리소스 제어와 HPA

부하 발생용 애플리케이션 작성

1. PHP 애플리 케이션 작성

• index.php

  <?php
    $x = 0.0001;
    for ($i = 0; $i <= 1000000; $i++) {
      $x += sqrt($x);
    }
    echo "OK!";
  ?>
  

• 도커 이미지 빌드

  Dockerfile
  ----------
  FROM php:5-apache
  ADD index.php /var/www/html/index.php
  RUN chmod a+rx index.php
  
  command
  -------
  docker build -t ddoocckker123/php-apache
  docker login
  docker push ddooccker123/php-apache
  

2. 포드 및 서비스 만들기

• Deployment로 Pod 생성

  php-apache-deploy.yml
  ---------------------
  apiVersion: apps/v1
  kind: Deployment
  metadata:
    name: php-apache-dp
  spec:
    selector:
      matchLabels:
        app: php-apache
    replicas: 1
    template:
      metadata:
        labels:
          app: php-apache
      spec:
        containers:
        - name: php-apache
          image: dangtong/php-apache
          ports:
          - containerPort: 80
          resources:
            limits:
              cpu: 500m
            requests:
              cpu: 200m
  

• LB 서비스 생성

  php-apache-svc.yml
  ------------------
  apiVersion: v1
  kind: Service
  metadata:
    name: php-apache-lb
  spec:
    type: LoadBalancer
    ports:
    - port: 80
      targetPort: 80
    selector:
      app: php-apache
      
  command
  -------
  kubectl apply -f ./php-apache-deploy.yml
  kubectl apply -f ./php-apache-svc.yml