apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
        - name: nginx
          image: nginx
          readinessProbe:
            exec:
              command:
                - cat
                - /tmp/healthy
            initialDelaySeconds: 5
            periodSeconds: 5