feat(mesh-phase5): Telemetry/TelemetryDial options + fail-closed validators
Claude-Session: https://claude.ai/code/session_01GASWkNEi68FSCtvr6rLoEW
This commit is contained in:
Joseph Doherty
@@ -48,6 +48,14 @@ public static class ServiceCollectionExtensions
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configuration, ConfigSourceOptions.SectionName);
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services.Configure<ConfigServeOptions>(configuration.GetSection(ConfigServeOptions.SectionName));
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// Per-cluster mesh Phase 5: which transport carries a node's live-telemetry stream (node
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// serve side + central dial side). Validated at startup for the same reason ConfigSource is —
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// a Grpc-mode node with no listen port or no key produces silence, not an error.
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services.AddValidatedOptions<TelemetryOptions, TelemetryOptionsValidator>(
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configuration, TelemetryOptions.SectionName);
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services.AddValidatedOptions<TelemetryDialOptions, TelemetryDialOptionsValidator>(
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configuration, TelemetryDialOptions.SectionName);
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services.AddSingleton<IClusterRoleInfo, ClusterRoleInfo>();
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return services;
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@@ -0,0 +1,191 @@
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Options;
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namespace ZB.MOM.WW.OtOpcUa.Cluster;
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/// <summary>
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/// Node-side selection of the transport a node's live-telemetry stream is carried over
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/// (per-cluster mesh Phase 5). The dark switch that lets a node stop publishing telemetry over
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/// the mesh-wide DistributedPubSub topic and instead serve it over a dedicated gRPC stream that
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/// does not require sharing a gossip ring with whoever is watching.
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/// </summary>
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public sealed class TelemetryOptions
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{
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/// <summary>Configuration section name.</summary>
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public const string SectionName = "Telemetry";
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/// <summary>Publish telemetry over the mesh-wide DistributedPubSub topic — the default.</summary>
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public const string ModeDps = "Dps";
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/// <summary>Serve telemetry over a dedicated gRPC stream.</summary>
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public const string ModeGrpc = "Grpc";
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/// <summary>
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/// <see cref="ModeDps"/> (default) or <see cref="ModeGrpc"/>. Any other value fails host
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/// start.
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/// </summary>
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public string Mode { get; set; } = ModeDps;
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/// <summary>
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/// Dedicated gRPC listen port for the telemetry stream. <c>0</c> (the default) disables it —
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/// nothing is bound. Required on a driver-role node under <see cref="ModeGrpc"/>.
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/// </summary>
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public int GrpcListenPort { get; set; }
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/// <summary>
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/// Shared bearer key the serve-side interceptor checks. Supply via the environment
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/// (<c>Telemetry__ApiKey</c>) — never commit it. Required under <see cref="ModeGrpc"/> on any
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/// roled node — fail-closed against hosting an un-keyed telemetry surface.
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/// </summary>
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public string ApiKey { get; set; } = string.Empty;
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}
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/// <summary>
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/// Central-side selection of how central dials a node for live telemetry (per-cluster mesh
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/// Phase 5). Mirrors <see cref="TelemetryOptions"/>'s mode but carries the dial-side knobs
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/// (contact refresh cadence, per-call timeout) instead of a listen port.
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/// </summary>
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public sealed class TelemetryDialOptions
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{
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/// <summary>Configuration section name.</summary>
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public const string SectionName = "TelemetryDial";
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/// <summary>Read telemetry from the mesh-wide DistributedPubSub topic — the default.</summary>
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public const string ModeDps = "Dps";
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/// <summary>Dial nodes' dedicated gRPC telemetry streams.</summary>
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public const string ModeGrpc = "Grpc";
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/// <summary>
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/// <see cref="ModeDps"/> (default) or <see cref="ModeGrpc"/>. Any other value fails host
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/// start.
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/// </summary>
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public string Mode { get; set; } = ModeDps;
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/// <summary>
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/// Shared bearer key; must equal a dialled node's <see cref="TelemetryOptions.ApiKey"/>.
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/// Supply via the environment (<c>TelemetryDial__ApiKey</c>) — never commit it. Required
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/// under <see cref="ModeGrpc"/>.
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/// </summary>
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public string ApiKey { get; set; } = string.Empty;
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/// <summary>How often central refreshes its set of dialable node contacts, in seconds.</summary>
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public int ContactRefreshSeconds { get; set; } = 60;
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/// <summary>Per-call deadline for a gRPC telemetry dial, in seconds.</summary>
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public int CallTimeoutSeconds { get; set; } = 30;
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}
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/// <summary>
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/// Fails the host at startup on a <see cref="TelemetryOptions"/> shape that would leave a node
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/// unable to serve its live-telemetry stream.
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/// </summary>
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/// <remarks>
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/// Like <see cref="ConfigSourceOptionsValidator"/>, every fault caught here otherwise surfaces as
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/// an <i>absence</i> — a telemetry consumer that simply never sees data from this node, with no
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/// stack trace and no failing node to point at; refusing to start is cheaper to diagnose.
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/// </remarks>
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public sealed class TelemetryOptionsValidator : IValidateOptions<TelemetryOptions>
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{
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private readonly IConfiguration _configuration;
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/// <summary>
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/// DI-constructed by <c>AddValidatedOptions</c> (a plain <c>AddSingleton</c>), so a
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/// constructor dependency is safe here. <see cref="IConfiguration"/> — not
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/// <c>IClusterRoleInfo</c> — is the source of this node's roles: <c>IClusterRoleInfo</c>'s
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/// implementation needs the <c>ActorSystem</c>, which does not exist yet at
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/// <c>ValidateOnStart</c> time.
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/// </summary>
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public TelemetryOptionsValidator(IConfiguration configuration)
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{
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_configuration = configuration;
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}
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/// <inheritdoc />
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public ValidateOptionsResult Validate(string? name, TelemetryOptions options)
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{
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ArgumentNullException.ThrowIfNull(options);
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var errors = new List<string>();
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var isDps = string.Equals(options.Mode, TelemetryOptions.ModeDps, StringComparison.OrdinalIgnoreCase);
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var isGrpc = string.Equals(options.Mode, TelemetryOptions.ModeGrpc, StringComparison.OrdinalIgnoreCase);
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if (!isDps && !isGrpc)
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{
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errors.Add(
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$"{TelemetryOptions.SectionName}:{nameof(TelemetryOptions.Mode)} is '{options.Mode}'. "
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+ $"Expected '{TelemetryOptions.ModeDps}' or '{TelemetryOptions.ModeGrpc}'.");
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}
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var roles = _configuration.GetSection("Cluster:Roles").Get<string[]>() ?? Array.Empty<string>();
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var isDriver = Array.IndexOf(roles, "driver") >= 0;
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if (isGrpc)
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{
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if (isDriver && options.GrpcListenPort <= 0)
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{
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errors.Add(
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$"Cluster:Roles has 'driver' and {TelemetryOptions.SectionName}:"
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+ $"{nameof(TelemetryOptions.Mode)} is '{TelemetryOptions.ModeGrpc}', but "
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+ $"{TelemetryOptions.SectionName}:{nameof(TelemetryOptions.GrpcListenPort)} is "
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+ $"{options.GrpcListenPort}. A driver node in Grpc telemetry mode must set "
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+ $"{TelemetryOptions.SectionName}:{nameof(TelemetryOptions.GrpcListenPort)}.");
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}
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if (roles.Length > 0 && string.IsNullOrEmpty(options.ApiKey))
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{
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errors.Add(
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$"{TelemetryOptions.SectionName}:{nameof(TelemetryOptions.ApiKey)} is empty. Under "
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+ $"{TelemetryOptions.ModeGrpc} the shared bearer key is the whole authentication "
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+ "boundary to this node's telemetry surface; without it every dial is rejected. "
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+ $"Supply it via the environment ({TelemetryOptions.SectionName}__ApiKey).");
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}
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}
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return errors.Count == 0
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? ValidateOptionsResult.Success
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: ValidateOptionsResult.Fail(string.Join(" ", errors));
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}
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}
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/// <summary>
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/// Fails the host at startup on a <see cref="TelemetryDialOptions"/> shape that would leave
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/// central unable to dial a node's live-telemetry stream.
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/// </summary>
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public sealed class TelemetryDialOptionsValidator : IValidateOptions<TelemetryDialOptions>
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{
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/// <inheritdoc />
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public ValidateOptionsResult Validate(string? name, TelemetryDialOptions options)
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{
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ArgumentNullException.ThrowIfNull(options);
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var errors = new List<string>();
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var isDps = string.Equals(
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options.Mode, TelemetryDialOptions.ModeDps, StringComparison.OrdinalIgnoreCase);
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var isGrpc = string.Equals(
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options.Mode, TelemetryDialOptions.ModeGrpc, StringComparison.OrdinalIgnoreCase);
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if (!isDps && !isGrpc)
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{
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errors.Add(
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$"{TelemetryDialOptions.SectionName}:{nameof(TelemetryDialOptions.Mode)} is "
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+ $"'{options.Mode}'. Expected '{TelemetryDialOptions.ModeDps}' or "
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+ $"'{TelemetryDialOptions.ModeGrpc}'.");
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}
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if (isGrpc && string.IsNullOrEmpty(options.ApiKey))
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{
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errors.Add(
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$"{TelemetryDialOptions.SectionName}:{nameof(TelemetryDialOptions.ApiKey)} is empty. "
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+ $"Under {TelemetryDialOptions.ModeGrpc} the shared bearer key is the whole "
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+ "authentication boundary to a node's telemetry surface; without it every dial is "
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+ $"rejected. Supply it via the environment ({TelemetryDialOptions.SectionName}__ApiKey).");
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}
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return errors.Count == 0
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? ValidateOptionsResult.Success
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: ValidateOptionsResult.Fail(string.Join(" ", errors));
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}
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}
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