配置healthchecks ui
https://localhost:44398/healthchecks-ui#/healthchecks
context.Services.AddHealthChecks()
.AddSqlServer(configuration["ConnectionStrings:Default"])
.AddMongoDb(configuration["ConnectionStrings:TestMongoDb"])
.AddCheck<MemoryHealthCheck>("MemoryHealthCheck")
.AddCheck<ApiHealthCheck>("ApiHealthCheck")
.AddCheck<WindowsServicesHealthCheck>("RpcSs");
context.Services.AddHealthChecksUI();//.AddInMemoryStorage();
// setupSettings: setup =>
//{
// setup.SetEvaluationTimeInSeconds(60); //Configures the UI to poll for healthchecks updates every 5 seconds
//});
app.UseHealthChecks("/health", new HealthCheckOptions()
{
Predicate = _ => true,
ResponseWriter = UIResponseWriter.WriteHealthCheckUIResponse
});
app.UseHealthChecksUI()
ApiHealthCheck
public class ApiHealthCheck : IHealthCheck { private readonly IHttpClientFactory _httpClientFactory; public ApiHealthCheck(IHttpClientFactory httpClientFactory) { _httpClientFactory = httpClientFactory; } public async Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context, CancellationToken cancellationToken = default) { using (var httpClient = _httpClientFactory.CreateClient()) { var response = await httpClient.GetAsync("https://localhost:44398/api/app/item/items"); if (response.IsSuccessStatusCode) { return HealthCheckResult.Healthy($"API is running."); } return HealthCheckResult.Unhealthy("API is not running"); } } }
MemoryHealthCheck
#region snippet1
public class MemoryHealthCheck : IHealthCheck
{
private readonly IOptionsMonitor<MemoryCheckOptions> _options;
public MemoryHealthCheck(IOptionsMonitor<MemoryCheckOptions> options)
{
_options = options;
}
public string Name => "memory_check";
public Task<HealthCheckResult> CheckHealthAsync(
HealthCheckContext context,
CancellationToken cancellationToken = default(CancellationToken))
{
var options = _options.Get(context.Registration.Name);
// Include GC information in the reported diagnostics.
var allocated = GC.GetTotalMemory(forceFullCollection: false);
var data = new Dictionary<string, object>()
{
{ "AllocatedBytes", allocated },
{ "Gen0Collections", GC.CollectionCount(0) },
{ "Gen1Collections", GC.CollectionCount(1) },
{ "Gen2Collections", GC.CollectionCount(2) },
};
var status = (allocated < options.Threshold) ?
HealthStatus.Healthy : HealthStatus.Unhealthy;
return Task.FromResult(new HealthCheckResult(
status,
description: "Reports degraded status if allocated bytes " +
$">= {options.Threshold} bytes.",
exception: null,
data: data));
}
}
#endregion
#region snippet2
public static class GCInfoHealthCheckBuilderExtensions
{
public static IHealthChecksBuilder AddMemoryHealthCheck(
this IHealthChecksBuilder builder,
string name,
HealthStatus? failureStatus = null,
IEnumerable<string> tags = null,
long? thresholdInBytes = null)
{
// Register a check of type GCInfo.
builder.AddCheck<MemoryHealthCheck>(
name, failureStatus ?? HealthStatus.Degraded, tags);
// Configure named options to pass the threshold into the check.
if (thresholdInBytes.HasValue)
{
builder.Services.Configure<MemoryCheckOptions>(name, options =>
{
options.Threshold = thresholdInBytes.Value;
});
}
return builder;
}
}
#endregion
#region snippet3
public class MemoryCheckOptions
{
// Failure threshold (in bytes)
public long Threshold { get; set; } = 1024L * 1024L * 1024L;
}
#endregion
WindowsServicesHealthCheck
public class WindowsServicesHealthCheck : IHealthCheck { private readonly string _serviceName; private readonly IOptionsMonitor<WindowsServicesCheckOptions> _options; public WindowsServicesHealthCheck(IOptionsMonitor<WindowsServicesCheckOptions> options) { _options = options; } public Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context, CancellationToken cancellationToken = default) { var status = GetWindowsServiceStatus(context.Registration.Name); return Task.FromResult(new HealthCheckResult( (status == ServiceControllerStatus.Running)?HealthStatus.Healthy : HealthStatus.Unhealthy, description: "", exception: null, data: null)); } public static ServiceControllerStatus GetWindowsServiceStatus(String SERVICENAME) { ServiceController sc = new ServiceController(SERVICENAME); return sc.Status; //switch (sc.Status) //{ // case ServiceControllerStatus.Running: // return "Running"; // case ServiceControllerStatus.Stopped: // return "Stopped"; // case ServiceControllerStatus.Paused: // return "Paused"; // case ServiceControllerStatus.StopPending: // return "Stopping"; // case ServiceControllerStatus.StartPending: // return "Starting"; // default: // return "Status Changing"; //} } public class WindowsServicesCheckOptions { public string Name { get; set; } } }