docs: add guidance for setting up the Kind + Istio environment

docs/en/service_discovery_guide/setup_env_en.md

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+# Install Kind & Istio, create a Kubernetes cluster
+
+This guide introduces how to install Kind (Kubernetes in Docker) and Istio on a physical Linux machine, create a Kubernetes cluster using Kind, and finally launch Istio services. It is applicable to both ARM and x86_64 architectures. Developers can experience the k8s service discovery capability of AIGW based on the Kind deployment environment.
+
+## Environmental requirements
+
+- Linux system
+- Install `curl`, `git`, and `bash`
+- Pre-install Docker (Kind uses Docker to create a K8s cluster)
+
+## Step 1: Install Kind
+
+### 1.1 Download Kind
+
+Download the appropriate Kind binary file according to the architecture.
+
+- **x86_64 architecture**:
+
+    ```bash
+    curl -Lo kind https://kind.sigs.k8s.io/dl/v0.23.0/kind-linux-amd64
+    ```
+
+- **ARM architecture**:
+
+    ```bash
+    curl -Lo kind https://kind.sigs.k8s.io/dl/v0.23.0/kind-linux-arm64
+    ```
+
+### 1.2 Install Kind
+
+After the download is complete, grant execute permission and move it to `/usr/local/bin`:
+
+```bash
+chmod +x kind
+sudo mv kind /usr/local/bin/
+```
+
+## 2 Create a Kubernetes cluster
+
+Create a local Kubernetes cluster using Kind.
+```bash
+kind create cluster --name istio-cluster
+```
+
+After the cluster creation is complete, you can verify the cluster status using the following command:
+```bash
+kubectl cluster-info --context kind-istio-cluster
+```
+
+## 3 Installing Istio
+### 3.1 Downloading Istio
+
+Download the Istio installation package according to the architecture.
+- **x86_64 architecture**:
+```bash
+curl -Lo istio.tar.gz https://github.com/istio/istio/releases/download/1.27.3/istio-1.27.3-linux-amd64.tar.gz
+```
+
+- **ARM architecture**:
+```bash
+curl -Lo istio.tar.gz https://github.com/istio/istio/releases/download/1.27.3/istio-1.27.3-linux-arm64.tar.gz
+```
+
+### 3.2 Unzip and install Istio
+```bash
+tar -zxvf istio.tar.gz
+cd istio-1.27.3
+sudo mv bin/istioctl /usr/local/bin/
+```
+
+Verify whether istioctl is successfully installed:
+```bash
+istioctl version
+```
+
+### 3.3 Starting Istio
+Install the Istio control plane using the default configuration of Istio:
+```bash
+istioctl install --set profile=demo -y
+```
+
+Verify Istio installation:
+```bash
+kubectl get pods -n istio-system
+```
+
+Obtain the external IP of the Istio gateway:
+```bash
+kubectl get svc istio-ingressgateway -n istio-system
+```

docs/zh/service_discovery_guide/setup_env_zh.md

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+# 在k8s集群内使用AIGW
+
+本指南介绍如何在 k8s 集群环境下使用 AIGW。首先介绍如何在 Linux 物理机上安装 Kind(Kubernetes in Docker)、Istio，并使用 Kind 创建 Kubernetes 集群并启动 Istio 服务。本文档适用于 ARM 和 x86_64 架构。开发者可以基于 Kind 部署环境，体验 AIGW 的 k8s 服务发现能力。
+
+## 环境要求
+
+- Linux 系统
+- 安装 `curl`、`git` 和 `bash`
+- 预先安装 Docker（Kind 使用 Docker 创建 K8s 集群）
+
+## 1. 安装 Kind
+
+### 1.1 下载 Kind
+
+根据架构下载适合的 Kind 二进制文件。
+
+- **x86_64 架构**:
+
+    ```bash
+    curl -Lo kind https://kind.sigs.k8s.io/dl/v0.23.0/kind-linux-amd64
+    ```
+
+- **ARM 架构**:
+
+    ```bash
+    curl -Lo kind https://kind.sigs.k8s.io/dl/v0.23.0/kind-linux-arm64
+    ```
+
+### 1.2 安装 Kind
+
+下载完成后，赋予执行权限并移动到 `/usr/local/bin` 中：
+
+```bash
+chmod +x kind
+sudo mv kind /usr/local/bin/
+```
+
+## 2. 创建 Kubernetes 集群
+
+使用 Kind 创建一个本地的 Kubernetes 集群。
+```bash
+kind create cluster --name istio-cluster
+```
+
+等待集群创建完成，可以通过以下命令验证集群状态：
+```bash
+kubectl cluster-info --context kind-istio-cluster
+```
+
+## 3. 安装 Istio
+### 3.1 下载 Istio
+
+根据架构下载 Istio 安装包。
+- **x86_64 架构**:
+```bash
+curl -Lo istio.tar.gz https://github.com/istio/istio/releases/download/1.27.3/istio-1.27.3-linux-amd64.tar.gz
+```
+
+- **ARM 架构**:
+```bash
+curl -Lo istio.tar.gz https://github.com/istio/istio/releases/download/1.27.3/istio-1.27.3-linux-arm64.tar.gz
+```
+
+### 3.2 解压并安装 Istio
+```bash
+tar -zxvf istio.tar.gz
+cd istio-1.27.3
+sudo mv bin/istioctl /usr/local/bin/
+```
+
+验证 istioctl 是否安装成功：
+```bash
+istioctl version
+```
+
+## 4. 运行
+### 4.1 启动 Mock Service
+启动Mock Service，作为upstream服务组件被AIGW发现：
+```bash
+make start-mock-service
+```
+
+### 4.2 Docker 模式运行
+#### 启动 Istio & 订阅 k8s Service API
+导出Kind集群配置到./etc目录，供Istio订阅：
+```bash
+kind get kubeconfig --name istio-test > ./etc/kind-kubeconfig.yaml
+```
+
+启动Istio：
+```bash
+make WITH_KIND=ON start-istio
+```
+
+#### 启动AIGW
+启动AIGW，拉起自定义xDS服务器，从Istio Pilot订阅 CDS/EDS 信息，并启动gRPC Server供Envoy拉取。
+服务信息传递流程：Istio Pilot => AIGW 自定义xDS服务器 => Envoy。
+```bash
+make WITH_KIND=ON start-aigw-xds
+```
+
+### 4.3 k8s pod 模式运行
+#### 启动 Istio 加入 k8s 集群
+使用默认配置安装 Istio 控制平面：
+```bash
+istioctl install --set profile=demo -y
+```
+
+验证 Istio 安装：
+```bash
+kubectl get pods -n istio-system
+```
+
+获取 Istio 网关的外部 IP：
+```bash
+kubectl get svc istio-ingressgateway -n istio-system
+```
+
+#### AIGW 加入 k8s 集群