backend scaffold

2026-08-17 15:31:27 +08:00
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+# Dev：跑在公司内网一台 Ubuntu 服务器的 k3s 上，不接 CI/CD，由 scripts/deploy-dev.sh 手动 apply
+# （见 09-build-deploy.md「环境层级」）。
+#
+# 跟 UAT/Prod 的两处有意差别：
+#   1. replicas: 1 —— 单节点 k3s，起两个副本没有可用性收益，只是多占内存；
+#      代价是滚动更新期间会有短暂不可用，Dev 环境可以接受，所以也不配 PDB。
+#   2. requests 调小 —— 这台机器上还跑着别的东西。
+# 其余（探针、优雅停机、securityContext）与另外两份保持一致，
+# 这正是 Dev 用真 K8s 而不是 docker compose 的意义：验证的是真实部署行为。
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: conti-backend
+  namespace: retailapp-dev
+  labels:
+    app: conti-backend
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: conti-backend
+  strategy:
+    type: RollingUpdate
+    rollingUpdate:
+      maxUnavailable: 0
+      maxSurge: 1
+  template:
+    metadata:
+      labels:
+        app: conti-backend
+    spec:
+      serviceAccountName: conti-backend
+      terminationGracePeriodSeconds: 45
+      securityContext:
+        runAsNonRoot: true
+        seccompProfile:
+          type: RuntimeDefault
+      containers:
+        - name: conti-backend
+          image: registry.example.com/conti-backend:__TAG__
+          ports:
+            - name: http
+              containerPort: 8080
+          env:
+            - name: SPRING_PROFILES_ACTIVE
+              value: dev
+          envFrom:
+            - configMapRef:
+                name: conti-backend-env
+            # Dev 的 Secret 是写死的假值，由 scripts/deploy-dev.sh 创建，不接 Key Vault
+            - secretRef:
+                name: conti-backend-secret
+          securityContext:
+            allowPrivilegeEscalation: false
+            readOnlyRootFilesystem: true
+            capabilities:
+              drop: ["ALL"]
+          resources:
+            requests:
+              cpu: "250m"
+              memory: "768Mi"
+            limits:
+              memory: "1536Mi"
+          startupProbe:
+            httpGet:
+              path: /actuator/health/liveness
+              port: 8080
+            periodSeconds: 5
+            failureThreshold: 30
+          livenessProbe:
+            httpGet:
+              path: /actuator/health/liveness
+              port: 8080
+            periodSeconds: 10
+          readinessProbe:
+            httpGet:
+              path: /actuator/health/readiness
+              port: 8080
+            periodSeconds: 5
+          lifecycle:
+            preStop:
+              exec:
+                command: ["sh", "-c", "sleep 10"]
+          volumeMounts:
+            - name: tmp
+              mountPath: /tmp
+      volumes:
+        - name: tmp
+          emptyDir: {}
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: conti-backend
+  namespace: retailapp-dev
+  labels:
+    app: conti-backend
+spec:
+  selector:
+    app: conti-backend
+  ports:
+    - name: http
+      port: 80
+      targetPort: 8080