feat: daily node restart controlled from the admin, connect timings as a default line task [CI]

Agents and Probes exit in order at a configured time (default 04:30 UTC+8, switch and time zone in the admin settings) and the service manager starts them again; a local restart_at or MOSHIRO_RESTART_AT wins. The connect kind (TCP connect and TLS handshake timings) is now a default continuous line template, with a section on the line page.

backend/agent/src/MoShiro.Agent/AgentApp.cs

@@ -16,6 +16,7 @@ public sealed class AgentApp : IDisposable
 
     private readonly AgentConfig _config;
     private readonly bool _ipv6Supported;
+    private readonly RestartController? _restart;
     private readonly LoadedNodeIdentity _identity;
     private readonly TimeProvider _time;
     private readonly INodeLog _log;
@@ -37,8 +38,9 @@ public sealed class AgentApp : IDisposable
     private readonly FleetLink _link;
 
     /// <param name="dataDirectory">配置目录（容器里的 <c>/etc/moshiro</c>）：宿主机更新器和节点在这里交换清单、请求和状态。</param>
-    public AgentApp(AgentConfig config, LoadedNodeIdentity identity, string dataDirectory, TimeProvider time, INodeLog log)
+    public AgentApp(AgentConfig config, LoadedNodeIdentity identity, string dataDirectory, TimeProvider time, INodeLog log, RestartController? restart = null)
     {
+        _restart = restart;
         _update = new UpdateBridge(dataDirectory, new ConfigStore(dataDirectory).Write, log);
         _config = config;
         _identity = identity;
@@ -219,6 +221,19 @@ public sealed class AgentApp : IDisposable
             });
         }
 
+        if (Allow(MoShiroMethods.Schedule) && _restart is not null)
+        {
+            router.OnNotify(MoShiroMethods.Schedule, MoShiroJsonContext.Default.ScheduleParams, (_, schedule, _) =>
+            {
+                if (!_restart.SetRemote(schedule.RestartAt))
+                {
+                    _log.Warn("ignoring an invalid restart schedule from the panel");
+                }
+
+                return ValueTask.CompletedTask;
+            });
+        }
+
         if (Allow(MoShiroMethods.UpdateApply))
         {
             router.OnNotify(MoShiroMethods.UpdateApply, MoShiroJsonContext.Default.UpdateOfferParams, (_, _, _) =>

backend/agent/src/MoShiro.Agent/AgentConfig.cs

@@ -22,6 +22,10 @@ public sealed class AgentConfig
 
     [JsonPropertyName("reporting")]
     public ReportingSection Reporting { get; set; } = new();
+
+    /// <summary>每天定时重启一次，例如 <c>04:00+08:00</c>（不写偏移按 UTC）；不写就不重启。环境变量 <c>MOSHIRO_RESTART_AT</c> 优先。</summary>
+    [JsonPropertyName("restart_at")]
+    public string? RestartAt { get; set; }
 }
 
 public sealed class ReportingSection

backend/agent/src/MoShiro.Agent/Program.cs

@@ -22,9 +22,11 @@ for (int i = 0; i < args.Length - 1; i++)
 
 AgentConfig config;
 LoadedNodeIdentity identity;
+RestartController restart;
 try
 {
     config = NodeConfig.Load(configPath, AgentConfigContext.Default.AgentConfig);
+    restart = new RestartController(RestartSchedule.Resolve(config.RestartAt));
     identity = LoadedNodeIdentity.Load(config.Fleet.IdentityDir);
 }
 catch (Exception ex) when (ex is IOException or InvalidDataException or InvalidOperationException or System.Text.Json.JsonException or System.Security.Cryptography.CryptographicException)
@@ -33,10 +35,11 @@ catch (Exception ex) when (ex is IOException or InvalidDataException or InvalidO
     return 1;
 }
 
+using var restartScope = restart;
 using (identity)
 {
-    using var app = new AgentApp(config, identity, Path.GetDirectoryName(Path.GetFullPath(configPath))!, time, log);
-    await ServiceShell.RunAsync(app.RunAsync, log);
+    using var app = new AgentApp(config, identity, Path.GetDirectoryName(Path.GetFullPath(configPath))!, time, log, restart);
+    await ServiceShell.RunAsync(app.RunAsync, log, restart, time);
 }
 
 return 0;