使用 ASP.NET 在 Azure 上一起托管 WCF REST 和 NET.TCP 端点

Question

我通过 Windows Azure 上的 ASP.NET 应用程序托管我的 REST 服务。它运行完美，但几天前我需要一个角色间通信服务，我构建了我的服务，但在托管它时遇到了问题。

Global.asax 中的这段代码在我的本地 Azure 开发服务器中运行良好，但在 Azure 云中不起作用。

正确托管它们的最佳方法是什么？

Global.asax：

public class Global : HttpApplication
{
    void Application_Start(object sender, EventArgs e)
    {
        StartNotificationServiceHost();
        RegisterRoutes();
    }

    public ServiceHost ServiceHost { get; private set; }
    private void RegisterRoutes()
    {
        var hostfactory = new WebServiceHostFactory();
        RouteTable.Routes.Add(new ServiceRoute("REST/Companies",hostfactory, typeof(Companies)));
        RouteTable.Routes.Add(new ServiceRoute("REST/Public", hostfactory, typeof(Public)));
        RouteTable.Routes.Add(new ServiceRoute("REST/Users", hostfactory, typeof(Users)));
        RouteTable.Routes.Add(new ServiceRoute("REST/Contacts", hostfactory, typeof(Contacts)));
        RouteTable.Routes.Add(new ServiceRoute("REST/Projects", hostfactory, typeof(Projects)));
        RouteTable.Routes.Add(new ServiceRoute("REST/Instances", hostfactory, typeof(Instances)));
        RouteTable.Routes.Add(new ServiceRoute("REST/Activity", hostfactory, typeof(Activity)));
        RouteTable.Routes.Add(new ServiceRoute("REST/Search", hostfactory, typeof(Search)));
        RouteTable.Routes.Add(new ServiceRoute("REST/Tasks", hostfactory, typeof(Tasks)));
        RouteTable.Routes.Add(new ServiceRoute("REST/Documents", hostfactory, typeof(Documents)));
    }
    private void StartNotificationServiceHost()
    {
        Trace.WriteLine("Starting Service Host", "Information");
        NotificationServiceHost serviceHostBase = new NotificationServiceHost();
        serviceHostBase.RecycleNotificationRecieved += new RecycleNotificationRecievedEventHandler(ServiceHost_RecycleNotificationRecieved);
        serviceHostBase.CheckInstanceStatusRecieved += new CheckInstanceStatusRecievedEventHandler(serviceHostBase_CheckInstanceStatusRecieved);
        ServiceHost = new ServiceHost(serviceHostBase);
        this.ServiceHost.Faulted += (sender, e) =>
        {
            Trace.TraceError("Service Host fault occured");
            this.ServiceHost.Abort();
            Thread.Sleep(500);
            this.StartNotificationServiceHost();

        };
        NetTcpBinding binding = new NetTcpBinding(SecurityMode.None);
        RoleInstanceEndpoint notificationServiceHostEndPoint = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["NotificationServiceEndPoint"];
        this.ServiceHost.AddServiceEndpoint(
            typeof(INotifyService),
            binding,
            String.Format("net.tcp://{0}/NotifyService", notificationServiceHostEndPoint.IPEndpoint)
            );
        try
        {
            this.ServiceHost.Open();
            Trace.TraceInformation("Service Host Opened");
        }
        catch (TimeoutException timeoutException)
        {
            Trace.TraceError("Service Host open failure, Time Out: " + timeoutException.Message);
        }
        catch (CommunicationException communicationException)
        {
            Trace.TraceError("Service Host open failure, Communication Error: " + communicationException.Message);
        }
        Trace.WriteLine("Service Host Started", "Information");
    }
        InstanceItem serviceHostBase_CheckInstanceStatusRecieved(object sender, int e)
        {
...
        }
        void ServiceHost_RecycleNotificationRecieved(object sender, NotificationMessage e)
        {
...

        }
}

Web.config/ServiceModel 部分：

  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <!-- This behavior enables API Key Verification -->
          <serviceAuthorization serviceAuthorizationManagerType="OfisimCRM.Webservice.APIKeyAuthorization, OfisimCRM.Webservice" />
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior>
          <webHttp />
          <serviceValidator />
        </behavior>
      </endpointBehaviors>
    </behaviors>
    <extensions>
      <behaviorExtensions>
        <add name="serviceValidator" type="OfisimCRM.Webservice.WebHttpWithValidationBehaviorExtension, OfisimCRM.Webservice, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
      </behaviorExtensions>
    </extensions>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" aspNetCompatibilityEnabled="true" />
    <standardEndpoints>
      <webHttpEndpoint>
        <!-- 
            Configure the WCF REST service base address via the global.asax.cs file and the default endpoint 
            via the attributes on the <standardEndpoint> element below
        -->
        <standardEndpoint crossDomainScriptAccessEnabled="true" faultExceptionEnabled="true" hostNameComparisonMode="WeakWildcard" name="" defaultOutgoingResponseFormat="Json" helpEnabled="true" automaticFormatSelectionEnabled="true" maxBufferSize="65536" maxReceivedMessageSize="104857600" transferMode="Streamed" />
      </webHttpEndpoint>
    </standardEndpoints>
  </system.serviceModel>

ServiceDefinition/WebRole：

 <WebRole name="OfisimCRM.WebClient" vmsize="Small">
    <Sites>
      <Site name="Web">
        <Bindings>
          <Binding name="Endpoint1" endpointName="Endpoint1" />
        </Bindings>
      </Site>
    </Sites>
    <Endpoints>
      <InputEndpoint name="Endpoint1" protocol="http" port="80" />
      <InternalEndpoint name="NotificationServiceEndPoint" protocol="tcp" />
    </Endpoints>
    <Imports>
      <Import moduleName="Diagnostics" />
      <Import moduleName="RemoteAccess" />
    </Imports>
    <ConfigurationSettings>
    </ConfigurationSettings>
  </WebRole>

错误：

The server encountered an error processing the request. The exception message is 'Could not connect to net.tcp://x.x.x.29:8000/NotifyService. The connection attempt lasted for a time span of 00:00:21.0918600. TCP error code 10060: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond x.x.x.29:8000. '. See server logs for more details.

Answer 1

角色实例访问已受到防火墙限制。通常，实例仅接受来自负载均衡器的连接。如下所示，将设置添加到服务定义文件（*.csdef）中，并且需要接受连接。

<?xml version="1.0" encoding="utf-8" ?>
  <ServiceDefinition name="RoleCommunication" xmlns="http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceDefinition"> 
: 
  <NetworkTrafficRules> 
    <OnlyAllowTrafficTo> 
      <Destinations> 
        <RoleEndpoint endpointName="YourEndPointName" roleName="YourRole" /> 
      <Destinations> 
      <WhenSource matches="AnyRole"> 
        <FromRole roleName="YourRole" /> 
      </WhenSource> 
    </OnlyAllowTrafficTo> 
  </NetworkTrafficRules> 
</ServiceDefinition >

或者，您可以在启动任务中使用 netsh 命令明确添加连接规则。

前任）
netsh advfirewall 防火墙添加规则名称 =“YourEndPoint”dir = in action =allow localport = 80 协议 = tcp

====

“InternalEndpoint”是动态端口吗？如果可能的话，您能否在.csdef和启动任务中设置固定端口。

ex)

<InternalEndpoint name="NotificationServiceEndPoint" protocol="tcp" port="8000"/>

和

netsh advfirewall firewall add rule name="NotificationServiceEndPoint" dir=in action=allow localport=8000 protocol=tcp

====

或者，环境变量可用如下：

   <Endpoints>
      <InputEndpoint name="Endpoint1" protocol="http" port="80" />
      <InternalEndpoint name="NotificationServiceEndPoint" protocol="tcp" />
    </Endpoints>

      <Startup>
          <Task commandLine="configfirewall.cmd" executionContext="elevated" taskType="simple">
              <Environment>
                  <Variable name="NotificationServiceEndPointPort" value="/RoleEnvironment/CurrentInstance/Endpoints/Endpoint[@name='NotificationServiceEndPoint']/@port" />
              </Environment>
          </Task>
      </Startup>

并且您在启动任务中使用环境变量

netsh advfirewall firewall add rule name="ServiceEndPoint" dir=in action=allow localport=%NotificationServiceEndPointPort% protocol=tcp