向 .NET 隔离的 Azure 函数添加运行状况检查

Question

我找不到任何资源来将运行状况检查添加到在 .NET 5.0 隔离中运行的 HTTPTrigger 功能应用程序。

static async Task Main()
{
    var host = new HostBuilder()
        .ConfigureAppConfiguration(configurationBuilder =>
        {
            configurationBuilder.AddEnvironmentVariables();
        })
        .ConfigureFunctionsWorkerDefaults()
        .ConfigureServices((builder, services) =>
        {
            var configuration = builder.Configuration;
            services.AddDbContext(configuration);
                    
            // Add healthcheck here
            services.AddHealthChecks()
            // ...
            // Map health checks
                    
        })
        .Build();

    await host.RunAsync();
}

本指南指出我可以添加 MapHealthChecks （但在 asp.net core 中）

var app = builder.Build();

app.MapHealthChecks("/healthz");

app.Run();

如何将其转换为在我的 dotnet 隔离应用程序中运行？

Answer 1

app.MapHealthChecks("/healthz");

上面的代码创建了 ASP CORE中间件并注入IHealthCheckService以调用CheckHealthAsync()并返回 HTTP 响应。在 Azure 函数中，您可以：

• 注入IHealthCheckService构造函数，调用CheckHealthAsync()并返回响应。

    private readonly IHealthCheckService _healthCheck;
  
    public DependencyInjectionFunction(IHealthCheckService healthCheck)
    {
        _healthCheck = healthCheck;
    }
  
    [Function(nameof(DependencyInjectionFunction))]
    public async Task<HttpResponseData> Run([HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)] HttpRequestData req,
        FunctionContext context)
    {
         var healthStatus = await _healthCheck.CheckHealthAsync();
         #format health status and return HttpResponseData
    }
  

• 实现您自己的azure函数中间件，检查路径'/healthz，然后IHealthCheckService立即解析并返回健康状态