# A trivially small HTTP service the app's "downstream" health indicator calls. Scale it to zero to
# simulate a dependency outage: kubectl -n demo scale deploy/downstream --replicas=0
apiVersion: apps/v1
kind: Deployment
metadata:
  name: downstream
  namespace: demo
spec:
  replicas: 1
  selector:
    matchLabels: {app: downstream}
  template:
    metadata:
      labels: {app: downstream}
    spec:
      # busybox httpd runs as PID 1 and ignores SIGTERM, so without this a scale-to-zero leaves the
      # "outage" serving for the full 30 s grace period.
      terminationGracePeriodSeconds: 2
      containers:
        - name: httpd
          image: busybox:1.37
          imagePullPolicy: Never
          command: ["sh", "-c", "mkdir -p /www && echo ok > /www/index.html && exec httpd -f -p 8080 -h /www"]
          ports: [{containerPort: 8080}]
---
apiVersion: v1
kind: Service
metadata:
  name: downstream
  namespace: demo
spec:
  selector: {app: downstream}
  ports: [{port: 8080, targetPort: 8080}]