Add deploy_sample

deploy_sample/app/.dockerignore

@@ -0,0 +1,34 @@
+# Include any files or directories that you don't want to be copied to your
+# container here (e.g., local build artifacts, temporary files, etc.).
+#
+# For more help, visit the .dockerignore file reference guide at
+# https://docs.docker.com/go/build-context-dockerignore/
+
+**/.classpath
+**/.dockerignore
+**/.env
+**/.git
+**/.gitignore
+**/.project
+**/.settings
+**/.toolstarget
+**/.vs
+**/.vscode
+**/.next
+**/.cache
+**/*.*proj.user
+**/*.dbmdl
+**/*.jfm
+**/charts
+**/docker-compose*
+**/compose.y*ml
+**/Dockerfile*
+**/node_modules
+**/npm-debug.log
+**/obj
+**/secrets.dev.yaml
+**/values.dev.yaml
+**/build
+**/dist
+LICENSE
+README.md

deploy_sample/app/.gitignore

@@ -0,0 +1 @@
+node_modules

deploy_sample/app/Dockerfile

@@ -0,0 +1,38 @@
+# syntax=docker/dockerfile:1
+
+# Comments are provided throughout this file to help you get started.
+# If you need more help, visit the Dockerfile reference guide at
+# https://docs.docker.com/go/dockerfile-reference/
+
+# Want to help us make this template better? Share your feedback here: https://forms.gle/ybq9Krt8jtBL3iCk7
+
+ARG NODE_VERSION=20.18.0
+
+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.
+# Leverage a cache mount to /root/.npm to speed up subsequent builds.
+# Leverage a bind mounts to package.json and package-lock.json to avoid having to copy them into
+# into this layer.
+RUN --mount=type=bind,source=package.json,target=package.json \
+    --mount=type=bind,source=package-lock.json,target=package-lock.json \
+    --mount=type=cache,target=/root/.npm \
+    npm ci --omit=dev
+
+# Run the application as a non-root user.
+USER node
+
+# Copy the rest of the source files into the image.
+COPY . .
+
+# Expose the port that the application listens on.
+EXPOSE 8080
+
+# Run the application.
+CMD ["node", "index.js"]

deploy_sample/app/README.Docker.md

@@ -0,0 +1,22 @@
+### Building and running your application
+
+When you're ready, start your application by running:
+`docker compose up --build`.
+
+Your application will be available at http://localhost:8080.
+
+### Deploying your application to the cloud
+
+First, build your image, e.g.: `docker build -t myapp .`.
+If your cloud uses a different CPU architecture than your development
+machine (e.g., you are on a Mac M1 and your cloud provider is amd64),
+you'll want to build the image for that platform, e.g.:
+`docker build --platform=linux/amd64 -t myapp .`.
+
+Then, push it to your registry, e.g. `docker push myregistry.com/myapp`.
+
+Consult Docker's [getting started](https://docs.docker.com/go/get-started-sharing/)
+docs for more detail on building and pushing.
+
+### References
+* [Docker's Node.js guide](https://docs.docker.com/language/nodejs/)

deploy_sample/app/compose.yaml

@@ -0,0 +1,51 @@
+# Comments are provided throughout this file to help you get started.
+# If you need more help, visit the Docker Compose reference guide at
+# https://docs.docker.com/go/compose-spec-reference/
+
+# Here the instructions define your application as a service called "server".
+# This service is built from the Dockerfile in the current directory.
+# You can add other services your application may depend on here, such as a
+# database or a cache. For examples, see the Awesome Compose repository:
+# https://github.com/docker/awesome-compose
+services:
+  server:
+    build:
+      context: .
+    environment:
+      NODE_ENV: production
+    ports:
+      - 8080:8080
+
+# 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
+

deploy_sample/app/index.js

@@ -0,0 +1,44 @@
+// Importing express module
+const express = require("express");
+
+const port = 8080;
+const app = express();
+const { networkInterfaces } = require('os');
+const nets = networkInterfaces();
+const results = Object.create(null); // Or just '{}', an empty object
+
+app.use(express.json());
+app.use(express.urlencoded({ extended: true }));
+app.use(express.static('public'));
+
+for (const name of Object.keys(nets)) {
+    for (const net of nets[name]) {
+        // Skip over non-IPv4 and internal (i.e. 127.0.0.1) addresses
+        // 'IPv4' is in Node <= 17, from 18 it's a number 4 or 6
+        const familyV4Value = typeof net.family === 'string' ? 'IPv4' : 4
+        if (net.family === familyV4Value && !net.internal) {
+            if (!results[name]) {
+                results[name] = [];
+            }
+            results[name].push(net.address);
+        }
+    }
+}
+
+// Handling the get request
+app.get("/", (req, res) => {
+    res.send("Hello World");
+});
+
+app.get("/ip", (req, res) => {
+    res.send(results);
+});
+
+// Starting the server on the 80 port
+app.listen(port, () => {
+    console.log(`The application started
+                 successfully on port ${port}`);
+    console.log(`IP address ${JSON.stringify(results)}`);
+});
+
+module.exports = app

deploy_sample/app/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "sample-app",
+  "version": "1.0.0",
+  "description": "Sample app to deploy in kubernetes cluster",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js",
+    "test": "./node_modules/.bin/mocha ./test/test.js"
+  },
+  "author": "Ricardo Montañana",
+  "license": "MIT",
+  "dependencies": {
+    "express": "^4.21.1"
+  },
+  "devDependencies": {
+    "mocha": "^10.7.3",
+    "supertest": "^7.0.0"
+  }
+}

deploy_sample/app/test/test.js

@@ -0,0 +1,19 @@
+var request = require('supertest');
+var app = require('../index.js');
+const net = require('net')
+const assert = require('assert')
+describe("GET /", () => {
+    it('respond with Hello World', () => {
+        request(app).get("/").expect('Hello World');
+        // console.log("Res=", res);
+    });
+});
+describe("GET /ip", () => {
+    it('respond a valid ip address', (done) => {
+        request(app).get("/ip")
+            .set('Accept', 'application/json')
+            .expect('Content-Type', /json/)
+            .expect(200, done);
+            //expect(assert.strictEqual(net.isIPv4("127.0.0.1"), true));
+    });
+});

deploy_sample/yaml/01-hello-app-deployment.yaml

@@ -0,0 +1,21 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: my-app-deployment
+  labels:
+    app: my-app
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: my-app
+  template:
+    metadata:
+      labels:
+        app: my-app
+    spec:
+      containers:
+      - name: my-app-container
+        image: rmontanana/my-app:1.0
+        ports:
+        - containerPort: 8080

deploy_sample/yaml/02-hello-app-service-node-port.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: my-app-service
+  labels:
+    app: my-app
+spec:
+  type: LoadBalancer
+  ports:
+  - protocol: TCP
+    port: 80
+    targetPort: 8080
+  selector:
+    app: my-app
+  type: LoadBalancer