Question

我正在尝试使用WCF通信侦听器将运行WCF的Azure Web角色迁移到Azure Service Fabric中的无状态服务。一切都在我的本地服务群集中运行。发布到Azure后，群集中的其他服务可以访问无状态WCF服务，但外部（Internet）客户端（包括我的开发机器）无法连接瞬态网络错误。

我验证了资源组中的负载均衡器具有端口80和8080的规则/探测器，并且已使用TCP和HTTP进行了测试。我还尝试在WCF客户端上设置分区解析器，以指向服务集群上的“客户端连接端点”（默认情况下，它在服务集群中工作）。

此时，我不确定是否存在配置问题，或者外部（Internet）客户端是否可以连接到运行WCF通信侦听器的无状态服务。

这是我的配置：

WCF通讯监听器

    private Func<StatelessServiceContext, ICommunicationListener> CreateListener()
    {
        return delegate (StatelessServiceContext context)
        {

            var host = new WcfCommunicationListener<IHello>(
                wcfServiceObject: this,
                serviceContext: context,
                endpointResourceName: "ServiceEndpoint",
                listenerBinding: CreateDefaultHttpBinding()
            );
            return host;
        };
    }

WCF绑定

    public static Binding CreateDefaultHttpBinding()
    {
        var binding = new WSHttpBinding(SecurityMode.None)
        {
            CloseTimeout = new TimeSpan(00, 05, 00),
            OpenTimeout = new TimeSpan(00, 05, 00),
            ReceiveTimeout = new TimeSpan(00, 05, 00),
            SendTimeout = new TimeSpan(00, 05, 00),
            MaxReceivedMessageSize = int.MaxValue,
        };
        var quota = new XmlDictionaryReaderQuotas
        {
            MaxArrayLength = int.MaxValue,
            MaxDepth = int.MaxValue
        };
        binding.ReaderQuotas = quota;
        return binding;
    }

ServiceManifest.xml （我还使用了各种端口的默认TCP绑定）

<Endpoints>
  <Endpoint Name="ServiceEndpoint" Protocol="http" Port="8080" />
</Endpoints>

WCF控制台应用

var address = new Uri("fabric:/ServiceFabricWcf.Azure/ServiceFabricWcf");
var client = GetClient(address, CreateDefaultHttpBinding());

try
  {
     var results = client.InvokeWithRetry(x => x.Channel.Hello());
     System.WriteLine($"Results from WCF Service: '{results}'");
     Console.ReadKey();
  }
  catch (Exception e)
  {
     System.Console.WriteLine("Exception calling WCF Service: '{e}'");
  }

WCF客户端

    public static WcfServiceFabricCommunicationClient<IHello> GetClient(Uri address, Binding binding)
    {
        //ServicePartitionResolver.GetDefault(); Works with other services in cluster
        var partitionResolver = new ServicePartitionResolver("<clientConnectionEndpointOfServiceCluster>:8080");
        var wcfClientFactory = new WcfCommunicationClientFactory<IHello>(binding, null, partitionResolver);
        var sfclient = new WcfServiceFabricCommunicationClient<IHello>(wcfClientFactory, address, ServicePartitionKey.Singleton);
        return sfclient;
    }

WCF客户端工厂

    public class WcfServiceFabricCommunicationClient<T> : ServicePartitionClient<WcfCommunicationClient<T>> where T : class
{
    public WcfServiceFabricCommunicationClient(ICommunicationClientFactory<WcfCommunicationClient<T>> communicationClientFactory,
                                               Uri serviceUri,
                                               ServicePartitionKey partitionKey = null,
                                               TargetReplicaSelector targetReplicaSelector = TargetReplicaSelector.Default,
                                               string listenerName = null,
                                               OperationRetrySettings retrySettings = null
                                               )
        : base(communicationClientFactory, serviceUri, partitionKey, targetReplicaSelector, listenerName, retrySettings)
    {

    }
}

Answer 1

以下是一种适用于WebHttpBinding的{{3}} WCF服务的方法：https://github.com/loekd/ServiceFabric.WcfCalc

尝试更改代码，使其不使用endpointResourceName，而是使用包含显式网址的address。 URL应该是群集的公共名称，例如 mycluster.region.cloudapp.azure.com 。

编辑：网址应该使用节点名称，这更容易。

string host = context.NodeContext.IPAddressOrFQDN;
  var endpointConfig = context.CodePackageActivationContext.GetEndpoint    
    ("CalculatorEndpoint");
  int port = endpointConfig.Port;
  string scheme = endpointConfig.Protocol.ToString();
  string uri = string.Format(CultureInfo.InvariantCulture, 
    "{0}://{1}:{2}/", scheme, host, port);

Answer 2

这是我的更新代码，基于LoekD的答案。

服务更改： 要使该服务可供互联网客户端使用，您必须添加一个＆＃34;地址＆＃34; WCFCommunicationListener的属性，告诉服务要监听的端点（http://mycluster.region.azure.com或http://localhost）

客户端更改：使用普通的WCF客户端，不带任何WCFCommunicationListener引用。仅在服务结构内部使用WCFCommunicationListener客户端（我的原始代码在此方案中正常工作）。

WCF服务器侦听器

return delegate (StatelessServiceContext context)
        {
            string host = HostFromConfig(context);
            if (string.IsNullOrWhiteSpace(host))
            {
                host = context.NodeContext.IPAddressOrFQDN;
            }

            var endpointConfig = context.CodePackageActivationContext.GetEndpoint("ServiceEndpoint");
            int port = endpointConfig.Port;
            string scheme = endpointConfig.Protocol.ToString();
            //http://mycluster.region.cloudapp.azure.com or http://localhost
            string uri = string.Format(CultureInfo.InvariantCulture, "{0}://{1}:{2}", scheme, host, port);

            var listener = new WcfCommunicationListener<IHello>(
                wcfServiceObject: this,
                serviceContext: context,
                listenerBinding: CreateDefaultHttpBinding(),
                address: new EndpointAddress(uri)
            );
            return listener;
        };

WCF客户端应用

static void Main(string[] args)
    {
        System.Console.WriteLine("\nPress any key to start the wcf client.");
        System.Console.ReadKey();

        System.Console.WriteLine("*************Calling Hello Service*************");
        try
        {
            var binding = CreateDefaultHttpBinding();
            var address = new EndpointAddress("http://cluster.region.cloudapp.azure.com/"); //new EndpointAddress("http://localhost");
            var results = WcfWebClient<IHello>.InvokeRestMethod(x => x.Hello(),binding, address ); 

            System.Console.WriteLine($"*************Results from Hello Service: '{results}'*************");
            Console.ReadKey();
        }
        catch (Exception e)
        {
            System.Console.WriteLine($"*************Exception calling Hello Service: '{e}'*************");
        }
    }

WCF绑定

public static Binding CreateDefaultHttpBinding()
{
    var binding = new WSHttpBinding(SecurityMode.None)
    {
        CloseTimeout = new TimeSpan(00, 05, 00),
        OpenTimeout = new TimeSpan(00, 05, 00),
        ReceiveTimeout = new TimeSpan(00, 05, 00),
        SendTimeout = new TimeSpan(00, 05, 00),
        MaxReceivedMessageSize = int.MaxValue,
    };
    var quota = new XmlDictionaryReaderQuotas
    {
        MaxArrayLength = int.MaxValue,
        MaxDepth = int.MaxValue
    };
    binding.ReaderQuotas = quota;
    return binding;
}

外部/互联网WCF客户端示例：

public abstract class WcfWebClient<T> where T : class
{
    public static TResult InvokeRestMethod<TResult>(Func<T, TResult> method, Binding binding, EndpointAddress address)
    {
        var myChannelFactory = new ChannelFactory<T>(binding, address);
        var wcfClient = myChannelFactory.CreateChannel();

        try
        {
            var result = method(wcfClient);
            ((IClientChannel)wcfClient).Close();
            return result;
        }
        catch (TimeoutException e)
        {
            Trace.TraceError("WCF Client Timeout Exception" + e.Message);
            // Handle the timeout exception.
            ((IClientChannel)wcfClient).Abort();
            throw;
        }
        catch (CommunicationException e)
        {
            Trace.TraceError("WCF Client Communication Exception" + e.Message);
            // Handle the communication exception.
            ((IClientChannel)wcfClient).Abort();
            throw;
        }
    }
}

Answer 3

您还可以尝试通过在服务实现上添加以下属性来为WCF服务启用任何地址绑定模式：

[ServiceBehavior（AddressFilterMode = AddressFilterMode.Any）]

外部客户端无法访问Azure Service Fabric上的WCF通信侦听器

3 个答案: