AI Example model serving tensorflow (#563)

* Create AI Example model serving tensorflow

* ai/model-serving-tensorflow service.yaml

* ai/model-serving-tensorflow ingress.yaml

* ai/model-serving-tensorflow pv.yaml

* ai/model-serving-tensorflow pvc.yaml

* Create Readme.md

* Rename Readme.md to README.md

* Update with structure format for README.md

* Correct link for serving in ai/model-serving-tensorflow/README.md

Co-authored-by: Janet Kuo <chiachenk@google.com>

* Fix kubectl README.md

* Update README.md

* Update as per comments README.md

* Update tensorflow/serving:2.19.0 deployment.yaml

* remove hostname ai/model-serving-tensorflow/ingress.yaml

---------

Co-authored-by: Janet Kuo <chiachenk@google.com>

ai/model-serving-tensorflow/README.md

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+# TensorFlow Model Serving on Kubernetes
+
+## 1 Purpose / What You'll Learn
+
+This example demonstrates how to deploy a TensorFlow model for inference using [TensorFlow Serving](https://www.tensorflow.org/serving) on Kubernetes. You’ll learn how to:
+
+- Set up TensorFlow Serving with a pre-trained model
+- Use a PersistentVolume to mount your model directory
+- Expose the inference endpoint using a Kubernetes `Service` and `Ingress`
+- Send a sample prediction request to the model
+
+---
+
+## 📚 Table of Contents
+
+- [Prerequisites](#prerequisites)
+- [Quick Start / TL;DR](#quick-start--tldr)
+- [Detailed Steps & Explanation](#detailed-steps--explanation)
+- [Verification / Seeing it Work](#verification--seeing-it-work)
+- [Configuration Customization](#configuration-customization)
+- [Cleanup](#cleanup)
+- [Further Reading / Next Steps](#further-reading--next-steps)
+
+---
+
+## ⚙️ Prerequisites
+
+- Kubernetes cluster (tested with v1.29+)
+- `kubectl` configured
+- Optional: `ingress-nginx` for external access
+- x86-based machine (for running TensorFlow Serving image)
+- Local hostPath support (for demo) or a cloud-based PVC
+
+---
+
+## ⚡ Quick Start / TL;DR
+
+```bash
+
+# Apply manifests
+kubectl apply -f https://raw.githubusercontent.com/kubernetes/examples/refs/heads/master/ai/model-serving-tensorflow/pv.yaml
+kubectl apply -f https://raw.githubusercontent.com/kubernetes/examples/refs/heads/master/ai/model-serving-tensorflow/pvc.yaml
+kubectl apply -f https://raw.githubusercontent.com/kubernetes/examples/refs/heads/master/ai/model-serving-tensorflow/deployment.yaml
+kubectl apply -f https://raw.githubusercontent.com/kubernetes/examples/refs/heads/master/ai/model-serving-tensorflow/service.yaml
+kubectl apply -f https://raw.githubusercontent.com/kubernetes/examples/refs/heads/master/ai/model-serving-tensorflow/ingress.yaml  # Optional
+```
+
+---
+
+## 2. Expose the Servic
+
+### 1. PersistentVolume & PVC Setup
+
+> ⚠️ Note: For local testing, `hostPath` is used to mount `/mnt/models/my_model`. In production, replace this with a cloud-native storage backend (e.g., AWS EBS, GCP PD, or NFS).
+
+
+Model folder structure:
+```
+/mnt/models/my_model/
+└── 1/
+    ├── saved_model.pb
+    └── variables/
+```
+
+---
+
+### 2. Expose the Service
+
+- A `ClusterIP` service exposes gRPC (8500) and REST (8501).
+- An optional `Ingress` exposes `/tf/v1/models/my_model:predict` to external clients.
+
+Update the `host` value in `ingress.yaml` to match your domain.
+
+---
+
+## 3 Verification / Seeing it Work
+
+If using ingress:
+
+```bash
+curl -X POST http://<ingress-host>/tf/v1/models/my_model:predict \
+  -H "Content-Type: application/json" \
+  -d '{ "instances": [[1.0, 2.0, 5.0]] }'
+```
+
+Expected output:
+
+```json
+{
+  "predictions": [...]
+}
+```
+
+To verify the pod is running:
+
+```bash
+kubectl get pods
+kubectl wait --for=condition=Available deployment/tf-serving --timeout=300s
+kubectl logs deployment/tf-serving
+```
+
+---
+
+## 🛠️ Configuration Customization
+
+- Update `model_name` and `model_base_path` in the deployment
+- Replace `hostPath` with `PersistentVolumeClaim` bound to cloud storage
+- Modify resource requests/limits for TensorFlow container
+
+---
+
+## 🧹 Cleanup
+
+```bash
+kubectl delete -f https://raw.githubusercontent.com/kubernetes/examples/refs/heads/master/ai/model-serving-tensorflow/ingress.yaml  # Optional
+kubectl delete -f https://raw.githubusercontent.com/kubernetes/examples/refs/heads/master/ai/model-serving-tensorflow/service.yaml
+kubectl delete -f https://raw.githubusercontent.com/kubernetes/examples/refs/heads/master/ai/model-serving-tensorflow/deployment.yaml
+kubectl delete -f https://raw.githubusercontent.com/kubernetes/examples/refs/heads/master/ai/model-serving-tensorflow/pvc.yaml
+kubectl delete -f https://raw.githubusercontent.com/kubernetes/examples/refs/heads/master/ai/model-serving-tensorflow/pv.yaml
+
+```
+
+---
+
+## 4 Further Reading / Next Steps
+
+- [TensorFlow Serving](https://www.tensorflow.org/tfx/serving)
+- [TF Serving REST API Reference](https://www.tensorflow.org/tfx/serving/api_rest)
+- [Kubernetes Ingress Controller](https://kubernetes.io/docs/concepts/services-networking/ingress-controllers/)
+- [Persistent Volumes](https://kubernetes.io/docs/concepts/storage/persistent-volumes/)
+
+

ai/model-serving-tensorflow/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: tf-serving
+  labels:
+    app: tf-serving
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: tf-serving
+  template:
+    metadata:
+      labels:
+        app: tf-serving
+    spec:
+      containers:
+        - name: tensorflow-serving
+          image: tensorflow/serving:2.19.0
+          args:
+            - "--model_name=my_model"
+            - "--port=8500"
+            - "--rest_api_port=8501"
+            - "--model_base_path=/models/my_model"
+          ports:
+            - containerPort: 8500  # gRPC
+            - containerPort: 8501  # REST
+          volumeMounts:
+            - name: model-volume
+              mountPath: /models/my_model
+      volumes:
+        - name: model-volume
+          persistentVolumeClaim:
+            claimName: my-model-pvc

ai/model-serving-tensorflow/ingress.yaml

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+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: tf-serving-ingress
+  annotations:
+    nginx.ingress.kubernetes.io/rewrite-target: /$2
+spec:
+  rules:
+    - http:
+        paths:
+          - path: /tf(/|$)(.*)
+            pathType: Prefix
+            backend:
+              service:
+                name: tf-serving
+                port:
+                  number: 8501

ai/model-serving-tensorflow/pv.yaml

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+apiVersion: v1
+kind: PersistentVolume
+metadata:
+  name: my-model-pv
+spec:
+  capacity:
+    storage: 1Gi
+  accessModes:
+    - ReadOnlyMany
+  persistentVolumeReclaimPolicy: Retain
+  hostPath:
+    path: /mnt/models/my_model

ai/model-serving-tensorflow/pvc.yaml

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+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: my-model-pvc
+spec:
+  accessModes:
+    - ReadOnlyMany
+  resources:
+    requests:
+      storage: 1Gi
+  volumeName: my-model-pv

ai/model-serving-tensorflow/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: tf-serving
+spec:
+  selector:
+    app: tf-serving
+  ports:
+    - name: grpc
+      port: 8500
+      targetPort: 8500
+    - name: rest
+      port: 8501
+      targetPort: 8501
+  type: ClusterIP