From b81eb5b9f5789c364bd39e14b7e45525480bd0a2 Mon Sep 17 00:00:00 2001 From: Manuel Date: Mon, 25 Aug 2025 23:46:04 +0200 Subject: [PATCH] creates simple healthchecks --- .gitattributes | 63 ++ .gitignore | 365 ++++++++++++ Abstracts/HealthCheck.cs | 11 + Abstracts/HealthCheckSeverity.cs | 5 + Abstracts/IHealthCheck.cs | 16 + Abstracts/IHealthCheckContainer.cs | 17 + Abstracts/IHealthCheckWithOptions.cs | 8 + COPYING.md | 674 ++++++++++++++++++++++ HealthCheckResult.cs | 66 +++ HealthCheckServiceCollectionExtensions.cs | 85 +++ ImAliveHealthcheck.cs | 26 + LICENSE.md | 674 ++++++++++++++++++++++ MCVIngenieros.Healthchecks.csproj | 43 ++ Options/HealthCheckOptions.cs | 8 + Options/HealthChecksConfigs.cs | 20 + Properties/launchSettings.json | 12 + README.md | 183 ++++++ __/HealthCheckContainer.cs | 230 ++++++++ __/HealthCheckContainerOptions.cs | 13 + __/__Controllers/HealthCheckController.cs | 292 ++++++++++ healthchecks.sln | 24 + 21 files changed, 2835 insertions(+) create mode 100644 .gitattributes create mode 100644 .gitignore create mode 100644 Abstracts/HealthCheck.cs create mode 100644 Abstracts/HealthCheckSeverity.cs create mode 100644 Abstracts/IHealthCheck.cs create mode 100644 Abstracts/IHealthCheckContainer.cs create mode 100644 Abstracts/IHealthCheckWithOptions.cs create mode 100644 COPYING.md create mode 100644 HealthCheckResult.cs create mode 100644 HealthCheckServiceCollectionExtensions.cs create mode 100644 ImAliveHealthcheck.cs create mode 100644 LICENSE.md create mode 100644 MCVIngenieros.Healthchecks.csproj create mode 100644 Options/HealthCheckOptions.cs create mode 100644 Options/HealthChecksConfigs.cs create mode 100644 Properties/launchSettings.json create mode 100644 README.md create mode 100644 __/HealthCheckContainer.cs create mode 100644 __/HealthCheckContainerOptions.cs create mode 100644 __/__Controllers/HealthCheckController.cs create mode 100644 healthchecks.sln diff --git a/.gitattributes b/.gitattributes new file mode 100644 index 0000000..1ff0c42 --- /dev/null +++ b/.gitattributes @@ -0,0 +1,63 @@ +############################################################################### +# Set default behavior to automatically normalize line endings. +############################################################################### +* text=auto + +############################################################################### +# Set default behavior for command prompt diff. +# +# This is need for earlier builds of msysgit that does not have it on by +# default for csharp files. +# Note: This is only used by command line +############################################################################### +#*.cs diff=csharp + +############################################################################### +# Set the merge driver for project and solution files +# +# Merging from the command prompt will add diff markers to the files if there +# are conflicts (Merging from VS is not affected by the settings below, in VS +# the diff markers are never inserted). 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RetryAttempts => 2; + public virtual TimeSpan? Timeout => TimeSpan.FromSeconds(3); + public virtual TimeSpan? RetryDelay => TimeSpan.FromSeconds(1); + public virtual HealthCheckSeverity? Severity => HealthCheckSeverity.Critical; + public virtual string? Description => null; + public abstract Task CheckAsync(CancellationToken cancellationToken = default); +} \ No newline at end of file diff --git a/Abstracts/HealthCheckSeverity.cs b/Abstracts/HealthCheckSeverity.cs new file mode 100644 index 0000000..0e02b79 --- /dev/null +++ b/Abstracts/HealthCheckSeverity.cs @@ -0,0 +1,5 @@ +namespace MCVIngenieros.Healthchecks.Abstracts; + +// Severity levels for health checks +public enum HealthCheckSeverity { Info, Warning, Critical } + diff --git a/Abstracts/IHealthCheck.cs b/Abstracts/IHealthCheck.cs new file mode 100644 index 0000000..8cba659 --- /dev/null +++ b/Abstracts/IHealthCheck.cs @@ -0,0 +1,16 @@ +using System.ComponentModel; + +namespace MCVIngenieros.Healthchecks.Abstracts; + +// Health check interface +[EditorBrowsable(EditorBrowsableState.Never)] +public interface IHealthCheck +{ + int? RetryAttempts { get; } + TimeSpan? Timeout { get; } + TimeSpan? RetryDelay { get; } + HealthCheckSeverity? Severity { get; } + string? Description { get; } + + Task CheckAsync(CancellationToken cancellationToken = default); +} \ No newline at end of file diff --git a/Abstracts/IHealthCheckContainer.cs b/Abstracts/IHealthCheckContainer.cs new file mode 100644 index 0000000..a878dcf --- /dev/null +++ b/Abstracts/IHealthCheckContainer.cs @@ -0,0 +1,17 @@ +using System.ComponentModel; + +namespace MCVIngenieros.Healthchecks.Abstracts; + +// Health check container interface +[EditorBrowsable(EditorBrowsableState.Never)] +public interface IHealthCheckContainer +{ + Task> RunAllChecks(CancellationToken cancellationToken = default); + Task RunCheck(string name, CancellationToken cancellationToken = default); + Task> RunChecks(IEnumerable names, CancellationToken cancellationToken = default); + IReadOnlyList GetAllCheckNames(); + void DiscoverHealthChecks(); + IReadOnlyDictionary GetAllChecks(); + Task> GetAllChecksResults(CancellationToken cancellationToken = default); +} + diff --git a/Abstracts/IHealthCheckWithOptions.cs b/Abstracts/IHealthCheckWithOptions.cs new file mode 100644 index 0000000..2594b0e --- /dev/null +++ b/Abstracts/IHealthCheckWithOptions.cs @@ -0,0 +1,8 @@ +using MCVIngenieros.Healthchecks.Options; + +namespace MCVIngenieros.Healthchecks.Abstracts; + +public interface IHealthCheckWithOptions : IHealthCheck +{ + HealthChecksConfigs Options { get; } +} \ No newline at end of file diff --git a/COPYING.md b/COPYING.md new file mode 100644 index 0000000..e72bfdd --- /dev/null +++ b/COPYING.md @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. \ No newline at end of file diff --git a/HealthCheckResult.cs b/HealthCheckResult.cs new file mode 100644 index 0000000..30f8e6a --- /dev/null +++ b/HealthCheckResult.cs @@ -0,0 +1,66 @@ +using MCVIngenieros.Healthchecks.Abstracts; + +namespace MCVIngenieros.Healthchecks; + +// Health check result model +public record HealthCheckResult +{ + public static HealthCheckResult Healthy( + string? msg = null, + HealthCheckSeverity severity = HealthCheckSeverity.Warning, + Exception? exception = null, + Dictionary? data = null + ) + { + return new HealthCheckResult(true) + { + Details = msg ?? "Healthy", + Severity = severity, + Exception = exception, + Data = data, + }; + } + + public static HealthCheckResult Unhealthy( + string? msg = null, + HealthCheckSeverity severity = HealthCheckSeverity.Warning, + Exception? exception = null, + Dictionary? data = null + ) + { + return new HealthCheckResult(false) + { + Details = msg ?? "Unhealthy", + Severity = severity, + Exception = exception, + Data = data, + }; + } + + public HealthCheckResult() { } + public HealthCheckResult(bool IsHealthy) + { + this.IsHealthy = IsHealthy; + } + + public HealthCheckResult(bool IsHealthy, HealthCheckSeverity severity) : this(IsHealthy) + { + this.Severity = severity; + } + + public HealthCheckResult(bool IsHealthy, string name, string details = "", HealthCheckSeverity severity = HealthCheckSeverity.Info, Exception? exception = null, Dictionary? data = null) : this(IsHealthy, severity) + { + this.Name = name; + this.Details = details; + this.Exception = exception; + this.Data = data; + } + + public string Name { get; set; } = string.Empty; + public string Details { get; set; } = string.Empty; + public bool IsHealthy { get; set; } + public HealthCheckSeverity Severity { get; set; } = HealthCheckSeverity.Info; + public Exception? Exception { get; set; } + public Dictionary? Data { get; set; } +} + diff --git a/HealthCheckServiceCollectionExtensions.cs b/HealthCheckServiceCollectionExtensions.cs new file mode 100644 index 0000000..d515c36 --- /dev/null +++ b/HealthCheckServiceCollectionExtensions.cs @@ -0,0 +1,85 @@ +using MCVIngenieros.Healthchecks.__; +using MCVIngenieros.Healthchecks.__.__Controllers; +using MCVIngenieros.Healthchecks.Abstracts; +using MCVIngenieros.Healthchecks.Options; +using Microsoft.Extensions.DependencyInjection.Extensions; +using Microsoft.Extensions.Options; +using System.Reflection; + +namespace MCVIngenieros.Healthchecks; + +// Extension methods for IServiceCollection +public static class HealthCheckServiceCollectionExtensions +{ + private static IServiceCollection AddHealthChecksSupport(this IServiceCollection services, HealthCheckContainerOptions options) + { + ArgumentNullException.ThrowIfNull(services, nameof(services)); + services.AddSingleton(); + services.AddSingleton(Microsoft.Extensions.Options.Options.Create(options)); + services.AddCheck(); + services.AddControllers().AddApplicationPart(typeof(HealthCheckController).Assembly); + return services; + } + + public static IServiceCollection AddHealthChecksSupport(this IServiceCollection services) + { + ArgumentNullException.ThrowIfNull(services, nameof(services)); + var options = new HealthCheckContainerOptions(); + + var scope = services.BuildServiceProvider().CreateScope(); + var config = scope.ServiceProvider.GetRequiredService(); + scope.Dispose(); + services.Configure(nameof(HealthCheckOptions), config.GetSection(nameof(HealthChecksConfigs))); + scope = services.BuildServiceProvider().CreateScope(); + var hcopts = scope.ServiceProvider + .GetRequiredService>().Get(nameof(HealthCheckOptions)); + scope.Dispose(); + + if (!string.IsNullOrWhiteSpace(hcopts.CacheDuration) && TimeSpan.TryParse(hcopts.CacheDuration, out TimeSpan cacheDuration)) + { + options.CacheDuration = cacheDuration; + } + + if (!string.IsNullOrWhiteSpace(hcopts.Timeout) && TimeSpan.TryParse(hcopts.Timeout, out TimeSpan timeout)) + { + options.Timeout = timeout; + } + + if (hcopts.AssembliesToScan != null && hcopts.AssembliesToScan.Length > 0) + { + options.AssembliesToScan = hcopts.AssembliesToScan.Select(Assembly.Load); + } + + return services.AddHealthChecksSupport(options); + } + + public static IServiceCollection AddHealthChecksSupport(this IServiceCollection services, Action? configure = null) + { + ArgumentNullException.ThrowIfNull(services, nameof(services)); + ArgumentNullException.ThrowIfNull(configure, nameof(configure)); + var options = new HealthCheckContainerOptions(); + configure?.Invoke(options); + return services.AddHealthChecksSupport(options); + } + + public static IServiceCollection AddHealthCheck(this IServiceCollection services) + where T : class, IHealthCheck + => services.AddCheck(); + + public static IServiceCollection AddCheck(this IServiceCollection services) + where T : class, IHealthCheck + { + services.TryAddTransient(); + return services; + } + + public static IServiceCollection DiscoverHealthChecks(this IServiceCollection services) + { + // This will trigger the discovery when the container is built + var provider = services.BuildServiceProvider(); + var container = provider.GetRequiredService(); + container.DiscoverHealthChecks(); + return services; + } +} + diff --git a/ImAliveHealthcheck.cs b/ImAliveHealthcheck.cs new file mode 100644 index 0000000..d68a1d6 --- /dev/null +++ b/ImAliveHealthcheck.cs @@ -0,0 +1,26 @@ +using MCVIngenieros.Healthchecks.Abstracts; + +namespace MCVIngenieros.Healthchecks; + +public class ImAliveHealthcheck : IHealthCheck +{ + public int? RetryAttempts => 1; + + public TimeSpan? Timeout => null; + + public TimeSpan? RetryDelay => TimeSpan.Zero; + + public HealthCheckSeverity? Severity => HealthCheckSeverity.Info; + + public string? Description => "Simplest HealthCheck that can be done. It just says: API is alive."; + + public Task CheckAsync(CancellationToken cancellationToken = default) + { + return Task.FromResult(new HealthCheckResult() + { + Details = "API is alive", + Severity = HealthCheckSeverity.Info, + IsHealthy = true + }); + } +} diff --git a/LICENSE.md b/LICENSE.md new file mode 100644 index 0000000..e72bfdd --- /dev/null +++ b/LICENSE.md @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. \ No newline at end of file diff --git a/MCVIngenieros.Healthchecks.csproj b/MCVIngenieros.Healthchecks.csproj new file mode 100644 index 0000000..cb6c333 --- /dev/null +++ b/MCVIngenieros.Healthchecks.csproj @@ -0,0 +1,43 @@ + + + + net9.0 + enable + enable + Library + True + MCVIngenieros.Healthchecks + 0.0.1 + mmorales99 + MANUEL JUAN MORALES AMAT + A READY-TO-USE HEALTHCHECK AID + https://gitea.mcvingenieros.es/manuel + README.md + https://gitea.mcvingenieros.es/manuel + git + healthchecks;qa;easy;readytouse;tests + LICENSE.md + True + True + snupkg + true + False + False + + + + + + + + + True + \ + + + True + \ + + + + diff --git a/Options/HealthCheckOptions.cs b/Options/HealthCheckOptions.cs new file mode 100644 index 0000000..c96720e --- /dev/null +++ b/Options/HealthCheckOptions.cs @@ -0,0 +1,8 @@ +namespace MCVIngenieros.Healthchecks.Options; + +public class HealthCheckOptions +{ + public string? CacheDuration { get; set; } + public string? Timeout { get; set; } + public string[]? AssembliesToScan { get; set; } +} diff --git a/Options/HealthChecksConfigs.cs b/Options/HealthChecksConfigs.cs new file mode 100644 index 0000000..db4212f --- /dev/null +++ b/Options/HealthChecksConfigs.cs @@ -0,0 +1,20 @@ +using MCVIngenieros.Healthchecks.Abstracts; + +namespace MCVIngenieros.Healthchecks.Options; + +public partial class HealthChecksConfigs +{ + public string? Description { get; init; } + public int? RetryAttempts { get; init; } + public TimeSpan? Timeout { get; init; } + public TimeSpan? RetryDelay { get; init; } + public HealthCheckSeverity? Severity { get; init; } + + public static readonly HealthChecksConfigs Default = new() + { + RetryAttempts = 2, + Timeout = TimeSpan.FromMinutes(5), + RetryDelay = TimeSpan.FromMilliseconds(100), + Severity = HealthCheckSeverity.Critical + }; +} diff --git a/Properties/launchSettings.json b/Properties/launchSettings.json new file mode 100644 index 0000000..6c93a67 --- /dev/null +++ b/Properties/launchSettings.json @@ -0,0 +1,12 @@ +{ + "profiles": { + "healthchecks": { + "commandName": "Project", + "launchBrowser": true, + "environmentVariables": { + "ASPNETCORE_ENVIRONMENT": "Development" + }, + "applicationUrl": "https://localhost:62337;http://localhost:62338" + } + } +} \ No newline at end of file diff --git a/README.md b/README.md new file mode 100644 index 0000000..e875fc2 --- /dev/null +++ b/README.md @@ -0,0 +1,183 @@ +# MCVIngenieros.Healthchecks + +LICENCIA: [GNU General Public License v3.0](LICENSE.md) + +Librería para la gestión y exposición de healthchecks personalizables en aplicaciones .NET. Permite definir múltiples chequeos de salud, exponerlos vía API y configurarlos fácilmente. + +## ¿Cómo funciona? + +1. Define tus healthchecks implementando la interfaz `IHealthCheck`. +2. Regístralos en el contenedor de servicios usando los métodos de extensión. +3. Opcionalmente, configura las opciones en `appsettings.json`. +4. Accede a los resultados mediante los endpoints expuestos por el controlador. + +--- + +## Ejemplo de configuración en appsettings.json + +```json appsettings.json +{ + "HealthChecksConfigs": { + "CacheDuration": "00:30:00", + "Timeout": "00:00:05", + "AssembliesToScan": [ + "MyAssembly" + ], + "MyCheck": { + "RetryAttempts": 2, + "Timeout": "00:05:00", + "RetryDelay": "00:00:10", + "Severity": "Info" + } + } +} +``` + +## Ejemplo de configuración en CSharp + +```csharp +builder.Services.AddHealthChecksSupport(); // <--- Usará la configuración de appsettings.json + +builder.Services.AddHealthChecksSupport(options => { + options.AssembliesToScan.Add(typeof(Program).Assembly); + options.CacheDuration = TimeSpan.FromMinutes(10); + options.Timeout = TimeSpan.FromSeconds(5); + options.Threshold = 0.7; +}); +``` + +## Ejemplo de uso en CSharp + +```csharp +// Registro manual de healthchecks +builder.Services.AddHealthChecksSupport() + .AddCheck("Custom"); + +// Registro automático de healthchecks +builder.Services.AddHealthChecksSupport() + .DiscoverHealthChecks(); +``` + +### Ejemplo de implementación de un healthcheck personalizado + +```csharp +public class CustomHealthCheck () : HealthCheck +{ + public string Description => "Custom health check"; + + public Task CheckAsync(CancellationToken cancellationToken = default) + { + // Lógica de chequeo + return Task.FromResult(HealthCheckResult.Healthy("Todo OK")); + } +} +``` + +```csharp +public partial class HealthChecksConfigs : MCVIngenieros.Healthchecks.Options.HealthChecksConfigs +{ + public const string CustomHealthCheckWithOptions = nameof(CustomHealthCheckWithOptions); +} + +--- + +public class CustomHealthCheckWithOptions (IOptionsMonitor healthchecksConfig) : HealthCheck +{ + private readonly HealthChecksConfigs hcConfig = healthchecksConfig.Get(HealthChecksConfigs.CustomHealthCheckWithOptions); + public string Description => hcConfig.Description; + public int? RetryAttempts => hcConfig.RetryAttempts ?? 2; + public TimeSpan? Timeout => hcConfig.Timeout ?? TimeSpan.FromSeconds(5); + public TimeSpan? RetryDelay => hcConfig.RetryDelay ?? TimeSpan.FromSeconds(1); + public HealthCheckSeverity? Severity => hcConfig.Severity ?? HealthCheckSeverity.Critical; + + public Task CheckAsync(CancellationToken cancellationToken = default) + { + // Lógica de chequeo + return Task.FromResult(HealthCheckResult.Healthy("Todo OK")); + } +} +``` + +## Endpoints disponibles + +La librería expone un controlador con endpoints como: + +- `GET /health` — Estado general de la aplicación con detalle de todos los healthchecks. +- `GET /health/{nombre}` — Estado de un healthcheck específico. + +Ejemplo de llamada con curl: + +```bash +curl http://localhost:5000/health +curl http://localhost:5000/health/Database +``` + +_Si se envia Acept `*/*` o `text/html`, o se usa un User-Agent compatible, se devolverá un HTML con el estado de los healthchecks y una interfaz interactiva para la consulta y visualización de resultados. También permite ejecutar uno o varios checks al momento_ + +### Ejemplos avanzados + +```json appsettings.json +{ + "HealthChecksConfigs": { + "CacheDuration": "00:30:00", + "Timeout": "00:02:00", + "AssembliesToScan": [ + "MCVIngenieros.Backend" + ], + "MyCheck": { + "RetryAttempts": 5, + "Timeout": "00:00:30", + "RetryDelay": "00:00:10", + "Severity": "Critical" + } + } +} +``` + +```csharp +public partial class HealthChecksConfigs : MCVIngenieros.Healthchecks.Options.HealthChecksConfigs +{ + public const string CustomHealthCheckWithOptions = nameof(CustomHealthCheckWithOptions); +} + +--- + +public class CustomHealthCheckWithOptions (IDistributedCache redis, IOptionsMonitor healthchecksConfig) : HealthCheck +{ + private readonly HealthChecksConfigs hcConfig = healthchecksConfig.Get(HealthChecksConfigs.CustomHealthCheckWithOptions); + public string Description => hcConfig.Description; + public int? RetryAttempts => hcConfig.RetryAttempts ?? 2; + public TimeSpan? Timeout => hcConfig.Timeout ?? TimeSpan.FromSeconds(5); + public TimeSpan? RetryDelay => hcConfig.RetryDelay ?? TimeSpan.FromSeconds(1); + public HealthCheckSeverity? Severity => hcConfig.Severity ?? HealthCheckSeverity.Critical; + + public async Task CheckAsync(CancellationToken cancellationToken = default) + { + try + { + var result = await redis.GetStringAsync("healthcheck"); + return result != null + ? HealthCheckResult.Healthy("Todo OK", HealthCheckSeverity.Info) + : HealthCheckResult.Unhealthy( + "No se encontró el estado", + HealthCheckSeverity.Critical, + Data: new Dictionary { + { "CacheKey", "healthcheck" }, + { "RedisValue", result }, + { "RedisInstance", redis.InstanceName } + }); + } + catch (Exception ex) + { + return HealthCheckResult.Unhealthy( + "Error", + HealthCheckSeverity.Critical, + Exception: ex, + Data: new Dictionary { + { "BaseException", ex.GetBaseException() }, + { "RedisInstance", redis.InstanceName } + }); + } + } +} +``` \ No newline at end of file diff --git a/__/HealthCheckContainer.cs b/__/HealthCheckContainer.cs new file mode 100644 index 0000000..0acbbf1 --- /dev/null +++ b/__/HealthCheckContainer.cs @@ -0,0 +1,230 @@ +using MCVIngenieros.Healthchecks.Abstracts; +using MCVIngenieros.Healthchecks.Options; +using Microsoft.Extensions.Options; +using System.Collections.Concurrent; +using System.Collections.Immutable; +using System.ComponentModel; +using System.Reflection; + +namespace MCVIngenieros.Healthchecks.__; + +// Health check container implementation +[EditorBrowsable(EditorBrowsableState.Never)] +public sealed class HealthCheckContainer : IHealthCheckContainer, IDisposable +{ + private readonly IServiceProvider provider; + private readonly ILogger _logger; + private readonly TimeSpan _cacheDuration; + private readonly TimeSpan? _timeout; + private readonly static ConcurrentDictionary _checkTypes = new(); + private readonly ConcurrentDictionary _cache = new(); + private readonly CancellationTokenSource _cts = new(); + private readonly Task _backgroundTask; + private readonly Assembly[]? _assembliesToScan; + + public HealthCheckContainer(IServiceProvider provider, ILogger logger, IOptions options) + { + this.provider = provider; + _logger = logger; + _cacheDuration = options.Value.CacheDuration; + _timeout = options.Value.Timeout; + + _assembliesToScan = options.Value.AssembliesToScan?.ToArray() ?? null; + _assembliesToScan = _assembliesToScan?.Distinct().ToArray(); + + LoadHealthChecks(); + + // Start background refresh + _backgroundTask = Task.Run(() => BackgroundRefreshAsync(_cts.Token)); + } + + public void LoadHealthChecks() + { + var checks = provider.GetServices(); + foreach (var check in checks) + { + var type = check.GetType(); + if (_checkTypes.TryAdd(type.Name, type)) + { + _logger.LogInformation($"Loaded health check: {type.Name}"); + } + else + { + _logger.LogInformation($"Health check {type.Name} is already registered. Skipping duplicate."); + } + } + } + + // Discover all IHealthCheck implementations in loaded assemblies + public void DiscoverHealthChecks() + { + if (_assembliesToScan == null) + return; + + foreach (var assembly in _assembliesToScan) + { + var checkTypes = assembly.GetTypes() + .Where(t => typeof(IHealthCheck).IsAssignableFrom(t) && !t.IsInterface && !t.IsAbstract); + + assembly.GetReferencedAssemblies() + .Select(Assembly.Load) + .ToList() + .ForEach(a => + { + var types = a.GetTypes() + .Where(t => typeof(IHealthCheck).IsAssignableFrom(t) && !t.IsInterface && !t.IsAbstract); + checkTypes = checkTypes.Concat(types); + }); + + checkTypes = checkTypes.Distinct(); + + foreach (var type in checkTypes) + { + if (_checkTypes.TryAdd(type.Name, type)) + { + _logger.LogInformation($"Discovered health check: {type.Name}"); + } + else + { + _logger.LogInformation($"Health check {type.Name} is already registered. Skipping duplicate."); + } + } + } + } + + public IReadOnlyList GetAllCheckNames() => [.. _checkTypes.Keys]; + + public async Task> RunAllChecks(CancellationToken cancellationToken = default) + { + _logger.LogInformation("Running all health checks..."); + var tasks = _checkTypes.Keys.Select(name => RunCheck(name, cancellationToken)); + var results = await Task.WhenAll(tasks); + _logger.LogInformation("Completed running all health checks."); + return results.Where(r => r != null).ToList()!; + } + + public Task> GetAllChecksResults(CancellationToken cancellationToken = default) + { + var results = new List(); + foreach (var item in _cache) + { + results.Add(item.Value.Result); + } + return Task.FromResult(results); + } + + public async Task RunCheck(string name, CancellationToken cancellationToken = default) + { + var now = DateTime.UtcNow; + _logger.LogInformation($"Running health check: {name}"); + if (!_checkTypes.TryGetValue(name, out var type)) + { + _logger.LogWarning($"Health check {name} not found."); + return null; + } + if (_cache.TryGetValue(name, out var cached) && now - cached.LastUpdate < _cacheDuration) + { + _logger.LogInformation($"Returning cached result for {name}."); + return cached.Result; + } + var result = await RunCheckInstanceAsync(type, cancellationToken); + _cache[name] = (result, DateTime.UtcNow); + _logger.LogInformation($"Health check {name} completed. Result: {(result.IsHealthy ? "Healthy" : "Unhealthy")}"); + return result; + } + + public async Task> RunChecks(IEnumerable names, CancellationToken cancellationToken = default) + { + _logger.LogInformation($"Running health checks: {string.Join(", ", names)}"); + var tasks = names.Select(name => RunCheck(name, cancellationToken)); + var results = await Task.WhenAll(tasks); + _logger.LogInformation($"Completed running specified health checks. Runned {results.Count(r => r != null)} checks."); + return results.Where(r => r != null).ToList()!; + } + + // Background refresh of all checks + private async Task BackgroundRefreshAsync(CancellationToken cancellationToken) + { + while (!cancellationToken.IsCancellationRequested) + { + try + { + var tasks = _checkTypes.Keys.Select(name => RunCheck(name, cancellationToken)); + await Task.WhenAll(tasks); + } + catch (Exception ex) + { + _logger.LogError(ex, "Error during background health check refresh"); + } + await Task.Delay(_cacheDuration, cancellationToken); + } + } + + // Run a single check instance with timeout, retry, circuit breaker, fallback + private async Task RunCheckInstanceAsync(Type type, CancellationToken cancellationToken) + { + _logger.LogInformation($"Starting health check: {type.Name}"); + var name = type.Name; + var logger = provider.GetService(typeof(ILogger<>).MakeGenericType(type)) as ILogger; + try + { + IHealthCheck? check = ActivatorUtilities.CreateInstance(provider, type) as IHealthCheck + ?? throw new InvalidOperationException($"Could not create health check: {name}"); + var retry = check.RetryAttempts ?? HealthChecksConfigs.Default.RetryAttempts; + TimeSpan timeout = (TimeSpan)((check.Timeout ?? _timeout) ?? HealthChecksConfigs.Default.Timeout!); + TimeSpan delay = (TimeSpan)(check.RetryDelay ?? HealthChecksConfigs.Default.RetryDelay!); + + for (int attempt = 0; attempt <= retry; attempt++) + { + try + { + using var cts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken); + cts.CancelAfter(timeout); + var result = await check.CheckAsync(cts.Token); + _logger.LogInformation($"Health check {name} completed. Result: {(result.IsHealthy ? "Healthy" : "Unhealthy")}"); + result.Name = name; + return result; + } + catch (Exception ex) + { + logger?.LogError(ex, $"Health check {name} failed on attempt {attempt + 1} -- Exception was not controlled."); + if (attempt == retry) + { + return new HealthCheckResult(false) + { + Name = name, + Details = $"Exception: {ex.GetBaseException().Message} -- StackTrace: {ex.GetBaseException().StackTrace}", + Severity = HealthCheckSeverity.Critical + }; + } + await Task.Delay(delay, cancellationToken); + } + } + } + catch (Exception ex) + { + _logger.LogError(ex.GetBaseException(), $"Error creating instance of health check {name}"); + return new HealthCheckResult(false) { Name = name, Details = $"Error creating instance: {ex.GetBaseException().Message}", Severity = HealthCheckSeverity.Critical }; + } + return new HealthCheckResult(false) { Name = name, Details = "Unknown error", Severity = HealthCheckSeverity.Critical }; + } + + public void Dispose() + { + _cts.Cancel(); + _backgroundTask?.Dispose(); + _cts.Dispose(); + } + + public IReadOnlyDictionary GetAllChecks() + { + var dict = new Dictionary(); + foreach (var item in _checkTypes.ToImmutableDictionary()) + { + IHealthCheck? check = (IHealthCheck?)ActivatorUtilities.CreateInstance(provider, item.Value); + if (check == null) continue; + dict[item.Key] = check; + } + return dict.ToImmutableDictionary(); + } +} \ No newline at end of file diff --git a/__/HealthCheckContainerOptions.cs b/__/HealthCheckContainerOptions.cs new file mode 100644 index 0000000..08f570e --- /dev/null +++ b/__/HealthCheckContainerOptions.cs @@ -0,0 +1,13 @@ +using System.ComponentModel; + +namespace MCVIngenieros.Healthchecks.__; + +// Options for health check container +[EditorBrowsable(EditorBrowsableState.Never)] +public sealed class HealthCheckContainerOptions +{ + public TimeSpan CacheDuration { get; set; } = TimeSpan.FromMinutes(10); + public TimeSpan Timeout { get; set; } = TimeSpan.FromSeconds(3); + public IEnumerable AssembliesToScan { get; set; } = []; +} + diff --git a/__/__Controllers/HealthCheckController.cs b/__/__Controllers/HealthCheckController.cs new file mode 100644 index 0000000..feda73e --- /dev/null +++ b/__/__Controllers/HealthCheckController.cs @@ -0,0 +1,292 @@ +using MCVIngenieros.Healthchecks.Abstracts; +using Microsoft.AspNetCore.Mvc; +using System.ComponentModel; +using System.Drawing; +using System.Net.Mime; + +namespace MCVIngenieros.Healthchecks.__.__Controllers; + +[ApiController, Route("api/health"), EditorBrowsable(EditorBrowsableState.Never)] +public sealed class HealthCheckController(IHealthCheckContainer container, ILogger logger) : ControllerBase +{ + private readonly IHealthCheckContainer _container = container; + private readonly ILogger _logger = logger; + + [HttpGet] + public async Task Run([FromQuery] string? checks = null, CancellationToken cancellationToken = default) + { + _logger.LogInformation($"Health check requested for checks: {checks ?? "ALL"}"); + List results; + if (!string.IsNullOrEmpty(checks)) + { + var names = checks.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries); + await _container.RunChecks(names, cancellationToken); + } + else + { + await _container.RunAllChecks(cancellationToken); + } + results = await _container.GetAllChecksResults(cancellationToken); + + var status = results.All(r => r.IsHealthy) ? "Healthy" : "Unhealthy"; + var code = results.All(r => r.IsHealthy) ? 200 : 503; + var acceptHeader = Request.Headers.Accept.ToString(); + var userAgent = Request.Headers.UserAgent.ToString(); + if (IsBrowser(Request)) + { + return Content(RenderHtml(status, results, _container), MediaTypeNames.Text.Html); + } + else + { + var response = new + { + status, + results = results.ToDictionary(r => r.Name, r => new { isHealthy = r.IsHealthy, details = r.Details, severity = r.Severity.ToString() }) + }; + return StatusCode(code, response); + } + } + + [HttpGet, Route("{checkName}")] + public async Task Get([FromRoute] string checkName, CancellationToken cancellationToken = default) + { + var result = await _container.RunCheck(checkName, cancellationToken); + if (result == null) + { + _logger.LogWarning($"Health check '{checkName}' not found."); + return NotFound(); + } + _logger.LogWarning($"Health check requested for {checkName}."); + + var status = result.IsHealthy ? "Healthy" : "Unhealthy"; + var code = result.IsHealthy ? 200 : 503; + var response = new + { + status, + result = result == null ? null : new { isHealthy = result.IsHealthy, details = result.Details, severity = result.Severity.ToString() } + }; + return StatusCode(code, response); + } + + private static bool UserAgentIndicatesBrowser(string userAgent) + => !string.IsNullOrEmpty(userAgent) && ( + userAgent.Contains("Mozilla", StringComparison.OrdinalIgnoreCase) + || userAgent.Contains("Chrome", StringComparison.OrdinalIgnoreCase) + || userAgent.Contains("Safari", StringComparison.OrdinalIgnoreCase) + || userAgent.Contains("Edge", StringComparison.OrdinalIgnoreCase) + ); + + private static bool AcceptsHtml(string acceptHeader) + => !string.IsNullOrEmpty(acceptHeader) + && acceptHeader.Contains("text/html", StringComparison.OrdinalIgnoreCase); + + private static bool IsBrowser(HttpRequest request) + => AcceptsHtml(request.Headers["Accept"].ToString()) + || UserAgentIndicatesBrowser(request.Headers["User-Agent"].ToString()); + + private static string GetSeverityClases() + { + var severitiesDict = Enum.GetValues() + .Cast() + .ToDictionary(e => (int)e, e => e.ToString()); + + var totalSeverities = severitiesDict.Count; + var colores = ColorInterpolation.GenerateColorGradient(totalSeverities); + string cssClasses = string.Empty; + int i = 0; + foreach (var item in severitiesDict) + { + string cssClass = $".{item.Value}{{ color: {colores[i++]}; font-weight: bold; }}"; + cssClasses += cssClass + Environment.NewLine; + } + return cssClasses; + } + + // Render HTML page for browser + private static string RenderHtml(string status, List results, IHealthCheckContainer container) + { + var severitiesDict = Enum.GetValues() + .Cast() + .ToDictionary(e => (int)e, e => e.ToString()); + var healthy = status == "Healthy"; + var bannerColor = healthy ? "#4caf50" : "#f44336"; + var html = $@" + + + + + Health Checks + + + +
Health Status: {status}
+
+

Health Check Results

+ + + + + + {string.Join("", results.Select((r, idx) => $"" + + @$"" + + $"" + + $"" + + @$"" + + $"" + + ""))} + +
SelectedNameStatusSeverityDetails
{r.Name.Replace("HealthCheck", "", StringComparison.OrdinalIgnoreCase)}{(r.IsHealthy ? "Healthy" : "Unhealthy")}{r.Severity}{System.Net.WebUtility.HtmlEncode(r.Details)}
+
+

Run Selected Checks

+
+ +
+
+
+
+ × +

+
+
+
+ +
+ +"; + return html; + } + + public class ColorInterpolation + { + // Convierte un código hex a Color + private static Color HexToColor(string hex) + { + return ColorTranslator.FromHtml(hex); + } + + // Convierte Color a código hex + private static string ColorToHex(Color color) + { + return $"#{color.R:X2}{color.G:X2}{color.B:X2}"; + } + + // Interpola entre dos colores según factor (0 a 1) + private static Color InterpolateColor(Color start, Color end, double factor) + { + int r = (int)(start.R + factor * (end.R - start.R)); + int g = (int)(start.G + factor * (end.G - start.G)); + int b = (int)(start.B + factor * (end.B - start.B)); + return Color.FromArgb(r, g, b); + } + + // Genera una lista de colores interpolados para n valores + public static List GenerateColorGradient(int n) + { + var startColor = HexToColor("#4caf50"); // verde + var midColor = HexToColor("#e5be01"); // amarillo + var endColor = HexToColor("#f44336"); // rojo + + var colors = new List(n); + + for (int i = 0; i < n; i++) + { + double factor = (double)i / (n - 1); + if (factor <= 0.5) + { + double localFactor = factor / 0.5; + var c = InterpolateColor(startColor, midColor, localFactor); + colors.Add(ColorToHex(c)); + } + else + { + double localFactor = (factor - 0.5) / 0.5; + var c = InterpolateColor(midColor, endColor, localFactor); + colors.Add(ColorToHex(c)); + } + } + + return colors; + } + } +} + diff --git a/healthchecks.sln b/healthchecks.sln new file mode 100644 index 0000000..6c237db --- /dev/null +++ b/healthchecks.sln @@ -0,0 +1,24 @@ +Microsoft Visual Studio Solution File, Format Version 12.00 +# Visual Studio Version 17 +VisualStudioVersion = 17.5.2.0 +MinimumVisualStudioVersion = 10.0.40219.1 +Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MCVIngenieros.Healthchecks", "MCVIngenieros.Healthchecks.csproj", "{9D4D28DE-7C25-08C4-0A37-9E0E9439A1F0}" +EndProject +Global + GlobalSection(SolutionConfigurationPlatforms) = preSolution + Debug|Any CPU = Debug|Any CPU + Release|Any CPU = Release|Any CPU + EndGlobalSection + GlobalSection(ProjectConfigurationPlatforms) = postSolution + {9D4D28DE-7C25-08C4-0A37-9E0E9439A1F0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU + {9D4D28DE-7C25-08C4-0A37-9E0E9439A1F0}.Debug|Any CPU.Build.0 = Debug|Any CPU + {9D4D28DE-7C25-08C4-0A37-9E0E9439A1F0}.Release|Any CPU.ActiveCfg = Release|Any CPU + {9D4D28DE-7C25-08C4-0A37-9E0E9439A1F0}.Release|Any CPU.Build.0 = Release|Any CPU + EndGlobalSection + GlobalSection(SolutionProperties) = preSolution + HideSolutionNode = FALSE + EndGlobalSection + GlobalSection(ExtensibilityGlobals) = postSolution + SolutionGuid = {30D89C0F-E469-4E8D-BEF7-C91EC94F6D0E} + EndGlobalSection +EndGlobal