# api-gateway Deployment + Service 骨架
# 生产环境请通过 Helm Chart 管理，此处仅作骨架参考
apiVersion: apps/v1
kind: Deployment
metadata:
  name: api-gateway
  namespace: edu-services
  labels:
    app.kubernetes.io/name: api-gateway
    app.kubernetes.io/part-of: edu-platform
    app.kubernetes.io/component: gateway
spec:
  replicas: 2
  selector:
    matchLabels:
      app.kubernetes.io/name: api-gateway
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
  template:
    metadata:
      labels:
        app.kubernetes.io/name: api-gateway
        app.kubernetes.io/part-of: edu-platform
        app.kubernetes.io/component: gateway
      annotations:
        prometheus.io/scrape: "true"
        prometheus.io/port: "8080"
        prometheus.io/path: "/metrics"
    spec:
      containers:
        - name: api-gateway
          image: edu/api-gateway:latest  # 生产请固定 tag，避免 latest
          imagePullPolicy: IfNotPresent
          ports:
            - name: http
              containerPort: 8080
              protocol: TCP
          # 存活探针：失败触发重启
          livenessProbe:
            httpGet:
              path: /healthz
              port: http
            initialDelaySeconds: 15
            periodSeconds: 20
            timeoutSeconds: 3
            failureThreshold: 3
          # 就绪探针：失败从 Service Endpoints 摘除
          readinessProbe:
            httpGet:
              path: /readyz
              port: http
            initialDelaySeconds: 5
            periodSeconds: 10
            timeoutSeconds: 3
            failureThreshold: 2
          resources:
            requests:
              cpu: "250m"
              memory: "256Mi"
            limits:
              cpu: "1000m"
              memory: "1Gi"
          env:
            # 从 ConfigMap 引用非敏感配置
            - name: NODE_ENV
              valueFrom:
                configMapKeyRef:
                  name: api-gateway-config
                  key: NODE_ENV
            - name: LOG_LEVEL
              valueFrom:
                configMapKeyRef:
                  name: api-gateway-config
                  key: LOG_LEVEL
            - name: MYSQL_HOST
              valueFrom:
                configMapKeyRef:
                  name: api-gateway-config
                  key: MYSQL_HOST
            # 从 Secret 引用敏感配置
            - name: MYSQL_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: api-gateway-secret
                  key: MYSQL_PASSWORD
            - name: JWT_SECRET
              valueFrom:
                secretKeyRef:
                  name: api-gateway-secret
                  key: JWT_SECRET
            - name: REDIS_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: api-gateway-secret
                  key: REDIS_PASSWORD
          # 生产建议挂载 /tmp 并设置 readOnlyRootFilesystem: true
          securityContext:
            runAsNonRoot: true
            runAsUser: 1000
            allowPrivilegeEscalation: false
            capabilities:
              drop: ["ALL"]
---
# api-gateway Service（ClusterIP）
apiVersion: v1
kind: Service
metadata:
  name: api-gateway
  namespace: edu-services
  labels:
    app.kubernetes.io/name: api-gateway
    app.kubernetes.io/part-of: edu-platform
    app.kubernetes.io/component: gateway
spec:
  type: ClusterIP
  selector:
    app.kubernetes.io/name: api-gateway
  ports:
    - name: http
      port: 8080
      targetPort: http
      protocol: TCP