bootstrap: "{\"xds_servers\": [{\"server_uri\":\"xds.example.com:443\", \"channel_creds\":[{\"type\": \"fake\"}]}]}"
actions {
  start_watch {
    resource_type {
      cluster {
      }
    }
  }
}
actions {
  send_message_to_client {
    stream_id {
      ads {
      }
    }
    response {
      version_info: "envoy.config.cluster.v3.Cluster"
      resources {
        type_url: "envoy.service.discovery.v3.Resource"
      }
      canary: true
      type_url: "envoy.config.cluster.v3.Cluster"
      nonce: "envoy.config.cluster.v3.Cluster"
    }
  }
}
