~/my-project
├── base                   # 【基础层】存放通用的资源定义
    ├── app                # 开发环境
│   │   ├── deployment.yaml
│   │   ├── service.yaml
│   └── └── kustomization.yaml
└── overlays               # 【覆盖层】存放各环境的差异化配置
    ├── dev                # 开发环境
    │   ├── common
    │   │   ├── config.properties
    │   │   ├── secret.env
    │   └── └── kustomization.yaml
    │   ├── app
    │   │   ├── ...
    │   └── └── kustomization.yaml
    └── prod               # 生产环境
    │   ├── common
    │   │   ├── config.properties
    │   │   ├── secret.env
    │   └── └── kustomization.yaml
    │   ├── app
    │   │   ├── ...
    │   └── └── kustomization.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-app
spec:
  # 注意：副本数等差异化配置可以在这里留空或设默认值，在 overlay 中覆盖
  replicas: 1
  selector:
    matchLabels:
      app: my-app
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers:
      - name: app
        image: nginx:1.14.2
        ports:
        - containerPort: 80

apiVersion: v1
kind: Service
metadata:
  name: my-app
spec:
  selector:
    app: my-app
  ports:
  - protocol: TCP
    port: 80
    targetPort: 80

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization

# 包含的资源文件
resources:
- deployment.yaml
- service.yaml

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization

# 【更新点】使用 resources 引用 base 目录
resources:
- ../../base
- ../common

# 命名空间和名称前缀
namespace: my-project-dev
namePrefix: dev-

patches:
- path: patch-replicas.yaml
  target:
    kind: Deployment
    name: my-app

# 镜像修改（推荐方式，无需修改 deployment.yaml）
images:
- name: nginx
  newTag: "1.19-alpine"
  
# includeSelectors: true 表示这些标签也会被添加到 selector 中
labels:
- pairs:
    app: my-app
  includeSelectors: true 

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-app
spec:
  replicas: 1
  template:
    spec:
      containers:
      - name: app
        env:
        - name: ENV
          value: "development"

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization

resources:
- ../../base  
- ../common

namespace: my-project-prod

# 直接在 kustomization.yaml 中内联 Patch（适合简单修改）
patches:
- target:
    kind: Deployment
    name: my-app
  patch: |-
    - op: replace
      path: /spec/replicas
      value: 3

# 【高级功能】ConfigMap Generator
# Kustomize 会自动为 ConfigMap 名称添加哈希后缀
# 当内容变化时，哈希变化，Deployment 也会自动滚动更新
configMapGenerator:
- name: app-config
  files:
  - config.properties
    
# 服务特定的 SecretsecretGenerator:  
- name: sapi-test-secret  
  envs:  
  - secret.env
  # 禁止自动添加hash后缀的行为
  options:  
    disableNameSuffixHash: true
  
# includeSelectors: true 表示这些标签也会被添加到 selector 中
labels:
- pairs:
    app: my-app
  includeSelectors: true