fix(host): unify active-node on oldest-member semantics — purge/self-report/labels now track the singleton host

2026-07-08 15:48:07 -04:00
parent 6320be9954
commit da6d5ae12c
5 changed files with 70 additions and 21 deletions
@@ -1,5 +1,11 @@
 using Akka.Actor;
 using Akka.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging.Abstractions;
+using Microsoft.Extensions.Options;
+using ZB.MOM.WW.ScadaBridge.ClusterInfrastructure;
+using ZB.MOM.WW.ScadaBridge.Communication;
+using ZB.MOM.WW.ScadaBridge.Host.Actors;
 using ZB.MOM.WW.ScadaBridge.Host.Health;

 namespace ZB.MOM.WW.ScadaBridge.Host.Tests;
@@ -46,6 +52,50 @@ akka {{
        Assert.False(ClusterActivityEvaluator.SelfIsOldest(cluster, "site-nonexistent"));
    }

+    [Fact]
+    public async Task ActiveNodeGate_And_NodeProvider_AgreeWithEvaluator()
+    {
+        // Both product gates must be backed by the oldest-member evaluator.
+        // A single-node Up cluster: evaluator says true, so both must say true.
+        // (Pinning test — the leader==oldest divergence is proven in Task 8's
+        // two-node integration test; here we assert the wiring holds.)
+        var port = FreePort();
+        var self = $"akka.tcp://scadabridge@127.0.0.1:{port}";
+        var akkaService = new AkkaHostedService(
+            new ServiceCollection().BuildServiceProvider(),
+            Options.Create(new NodeOptions { Role = "Central", NodeHostname = "127.0.0.1", RemotingPort = port }),
+            Options.Create(new ClusterOptions
+            {
+                SeedNodes = new List<string> { self },
+                SplitBrainResolverStrategy = "keep-oldest",
+                StableAfter = TimeSpan.FromSeconds(3),
+                HeartbeatInterval = TimeSpan.FromMilliseconds(500),
+                FailureDetectionThreshold = TimeSpan.FromSeconds(2),
+                MinNrOfMembers = 1,
+                DownIfAlone = true,
+            }),
+            Options.Create(new CommunicationOptions()),
+            NullLogger<AkkaHostedService>.Instance);
+
+        var system = akkaService.GetOrCreateActorSystem();
+        try
+        {
+            var cluster = Akka.Cluster.Cluster.Get(system);
+            var deadline = DateTime.UtcNow.AddSeconds(20);
+            while (cluster.SelfMember.Status != Akka.Cluster.MemberStatus.Up && DateTime.UtcNow < deadline)
+                await Task.Delay(100);
+
+            var gate = new ActiveNodeGate(akkaService);
+            var provider = new AkkaClusterNodeProvider(akkaService, "Central");
+            Assert.True(gate.IsActiveNode);
+            Assert.True(provider.SelfIsPrimary);
+        }
+        finally
+        {
+            await system.Terminate();
+        }
+    }
+
    private static int FreePort()
    {
        var l = new System.Net.Sockets.TcpListener(System.Net.IPAddress.Loopback, 0);