spring:
   cloud:
     consul:
        host: localhost
        port: 8500
        discovery:
          instance-id: ${spring.application.name}:${vcap.application.instance_id:${spring.application.instance_id:${random.value}}}
         health-check-critical-timeout: 3m
         heartbeat:
            enabled: true
            ttl-value: 30

public static NewService.Check createCheck(Integer port, HeartbeatProperties ttlConfig,
									 ConsulDiscoveryProperties properties) {
	NewService.Check check = new NewService.Check();
	if (ttlConfig.isEnabled()) {
		check.setTtl(ttlConfig.getTtl());
		return check;
	}
	...
	return check;
}

curl -X "PUT" "http://localhost:8500/v1/agent/service/register" \
 -H 'Content-Type: application/json' \
 -d $'{
    "ID": "test-critical-9e7433ac909aaf67ce256818b8e14e28",
    "Address": "10.0.11.179",
    "Name": "test-critical",
    "Check": {
      "TTL": "20s",
      "DeregisterCriticalServiceAfter": "1m"
    },
    "Port": 8080
  }'