kubernetes/introduction-to-kubernetes/nginx/nginx-deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    component: nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      component: nginx
  template:
    metadata:
      labels:
        component: nginx
    spec:
      containers:
        - name: nginx
          image: nginx:1.21

          livenessProbe:
            httpGet:
              path: /
              port: 80
            initialDelaySeconds: 10
            periodSeconds: 60

          readinessProbe:
            httpGet:
              path: /
              port: 80
            initialDelaySeconds: 10
            periodSeconds: 30

          resources:
            requests:
              memory: "128Mi"
              cpu: "250m"
            limits:
              memory: "128Mi"
              cpu: "500m"
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: component
                    operator: In
                    values:
                      - "nginx"
              topologyKey: "kubernetes.io/hostname"