Feature

Dockerfile

@@ -0,0 +1,20 @@
+# Use the official Node.js 14 image as the base image
+FROM node:14
+
+# Set the working directory inside the container
+WORKDIR /app
+
+# Copy package.json and package-lock.json to the working directory
+COPY package*.json ./
+
+# Install dependencies
+RUN npm install
+
+# Copy the rest of the application code to the working directory
+COPY . .
+
+# Expose port 4000 (assuming your Node.js application listens on this port)
+EXPOSE 4000
+
+# Set the command to run when the container starts
+CMD ["npm", "start"]

README.md

@@ -1,7 +1,7 @@
 # Simple Node Express Hello World App
 
 
-![localhost:3000](/public/images/localhost_3000.png?raw=true "Node & Express")
+![localhost:4000](/public/images/localhost_4000.png?raw=true "Node & Express")
 
 # Steps :
 ```
@@ -10,6 +10,25 @@
   npm install
   npm start
 
-  Go to localhost:3000
+  Go to localhost:4000
 
 ```  
+# Prerequisites : 
+## Running kubernetes cluster 
+make sure you have running kubernetes cluster on cloud or on hosted locally (kind - minikube ..etc)
+## Install liknkerd 
+https://www.digitalocean.com/community/tutorials/how-to-install-and-use-linkerd-with-kubernetes 
+## Install Linkerd-SMI extension for canary deployment 
+https://linkerd.io/2.15/tasks/linkerd-smi/#install-the-linkerd-smi-extension   
+
+# Usage : 
+
+```
+   kubectl create ns <ns-name>
+   kubectl annotate ns <ns-name> linkerd.io/inject=enabled
+   cd node-express-hello-world/k8s 
+   kubectl apply -f version-I -n <ns-name>
+   kubectl apply -f version-II -n <ns-name>
+   kubectl apply -f traffic-split.yaml -n <ns-name>
+
+```

app.js

@@ -9,7 +9,7 @@ app.use(express.static(__dirname + '/public'));
 
 app.get('/',routes.home);
 
-var port = process.env.PORT || 3000;
+var port = process.env.PORT || 4000;
 
 var server=app.listen(port,function(req,res){
     console.log("Catch the action at http://localhost:"+port);

k8s/traffic-split.yaml

@@ -0,0 +1,12 @@
+apiVersion: split.smi-spec.io/v1alpha1
+kind: TrafficSplit
+metadata:
+  name: my-app-traffic-split
+  namespace: node
+spec:
+  service: my-app-service
+  backends:
+    - service: my-app-service-v1
+      weight: 50m
+    - service: my-app-service-v2
+      weight: 50m

k8s/version-I/deploy.yaml

@@ -0,0 +1,23 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: my-app-v1
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: my-app
+      version: v1
+  template:
+    metadata:
+      labels:
+        app: my-app
+        version: v1
+      annotations:
+        linkerd.io/inject: enabled
+    spec:
+      containers:
+        - name: my-app
+          image: ahmednageh08/node-app:v1
+          ports:
+            - containerPort: 4000

k8s/version-I/svc.yaml

@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: my-app-service-v1
+spec:
+  selector:
+    app: my-app
+    version: v1
+  ports:
+    - protocol: TCP
+      port: 4000
+      targetPort: 4000

k8s/version-II/deploy.yaml

@@ -0,0 +1,23 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: my-app-v2
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: my-app
+      version: v2
+  template:
+    metadata:
+      labels:
+        app: my-app
+        version: v2
+      annotations:
+        linkerd.io/inject: enabled
+    spec:
+      containers:
+        - name: my-app
+          image: ahmednageh08/node-app:v2
+          ports:
+            - containerPort: 4000

k8s/version-II/svc.yaml

@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: my-app-service-v2
+spec:
+  selector:
+    app: my-app
+    version: v2
+  ports:
+    - protocol: TCP
+      port: 4000
+      targetPort: 4000

playbook.yaml

@@ -0,0 +1,28 @@
+- name: Deploy and run Node.js application
+  hosts: all
+  become: true
+
+  tasks:
+    - name: Clone Node.js application repository
+      git:
+        repo: https://github.com/AhmedNageh08/node-express-hello-world.git
+        dest: /opt/node-express-hello-world
+        version: master
+        force: yes
+
+    - name: Install npm package
+      apt:
+        name: npm
+        state: present
+
+    - name: Install App dependencies
+      command: npm install
+      args:
+        chdir: /opt/node-express-hello-world
+
+    - name: Start Node.js application in detached mode
+      shell: >
+        cd /opt/node-express-hello-world && 
+        nohup npm start &> /dev/null &
+        echo $! > /var/run/node-express-hello-world.pid
+

views/home.ejs

@@ -1 +1 @@
-<h1 align="center">Heyyo :)</h1>
+<h1 align="center">Hey Devops Team :)</h1>