【发布时间】:2016-07-09 12:57:56
【问题描述】:
我是 Microsoft Azure Service Fabric 的新手。对于我的硕士学位,我必须在服务结构中开发一个微服务方法原型。经过数小时的研究,我的问题仍然没有得到解决。
我想在 Web 前端(如 https://azure.microsoft.com/en-us/documentation/articles/service-fabric-add-a-web-frontend/)中访问我的(在部署的本地结构集群中)无状态服务。最简单的方法是将 ASP .NET 5 Web Api 项目添加到 Service Fabric 应用程序并在 ValuesController 中调用 ServiceProxy 方法。所以我将此代码添加到我的解决方案中:
ValuesController.cs:
[Route("api/[controller]")]
public class ValuesController : Controller
{
// GET api/values/IObject
[HttpGet("{interfaceName}")]
public async Task<string> Get(string interfaceName)
{
var serviceName = "fabric:/DataServiceFabric/MasterDataMService";
var masterDataService = ServiceProxy.Create<IMasterDataMService>(new Uri(serviceName));
var result = await masterDataService.GetMasterDataByName(interfaceName);
return result.Content;
}
}
在 F5 部署后,我的浏览器不会自动导航到我的 Web 前端。通过查看 Service Fabric Explorer,我的 ASP .NET 5 应用程序引发了健康状态错误:
Kind Health State Description
=============================================================================
Partitions Error Unhealthy partitions: 100% (1/1), MaxPercentUnhealthyPartitionsPerService=0%.
Partition Error Unhealthy partition: PartitionId='413...', AggregatedHealthState='Error'.
Event Error Error event: SourceId='System.FM', Property='State'. Partition is below target replica or instance count.
在这个this 问题之后,“分区低于目标副本或实例计数” 表示我的服务中有未处理的异常阻止它启动。但我无法在我的 Service Fabric Explorer 中找到堆栈 strace 来调试此故障。这是我的 ASP .NET Web 服务的 ServiceManifest.xml:
ServiceManifest.xml (Web1):
<?xml version="1.0" encoding="utf-8"?>
<ServiceManifest xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" Name="Web1" Version="1.0.0" xmlns="http://schemas.microsoft.com/2011/01/fabric">
<ServiceTypes>
<StatelessServiceType ServiceTypeName="Web1Type">
<Extensions>
<Extension Name="__GeneratedServiceType__">
<GeneratedNames xmlns="http://schemas.microsoft.com/2015/03/fabact-no-schema">
<DefaultService Name="Web1Service" />
<ServiceEndpoint Name="Web1TypeEndpoint" />
</GeneratedNames>
</Extension>
</Extensions>
</StatelessServiceType>
</ServiceTypes>
<CodePackage Name="C" Version="1.0.0">
<EntryPoint>
<ExeHost>
<Program>approot\runtimes\dnx-clr-win-x64.1.0.0-rc1-update1\bin\dnx.exe</Program>
<Arguments>--appbase approot\src\Web1 Microsoft.Dnx.ApplicationHost Microsoft.ServiceFabric.AspNet.Hosting --server Microsoft.AspNet.Server.WebListener</Arguments>
<WorkingFolder>CodePackage</WorkingFolder>
<ConsoleRedirection FileRetentionCount="5" FileMaxSizeInKb="2048" />
</ExeHost>
</EntryPoint>
</CodePackage>
<Resources>
<Endpoints>
<Endpoint Name="Web1TypeEndpoint" Protocol="http" Type="Input" Port="80" />
</Endpoints>
</Resources>
</ServiceManifest>
这里是我的ApplicationManifest.xml 我的服务结构解决方案:
ApplicationManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<ApplicationManifest xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ApplicationTypeName="DataServiceFabricType" ApplicationTypeVersion="1.0.0" xmlns="http://schemas.microsoft.com/2011/01/fabric">
<Parameters>
<Parameter Name="ActorTestServiceActorService_PartitionCount" DefaultValue="10" />
<Parameter Name="MasterDataMService_InstanceCount" DefaultValue="-1" />
</Parameters>
<ServiceManifestImport>
<ServiceManifestRef ServiceManifestName="Web2Pkg" ServiceManifestVersion="1.0.0" />
<ConfigOverrides />
</ServiceManifestImport>
<ServiceManifestImport>
<ServiceManifestRef ServiceManifestName="Web1" ServiceManifestVersion="1.0.0" />
</ServiceManifestImport>
<ServiceManifestImport>
<ServiceManifestRef ServiceManifestName="ActorTestServicePkg" ServiceManifestVersion="1.0.0" />
</ServiceManifestImport>
<ServiceManifestImport>
<ServiceManifestRef ServiceManifestName="MasterDataMServicePkg" ServiceManifestVersion="1.0.0" />
<ConfigOverrides />
</ServiceManifestImport>
<DefaultServices>
<Service Name="Web1Service">
<StatelessService ServiceTypeName="Web1Type">
<SingletonPartition />
</StatelessService>
</Service>
<Service Name="ActorTestServiceActorService" GeneratedIdRef="761ee3cf-5a3a-49d8-9c57-aa3480d1acf1">
<StatelessService ServiceTypeName="ActorTestServiceActorServiceType">
<UniformInt64Partition PartitionCount="[ActorTestServiceActorService_PartitionCount]" LowKey="-9223372036854775808" HighKey="9223372036854775807" />
</StatelessService>
</Service>
<Service Name="MasterDataMService">
<StatelessService ServiceTypeName="MasterDataMServiceType" InstanceCount="[MasterDataMService_InstanceCount]">
<SingletonPartition />
</StatelessService>
</Service>
</DefaultServices>
</ApplicationManifest>
因此,我使用 ASP.NET 5 Web 应用程序和相同的 ValuesController.cs 创建了一个新解决方案。我确保我的无状态服务正在我的本地集群上运行,然后我启动了我的新 Web 应用程序。在我的控制器中调用 GET 方法后,我得到了以下异常:
Exception thrown: 'System.Fabric.FabricException' in mscorlib.dll
Microsoft.AspNet.Hosting.Internal.HostingEngine: Information: Request finished in 0,2593ms 500
Microsoft.AspNet.Server.Kestrel: Error: An unhandled exception was thrown by the application.
System.Fabric.FabricException: Invalid partition key/ID '{0}' for selector {1}
我的无状态服务是一个 SingletonPartition,所以我需要一个分区键吗?如果是,我如何获得钥匙? Service Fabric Explorer 不会为我的无状态服务提供此信息。这是我的无状态服务的ServiceManifest.xml:
ServiceManifest.xml (MasterDataMService):
<?xml version="1.0" encoding="utf-8"?>
<ServiceManifest Name="MasterDataMServicePkg"
Version="1.0.0"
xmlns="http://schemas.microsoft.com/2011/01/fabric"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<ServiceTypes>
<!-- This is the name of your ServiceType.
This name must match the string used in RegisterServiceType call in Program.cs. -->
<StatelessServiceType ServiceTypeName="MasterDataMServiceType" />
</ServiceTypes>
<!-- Code package is your service executable. -->
<CodePackage Name="Code" Version="1.0.0">
<EntryPoint>
<ExeHost>
<Program>MasterDataMService.exe</Program>
</ExeHost>
</EntryPoint>
</CodePackage>
<!-- Config package is the contents of the Config directoy under PackageRoot that contains an
independently-updateable and versioned set of custom configuration settings for your service. -->
<ConfigPackage Name="Config" Version="1.0.0" />
<Resources>
<Endpoints>
<!-- This endpoint is used by the communication listener to obtain the port on which to
listen. Please note that if your service is partitioned, this port is shared with
replicas of different partitions that are placed in your code. -->
<Endpoint Name="ServiceEndpoint" Type="Input" Protocol="http" Port="80"/>
</Endpoints>
</Resources>
</ServiceManifest>
之后我决定与 OWIN 建立服务通信:
MasterDataMService.cs:
internal sealed class MasterDataMService : StatelessService, IMasterDataMService
{
[...]
protected override IEnumerable<ServiceInstanceListener> CreateServiceInstanceListeners()
{
return new[]
{
new ServiceInstanceListener(initParams => new OwinCommunicationListener("MasterDataMService", new StartUp(), initParams))
};
}
}
现在我可以在DefaultController 中使用HttpClient 访问我的微服务:
var client = new HttpClient();
var request = "http://localhost:80/MasterDataMService/api/values/query";
var result = string.Empty;
HttpResponseMessage response = await client.GetAsync(request);
if (response.IsSuccessStatusCode)
{
result = await response.Content.ReadAsStringAsync();
}
但这不是我最初想要的。我不想在我的请求中指定服务端点。相反,我想通过ServiceProxy 与我的无状态服务通信。我如何在这里实现这一目标?我做错了什么?以及如何使用部署到我的服务结构集群中的 ASP .NET 5 应用程序解决此健康状态错误?
感谢您的宝贵时间。
编辑:
无效分区键异常的扩展堆栈跟踪:
Exception thrown: 'System.Fabric.FabricException' in mscorlib.dll
Microsoft.AspNet.Hosting.Internal.HostingEngine: Information: Request finished in 1,35ms 500
Microsoft.AspNet.Server.WebListener.MessagePump: Error: ProcessRequestAsync
System.Fabric.FabricException: Invalid partition key/ID '{0}' for selector {1} ---> System.Runtime.InteropServices.COMException: exception of HRESULT: 0x80071BBF
at System.Fabric.Interop.NativeClient.IFabricServiceManagementClient4.EndResolveServicePartition(IFabricAsyncOperationContext context)
at System.Fabric.FabricClient.ServiceManagementClient.ResolveServicePartitionEndWrapper(IFabricAsyncOperationContext context)
at System.Fabric.Interop.AsyncCallOutAdapter2`1.Finish(IFabricAsyncOperationContext context, Boolean expectedCompletedSynchronously)
--- End of inner exception stack trace ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.ServiceFabric.Services.Client.ServicePartitionResolver.<ResolveAsyncHelper>d__2a.MoveNext()
--- End of stack trace from the previous location where the exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.ServiceFabric.Services.Communication.Client.CommunicationClientFactoryBase`1.<GetClientAsync>d__a.MoveNext()
如果您需要更多,请给我反馈。 (完整的堆栈跟踪是 82 行)
无效的方案异常堆栈跟踪:
Exception thrown: 'System.ArgumentException' in mscorlib.dll
Microsoft.AspNet.Hosting.Internal.HostingEngine: Information: Request finished in 1,45ms 500
Microsoft.AspNet.Server.WebListener.MessagePump: Error: ProcessRequestAsync
System.ArgumentException: the provided uri scheme 'http' is invalid; expected 'net.tcp'.
Parametername: via
at System.ServiceModel.Channels.TransportChannelFactory`1.ValidateScheme(Uri via)
at System.ServiceModel.Channels.ConnectionOrientedTransportChannelFactory`1.OnCreateChannel(EndpointAddress address, Uri via)
at System.ServiceModel.Channels.ChannelFactoryBase`1.InternalCreateChannel(EndpointAddress address, Uri via)
at System.ServiceModel.Channels.ServiceChannelFactory.ServiceChannelFactoryOverDuplexSession.CreateInnerChannelBinder(EndpointAddress to, Uri via)
at System.ServiceModel.Channels.ServiceChannelFactory.CreateServiceChannel(EndpointAddress address, Uri via)
at System.ServiceModel.Channels.ServiceChannelFactory.CreateChannel(Type channelType, EndpointAddress address, Uri via)
at System.ServiceModel.DuplexChannelFactory`1.CreateChannel(InstanceContext callbackInstance, EndpointAddress address, Uri via)
at System.ServiceModel.DuplexChannelFactory`1.CreateChannel(InstanceContext callbackInstance, Binding binding, EndpointAddress endpointAddress)
at Microsoft.ServiceFabric.Services.Communication.Wcf.Client.WcfCommunicationClientFactory`1.<CreateClientAsync>d__2.MoveNext()
--- End of stack trace from the previous location where the exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.ServiceFabric.Services.Communication.Client.CommunicationClientFactoryBase`1.<CreateClientWithRetriesAsync>d__1e.MoveNext()
【问题讨论】:
-
您可以指定任何分区键,如果您有 1 个分区则无关紧要。
-
无效分区键异常的堆栈跟踪是否有更多信息?您不需要为使用单例分区方案的服务指定分区键,例如您的无状态服务,因此错误看起来很奇怪。
-
@Mikhail 当我在我的“ActorTestServiceActorService”中指定一个
并使用 ServiceProxy与我的微服务对话时,我得到一个 System.ArgumentException: 提供的 uri 方案“http”无效;预期的“net.tcp” -
@VaclavTurecek 我将堆栈跟踪的其余部分添加到我的问题中。是啊,这真的很奇怪……这是某种配置错误吗?
标签: c# asp.net .net microservices azure-service-fabric