5001 node server.js
+var port = ("REACT_APP_SERVER_PORT" in process.env) ? process.env.REACT_APP_SERVER_PORT : 5001;
+app.listen(port, () => {
+    console.log(`Server running on port ${port}`);
 });

src/App.js

@@ -53,8 +53,9 @@ function App() {
       const prompt = `Context: This is a cat named ${catName}. They have the following traits: ${catTraits}. Generate a response as the cat to the following message: ${newUserInput}`;
 
       // Execute command and wait for the result
-      // Switch K8s service name to 0.0.0.0 for local testing!
-      const result = await fetch("http://a4c423481a99842669d9088bba7450ad-1853516926.us-east-2.elb.amazonaws.com:5001/execute", {
+      var host = ("REACT_APP_LOCAL" in process.env) ? process.env.REACT_APP_LOCAL : "a4c423481a99842669d9088bba7450ad-1853516926.us-east-2.elb.amazonaws.com";
+      var port = ("REACT_APP_SERVER_PORT" in process.env) ? process.env.REACT_APP_SERVER_PORT : 5001;
+      const result = await fetch(`http://${host}:${port}/execute`, {
         method: "POST",
         headers: { "Content-Type": "application/json" },
         body: JSON.stringify({