Kubernetes:如何配置/实现HPA以使用CPU进行扩展

Question

我是Kubernetes的新手。我有一个用go语言编写的应用程序，它有一个/live端点。我需要运行基于CPU配置的缩放服务。如何实现基于CPU配置的HPA(水平吊舱自动缩放(。有人能帮我吗？谢谢以下是/live端点的代码

router.Get("/live", netHttp.HandlerFunc(
func(w netHttp.ResponseWriter, r *netHttp.Request) {
http.NewHandler(pg).ServeHTTP(w, r)
},
))

以下是服务和部署代码：

apiVersion: v1
kind: Service
metadata:
name: simple-service-webapp-service
labels:
app: simple-service-webapp
spec:
ports:
- port: 8080
name: http
selector:
app: simple-service-webapp
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: simple-service-webapp-v1
labels:
version: v1
spec:
replicas: 1
selector:
matchLabels:
app: simple-service-webapp
version: v1
template:
metadata:
labels:
app: simple-service-webapp
version: v1
spec:
containers:
- name: simple-service-webapp
image: docker.io/225517/simple-service-webapp:v1
resources:
requests:
cpu: 100m
imagePullPolicy: Always
ports:
- containerPort: 8080
env:
- name: POSTGRES_URL
value: postgres://user:pass@postgresdb/simple-service?sslmode=disable
- name: POSTGRES_HOST
value: postgresdb
- name: POSTGRES_PORT
value: "5432"
- name: POSTGRES_DB
value: simple-service 
- name: POSTGRES_USER
value: user
- name: POSTGRES_PASSWORD
value: pass
- name: POSTGRES_SSLMODE
value: disable
readinessProbe:
httpGet:
path: /live
port: 8080
---

以下是我应用的hpa配置：

kubectl autoscale deployment simple-service-webapp-v1 --cpu-percent=50 --min=1 --max=5
kubectl get hpa

Answer 1

基于CPU等资源度量的HPA要求您在为部署配置HPA之前，在Kube系统命名空间上安装度量服务器

kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.3.7/components.yaml

您可以通过以下命令检查度量服务器是否正常工作，该命令应显示节点利用率。

kubectl top node