samples/custom-bootstrap/example-app.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: helloworld-v1
  labels:
    app: helloworld
    version: v1
spec:
  replicas: 1
  selector:
    matchLabels:
      app: helloworld
      version: v1
  template:
    metadata:
      annotations:
        sidecar.istio.io/bootstrapOverride: "istio-custom-bootstrap-config"
      labels:
        app: helloworld
        version: v1
    spec:
      containers:
        - name: helloworld
          image: docker.io/istio/examples-helloworld-v1
          resources:
            requests:
              cpu: "100m"
          imagePullPolicy: IfNotPresent
          ports:
            - containerPort: 5000