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fix(host): h2 keepalive on site gRPC listener (arch-review 2026-08-19 P4-3)

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This commit is contained in:
Joseph Doherty
2026-08-19 14:49:37 -04:00
parent e63ffd90ee
commit b68f553f1e
3 changed files with 125 additions and 14 deletions
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src/ZB.MOM.WW.ScadaBridge.Host/Program.cs
+3 -14
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@@ -757,21 +757,10 @@ try
// metrics listener never collides with the Akka remoting port on site nodes.
var metricsPort = configuration.GetValue<int>("ScadaBridge:Node:MetricsPort", 8084);
// Configure Kestrel for HTTP/2 only on the gRPC port
// Configure Kestrel for HTTP/2 only on the gRPC port (plus the h2 keepalive that
// makes a half-open inbound stream detectable) — see SiteKestrelSetup.
builder.WebHost.ConfigureKestrel(options =>
{
options.ListenAnyIP(grpcPort, listenOptions =>
{
listenOptions.Protocols = Microsoft.AspNetCore.Server.Kestrel.Core.HttpProtocols.Http2;
});
// Dedicated HTTP/1.1 (and HTTP/2) listener for the Prometheus /metrics
// scrape endpoint, reachable by an HTTP/1.1 scraper.
options.ListenAnyIP(metricsPort, listenOptions =>
{
listenOptions.Protocols = Microsoft.AspNetCore.Server.Kestrel.Core.HttpProtocols.Http1AndHttp2;
});
});
SiteKestrelSetup.Configure(options, grpcPort, metricsPort));
// gRPC server registration. Two interceptors, two disjoint service prefixes, two
// separate keys — neither one's absence weakens the other: