add kubenetes instructions

README.md

@@ -27,6 +27,23 @@ docker run -p 80:80 --rm --name ttt-demo ttt
 
 ... or via Docker Compose: `docker-compose up`.
 
+### Via Kubernetes
+
+I will be using [minikube](https://minikube.sigs.k8s.io/) in this walkthrough. I will be using the local Docker Registry as the source of the Kubenetes image.
+
+```shell
+# Start the cluster:
+minikube start
+# Register the Docker Registry to minikube -- This is because we will be building the image from the Dockerfile for Kubenetes:
+eval $(minikube docker-env)
+# Build the Docker image for Kubenetes:
+docker build -t ttt .
+# Apply the Deployment (which manages the Pods/"virtual hosts" in the minikube cluster for the app) as well as the Service (which is a Load Balancer in this case that exposes the web app in the Pods) using the manifest file:
+kubectl apply -f kubernetes-manifest.yml
+# Access the web app:
+minikube service ttt-demo-service
+```
+
 ## Usage
 
 To post a new article, simply upload your `txt` file to `content/`.

kubernetes-manifest.yml

@@ -0,0 +1,32 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: ttt-demo-deployment
+spec:
+  selector:
+    matchLabels:
+      run: ttt-demo # This selects the Pod Template defined below.
+  replicas: 2 # num of pods matching the template
+  template:
+    metadata:
+      labels:
+        run: ttt-demo # This labels/identifies this template as "run: ttt-demo".
+    spec:
+      containers:
+      - name: ttt-container
+        image: ttt:latest
+        imagePullPolicy: Never # required since we are using a local Docker registry
+        ports:
+        - containerPort: 80
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: ttt-demo-service
+spec:
+  selector:
+    run: ttt-demo # This selects the pods defined in the Deployment above.
+  type: LoadBalancer
+  ports:
+  - port: 80
+    targetPort: 80