feat: gaie helm chart based example (#2168)

Signed-off-by: Biswa Panda <biswa.panda@gmail.com>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: biswapanda

deploy/inference-gateway/README.md

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+## Inference Gateway Setup with Dynamo
+
+This Setup treats each Dynamo deployment as a black box and routes traffic randomly among the deployments.
+Currently, this setup is only kgateway based Inference Gateway.
+
+## Table of Contents
+
+- [Prerequisites](#prerequisites)
+- [Installation Steps](#installation-steps)
+- [Usage](#usage)
+
+## Prerequisites
+
+- Kubernetes cluster with kubectl configured
+- NVIDIA GPU drivers installed on worker nodes
+
+## Installation Steps
+
+1. **Install Dynamo Platform**
+
+[See Quickstart Guide](../../../docs/guides/dynamo_deploy/quickstart.md) to install Dynamo Cloud.
+
+
+2. **Deploy Inference Gateway**
+
+First, deploy an inference gateway service. In this example, we'll install `kgateway` based gateway implementation.
+You can use the script below or follow the steps manually.
+
+Script:
+```bash
+./install_gaie_crd_kgateway.sh
+```
+
+Manual steps:
+
+a. Deploy the Gateway API CRDs:
+```bash
+GATEWAY_API_VERSION=v1.3.0
+kubectl apply -f https://github.com/kubernetes-sigs/gateway-api/releases/download/$GATEWAY_API_VERSION/standard-install.yaml
+```
+
+b. Install the Inference Extension CRDs (Inferenece Model and Inference Pool CRDs)
+```bash
+INFERENCE_EXTENSION_VERSION=v0.5.1
+kubectl apply -f https://github.com/kubernetes-sigs/gateway-api-inference-extension/releases/download/$INFERENCE_EXTENSION_VERSION/manifests.yaml -n  my-model
+```
+
+c. Install `kgateway` CRDs and kgateway.
+```bash
+KGATEWAY_VERSION=v2.0.3
+
+# Install the Kgateway CRDs
+helm upgrade -i --create-namespace --namespace kgateway-system --version $KGATEWAY_VERSION kgateway-crds oci://cr.kgateway.dev/kgateway-dev/charts/kgateway-crds
+
+# Install Kgateway
+helm upgrade -i --namespace kgateway-system --version $KGATEWAY_VERSION kgateway oci://cr.kgateway.dev/kgateway-dev/charts/kgateway --set inferenceExtension.enabled=true
+```
+
+d. Deploy the Gateway Instance
+```bash
+kubectl create namespace my-model
+kubectl apply -f https://github.com/kubernetes-sigs/gateway-api-inference-extension/raw/main/config/manifests/gateway/kgateway/gateway.yaml -n  my-model
+```
+
+```bash
+kubectl get gateway inference-gateway -n my-model
+
+# Sample output
+# NAME                CLASS      ADDRESS   PROGRAMMED   AGE
+# inference-gateway   kgateway   x.x.x.x   True         1m
+```
+
+3. **Install dynamo model and dynamo gaie helm chart**
+
+The Inference Gateway is configured through the `inference-gateway-resources.yaml` file.
+
+Deploy the Inference Gateway resources to your Kubernetes cluster:
+
+```bash
+cd deploy/inference-gateway
+helm install dynamo-gaie ./helm/dynamo-gaie -n my-model -f ./vllm_agg_qwen.yaml
+```
+
+Key configurations include:
+- An InferenceModel resource for the Qwen model
+- A service for the inference gateway
+- Required RBAC roles and bindings
+- RBAC permissions
+
+5. **Verify Installation**
+
+Check that all resources are properly deployed:
+
+```bash
+kubectl get inferencepool
+kubectl get inferencemodel
+kubectl get httproute
+kubectl get service
+kubectl get gateway
+```
+
+Sample output:
+
+```bash
+# kubectl get inferencepool
+NAME        AGE
+qwen-pool   33m
+
+# kubectl get inferencemodel
+NAME         MODEL NAME        INFERENCE POOL   CRITICALITY   AGE
+qwen-model   Qwen/Qwen3-0.6B   qwen-pool        Critical      33m
+
+# kubectl get httproute
+NAME        HOSTNAMES   AGE
+qwen-route               33m
+```
+
+## Usage
+
+The Inference Gateway provides HTTP endpoints for model inference.
+
+### 1: Populate gateway URL for your k8s cluster
+```bash
+export GATEWAY_URL=<Gateway-URL>
+```
+
+To test the gateway in minikube, use the following command:
+a. User minikube tunnel to expose the gateway to the host
+   This requires `sudo` access to the host machine. alternatively, you can use port-forward to expose the gateway to the host as shown in alternateive (b).
+```bash
+# in first terminal
+minikube tunnel
+
+# in second terminal where you want to send inference requests
+GATEWAY_URL=$(kubectl get svc inference-gateway -n my-model -o yaml -o jsonpath='{.spec.clusterIP}')
+echo $GATEWAY_URL
+```
+
+b. use port-forward to expose the gateway to the host
+```bash
+# in first terminal
+kubectl port-forward svc/inference-gateway 8000:80 -n my-model
+
+# in second terminal where you want to send inference requests
+GATEWAY_URL=http://localhost:8000
+```
+
+### 2: Check models deployed to inference gateway
+
+
+a. Query models:
+```bash
+# in the second terminal where you GATEWAY_URL is set
+
+curl $GATEWAY_URL/v1/models | jq .
+```
+Sample output:
+```json
+{
+  "data": [
+    {
+      "created": 1753768323,
+      "id": "Qwen/Qwen3-0.6B",
+      "object": "object",
+      "owned_by": "nvidia"
+    }
+  ],
+  "object": "list"
+}
+```
+
+b. Send inference request to gateway:
+
+```bash
+MODEL_NAME="Qwen/Qwen3-0.6B"
+curl $GATEWAY_URL/v1/chat/completions \
+  -H "Content-Type: application/json" \
+  -d '{
+      "model": "'"${MODEL_NAME}"'",
+      "messages": [
+      {
+          "role": "user",
+          "content": "In the heart of Eldoria, an ancient land of boundless magic and mysterious creatures, lies the long-forgotten city of Aeloria. Once a beacon of knowledge and power, Aeloria was buried beneath the shifting sands of time, lost to the world for centuries. You are an intrepid explorer, known for your unparalleled curiosity and courage, who has stumbled upon an ancient map hinting at ests that Aeloria holds a secret so profound that it has the potential to reshape the very fabric of reality. Your journey will take you through treacherous deserts, enchanted forests, and across perilous mountain ranges. Your Task: Character Background: Develop a detailed background for your character. Describe their motivations for seeking out Aeloria, their skills and weaknesses, and any personal connections to the ancient city or its legends. Are they driven by a quest for knowledge, a search for lost familt clue is hidden."
+      }
+      ],
+      "stream":false,
+      "max_tokens": 30,
+      "temperature": 0.0
+    }'
+```
+
+Sample inference output:
+
+```json
+{
+  "choices": [
+    {
+      "finish_reason": "stop",
+      "index": 0,
+      "logprobs": null,
+      "message": {
+        "audio": null,
+        "content": "<think>\nOkay, I need to develop a character background for the user's query. Let me start by understanding the requirements. The character is an",
+        "function_call": null,
+        "refusal": null,
+        "role": "assistant",
+        "tool_calls": null
+      }
+    }
+  ],
+  "created": 1753768682,
+  "id": "chatcmpl-772289b8-5998-4f6d-bd61-3659b684b347",
+  "model": "Qwen/Qwen3-0.6B",
+  "object": "chat.completion",
+  "service_tier": null,
+  "system_fingerprint": null,
+  "usage": {
+    "completion_tokens": 29,
+    "completion_tokens_details": null,
+    "prompt_tokens": 196,
+    "prompt_tokens_details": null,
+    "total_tokens": 225
+  }
+}
+```

deploy/inference-gateway/example/README.md

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+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/