Simplify how we use validation

src/Promitor.Agents.Scraper/Validation/Interfaces/IValidationStep.cs → src/Promitor.Agents.Core/Validation/Interfaces/IValidationStep.cs

@@ -1,4 +1,4 @@
-namespace Promitor.Agents.Scraper.Validation.Interfaces
+namespace Promitor.Agents.Core.Validation.Interfaces
 {
     public interface IValidationStep
     {

src/Promitor.Agents.Scraper/Validation/RuntimeValidator.cs → src/Promitor.Agents.Core/Validation/RuntimeValidator.cs

@@ -1,41 +1,21 @@
 using System.Collections.Generic;
 using System.Linq;
-using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.Options;
-using Promitor.Agents.Scraper.Configuration;
-using Promitor.Core.Scraping.Configuration.Providers.Interfaces;
-using Promitor.Agents.Scraper.Validation.Interfaces;
-using Promitor.Agents.Scraper.Validation.Steps;
-using Promitor.Agents.Scraper.Validation.Steps.Sinks;
-using Promitor.Core.Scraping.Configuration.Runtime;
+using Promitor.Agents.Core.Validation.Interfaces;
 
 #pragma warning disable 618
-namespace Promitor.Agents.Scraper.Validation
+namespace Promitor.Agents.Core.Validation
 {
     public class RuntimeValidator
     {
         private readonly ILogger _validationLogger;
         private readonly List<IValidationStep> _validationSteps;
 
-        public RuntimeValidator(
-            IOptions<ScraperRuntimeConfiguration> runtimeConfiguration,
-            IOptions<MetricsConfiguration> metricsConfiguration,
-            ILogger<RuntimeValidator> validatorLogger,
-            IMetricsDeclarationProvider scrapeConfigurationProvider,
-            IConfiguration configuration)
+        public RuntimeValidator(IEnumerable<IValidationStep> validationSteps,
+            ILogger<RuntimeValidator> validatorLogger)
         {
             _validationLogger = validatorLogger;
-
-            _validationSteps = new List<IValidationStep>
-            {
-                new ConfigurationPathValidationStep(metricsConfiguration, _validationLogger),
-                new AzureAuthenticationValidationStep(configuration, _validationLogger),
-                new MetricsDeclarationValidationStep(scrapeConfigurationProvider,  _validationLogger),
-                new ResourceDiscoveryValidationStep(runtimeConfiguration.Value.ResourceDiscovery, scrapeConfigurationProvider, _validationLogger),
-                new StatsDMetricSinkValidationStep(runtimeConfiguration,  _validationLogger),
-                new PrometheusScrapingEndpointMetricSinkValidationStep(runtimeConfiguration,  _validationLogger)
-            };
+            _validationSteps = validationSteps.ToList();
         }
 
         /// <summary>

src/Promitor.Agents.Scraper/Validation/Steps/ValidationStep.cs → src/Promitor.Agents.Core/Validation/Steps/ValidationStep.cs

@@ -1,6 +1,6 @@
 using Microsoft.Extensions.Logging;
 
-namespace Promitor.Agents.Scraper.Validation.Steps
+namespace Promitor.Agents.Core.Validation.Steps
 {
     public class ValidationStep
     {

src/Promitor.Agents.Scraper/Validation/ValidationResult.cs → src/Promitor.Agents.Core/Validation/ValidationResult.cs

@@ -1,7 +1,7 @@
 using System.Collections.Generic;
 using System.Text;
 
-namespace Promitor.Agents.Scraper.Validation
+namespace Promitor.Agents.Core.Validation
 {
     public class ValidationResult
     {

src/Promitor.Agents.Scraper/Extensions/IServiceCollectionExtensions.cs

@@ -5,6 +5,8 @@
 using Promitor.Agents.Core.Configuration.Server;
 using Promitor.Agents.Core.Configuration.Telemetry;
 using Promitor.Agents.Core.Configuration.Telemetry.Sinks;
+using Promitor.Agents.Core.Validation;
+using Promitor.Agents.Core.Validation.Interfaces;
 using Promitor.Agents.Scraper;
 using Promitor.Agents.Scraper.Configuration;
 using Promitor.Agents.Scraper.Configuration.Sinks;
@@ -15,7 +17,8 @@
 using Promitor.Core.Scraping.Configuration.Serialization.v1.Core;
 using Promitor.Core.Scraping.Configuration.Serialization.v1.Model;
 using Promitor.Core.Scraping.Factories;
-using Promitor.Agents.Scraper.Validation;
+using Promitor.Agents.Scraper.Validation.Steps;
+using Promitor.Agents.Scraper.Validation.Steps.Sinks;
 using Promitor.Core.Metrics;
 using Promitor.Core.Metrics.Sinks;
 using Promitor.Core.Scraping.Configuration.Runtime;
@@ -42,7 +45,6 @@ public static IServiceCollection DefineDependencies(this IServiceCollection serv
             services.AddTransient<IMetricsDeclarationProvider, MetricsDeclarationProvider>();
             services.AddTransient<IRuntimeMetricsCollector, RuntimeMetricsCollector>();
             services.AddTransient<MetricScraperFactory>();
-            services.AddTransient<RuntimeValidator>();
             services.AddTransient<ConfigurationSerializer>();
             services.AddSingleton<AzureMonitorClientFactory>();
 
@@ -61,6 +63,22 @@ public static IServiceCollection DefineDependencies(this IServiceCollection serv
 
             return services;
         }
+        /// <summary>
+        ///     Defines the validation for when Promitor starts up
+        /// </summary>
+        /// <param name="services">Collections of services in application</param>
+        public static IServiceCollection ConfigureValidation(this IServiceCollection services)
+        {
+            services.AddTransient<IValidationStep, ConfigurationPathValidationStep>();
+            services.AddTransient<IValidationStep, AzureAuthenticationValidationStep>();
+            services.AddTransient<IValidationStep, MetricsDeclarationValidationStep>();
+            services.AddTransient<IValidationStep, ResourceDiscoveryValidationStep>();
+            services.AddTransient<IValidationStep, StatsDMetricSinkValidationStep>();
+            services.AddTransient<IValidationStep, PrometheusScrapingEndpointMetricSinkValidationStep>();
+            services.AddTransient<RuntimeValidator>();
+
+            return services;
+        }
 
         /// <summary>
         ///     Adds the required metric sinks

src/Promitor.Agents.Scraper/Program.cs

@@ -6,7 +6,7 @@
 using Promitor.Agents.Core;
 using Promitor.Agents.Core.Configuration.Server;
 using Promitor.Agents.Core.Extensions;
-using Promitor.Agents.Scraper.Validation;
+using Promitor.Agents.Core.Validation;
 using Promitor.Core;
 using Serilog;
 

src/Promitor.Agents.Scraper/Startup.cs

@@ -41,6 +41,7 @@ public void ConfigureServices(IServiceCollection services)
                 .AddHttpCorrelation()
                 .AddAutoMapper(typeof(V1MappingProfile).Assembly)
                 .DefineDependencies()
+                .ConfigureValidation()
                 .ConfigureYamlConfiguration(Configuration)
                 .UseOpenApiSpecifications("Promitor - Scraper API v1", openApiDescription, 1);
 

src/Promitor.Agents.Scraper/Validation/Exceptions/ValidationFailedException.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using Promitor.Agents.Core.Validation;
 
 namespace Promitor.Agents.Scraper.Validation.Exceptions
 {

src/Promitor.Agents.Scraper/Validation/Steps/AzureAuthenticationValidationStep.cs

@@ -1,8 +1,9 @@
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.Logging.Abstractions;
+using Promitor.Agents.Core.Validation;
+using Promitor.Agents.Core.Validation.Interfaces;
+using Promitor.Agents.Core.Validation.Steps;
 using Promitor.Core;
-using Promitor.Agents.Scraper.Validation.Interfaces;
 
 namespace Promitor.Agents.Scraper.Validation.Steps
 {
@@ -12,11 +13,7 @@ public class AzureAuthenticationValidationStep : ValidationStep, IValidationStep
 
         public string ComponentName { get; } = "Azure Authentication";
 
-        public AzureAuthenticationValidationStep(IConfiguration configuration) : this(configuration, NullLogger.Instance)
-        {
-        }
-
-        public AzureAuthenticationValidationStep(IConfiguration configuration, ILogger logger) : base(logger)
+        public AzureAuthenticationValidationStep(IConfiguration configuration, ILogger<AzureAuthenticationValidationStep> logger) : base(logger)
         {
             _configuration = configuration;
         }

src/Promitor.Agents.Scraper/Validation/Steps/ConfigurationPathValidationStep.cs

@@ -1,8 +1,9 @@
 using System.IO;
 using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.Logging.Abstractions;
 using Microsoft.Extensions.Options;
-using Promitor.Agents.Scraper.Validation.Interfaces;
+using Promitor.Agents.Core.Validation;
+using Promitor.Agents.Core.Validation.Interfaces;
+using Promitor.Agents.Core.Validation.Steps;
 using Promitor.Core.Scraping.Configuration.Runtime;
 
 namespace Promitor.Agents.Scraper.Validation.Steps
@@ -12,12 +13,7 @@ public class ConfigurationPathValidationStep : ValidationStep, IValidationStep
         private readonly IOptions<MetricsConfiguration> _metricsConfiguration;
         public string ComponentName { get; } = "Metrics Declaration Path";
 
-        public ConfigurationPathValidationStep(IOptions<MetricsConfiguration> metricsConfiguration) : this(metricsConfiguration, NullLogger.Instance)
-        {
-            _metricsConfiguration = metricsConfiguration;
-        }
-
-        public ConfigurationPathValidationStep(IOptions<MetricsConfiguration> metricsConfiguration, ILogger logger) : base(logger)
+        public ConfigurationPathValidationStep(IOptions<MetricsConfiguration> metricsConfiguration, ILogger<ConfigurationPathValidationStep> logger) : base(logger)
         {
             _metricsConfiguration = metricsConfiguration;
         }

src/Promitor.Agents.Scraper/Validation/Steps/MetricsDeclarationValidationStep.cs

@@ -2,13 +2,14 @@
 using System.Collections.Generic;
 using System.Linq;
 using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.Logging.Abstractions;
+using Promitor.Agents.Core.Validation;
+using Promitor.Agents.Core.Validation.Interfaces;
+using Promitor.Agents.Core.Validation.Steps;
 using Promitor.Core.Scraping.Configuration.Model;
 using Promitor.Core.Scraping.Configuration.Model.Metrics;
 using Promitor.Core.Scraping.Configuration.Providers.Interfaces;
 using Promitor.Core.Scraping.Configuration.Serialization;
 using Promitor.Core.Serialization.Yaml;
-using Promitor.Agents.Scraper.Validation.Interfaces;
 using Promitor.Agents.Scraper.Validation.MetricDefinitions;
 using Promitor.Core.Contracts.ResourceTypes;
 
@@ -17,12 +18,8 @@ namespace Promitor.Agents.Scraper.Validation.Steps
     public class MetricsDeclarationValidationStep : ValidationStep, IValidationStep
     {
         private readonly IMetricsDeclarationProvider _metricsDeclarationProvider;
-
-        public MetricsDeclarationValidationStep(IMetricsDeclarationProvider metricsDeclarationProvider) : this(metricsDeclarationProvider, NullLogger.Instance)
-        {
-        }
-
-        public MetricsDeclarationValidationStep(IMetricsDeclarationProvider metricsDeclarationProvider, ILogger logger) : base( logger)
+
+        public MetricsDeclarationValidationStep(IMetricsDeclarationProvider metricsDeclarationProvider, ILogger<MetricsDeclarationValidationStep> logger) : base( logger)
         {
             _metricsDeclarationProvider = metricsDeclarationProvider;
         }

src/Promitor.Agents.Scraper/Validation/Steps/ResourceDiscoveryValidationStep.cs

@@ -1,36 +1,33 @@
 using System.Collections.Generic;
 using System.Linq;
 using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.Logging.Abstractions;
+using Microsoft.Extensions.Options;
+using Promitor.Agents.Core.Validation;
+using Promitor.Agents.Core.Validation.Interfaces;
+using Promitor.Agents.Core.Validation.Steps;
 using Promitor.Agents.Scraper.Configuration;
-using Promitor.Agents.Scraper.Validation.Interfaces;
 using Promitor.Core.Scraping.Configuration.Providers.Interfaces;
-using Promitor.Core.Scraping.Configuration.Serialization;
 
 namespace Promitor.Agents.Scraper.Validation.Steps
 {
     public class ResourceDiscoveryValidationStep : ValidationStep, IValidationStep
     {
         private const string NoDiscoveryConfiguredError = "Resource discovery groups are defined in your metrics configuration, but resource discovery has not been configured in the runtime configuration. Please add a resource discovery configuration for Promitor Scraper runtime.";
+        private readonly IOptions<ResourceDiscoveryConfiguration> _resourceDiscoveryConfiguration;
         private readonly IMetricsDeclarationProvider _metricsDeclarationProvider;
-        private readonly ResourceDiscoveryConfiguration _configuration;
 
-        public ResourceDiscoveryValidationStep(ResourceDiscoveryConfiguration configuration, IMetricsDeclarationProvider metricsDeclarationProvider) : this(configuration, metricsDeclarationProvider, NullLogger.Instance)
-        {
-        }
-
-        public ResourceDiscoveryValidationStep(ResourceDiscoveryConfiguration configuration, IMetricsDeclarationProvider metricsDeclarationProvider, ILogger logger) : base( logger)
+        public ResourceDiscoveryValidationStep(IOptions<ResourceDiscoveryConfiguration> resourceDiscoveryResourceDiscoveryConfiguration, IMetricsDeclarationProvider metricsDeclarationProvider, ILogger<ResourceDiscoveryValidationStep> logger) : base( logger)
         {
             _metricsDeclarationProvider = metricsDeclarationProvider;
-            _configuration = configuration;
+            _resourceDiscoveryConfiguration = resourceDiscoveryResourceDiscoveryConfiguration;
         }
 
         public string ComponentName { get; } = "Resource Discovery";
 
         public ValidationResult Run()
         {
             var doesDeclareResourceDiscoveryGroups = DetermineIfDiscoveryGroupsAreDefined();
-            if (_configuration == null)
+            if (_resourceDiscoveryConfiguration == null)
             {
                 if (doesDeclareResourceDiscoveryGroups)
                 {
@@ -41,23 +38,22 @@ public ValidationResult Run()
             }
 
             var errorMessages = new List<string>();
-            if (string.IsNullOrWhiteSpace(_configuration.Host))
+            if (string.IsNullOrWhiteSpace(_resourceDiscoveryConfiguration.Value.Host))
             {
                 errorMessages.Add( "No host name for resource discovery was configured");
             }
 
-            if (_configuration.Port <= 0)
+            if (_resourceDiscoveryConfiguration.Value.Port <= 0)
             {
-                errorMessages.Add($"No valid port ({_configuration.Port}) for resource discovery was configured");
+                errorMessages.Add($"No valid port ({_resourceDiscoveryConfiguration.Value.Port}) for resource discovery was configured");
             }
 
             return errorMessages.Any() ? ValidationResult.Failure(ComponentName, errorMessages) : ValidationResult.Successful(ComponentName);
         }
 
         private bool DetermineIfDiscoveryGroupsAreDefined()
         {
-            var errorReporter = new ErrorReporter();
-            var metricsDeclaration = _metricsDeclarationProvider.Get(applyDefaults: true, errorReporter: errorReporter);
+            var metricsDeclaration = _metricsDeclarationProvider.Get(applyDefaults: true);
             return metricsDeclaration.Metrics.Any(metricDefinition => metricDefinition.ResourceDiscoveryGroups?.Count >= 1);
         }
     }

src/Promitor.Agents.Scraper/Validation/Steps/Sinks/PrometheusScrapingEndpointMetricSinkValidationStep.cs

@@ -1,21 +1,16 @@
 using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.Logging.Abstractions;
 using Microsoft.Extensions.Options;
+using Promitor.Agents.Core.Validation;
+using Promitor.Agents.Core.Validation.Interfaces;
+using Promitor.Agents.Core.Validation.Steps;
 using Promitor.Agents.Scraper.Configuration;
-using Promitor.Agents.Scraper.Validation.Interfaces;
 
 namespace Promitor.Agents.Scraper.Validation.Steps.Sinks
 {
     public class PrometheusScrapingEndpointMetricSinkValidationStep : ValidationStep, IValidationStep
     {
         private readonly IOptions<ScraperRuntimeConfiguration> _runtimeConfiguration;
-
-        public PrometheusScrapingEndpointMetricSinkValidationStep(IOptions<ScraperRuntimeConfiguration> runtimeConfiguration)
-            : this(runtimeConfiguration, NullLogger.Instance)
-        {
-        }
-
-        public PrometheusScrapingEndpointMetricSinkValidationStep(IOptions<ScraperRuntimeConfiguration> runtimeConfiguration, ILogger validationLogger)
+        public PrometheusScrapingEndpointMetricSinkValidationStep(IOptions<ScraperRuntimeConfiguration> runtimeConfiguration, ILogger<PrometheusScrapingEndpointMetricSinkValidationStep> validationLogger)
             : base(validationLogger)
         {
             _runtimeConfiguration = runtimeConfiguration;

src/Promitor.Agents.Scraper/Validation/Steps/Sinks/StatsDMetricSinkValidationStep.cs

@@ -1,10 +1,11 @@
 using System.Collections.Generic;
 using System.Linq;
 using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.Logging.Abstractions;
 using Microsoft.Extensions.Options;
+using Promitor.Agents.Core.Validation;
+using Promitor.Agents.Core.Validation.Interfaces;
+using Promitor.Agents.Core.Validation.Steps;
 using Promitor.Agents.Scraper.Configuration;
-using Promitor.Agents.Scraper.Validation.Interfaces;
 
 namespace Promitor.Agents.Scraper.Validation.Steps.Sinks
 {
@@ -13,12 +14,7 @@ public class StatsDMetricSinkValidationStep : ValidationStep,
     {
         private readonly IOptions<ScraperRuntimeConfiguration> _runtimeConfiguration;
 
-        public StatsDMetricSinkValidationStep(IOptions<ScraperRuntimeConfiguration> runtimeConfiguration)
-            : this(runtimeConfiguration, NullLogger.Instance)
-        {
-        }
-
-        public StatsDMetricSinkValidationStep(IOptions<ScraperRuntimeConfiguration> runtimeConfiguration, ILogger validationLogger)
+        public StatsDMetricSinkValidationStep(IOptions<ScraperRuntimeConfiguration> runtimeConfiguration, ILogger<StatsDMetricSinkValidationStep> validationLogger)
             : base(validationLogger)
         {
             _runtimeConfiguration = runtimeConfiguration;