test-deploy.yml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: php-apache
spec:
  selector:
    matchLabels:
      run: php-apache
  replicas: 1
  template:
    metadata:
      labels:
        run: php-apache
    spec:
      containers:
      - name: php-apache
        image: registry.k8s.io/hpa-example
        ports:
        - containerPort: 80
        resources:
          limits:
            cpu: 500m
          requests:
            cpu: 200m

test-aspod.yml

apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: php-apache
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: php-apache
  minReplicas: 1
  maxReplicas: 10
  metrics:
  - type: Resource
    resource:
      name: cpu
      target:
        type: Utilization
        averageUtilization: 50

metrics-server 설치

metrics-values.yaml 작성
------------------------
args:
  - --kubelet-insecure-tls
  - --kubelet-preferred-address-types=InternalIP,Hostname,ExternalIP
  
Command
-------
helm repo add metrics-server <https://kubernetes-sigs.github.io/metrics-server/>
helm repo update

helm upgrade --install metrics-server metrics-server/metrics-server `
  -n kube-system --create-namespace `
  -f .\\metrics-values.yaml
=>
설치를 해줘야지 podautoscaler에서 cpu 부하를 모니터링 가능

test-svc.yml

apiVersion: v1
kind: Service
metadata:
  name: php-apache
  labels:
    run: php-apache
spec:
  ports:
  - port: 80
  selector:
    run: php-apache

test-ingress.yml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: app
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  ingressClassName: nginx
  rules:
  - host: app.local
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: php-apache
            port:
              number: 80

ingressClassName Nginx를 사용하기 위한 command
---------------------------------------------
helm repo add ingress-nginx <https://kubernetes.github.io/ingress-nginx>
helm repo update
helm install ingress-nginx ingress-nginx/ingress-nginx -n ingress-nginx --create-namespace

부하 command

kubectl run -i --tty load-generator  --rm --image=busybox:1.28 --restart=Never -- /bin/sh -c "while sleep 0.01; do wget -q -O- <http://php-apache>; done"