feat(cluster): InitJoin self-form fallback armed via Akka.Hosting startup task

Claude-Session: https://claude.ai/code/session_01GASWkNEi68FSCtvr6rLoEW
2026-07-22 06:06:31 -04:00
parent 979dc102dd
commit 9ded86342e
2 changed files with 123 additions and 0 deletions
@@ -92,6 +92,23 @@ public static class ServiceCollectionExtensions
        // ActorSystem for exactly that reason: the effective value is the only one worth asserting.
        builder.AddHocon(BuildDowningHocon(options), HoconAddMode.Prepend);

+        // InitJoin self-form fallback (decision 2026-07-22): registered as an Akka.Hosting startup
+        // task so every host built through this bootstrap — production AND the test hosts in
+        // Cluster.Tests — arms it identically. Guarded inside Arm: disabled when SelfFormAfter is
+        // unset; inert when this node is not in its own seed list (site nodes seeded only by
+        // central-1 must wait, not island).
+        // ILoggerFactory is fully qualified: `using Microsoft.Extensions.Logging` would make the
+        // LogLevel in ConfigureLoggers above ambiguous with Akka.Event.LogLevel.
+        var fallbackLogger =
+            (serviceProvider.GetService<Microsoft.Extensions.Logging.ILoggerFactory>()
+             ?? Microsoft.Extensions.Logging.Abstractions.NullLoggerFactory.Instance)
+            .CreateLogger("ZB.MOM.WW.OtOpcUa.Cluster.ClusterBootstrapFallback");
+        builder.AddStartup((system, _) =>
+        {
+            ClusterBootstrapFallback.Arm(system, options, fallbackLogger);
+            return Task.CompletedTask;
+        });
+
        return builder;
    }