Rymote.Synapse.Cluster.Gossip 1.0.0

.NET 10.0

dotnet add package Rymote.Synapse.Cluster.Gossip --version 1.0.0

NuGet\Install-Package Rymote.Synapse.Cluster.Gossip -Version 1.0.0

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="Rymote.Synapse.Cluster.Gossip" Version="1.0.0" />

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

<PackageVersion Include="Rymote.Synapse.Cluster.Gossip" Version="1.0.0" />
                    

                            Directory.Packages.props

<PackageReference Include="Rymote.Synapse.Cluster.Gossip" />
                    

                            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 Rymote.Synapse.Cluster.Gossip --version 1.0.0

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

#r "nuget: Rymote.Synapse.Cluster.Gossip, 1.0.0"

#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 Rymote.Synapse.Cluster.Gossip@1.0.0

#: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=Rymote.Synapse.Cluster.Gossip&version=1.0.0
                    

                            Install as a Cake Addin

#tool nuget:?package=Rymote.Synapse.Cluster.Gossip&version=1.0.0
                    

                            Install as a Cake Tool

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

Rymote.Synapse.Cluster.Gossip

UDP gossip-lite IMembershipProvider for Rymote.Synapse.Cluster. Each node broadcasts periodic heartbeats over UDP to all known peers and tracks Alive / Suspect / Dead health transitions.

What it does

Binds a single UDP socket to GossipPort (default 7946).
Every HeartbeatIntervalSeconds (default 1 s) broadcasts a HeartbeatMessage (MessagePack-encoded) to every known peer endpoint.
Each heartbeat carries the sender's identity, endpoint, current subscription set, and its own view of the cluster — recipients learn about peers they did not already know (gossip fan-out).
Tracks last_seen[peer] timestamps and fires MembershipChange events when a peer crosses a threshold:
- Alive → Suspect after SuspectAfterSeconds (default 5 s) without a heartbeat.
- Suspect → Dead after DeadAfterSeconds (default 15 s) without a heartbeat; the peer is removed from Members.
Subscription propagation is piggybacked on heartbeats — calling PublishSubscriptionAsync / WithdrawSubscriptionAsync mutates the local set; the next heartbeat carries the updated set to all peers.
Self-identity resolves via SYNAPSE_NODE_ID env var → HOSTNAME env var → file-persisted random GUID under DataDirectory.

What it does NOT do

This is a simplified gossip implementation, not full SWIM. The following are explicitly out of scope:

Indirect probes / ping-req (no third-party reachability verification).
Incarnation numbers / refutation (a falsely-declared dead node cannot clear itself).
Suspicion subjectivity / weighted voting.
Multicast — heartbeats are N unicast UDP datagrams, one per known peer.

Quickstart

builder.UseCluster()
       .UseGossipMembership(opts =>
       {
           opts.SelfEndPoint = new IPEndPoint(IPAddress.Parse("10.0.0.1"), 7946);
           opts.Peers =
           [
               new GossipSeed(new NodeIdentity(Guid.Parse("...")), new IPEndPoint(IPAddress.Parse("10.0.0.2"), 7946)),
               new GossipSeed(new NodeIdentity(Guid.Parse("...")), new IPEndPoint(IPAddress.Parse("10.0.0.3"), 7946)),
           ];
       });

Options

Property	Default	Description
`SelfIdentity`	auto-resolved	Override self node identity.
`SelfEndPoint`	required	IP:port advertised to peers.
`GossipPort`	`7946`	UDP port to bind and send on.
`DataDirectory`	`./gossip-state`	Directory used for persisting generated node ID.
`Peers`	`[]`	Seed list of `GossipSeed` objects.
`HeartbeatIntervalSeconds`	`1`	How often to broadcast heartbeats.
`SuspectAfterSeconds`	`5`	Silence before peer becomes Suspect.
`DeadAfterSeconds`	`15`	Silence before peer is declared Dead and removed.

Product	Compatible and additional computed target framework versions.
.NET	net10.0 is compatible. 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.

Compatible target framework(s)

Included target framework(s) (in package)

Learn more about Target Frameworks and .NET Standard.

net10.0
- MessagePack (>= 2.5.187)
- Microsoft.Extensions.DependencyInjection.Abstractions (>= 10.0.0)
- Microsoft.Extensions.Logging.Abstractions (>= 10.0.0)
- Rymote.Synapse.Abstractions (>= 1.0.0)
- Rymote.Synapse.Cluster (>= 1.0.0)

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version	Downloads	Last Updated
1.0.0	88	5/18/2026