Question

我有一个带有Web角色和辅助角色的Windows Azure云服务。我建立了一个网站，允许我对云服务执行各种管理功能（停止/启动，重启实例，添加实例，删除实例）。所有功能都通过web api执行。我的问题是，当我添加Web角色的实例时，worker角色会重新启动。请注意，如果我通过Azure门户添加实例，则不会发生这种情况。代码在所有其他方面正确运行。任何想法如何做到这一点，只有受影响的角色回收而不是所有角色回收？

我的代码：

    public void AddInstance()
    {
        XDocument configDoc = this.GetDeploymentConfiguration();
        var ns = configDoc.Root.GetDefaultNamespace();

        configDoc.Root
            .Elements( ns + "Role" )
            .FirstOrDefault( r => r.Attribute( "name" ).Value.ToLower() == this.RoleName.ToLower() )
            .Element( ns + "Instances" )
            .Attribute( "count" )
            .Value = ( int.Parse( configDoc.Root
                           .Elements( ns + "Role" )
                           .FirstOrDefault( r => r.Attribute( "name" ).Value.ToLower() == this.RoleName.ToLower() )
                           .Element( ns + "Instances" )
                           .Attribute( "count" )
                           .Value ) + 1 ).ToString();

        string encodedString = Convert.ToBase64String( Encoding.UTF8.GetBytes( configDoc.ToString() ) );
        this.SetDeploymentConfig( encodedString );
    }

    public XDocument GetDeploymentConfiguration()
    {
        string uri = string.Format( this.servicePropertiesOperationFormat, this.subscriptionID, this.serviceName, "production", "" );
        ServiceManagementOperation operation = new ServiceManagementOperation( this.thumbprint, this.versionID );

        var xdoc= operation.Invoke( uri );
        var myelm = xdoc.Element( wa + "Deployment" ).Element( wa + "Configuration" );

        var mystring=  Encoding.UTF8.GetString( Convert.FromBase64String( myelm.Value ) );

        return XDocument.Parse( mystring );
    }

    public string SetDeploymentConfig( string configurationFile )
    {
        string uri = string.Format( this.servicePropertiesOperationFormat, this.subscriptionID, this.serviceName, "production", "/?comp=config" );
        ServiceManagementOperation operation = new ServiceManagementOperation( this.thumbprint, this.versionID );
        string payloadString = string.Format(
            @"<?xml version=""1.0"" encoding=""utf-8""?>
            <ChangeConfiguration xmlns=""http://schemas.microsoft.com/windowsazure"">
                    <Configuration>{0}</Configuration>
            </ChangeConfiguration>", configurationFile );

        XDocument payload = XDocument.Parse( payloadString );
        return operation.Invoke( uri, payload );
    }

Answer 1

它不是很直观，但你必须取消缩放事件，否则这将告诉Azure重启其他实例。将以下行添加到RoleEntryPoint文件中的OnStart方法：

RoleEnvironment.Changing += (sender, args) => { args.Cancel = false; };

添加Web角色实例时，Azure Worker Role会重新启动

1 个答案: