Question

如何为Service Fabric中托管的WCF服务公开HTTP端点而不是TCP端点？我已成功获得Microsoft在WCF-based communication stack for Reliable Services中提供的示例，但它使用了TCP端点。我已修改CreateServiceReplicaListeners()代码以尝试使用BasicHttpBinding，但收到以下错误：

Unhealthy event: SourceId='System.RA', Property='ReplicaOpenStatus', HealthState='Warning', ConsiderWarningAsError=false.
Replica had multiple failures in API call: IStatelessServiceInstance.Open(); Error = System.InvalidOperationException (-2146233079)
The ChannelDispatcher at 'http://localhost:0/43a1f131-a650-46f7-8871-02cc9821e0d1/6428f811-6944-4097-bf4a-0538355a1cb5-131275909542555280/81291d44-3c65-4d9b-8e0c-17a731103b5f' with contract(s) '"ICalculator"' is unable to open its IChannelListener.
   at System.Runtime.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at Microsoft.ServiceFabric.Services.Communication.Wcf.Runtime.WcfCommunicationListener`1.b__0(IAsyncResult ar)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.ServiceFabric.Services.Runtime.StatelessServiceInstanceAdapter.d__10.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.ServiceFabric.Services.Runtime.StatelessServiceInstanceAdapter.d__0.MoveNext()

有问题的代码：

/// <summary>
/// Optional override to create listeners (e.g., TCP, HTTP) for this service replica to handle client or user requests.
/// </summary>
/// <returns>A collection of listeners.</returns>
protected override IEnumerable<ServiceInstanceListener> CreateServiceInstanceListeners()
{
    var binding = new BasicHttpBinding(BasicHttpSecurityMode.None)
    {
        SendTimeout = TimeSpan.MaxValue,
        ReceiveTimeout = TimeSpan.MaxValue,
        OpenTimeout = TimeSpan.FromSeconds(5),
        CloseTimeout = TimeSpan.FromSeconds(5),
        MaxReceivedMessageSize = 1024 * 1024,
    };
    binding.MaxBufferSize = (int)binding.MaxReceivedMessageSize;
    binding.MaxBufferPoolSize = Environment.ProcessorCount * binding.MaxReceivedMessageSize;
    return new[]
    {
        new ServiceInstanceListener((context) =>
            new WcfCommunicationListener<ICalculator>(context, this, binding, "WcfServiceEndpoint"))
    };
}

Answer 1

为绑定提供地址：

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);
var listener = new WcfCommunicationListener<ICalculatorService>(
    serviceContext: context,
    wcfServiceObject: this,
    listenerBinding: new BasicHttpBinding(BasicHttpSecurityMode.None),
    address: new EndpointAddress(uri)
);

确保在服务清单中定义端点：

<Resources>
    <Endpoints>    
      <Endpoint Name="CalculatorEndpoint" Protocol="http" Type="Input" Port="80" />
    </Endpoints>
</Resources>

请注意，EndPoint的名称与代码中使用的名称相匹配。

确保为端口创建负载平衡规则（在我的示例中为80）

一个工作示例是here。

Azure Service Fabric中的WCF服务的HTTP端点

1 个答案: