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feat(opcua): OpcUaApplicationHost publishes peer URIs in Server.ServerArray

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This commit is contained in:
Joseph Doherty
2026-05-26 11:21:11 -04:00
parent 898a47746d
commit 70ffd2849d
2 changed files with 89 additions and 0 deletions
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30
src/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer/OpcUaApplicationHost.cs
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@@ -63,6 +63,15 @@ public sealed class OpcUaApplicationHostOptions
/// the Admin UI). Has no effect on <c>None</c> endpoints, which don't exchange certs.
/// </summary>
public bool AutoAcceptUntrustedClientCertificates { get; set; }
/// <summary>
/// Peer server URIs published in <c>Server.ServerArray</c> after start, in addition to
/// the local <see cref="ApplicationUri"/>. Empty by default — set this on warm-redundancy
/// deployments so OPC UA clients can discover the partner endpoint via the standard
/// Server.ServerArray property (NodeId i=2254). Order does not matter; the local URI
/// is always element 0.
/// </summary>
public IList<string> PeerApplicationUris { get; set; } = new List<string>();
}
/// <summary>
@@ -112,6 +121,7 @@ public sealed class OpcUaApplicationHost : IAsyncDisposable
await _application.Start(server).ConfigureAwait(false);
AttachUserAuthenticator();
PopulateServerArray();
_logger.LogInformation("OPC UA server started on opc.tcp://{Host}:{Port}",
_options.PublicHostname, _options.OpcUaPort);
@@ -143,6 +153,26 @@ public sealed class OpcUaApplicationHost : IAsyncDisposable
sessionManager.ImpersonateUser += _impersonateHandler;
}
/// <summary>
/// Writes the union of <see cref="OpcUaApplicationHostOptions.ApplicationUri"/> and
/// <see cref="OpcUaApplicationHostOptions.PeerApplicationUris"/> to the OPC UA standard
/// <c>Server.ServerArray</c> property (NodeId i=2254). Clients in a warm-redundancy
/// deployment discover the partner endpoint by reading this property.
/// </summary>
private void PopulateServerArray()
{
var serverObject = _server?.CurrentInstance?.ServerObject;
if (serverObject is null) return;
var uris = new List<string> { _options.ApplicationUri };
foreach (var peer in _options.PeerApplicationUris)
{
if (!string.IsNullOrWhiteSpace(peer) && !uris.Contains(peer))
uris.Add(peer);
}
serverObject.ServerArray.Value = uris.ToArray();
}
private void OnImpersonateUser(Session session, ImpersonateEventArgs args) =>
HandleImpersonation(_userAuthenticator, args, _logger);