1
resources:
2
  requests:          # 调度依据（分配保证）
3
    cpu: 500m
4
    memory: 1Gi
5
  limits:            # 运行上限（超限被限流/OOM）
6
    cpu: 1
7
    memory: 2Gi

1
affinity:
2
  nodeAffinity:            # 节点亲和：大内存任务 → 内存型节点
3
    requiredDuringScheduling:
4
      nodeSelectorTerms:
5
      - matchExpressions:
6
        - key: node-type
7
          operator: In
8
          values: ["memory"]
9
  podAntiAffinity:         # 反亲和：有状态组件副本分散到不同节点
10
    preferredDuringScheduling:
11
      - weight: 100
12
        podAffinityTerm:
13
          topologyKey: kubernetes.io/hostname
14
          labelSelector:
15
            matchLabels: {app: kafka}
16
tolerations:               # 容忍：允许调度到带污点的专用节点
17
  - key: "bigdata"
18
    operator: Exists

1
# HPA：按 CPU 自动扩缩（需 metrics-server）
2
apiVersion: autoscaling/v2
3
kind: HorizontalPodAutoscaler
4
metadata: {name: web-hpa}
5
spec:
6
  scaleTargetRef: {apiVersion: apps/v1, kind: Deployment, name: web}
7
  minReplicas: 2
8
  maxReplicas: 10
9
  metrics:
10
  - type: Resource
11
    resource: {name: cpu, target: {type: Utilization, averageUtilization: 60}}

1
apiVersion: apps/v1
2
kind: StatefulSet
3
metadata: {name: zookeeper}
4
spec:
5
  serviceName: zk-headless      # 无头 Service：稳定网络标识
6
  replicas: 3
7
  selector: {matchLabels: {app: zookeeper}}
8
  template:
9
    metadata: {labels: {app: zookeeper}}
10
    spec:
11
      terminationGracePeriodSeconds: 60   # 优雅下线窗口
12
      containers:
13
      - name: zk
14
        image: zookeeper:3.8
15
        resources:
16
          requests: {cpu: "1", memory: 2Gi}
17
          limits: {cpu: "2", memory: 4Gi}
18
  volumeClaimTemplates:          # 每副本独立 PVC
19
  - metadata: {name: data}
20
    spec:
21
      accessModes: ["ReadWriteOnce"]
22
      resources: {requests: {storage: 50Gi}}