Microsoft.ServiceFabricApps.FabricObserver.Extensibility 3.3.3

Prefix Reserved

Requires NuGet 3.3.3 or higher.

dotnet add package Microsoft.ServiceFabricApps.FabricObserver.Extensibility --version 3.3.3

NuGet\Install-Package Microsoft.ServiceFabricApps.FabricObserver.Extensibility -Version 3.3.3

This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.

<PackageReference Include="Microsoft.ServiceFabricApps.FabricObserver.Extensibility" Version="3.3.3" />

For projects that support PackageReference, copy this XML node into the project file to reference the package.

<PackageVersion Include="Microsoft.ServiceFabricApps.FabricObserver.Extensibility" Version="3.3.3" />
                    

                            Directory.Packages.props

<PackageReference Include="Microsoft.ServiceFabricApps.FabricObserver.Extensibility" />
                    

                            Project file

For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package.

paket add Microsoft.ServiceFabricApps.FabricObserver.Extensibility --version 3.3.3

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

#r "nuget: Microsoft.ServiceFabricApps.FabricObserver.Extensibility, 3.3.3"

#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.

#:package Microsoft.ServiceFabricApps.FabricObserver.Extensibility@3.3.3

#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package.

#addin nuget:?package=Microsoft.ServiceFabricApps.FabricObserver.Extensibility&version=3.3.3
                    

                            Install as a Cake Addin

#tool nuget:?package=Microsoft.ServiceFabricApps.FabricObserver.Extensibility&version=3.3.3
                    

                            Install as a Cake Tool

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

FabricObserver Extensibility Library 3.3.3 (NET 8, SF Runtime version 10.0 and higher)

FabricObserver.Extensibility is a .NET 8 library for building custom observers that extend FabricObserver's and ClusterObserver's capabilities to match your needs. A custom observer is managed just like a built-in observer.

Note: Version 3.3.3 supports SF Runtime versions 10.0 and higher. It can not be used for lesser versions.

How to implement an observer using FO's extensibility model

Create a new .NET core library project. You should target net8.0 in your csproj because that is the target net SDK version that FabricObserver 3.3.3 is built for.
Install the latest Microsoft.ServiceFabricApps.FabricObserver.Extensibility nupkg from https://www.nuget.org/profiles/ServiceFabricApps into your plugin project.
Write an observer plugin!

Steps

Create a new class file, MyObserver.cs.

This is the required signature for your plugin's constructor:

    // FO will provide (and manage) both the FabricClient instance and StatelessServiceContext instance during startup.
    public MyObserver(FabricClient fabricClient, StatelessServiceContext context) : base(fabricClient, context)
    {
    }

Implement ObserverBase's two abstract functions:

    public override Task ObserveAsync()
    {
    }

    public override Task ReportAsync()
    {
    }

Create a [PluginTypeName]Startup.cs file

    using System.Fabric;
    using FabricObserver;
    using FabricObserver.Observers;
    using Microsoft.Extensions.DependencyInjection;

    [assembly: FabricObserverStartup(typeof(MyObserverStartup))]
    namespace FabricObserver.Observers
    {
        public class MyObserverStartup : IFabricObserverStartup
        {
            public void ConfigureServices(IServiceCollection services, FabricClient fabricClient, StatelessServiceContext context)
            {
                services.AddScoped(typeof(ObserverBase), s => new MyObserver(fabricClient, context));
            }
        }
    }

Build, put the output dll and ALL of its dependencies, both managed and native (this is very important), into the Config/Data/Plugins folder in FabricObserver/PackageRoot. You can place your plugin dll and all of its dependencies in its own folder under the Plugins directory (useful if you have multiple plugins). Again, ALL plugin dll dependencies (and their dependencies, if any) need to live in the same folder as the plugin dll. Note that if FabricObserver already employs the same version of dependency dll, then you can omit adding the dependency manually.
Add a new config section for your observer in FabricObserver/PackageRoot/Config/Settings.xml (see example at bottom of that file) Update ApplicationManifest.xml with Parameters if you want to support Versionless Application Parameter-only Upgrades for your plugin.
Ship it! (Well, test it first =)

Product	Compatible and additional computed target framework versions.
.NET	net8.0 is compatible. net8.0-android was computed. net8.0-browser was computed. net8.0-ios was computed. net8.0-maccatalyst was computed. net8.0-macos was computed. net8.0-tvos was computed. net8.0-windows was computed. net9.0 was computed. net9.0-android was computed. net9.0-browser was computed. net9.0-ios was computed. net9.0-maccatalyst was computed. net9.0-macos was computed. net9.0-tvos was computed. net9.0-windows was computed. net10.0 was computed. net10.0-android was computed. net10.0-browser was computed. net10.0-ios was computed. net10.0-maccatalyst was computed. net10.0-macos was computed. net10.0-tvos was computed. net10.0-windows was computed.

Product

.NET

Compatible target framework(s)

Included target framework(s) (in package)

Learn more about Target Frameworks and .NET Standard.

net8.0
- Microsoft.ApplicationInsights (>= 2.23.0)
- Microsoft.ApplicationInsights.NLogTarget (>= 2.23.0)
- Microsoft.Extensions.DependencyInjection (>= 9.0.8)
- Microsoft.Extensions.DependencyInjection.Abstractions (>= 9.0.8)
- Microsoft.ServiceFabric.Services (>= 7.0.1816)
- Newtonsoft.Json (>= 13.0.3)
- NLog (>= 6.0.3)
- System.Diagnostics.PerformanceCounter (>= 9.0.8)
- System.Management (>= 9.0.8)

NuGet packages (6)

Showing the top 5 NuGet packages that depend on Microsoft.ServiceFabricApps.FabricObserver.Extensibility:

Package	Downloads
Microsoft.ServiceFabricApps.ClusterObserver.Linux.SelfContained This package contains the Service Fabric ClusterObserver(CO) Application - built for .NET 8.0 and SF Runtime 10.1.x. CO is a highly configurable and extensible Service Fabric stateless service that monitors aggregated cluster health and emits SF entity-specific telemetry. It is designed to be run in Service Fabric Windows and Linux clusters. This package contains the entire application and can be used to build .NET Standard 2.0/.NET6 observer plugins. NOTE: If you want to target .NET 6 for your plugins, then you must use Microsoft.ServiceFabricApps.FabricObserver.Extensibility.3.2.9 or higher nuget package to build them.	22.2K
Microsoft.ServiceFabricApps.ClusterObserver.Windows.SelfContained This package contains the Service Fabric ClusterObserver(CO) Application - built for .NET 8.0 and SF Runtime 10.1.x. CO is a highly configurable and extensible Service Fabric stateless service that monitors aggregated cluster health and emits SF entity-specific telemetry. It is designed to be run in Service Fabric Windows and Linux clusters. This package contains the entire application and can be used to build .NET Standard 2.0/.NET6 observer plugins. NOTE: If you want to target .NET 6 for your plugins, then you must use Microsoft.ServiceFabricApps.FabricObserver.Extensibility.3.2.9 or higher nuget package to build them.	22.0K
Microsoft.ServiceFabricApps.ClusterObserver.Linux.FrameworkDependent This package contains the Service Fabric ClusterObserver(CO) Application - built for .NET 8.0 and SF Runtime 10.1.x. CO is a highly configurable and extensible Service Fabric stateless service that monitors aggregated cluster health and emits SF entity-specific telemetry. It is designed to be run in Service Fabric Windows and Linux clusters. This package contains the entire application and can be used to build .NET Standard 2.0/.NET6 observer plugins. NOTE: If you want to target .NET 6 for your plugins, then you must use Microsoft.ServiceFabricApps.FabricObserver.Extensibility.3.2.9 or higher nuget package to build them.	16.5K
Microsoft.ServiceFabricApps.ClusterObserver.Windows.FrameworkDependent This package contains the Service Fabric ClusterObserver(CO) Application - built for .NET 8.0 and SF Runtime 10.1.x. CO is a highly configurable and extensible Service Fabric stateless service that monitors aggregated cluster health and emits SF entity-specific telemetry. It is designed to be run in Service Fabric Windows and Linux clusters. This package contains the entire application and can be used to build .NET Standard 2.0/.NET6 observer plugins. NOTE: If you want to target .NET 6 for your plugins, then you must use Microsoft.ServiceFabricApps.FabricObserver.Extensibility.3.2.9 or higher nuget package to build them.	16.2K
Microsoft.ServiceFabricApps.ClusterObserver.WindowsArm64.SelfContained This package contains the Service Fabric ClusterObserver(CO) Application - built for .NET 8.0 and SF Runtime 10.1.x. CO is a highly configurable and extensible Service Fabric stateless service that monitors aggregated cluster health and emits SF entity-specific telemetry. It is designed to be run in Service Fabric Windows and Linux clusters. This package contains the entire application and can be used to build .NET Standard 2.0/.NET6 observer plugins. NOTE: If you want to target .NET 6 for your plugins, then you must use Microsoft.ServiceFabricApps.FabricObserver.Extensibility.3.2.9 or higher nuget package to build them.	157

GitHub repositories

This package is not used by any popular GitHub repositories.

Version	Downloads	Last Updated
3.3.3	92	9/5/2025
3.3.2	216	7/7/2025
3.3.1	254	3/12/2025
3.3.0	247	8/7/2024
3.2.15	346	3/20/2024
3.2.14	265	1/31/2024
3.2.13	173	1/19/2024
3.2.12	209	12/21/2023
3.2.11	280	10/12/2023
3.2.10	303	9/7/2023
3.2.9	454	8/14/2023
3.2.8	300	5/15/2023
3.2.7	441	4/27/2023
3.2.6	610	3/17/2023
3.2.5	587	3/7/2023
3.2.4	457	12/8/2022
3.2.3	590	10/19/2022
3.2.2	612	9/27/2022
3.2.1	627	8/22/2022
3.2.0	672	7/12/2022