public static IHealthChecksBuilder AddSelfCheck(this IHealthChecksBuilder builder, string name, HealthStatus?failureStatus = null, IEnumerable <string> tags = null)
{
// Register a check of type SelfHealthCheck
builder.AddCheck <SelfHealthCheck>(name, failureStatus ?? HealthStatus.Degraded, tags);
return(builder);
}
private static IHealthChecksBuilder AddQuartzHealthCheck(
this IHealthChecksBuilder builder,
string suffix,
IHealthCheck healthCheck)
{
return(builder.AddCheck($"quartz-{suffix}", healthCheck));
}
private static IHealthChecksBuilder AddQuartzHealthCheck(
this IHealthChecksBuilder builder,
string suffix,
IHealthCheck healthCheck)
{
return(builder.AddCheck($"quartz-{suffix}", healthCheck, HealthStatus.Unhealthy, new[] { "ready" }));
}
/// <summary>
/// Adds Azure Storage Health Check.
/// </summary>
/// <param name="builder"></param>
/// <param name="name"></param>
/// <param name="containerName"></param>
/// <param name="setup"></param>
/// <param name="failureStatus"></param>
/// <param name="tags"></param>
/// <returns></returns>
public static IHealthChecksBuilder AddAzureBlobStorageCheck(
this IHealthChecksBuilder builder,
string name,
string containerName,
Action <StorageAccountOptions> setup,
HealthStatus?failureStatus = default,
IEnumerable <string> tags = default)
{
var options = new StorageAccountOptions();
setup?.Invoke(options);
builder.Services.AddOptions <StorageAccountOptions>(name)
.Configure((opt) =>
{
opt.ConnectionString = options.ConnectionString;
opt.ContainerName = containerName;
opt.Name = options.Name;
opt.Token = options.Token;
});
builder.AddCheck <AzureBlobStorageHealthCheck>(name, failureStatus ?? HealthStatus.Degraded, tags);
return(builder);
}
public static IHealthChecksBuilder AddAutoNamedCheck <T>(this IHealthChecksBuilder builder, params string[] tags) where T : class, IHealthCheck
{
var checkType = typeof(T);
string name = checkType.Name;
if (checkType.IsConstructedGenericType && checkType.GenericTypeArguments.Length == 1)
{
name = checkType.GenericTypeArguments[0].Name;
}
if (name.EndsWith("HealthCheck", StringComparison.OrdinalIgnoreCase))
{
name = name.Substring(0, name.Length - 11);
}
if (name.EndsWith("Check", StringComparison.OrdinalIgnoreCase))
{
name = name.Substring(0, name.Length - 5);
}
if (name.EndsWith("Job", StringComparison.OrdinalIgnoreCase))
{
name = name.Substring(0, name.Length - 3);
}
var allTags = new List <string>(tags)
{
name
};
return(builder.AddCheck <T>(name, null, allTags));
}
public static IHealthChecksBuilder AddSelfCheck(this IHealthChecksBuilder builder, string name, HealthStatus?failureStatus = null, IEnumerable <string> tags = null)
{
builder.AddCheck <SelfHealthCheck>(name, failureStatus ?? HealthStatus.Degraded, tags);
builder.AddDbContextCheck <CompraContext>();
return(builder);
}
/// <summary>
/// Adds a health check to see whether the specified subscription exists for the specified topic, and optionally, checking configuration details.
/// </summary>
/// <param name="builder">The ASP.Net Core health check builder.</param>
/// <param name="topicName">The topic to be checked.</param>
/// <param name="subscriptionName">The subscription to be checked.</param>
/// <param name="requiredConfiguration">Setup for the options specific to this topic & subscription.</param>
public static IHealthChecksBuilder AddAzureServiceBusSubscriptionCheck(this IHealthChecksBuilder builder, string topicName, string subscriptionName, Action <SubscriptionHealthCheckOptions> requiredConfiguration = null)
{
if (builder == null)
{
throw new ArgumentNullException(nameof(builder));
}
if (string.IsNullOrWhiteSpace(topicName))
{
throw new ArgumentNullException(nameof(topicName));
}
if (string.IsNullOrWhiteSpace(subscriptionName))
{
throw new ArgumentNullException(nameof(subscriptionName));
}
var topicSubscriptionName = $"{topicName}/{subscriptionName}";
builder.Services.AddAzureServiceBusDefaultServices().Configure <SubscriptionHealthCheckOptions>(topicSubscriptionName, config =>
{
config.TopicName = topicName;
config.SubscriptionName = subscriptionName;
requiredConfiguration?.Invoke(config);
});
return(builder.AddCheck <SubscriptionHealthCheck>(topicSubscriptionName));
}
/// <summary>
/// Adds a health check for the specified <see cref="DbContext"/> type.
/// </summary>
/// <typeparam name="TContext">The <see cref="DbContext"/> type.</typeparam>
/// <param name="builder">The <see cref="IHealthChecksBuilder"/>.</param>
/// <param name="name">
/// The health check name. Optional. If <c>null</c> the type name of <typeparamref name="TContext"/> will be used for the name.
/// </param>
/// <param name="failureStatus">
/// The <see cref="HealthStatus"/> that should be reported when the health check fails. Optional. If <c>null</c> then
/// the default status of <see cref="HealthStatus.Unhealthy"/> will be reported.
/// </param>
/// <param name="tags">A list of tags that can be used to filter sets of health checks. Optional.</param>
/// <param name="customTestQuery">
/// A custom test query that will be executed when the health check executes to test the health of the database
/// connection and configurations.
/// </param>
/// <returns>The <see cref="IHealthChecksBuilder"/>.</returns>
/// <remarks>
/// <para>
/// The health check implementation added by this method will use the dependency injection container
/// to create an instance of <typeparamref name="TContext"/>.
/// </para>
/// <para>
/// By default the health check implementation will use the <see cref="DatabaseFacade.CanConnectAsync(CancellationToken)"/> method
/// to test connectivity to the database. This method requires that the database provider has correctly implemented the
/// <see cref="IDatabaseCreatorWithCanConnect" /> interface. If the database provide has not implemented this interface
/// then the health check will report a failure.
/// </para>
/// <para>
/// Providing a <paramref name="customTestQuery" /> will replace the use of <see cref="DatabaseFacade.CanConnectAsync(CancellationToken)"/>
/// to test database connectivity. An implementation of a test query should handle exceptions that can arise due to connectivity failure,
/// and should return a pass/fail result. The test query should be be designed to complete in a short and predicatable amount of time.
/// </para>
/// </remarks>
public static IHealthChecksBuilder AddDbContextCheck <TContext>(
this IHealthChecksBuilder builder,
string name = null,
HealthStatus?failureStatus = default,
IEnumerable <string> tags = default,
Func <TContext, CancellationToken, Task <bool> > customTestQuery = default)
where TContext : DbContext
{
if (builder == null)
{
throw new ArgumentNullException(nameof(builder));
}
if (name == null)
{
name = typeof(TContext).Name;
}
if (customTestQuery != null)
{
builder.Services.Configure <DbContextHealthCheckOptions <TContext> >(name, options => options.CustomTestQuery = customTestQuery);
}
return(builder.AddCheck <DbContextHealthCheck <TContext> >(name, failureStatus, tags));
}
/// <summary>
/// Add Machine Learning Health Check for ML.NET model.
/// </summary>
/// <typeparam name="TInput"></typeparam>
/// <typeparam name="TPrediction"></typeparam>
/// <param name="builder"></param>
/// <param name="name"></param>
/// <param name="configure"></param>
/// <param name="failureStatus"></param>
/// <param name="tags"></param>
/// <returns></returns>
public static IHealthChecksBuilder AddMachineLearningModelCheck <TInput, TPrediction>(
this IHealthChecksBuilder builder,
string name,
Action <MachineLearningHealthCheckOptions <TInput> >?configure = null,
HealthStatus?failureStatus = default,
IEnumerable <string>?tags = default)
where TInput : class, new()
where TPrediction : class, new()
{
if (tags == default)
{
tags = new[] { "machine_learning" };
}
builder.AddCheck <MachineLearningHealthCheck <TInput, TPrediction> >(name, failureStatus ?? HealthStatus.Unhealthy, tags);
// Configure named options to pass the threshold into the check.
builder.Services.Configure <MachineLearningHealthCheckOptions <TInput> >(
name,
options =>
{
configure?.Invoke(options);
});
return(builder);
}
public static IHealthChecksBuilder AddPerformanceCounter(this IHealthChecksBuilder builder, String WMIClassName, params string[] columns)
{
string columnsJoined = string.Join(", ", columns);
builder.AddCheck($"PerformanceCounter for " + WMIClassName + " Columns " + columnsJoined, () =>
{
try
{
IDictionary <string, Object> data = RunQueryforData("SELECT " + columnsJoined + " FROM " + WMIClassName);
data.Add("type", "PerformanceCounter");
data.Add("wmiClassName", WMIClassName);
data.Add("column", columnsJoined);
ReadOnlyDictionary <string, Object> rodata = new ReadOnlyDictionary <string, object>(data);
string description = $"PerformanceCounter for " + WMIClassName + " Columns " + columnsJoined;
return(HealthCheckResult.Healthy(description, rodata));
}
catch (PlatformNotSupportedException ex)
{
return(HealthCheckResult.Degraded(ex.Message, ex, new Dictionary <string, object> {
{ "type", "PerformanceCounter" }, { "wmiClassName", WMIClassName }, { "column", columnsJoined }
}));
}
catch (Exception ex)
{
return(HealthCheckResult.Unhealthy(ex.Message, ex, new Dictionary <string, object> {
{ "type", "PerformanceCounter" }, { "wmiClassName", WMIClassName }, { "column", columnsJoined }
}));
}
});
return(builder);
}
public static IHealthChecksBuilder AddPerformanceCounter(this IHealthChecksBuilder builder, String WMIClassName, string Column)
{
builder.AddCheck($"PerformanceCounter for " + WMIClassName + " Column " + Column, () =>
{
try
{
IDictionary <string, Object> data = RunQueryforData("SELECT " + Column + " FROM " + WMIClassName); ////Win32_PerfRawData_PerfOS_Memory
data.Add("type", "PerformanceCounter");
data.Add("wmiClassName", WMIClassName);
data.Add("column", Column);
ReadOnlyDictionary <string, Object> rodata = new ReadOnlyDictionary <string, object>(data);
string description = "PerformanceCounter for " + WMIClassName + " Column " + Column;
return(HealthCheckResult.Healthy(description, rodata));
}
catch (PlatformNotSupportedException ex)
{
return(HealthCheckResult.Degraded(ex.Message, ex, new Dictionary <string, object> {
{ "type", "PerformanceCounter" }, { "wmiClassName", WMIClassName }, { "column", Column }
}));
}
catch (Exception ex)
{
return(HealthCheckResult.Unhealthy(ex.Message, ex, new Dictionary <string, object> {
{ "type", "PerformanceCounter" }, { "wmiClassName", WMIClassName }, { "column", Column }
}));
}
});
return(builder);
}
public static IHealthChecksBuilder AddOurChecks(this IHealthChecksBuilder healthChecksBuilder)
{
healthChecksBuilder
.AddCheck("assembly", () => HealthCheckResult.Healthy())
.AddCheck <VaultHealthCheck>("Vault");
return(healthChecksBuilder);
}
public static IHealthChecksBuilder AddFileWritePermissionsCheck(this IHealthChecksBuilder builder, string folderToTest)
{
var check = new VerifyWritePermissionsHealthCheck(folderToTest);
builder.AddCheck("Check folder write permissions", check);
return(builder);
}
public static IHealthChecksBuilder AddBlobStorageHealthChecks(this IHealthChecksBuilder builder)
{
if (!builder.Services.Any(x => x.ServiceType == typeof(IBlobStorageFactory)))
{
throw new InvalidOperationException("You must register an implementation for IBlobStorageFactory before calling AddBlobStorageHealthChecks"); //we don't want to register one here because we don't know what implementation they might want to use
}
builder.AddCheck <BlobStorageHealthCheck>("BlobStorage");
return(builder);
}
public static IHealthChecksBuilder AddLivenessHealthCheck(
this IHealthChecksBuilder builder,
string name,
HealthStatus?failureStatus,
IEnumerable <string> tags) =>
builder.AddCheck <LivenessHealthCheck>(
name,
failureStatus,
tags);
public static IHealthChecksBuilder AddGenericHealthCheck <T>(
this IHealthChecksBuilder builder,
string name,
HealthStatus?failureStatus = null,
IEnumerable <string> tags = null) where T : class, IHealthCheck
{
builder.AddCheck <T>(name, failureStatus ?? HealthStatus.Degraded, tags);
return(builder);
}
/// <summary>
/// Add SIGTERM Healcheck that provides notification for orchestrator with unhealthy status once the application begins to shut down.
/// </summary>
/// <param name="builder">The <see cref="IHealthChecksBuilder"/>.</param>
/// <param name="name">The name of the HealthCheck.</param>
/// <param name="failureStatus">The <see cref="HealthStatus"/>The type should be reported when the health check fails. Optional. If <see langword="null"/> then.</param>
/// <param name="tags">A list of tags that can be used to filter sets of health checks. Optional.</param>
/// <returns></returns>
public static IHealthChecksBuilder AddSigtermCheck(
this IHealthChecksBuilder builder,
string name,
HealthStatus?failureStatus = null,
IEnumerable <string>?tags = default)
{
builder.AddCheck <SigtermHealthCheck>(name, failureStatus, tags);
return(builder);
}
public static IHealthChecksBuilder AddMPassSamlHealthCheck(this IHealthChecksBuilder builder, string name, HealthStatus?failureStatus = default, IEnumerable <string> tags = default)
{
if (String.IsNullOrWhiteSpace(name))
{
throw new ArgumentException("Please provide a configuration name, such as MPassSamlDefaults.AuthenticationScheme", nameof(name));
}
builder.Services.TryAddSingleton <MPassSamlHealthCheck>();
return(builder.AddCheck <MPassSamlHealthCheck>(name, failureStatus, tags));
}
public static IHealthChecksBuilder AddBrokerCheck(
this IHealthChecksBuilder builder,
string name,
HealthStatus?failureStatus = null,
IEnumerable <string> tags = null,
long?thresholdInBytes = null)
{
builder.AddCheck <BrokerHealthCheck>(name, failureStatus ?? HealthStatus.Degraded, tags);
return(builder);
}
public static IHealthChecksBuilder AddReadinessHealthCheck(
this IHealthChecksBuilder builder,
string name,
HealthStatus?failureStatus,
IEnumerable <string> tags)
{
return(builder.AddCheck <ReadinessHealthCheck>(
name,
failureStatus,
tags));
}
public static IHealthChecksBuilder AddAzureServiceBusTopicHealthCheck(this IHealthChecksBuilder builder,
string connectionString,
string topicName,
string name = default,
HealthStatus failureStatus = HealthStatus.Degraded,
IEnumerable <string> tags = default,
TimeSpan?timeout = default)
{
return(builder.AddCheck(name ?? $"Azure Service Bus: {topicName}",
new AzureServiceBusHealthCheck(connectionString, topicName), failureStatus, tags, timeout));
}
public static IHealthChecksBuilder AddGCInfoCheck(this IHealthChecksBuilder builder, string name, HealthStatus?failureStatus = null, IEnumerable <string> tags = null, long?thresholdInBytes = null)
{
builder.AddCheck <GCInfoHealthCheck>(name, failureStatus ?? HealthStatus.Degraded, tags);
if (thresholdInBytes.HasValue)
{
builder.Services.Configure <GCInfoOptions>(name, options => options.Threshold = thresholdInBytes.Value);
}
return(builder);
}
/// <summary>
/// Adds the Orleans HealthCheck with the Ready Tag.
/// </summary>
/// <param name="healthChecksBuilder">The <see cref="IHealthChecksBuilder" />.</param>
/// <returns>The <see cref="IHealthChecksBuilder" />.</returns>
public static IHealthChecksBuilder AddOrleansHealthCheck([NotNull] this IHealthChecksBuilder healthChecksBuilder)
{
if (healthChecksBuilder == null)
{
throw new ArgumentNullException(nameof(healthChecksBuilder));
}
return(healthChecksBuilder.AddCheck <OrleansHealthCheck>(HealthCheckName, HealthStatus.Unhealthy,
new List <string> {
Constants.ReadyTag
}));
}
public static IHealthChecksBuilder AddDateTimeHealthCheck(this IHealthChecksBuilder builder, string ntpserver, double toleratesec = 10, string name = "Date and time health check")
{
return(builder.AddCheck(name, () =>
{
HealthCheckResult result;
try
{
var dtx = new List <(int Id, DateTime webtime, DateTime locdateTime)>();
for (int i = 0; i < 3; i++)
{
var webtime1 = getWebTime(ntpserver);
dtx.Add((i, webtime1, DateTime.Now));
}
/// <summary>
/// Registers a check that validates that all Entity Framework migrations declared by the given context were executed on the server the app is connected to
/// If any migration is missing, it will report it in the data dictionary
/// </summary>
/// <typeparam name="TContext"></typeparam>
/// <param name="builder"></param>
/// <param name="checkName"></param>
/// <returns></returns>
public static IHealthChecksBuilder AddEntityFrameworkMigrationsCheck <TContext>(this IHealthChecksBuilder builder, string checkName = null)
where TContext : DbContext
{
// PendingMigrationsCheckerStorage is registered as a singleton, to provide persistent memory and remember whether last check was successful or not
builder.Services.TryAddSingleton <IEntityFrameworkPendingMigrationsCheckerStorage <TContext>, EntityFrameworkPendingMigrationsCheckerStorage <TContext> >();
// the scope created here will be disposed by the parent scope
// todo fix when issue is resolved https://github.com/dotnet/aspnetcore/issues/14453
builder.Services.TryAddScoped <IEntityFrameworkPendingMigrationsChecker <TContext> >(provider => new EntityFrameworkPendingMigrationsChecker <TContext>(provider.CreateScope().ServiceProvider.GetRequiredService <TContext>()));
builder.AddCheck <EntityFrameworkMigrationsHealthCheck <TContext> >(checkName ?? $"{typeof(TContext).Name}MigrationsHealthCheck");
return(builder);
}
public static IHealthChecksBuilder AddMemoryHealthCheck(this IHealthChecksBuilder builder, string name, HealthStatus?failureStatus = null, IEnumerable <string> tags = null, long?thresholdInBytes = null)
{
builder.AddCheck <MemoryHealthCheck>(name, failureStatus ?? HealthStatus.Degraded, tags ?? new string[0]);
if (thresholdInBytes.HasValue)
{
builder.Services.Configure <MemoryCheckOptions>(opts =>
{
opts.Threshold = thresholdInBytes.Value;
});
}
return(builder);
}
/// <summary>
/// Adds a new HealthCheck with the specified name and implementation.
/// Adds the Live Tag to the HealthCheck automatically.
/// </summary>
/// <typeparam name="T">The HealthCheck type.</typeparam>
/// <param name="builder">The <see cref="IHealthChecksBuilder" />.</param>
/// <param name="name">The HealthCheck name.</param>
/// <param name="healthStatus">The <see cref="HealthStatus" /> that should be
/// reported when the HealthCheck reports a failure. If the provided value is null,
/// then <see cref="HealthStatus.Unhealthy" /> will
/// be reported.
///</param>
/// <returns>The <see cref="IHealthChecksBuilder" />.</returns>
public static IHealthChecksBuilder AddLiveCheck <T>([NotNull] this IHealthChecksBuilder builder,
[NotNull] string name, HealthStatus?healthStatus = null) where T : class, IHealthCheck
{
if (builder == null)
{
throw new ArgumentNullException(nameof(builder));
}
if (string.IsNullOrWhiteSpace(name))
{
throw new ArgumentException($"'{nameof(name)}' must not be null, empty or whitespace.", nameof(name));
}
return(builder.AddCheck <T>(name, healthStatus, new[] { Constants.LiveTag }));
}
public MetricsBuilder RegisterAsHealthCheck <TMetric, TValue>(Func <IMetricsHost, TMetric> builderFunc,
Func <TMetric, TValue> valueFunc, Func <TValue, bool> checkFunc,
HealthStatus onCheckFailure = HealthStatus.Unhealthy) where TMetric : IMetric
{
// FIXME: throwaway host to resolve the name, which we need in advance for registration
var name = builderFunc(new MetricsHost(new MemoryMetricsStore())).Name.Name;
Services.AddSingleton(r => new MetricHealthCheck <TMetric, TValue>(name,
r.GetRequiredService <IMetricsHost>(), builderFunc, valueFunc, checkFunc, onCheckFailure));
_builder.Add(new HealthCheckRegistration(name,
r => r.GetRequiredService <MetricHealthCheck <TMetric, TValue> >(), onCheckFailure, null, null));
_builder.AddCheck <MetricHealthCheck <TMetric, TValue> >($"health_check.{name}");
return(this);
}
/// <summary>
/// Add health check for integration with Promitor Resource Discovery
/// </summary>
/// <param name="healthChecksBuilder">Builder for adding health checks</param>
/// <param name="configuration">Configuration of Promitor</param>
/// <returns></returns>
public static IHealthChecksBuilder AddResourceDiscoveryHealthCheck(this IHealthChecksBuilder healthChecksBuilder, IConfiguration configuration)
{
Guard.NotNull(healthChecksBuilder, nameof(healthChecksBuilder));
Guard.NotNull(configuration, nameof(configuration));
var resourceDiscoveryConfiguration = configuration.GetSection("resourceDiscovery").Get <ResourceDiscoveryConfiguration>();
if (resourceDiscoveryConfiguration?.IsConfigured == true)
{
healthChecksBuilder.AddCheck <ResourceDiscoveryHealthCheck>("Promitor Resource Discovery", HealthStatus.Degraded);
}
return(healthChecksBuilder);
}
/// <summary>
/// Add Machine Learning Health Check for ML.NET model.
/// </summary>
/// <typeparam name="TInput"></typeparam>
/// <typeparam name="TPrediction"></typeparam>
/// <param name="builder"></param>
/// <param name="name"></param>
/// <param name="failureStatus"></param>
/// <param name="tags"></param>
/// <returns></returns>
public static IHealthChecksBuilder AddMachineLearningModelCheck <TInput, TPrediction>(
this IHealthChecksBuilder builder,
string name,
HealthStatus?failureStatus = default,
IEnumerable <string>?tags = default) where TInput : class, new() where TPrediction : class, new()
{
if (tags == default)
{
tags = new[] { "machine_learning" };
}
builder.AddCheck <MachineLearningHealthCheck <TInput, TPrediction> >(name, failureStatus ?? HealthStatus.Unhealthy, tags);
return(builder);
}