kubernetes的HPA架构

。。。

Pod2

Pod1

创建新的Pod

min=2

CPU（v1）Mem(v2alpha2)自定义metrics（v2alpha2）

需kube-controller-manager配置参数：--horizontal-pod-autoscaler-use-rest-clients=true

PodNN<=9

Scale

RC/Deployment

metrics API

获取metrics

k8s-admin

kube-controller-manager

apiVersion: autoscaling/v1kind: HorizontalPodAutoscalermetadata:  name: php-apache  namespace: defaultspec:  maxReplicas: 9  minReplicas: 2  scaleTargetRef:    kind: Deployment    name: php-apache  targetCPUUtilizationPercentage: 50

Horizontal Pod Autoscaler

kube-apiserver