Kubernetes PodDisruptionBudget 与滚动升级策略实践

---

title: Kubernetes PodDisruptionBudget 与滚动升级策略实践

keywords: PodDisruptionBudget, maxUnavailable, minReadySeconds, rollingUpdate, surge

description: 配置 PDB 限制自愿中断并优化 Deployment 滚动升级参数，保障服务在升级与节点维护期间的可用性。

tags:

• Kubernetes
• PodDisruptionBudget
• maxUnavailable
• minReadySeconds
• rollingUpdate
• surge
• 云原生
• 高可用

categories:

• 文章资讯
• 技术教程

---

PDB 限制自愿中断：

apiVersion: policy/v1
kind: PodDisruptionBudget
metadata:
  name: api-pdb
  namespace: default
spec:
  maxUnavailable: 1
  selector:
    matchLabels:
      app: api

Deployment 滚动升级参数：

apiVersion: apps/v1
kind: Deployment
metadata:
  name: api
spec:
  replicas: 5
  minReadySeconds: 10
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 2
      maxUnavailable: 1
  selector:
    matchLabels:
      app: api
  template:
    metadata:
      labels:
        app: api
    spec:
      containers:
        - name: api
          image: registry.example.com/app/api:v1.0.0
          ports:
            - containerPort: 3000