netcore 项目健康检查（healthcheck）

一、netcore healthcheck

1. 创建项目

   $  dotnet new web -n Apricot.HealthCheck.WebApi
   

2. 安装依赖

   $ dotnet add package AspNetCore.HealthChecks.UI --version 9.0.0
   $ dotnet add package AspNetCore.HealthChecks.UI.Client --version 9.0.0
   $ dotnet add package AspNetCore.HealthChecks.UI.InMemory.Storage --version 9.0.0
   $ dotnet add package AspNetCore.HealthChecks.Uris --version 9.0.0
   $ dotnet add package AspNetCore.HealthChecks.Uris --version 9.0.0
   $ dotnet add package AspNetCore.HealthChecks.MySql --version 9.0.0
   

3. 服务注入

   var builder = WebApplication.CreateBuilder(args);
   
   // health check
   builder.Services.AddHealthChecks()
    // mysql 检查
    .AddMySql(
                connectionString: AppSettings.ConnectionStrings.Default.Decrypt(),
                name: "mysql",
                tags: new[] { "db", "mysql" }
                )
     // url 检查
    .AddUrlGroup(new Uri("https://www.baidu.com/"),"baidu")
    // 自检
    .AddCheck("webapi", () => Microsoft.Extensions.Diagnostics.HealthChecks.HealthCheckResult.Healthy());
   
    // health check ui
    builder.Services.AddHealthChecksUI(setupSettings: setup =>
    {
        // linux 使用（urls:"http://*:5000"）配置，需要使用注释部分，不然出现错误（unspecified addresses that cannot be used as a target address）
        setup.AddHealthCheckEndpoint("Apricot.WebApi", "/healthz");//"http://localhost:5000/healthz");
    })
    .AddInMemoryStorage();
   

4. 管道配置

   var app = builder.Build();
   
   // health check 
   app.UseHealthChecks("/healthz", new Microsoft.AspNetCore.Diagnostics.HealthChecks.HealthCheckOptions
   {
       Predicate = _ => true,
       ResponseWriter = UIResponseWriter.WriteHealthCheckUIResponse
   });
   
   // health check ui
   app.UseHealthCheckUI();
   

5. 效果图
   

二、