add Zadig System ArchitectureOverview

Signed-off-by: landylee007 <liqian@koderover.com>

README-zh-CN.md

@@ -42,6 +42,8 @@ Zadig 是一款面向开发者设计的云原生持续交付(Continuous Delivery
 
 ![业务架构图](./Zadig-Business-Architecture-zh.jpg)
 
+想了解更多系统架构信息，参考 [系统架构简介](System-Architecture-Overview-zh-CN.md).
+
 产品特性介绍：
 
 <details>

README.md

@@ -41,10 +41,12 @@ Zadig is non-invasive, it does not exclude any of your existing development proc
 > Our vision is: Developer + Zadig = Business success
 
 
-The architecture is as follows:
+The business architecture is as follows:
 
 ![Business Architecture](./Zadig-Business-Architecture.jpg)
 
+For more details about system architecture, see [Zadig System Architecture Overview](System-Architecture-Overview.md).
+
 The Highlighted Features:
 
 <details>

System-Architecture-Overview-zh-CN.md

+# Zadig 系统架构简介
+
+## 系统架构图
+
+![Architecture_diagram](./Zadig-System-Architecture.svg)
+
+## 核心组件介绍
+
+用户入口：
+- zadig-portal：zadig 前端组件
+- kodespace：zadig 开发者命令行工具
+- Zadig Toolkit：vscode 开发者插件
+
+API 网关：
+- Gloo Edge：Zadig 的 API 网关组件
+- OPA：认证和授权组件
+- User：用户管理，Token 生成
+- Dex：Zadig 的身份认证服务，用于连接其他第三方认证系统，比如 AD，LDAP，OAuth2，GitHub，...
+
+Zadig 核心业务：
+- Picket：数据聚合服务
+- Policy：OPA 数据源，策略注册中心
+- Aslan：项目，环境，服务，工作流，构建配置，系统配置等系统功能
+- Config: 系统配置
+- Workflow Runner：
+  - warpdrive：工作流引擎，负责 reaper、predator 实例的创建销毁等管理操作
+  - reaper: 负责执行单个工作流作业中的构建、测试等任务
+  - predator：负责执行单个工作流作业中的镜像分发任务
+  - plugins：工作流插件
+    - Jenkins-plugin: 用于触发 Jenkins job，显示状态和结果等
+- cron：定时任务，包括环境的回收，K8s 资源的清理等
+- nsq：消息队列（第三方组件）
+
+数据平面：
+- mongodb：业务数据数据库
+- mysql：存储 dex 配置、用户信息的数据库
+
+K8s 集群：
+- Zadig 业务运行在各种云厂商的标准 K8s 集群
\ No newline at end of file

System-Architecture-Overview.md

+# Zadig System Architecture Overview
+
+## System Architecture
+
+![Architecture_diagram](./Zadig-System-Architecture.svg)
+
+## Main Components
+
+User Interface：
+- zadig-portal：zadig web component
+- kodespace：zadig command line tools
+- Zadig Toolkit：vscode plugin
+
+API Gateway：
+- Gloo Edge：Zadig API gateway
+- OPA：Authentication  and authorization
+- User：User management, token generation
+- Dex：Identity service for Zadig, acts as a portal to other identity providers like AD, LDAP, OAuth2, GitHub, ...
+
+Zadig Core：
+- Picket：backend for frontend service.
+- Policy:  data source of OPA and policy registration center.
+- Aslan：main service for all business logic. Project, environment, service, workflow, build, system management are all in this service.
+- Config: system configuration center.
+
+- Workflow Runner：
+  - warpdrive：workflow engine, manages reaper and predator
+  - reaper: workflow runner. Used for building, testing tasks.
+  - predator：workflow runner. Used for distribute tasks.
+  - plugins：workflow plugins
+    - Jenkins-plugin: workflow runner. Used as connector to trigger Jenkins job and retrieve job information.
+- cron：cronjob runner
+- nsq：message queue
+
+Data Plane：
+- mongodb：database for business data.
+- mysql：dex configuration,database for user.
+
+Kubernetes Cluster：
+- Zadig business runs on standard K8s clusters from cloud vendors