"Kubernetes PodDisruptionBudget 与滚动升级稳定性实践"

Kubernetes PodDisruptionBudget 与滚动升级稳定性实践PDB 示例（保证至少 2 个副本可用）apiVersion: policy/v1 kind: PodDisruptionBudget metadata: name: web-pdb namespace: app spec: minAvailable: 2 selector: matchLabels: app: web Deployment 滚动升级策略apiVersion: apps/v1 kind: Deployment metadata: name: web namespace: app spec: replicas: 4 selector: matchLabels: app: web strategy: type: RollingUpdate rollingUpdate: maxUnavailable: 1 maxSurge: 1 template: metadata: labels: app: web spec: containers: - name: web image: example/web:latest 验证在节点维护或升级时观察可中断 Pod 数量与调度行为总结合理设置 PDB 与滚动参数，可在升级与维护期间保持服务稳定与受控中断。