第二重·腾挪篇：云原生轻功身法要诀

【楔子】御风而行的代码江湖

藏经阁青烟袅袅，少年凝视着丹田处流转的金色真气。 "筑基已成，为何仍觉步履沉重？"指尖拂过石壁，惊起三丈外烛火摇曳。虚空突然传来龙吟："气沉丹田，神游太虚。欲达天人合一之境，当习云踪魅影之术！" 《九阳真经》无风自动，第二卷浮现鎏金篆文： "容器化轻功：瞬息千里，分身化影 Kubernetes御剑术：万剑归宗，随心布阵 Helm乾坤袋秘法：一键布下天罗地网"

【心法总纲】云原生三重天境界

1.1 轻功要诀·容器化奥义

"容器者，乾坤挪移之基。一沙一世界，一叶一菩提。"

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# 九阳真经·凌波微步Dockerfile
FROM eclipse-temurin:17-jdk-alpine as builder  # 铸剑炉（构建阶段）
WORKDIR /app
COPY .mvn .mvn
COPY mvnw .
COPY pom.xml .
COPY src src
RUN ./mvnw package -DskipTests  # 内力凝聚（打包）

FROM eclipse-temurin:17-jre-jammy  # 轻功身法（运行阶段）
EXPOSE 8080
VOLUME /tmp
ARG JAR_FILE=target/*.jar
COPY --from=builder /app/${JAR_FILE} app.jar
ENTRYPOINT ["java","-jar","/app.jar"]  # 踏雪无痕（无状态启动）

1.2 御剑真谛·编排之道

"Kubernetes者，万剑归宗之术。一令出而千军动，一念起则四海平。"

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# 九阳真经·万剑归宗Deployment
apiVersion: apps/v1
kind: Deployment
metadata:
  name: sword-service
spec:
  replicas: 3  # 剑阵分身数
  selector:
    matchLabels:
      app: sword
  template:
    metadata:
      labels:
        app: sword
    spec:
      containers:
      - name: sword-container
        image: registry.martialarts.com/sword:1.0.0
        ports:
        - containerPort: 8080
        envFrom:
        - configMapRef:
            name: sword-config  # 剑诀配置
---
apiVersion: v1
kind: Service
metadata:
  name: sword-service
spec:
  selector:
    app: sword
  ports:
  - protocol: TCP
    port: 80
    targetPort: 8080
  type: LoadBalancer  # 剑气外放

1.3 乾坤秘法·包罗万象

"Helm者，袖里乾坤之法。万象皆藏方寸间，弹指星移斗转。"

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# 九阳真经·袖里乾坤诀
helm create martial-arts-chart  # 开辟洞天
helm package ./martial-arts-chart  # 凝练金丹
helm install martial-arts ./martial-arts-1.0.0.tgz  # 洞天展开

【招式拆解】Docker化轻功九式

2.1 镜像瘦身·梯云纵心法

"镜像臃肿如身负千斤，玄铁重剑亦需四两拨千斤。"

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# 九阳真经·梯云纵优化术
RUN apt-get update && apt-get install -y --no-install-recommends \  # 轻功精要
    openssl \  # 经脉穴位图（SSL库）
    && rm -rf /var/lib/apt/lists/*  # 清除杂质

2.2 多阶段构建·分身化影

"铸剑与御剑分离，方显云踪魅影之妙。"

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# 九阳真经·分光化影诀
FROM maven:3.8.6-amazoncorretto-17 AS build  # 铸剑阶段
COPY . /usr/src/app
RUN mvn -f /usr/src/app/pom.xml clean package

FROM amazoncorretto:17-alpine  # 御剑阶段
COPY --from=build /usr/src/app/target/*.jar /app.jar
ENTRYPOINT ["java","-jar","/app.jar"]

2.3 容器网络·八步赶蝉

"容器互联如踏水无痕，需通晓Overlay网络之道。"

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docker network create --driver overlay martial-net  # 凌空虚渡
docker service create --network martial-net --name redis redis:7.0  # 驿站互联

【经脉贯通】Kubernetes御剑十二式

3.1 滚动更新·移形换影

"万剑归宗，新旧剑意无缝衔接。"

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kubectl set image deployment/sword-service sword-container=registry.martialarts.com/sword:2.0.0
kubectl rollout status deployment/sword-service  # 剑阵演化监视

3.2 HPA自动伸缩·分光化影

"剑气纵横，剑阵随敌势而变。"

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apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: sword-hpa
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: sword-service
  minReplicas: 2  # 剑阵最小分身
  maxReplicas: 10 # 剑阵最大分身
  metrics:
  - type: Resource
    resource:
      name: cpu
      target:
        type: Utilization
        averageUtilization: 60  # 剑气消耗阈值

3.3 ConfigMap剑诀同步

"万剑同源，剑意实时共享。"

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apiVersion: v1
kind: ConfigMap
metadata:
  name: sword-config
data:
  application.yml: |
    sword:
      technique: 独孤九剑
      level: 第九重
      secret: ${SWORD_SECRET}  # 剑诀密钥

【护体罡气】云原生安全七重门

4.1 镜像鉴毒·金钟罩

"江湖险恶，需辨容器之毒。"

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trivy image registry.martialarts.com/sword:1.0.0  # 鉴毒术
docker scan --file Dockerfile .  # 剑气检测

4.2 NetworkPolicy·护山大阵

"剑气结界，非我门人不得入。"

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apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: sword-policy
spec:
  podSelector:
    matchLabels:
      app: sword
  policyTypes:
  - Ingress
  ingress:
  - from:
    - podSelector:
        matchLabels:
          role: frontend  # 只允许前端接入

4.3 RBAC权限锁·擒龙功

"剑冢重地，非掌门令不可入。"

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apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: sword-keeper
rules:
- apiGroups: [""]
  resources: ["pods"]
  verbs: ["get", "list"]  # 守阁弟子权限
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: sword-keeper-binding
subjects:
- kind: ServiceAccount
  name: sword-service
roleRef:
  kind: Role
  name: sword-keeper

【闭关成果】云原生性能调优

5.1 JVM容器化调优·易筋经

"容器天地，需重定周天运转。"

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ENV JAVA_OPTS="-XX:MaxRAMPercentage=75.0 -XX:+UseContainerSupport"  # 容器感知
ENTRYPOINT exec java $JAVA_OPTS -jar /app.jar  # 经脉重塑

5.2 零信任架构·无相劫指

"无我相，无人相，无众生相。"

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apiVersion: security.istio.io/v1beta1
kind: AuthorizationPolicy
metadata:
  name: sword-zero-trust
spec:
  selector:
    matchLabels:
      app: sword
  action: DENY  # 默认拒绝
  rules:
  - from:
    - source:
        principals: ["cluster.local/ns/default/sa/sword-service"]  # 本门真气
    to:
    - operation:
        methods: ["GET", "POST"]

【下回预告】混沌初开·Service Mesh无上心法

经卷突现混沌之气："云踪魅影终是小道，欲窥天道，当修：

Istio混元真气：贯通微服务任督二脉 Envoy分光化影：百万分身如臂使指 Telemetry天眼通：洞悉三界六道因果" 《第三重·无相篇：Service Mesh大道至简》即将现世

【终章】开发者御剑飞行指南

经此修炼，当悟：

容器本质：进程即剑意，镜像乃剑鞘
编排精髓：声明式编程如剑心通明
云原生安全：零信任即最高护体罡气
性能之道：JVM需与容器天地共鸣

"昔日御剑江湖梦，今朝代码破长空。云原生非终点，乃新征途之始！" ------ 龙渊剑派第三十六代掌门 LongyuanShield 御剑于阿里云之巅