Joseph Doherty
7b0b9c7365
Solution + 23 src projects + 26 test projects renamed; folders, csproj, namespaces, and ScadaLinkDbContext/ScadaBridgeDbContext class updated. ActorSystem "scadalink" → "scadabridge", Akka seed-node URLs migrated. SQL roles/logins, LDAP domains, CLI command name, and CLI config dir (~/.scadalink → ~/.scadabridge) also renamed. Build green; 5 Host.Tests fail awaiting SQL login rename in next commit. Pre-existing StaleTagMonitor timing flakes unchanged. Rename script committed at tools/rename-to-scadabridge.sh.
46 lines
1.9 KiB
C#
46 lines
1.9 KiB
C#
using Akka.Cluster;
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using Microsoft.Extensions.Diagnostics.HealthChecks;
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using ZB.MOM.WW.ScadaBridge.Host.Actors;
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namespace ZB.MOM.WW.ScadaBridge.Host.Health;
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/// <summary>
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/// Health check that returns healthy only if this node is the active (leader) node
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/// in the Akka.NET cluster. Used by Traefik to route traffic to the active node.
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/// </summary>
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public class ActiveNodeHealthCheck : IHealthCheck
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{
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private readonly AkkaHostedService _akkaService;
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/// <summary>Initializes a new <see cref="ActiveNodeHealthCheck"/> with the given Akka hosted service.</summary>
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/// <param name="akkaService">The Akka hosted service providing access to the actor system and cluster state.</param>
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public ActiveNodeHealthCheck(AkkaHostedService akkaService)
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{
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_akkaService = akkaService;
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}
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/// <summary>Returns healthy if this node is the cluster leader (active node); otherwise returns unhealthy.</summary>
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/// <param name="context">Health check context providing registration details.</param>
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/// <param name="cancellationToken">Cancellation token.</param>
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public Task<HealthCheckResult> CheckHealthAsync(
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HealthCheckContext context,
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CancellationToken cancellationToken = default)
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{
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var system = _akkaService.ActorSystem;
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if (system == null)
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return Task.FromResult(HealthCheckResult.Unhealthy("ActorSystem not yet available."));
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var cluster = Cluster.Get(system);
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var self = cluster.SelfMember;
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if (self.Status != MemberStatus.Up)
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return Task.FromResult(HealthCheckResult.Unhealthy($"Node not Up (status: {self.Status})."));
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var leader = cluster.State.Leader;
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if (leader != null && leader == self.Address)
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return Task.FromResult(HealthCheckResult.Healthy("Active node (cluster leader)."));
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return Task.FromResult(HealthCheckResult.Unhealthy("Standby node (not cluster leader)."));
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}
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}
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