apiVersion: v1 kind: Service metadata: name: mysql-slave-external-service namespace: mysql spec: type: NodePort # NodePort 或 LoadBalancer（根据环境选择） selector: app: mysql role: slave ports: - protocol: TCP port: 3306 targetPort: 3306 nodePort: 30307 # 可选，指定 NodePort(30000 - 32767)
