HealthCheckGrain.cs

using System.Threading.Tasks;
using Orleans.Concurrency;

namespace Orleans.AspNetCore.Demo.Grains
{
    public interface IHealthCheckGrain : IGrainWithGuidKey
    {
        Task<bool> IsHealthy();
    }

    [StatelessWorker(1)]
    public class HealthCheckGrain : Grain, IHealthCheckGrain
    {
        public Task<bool> IsHealthy()
        {
            return Task.FromResult(true);
        }
    }
}