寻找做网站,万户高端网站建设,如何用手机免费开网店,网站定制开发要多久上一篇博文中说到Prometheus有四种指标类型#xff1a;Counter#xff08;计数器#xff09;、Gauge#xff08;仪表盘#xff09;、Histogram#xff08;直方图#xff09;、Summary#xff08;摘要#xff09;#xff0c;并且我们做了一个Counter的Demo#xff0c… 上一篇博文中说到Prometheus有四种指标类型Counter计数器、Gauge仪表盘、Histogram直方图、Summary摘要并且我们做了一个Counter的Demo接下来看看Histogram。3、Summary摘要summary是采集展示百分位数百分位定义在一组由小到大的数字中某个数字大于90%的数字这个数字就是第90个的百分位数。通过demo的来理解一下吧假如我们业务需求是要知道订单金额1030507090的百分位数该怎么实现呢需要在MetricsHub.cs中添加Summary类型的指标收集集合using Prometheus;
using System.Collections.Generic;namespace PrometheusSample.Middlewares
{public class MetricsHub{private static Dictionarystring, Counter _counterDictionary new Dictionarystring, Counter();private static Dictionarystring, Dictionarystring, Gauge _gaugeDictionary new Dictionarystring, Dictionarystring, Gauge();private static Dictionarystring, Summary _summaryDictionary new Dictionarystring, Summary();private static Dictionarystring, Histogram _histogramDictionary new Dictionarystring, Histogram();public Counter GetCounter(string key){if (_counterDictionary.ContainsKey(key)){return _counterDictionary[key];}else{return null;}}public Dictionarystring, Gauge GetGauge(string key){if (_gaugeDictionary.ContainsKey(key)){return _gaugeDictionary[key];}else{return null;}}public Summary GetSummary(string key){if (_summaryDictionary.ContainsKey(key)){return _summaryDictionary[key];}else{return null;}}public Histogram GetHistogram(string key){if (_histogramDictionary.ContainsKey(key)){return _histogramDictionary[key];}else{return null;}}public void AddCounter(string key, Counter counter){_counterDictionary.Add(key, counter);}public void AddGauge(string key, Dictionarystring, Gauge gauges){_gaugeDictionary.Add(key, gauges);}public void AddSummary(string key, Summary summary){_summaryDictionary.Add(key, summary);}public void AddHistogram(string key, Histogram histogram){_histogramDictionary.Add(key, histogram);}}
}
接下来就要在BusinessMetricsMiddleware的中间件中添加处理Summary指标的代码了using Microsoft.AspNetCore.Http;
using PrometheusSample.Models;
using System.IO;
using System.Threading.Tasks;namespace PrometheusSample.Middlewares
{/// summary/// 请求记录中间件/// /summarypublic class BusinessMetricsMiddleware{private readonly RequestDelegate _next;public BusinessMetricsMiddleware(RequestDelegate next){_next next;}public async Task InvokeAsync(HttpContext context, MetricsHub metricsHub){var originalBody context.Response.Body;try{using (var memStream new MemoryStream()){//从管理返回的Response中取出返回数据根据返回值进行监控指标计数context.Response.Body memStream;await _next(context);memStream.Position 0;string responseBody new StreamReader(memStream).ReadToEnd();memStream.Position 0;await memStream.CopyToAsync(originalBody);if (metricsHub.GetCounter(context.Request.Path) ! null || metricsHub.GetGauge(context.Request.Path) ! null){//这里约定所有action返回值是一个APIResult类型var result System.Text.Json.JsonSerializer.DeserializeAPIResult(responseBody, new System.Text.Json.JsonSerializerOptions { PropertyNameCaseInsensitive true });if (result ! null result.Result){//获取到Countervar counter metricsHub.GetCounter(context.Request.Path);if (counter ! null){//计数counter.Inc();}var gauges metricsHub.GetGauge(context.Request.Path);if (gauges ! null){//存在增加指标就Incif (gauges.ContainsKey()){gauges[].Inc();} //存在减少指标-就Decif (gauges.ContainsKey(-)){gauges[-].Dec();}}var histogram metricsHub.GetHistogram(context.Request.Path);if (histogram ! null){var parseResult int.TryParse(result.Data.ToString(), out int i);if (parseResult){histogram.Observe(i);}}var summary metricsHub.GetSummary(context.Request.Path);if (summary ! null){var parseResult int.TryParse(result.Data.ToString(), out int i);if (parseResult){summary.Observe(i);}} }}}}finally{context.Response.Body originalBody;}}}
}
再就是在Starsup中配置对应url的Summary参数了using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.OpenApi.Models;
using Prometheus;
using PrometheusSample.Middlewares;
using PrometheusSample.Services;
using System.Collections.Generic;namespace PrometheusSample
{public class Startup{public Startup(IConfiguration configuration){Configuration configuration;}public IConfiguration Configuration { get; }public void ConfigureServices(IServiceCollection services){MetricsHandle(services);services.AddScopedIOrderService, OrderService();services.AddControllers();services.AddSwaggerGen(c {c.SwaggerDoc(v1, new OpenApiInfo { Title PrometheusSample, Version v1 });});}public void Configure(IApplicationBuilder app, IWebHostEnvironment env){if (env.IsDevelopment()){app.UseDeveloperExceptionPage();app.UseSwagger();app.UseSwaggerUI(c c.SwaggerEndpoint(/swagger/v1/swagger.json, PrometheusSample v1));}app.UseRouting();//http请求的中间件app.UseHttpMetrics();app.UseAuthorization();//自定义业务跟踪app.UseBusinessMetrics();app.UseEndpoints(endpoints {//映射监控地址为 /metricsendpoints.MapMetrics();endpoints.MapControllers();});}/// summary/// 处理监控事项/// /summary/// param nameservices/paramvoid MetricsHandle(IServiceCollection services){var metricsHub new MetricsHub();//countermetricsHub.AddCounter(/register, Metrics.CreateCounter(business_register_user, 注册用户数。));metricsHub.AddCounter(/order, Metrics.CreateCounter(business_order_total, 下单总数。));metricsHub.AddCounter(/pay, Metrics.CreateCounter(business_pay_total, 支付总数。));metricsHub.AddCounter(/ship, Metrics.CreateCounter(business_ship_total, 发货总数。));//gaugevar orderGauge Metrics.CreateGauge(business_order_count, 当前下单数量。);var payGauge Metrics.CreateGauge(business_pay_count, 当前支付数量。);var shipGauge Metrics.CreateGauge(business_ship_count, 当前发货数据。);metricsHub.AddGauge(/order, new Dictionarystring, Gauge {{ , orderGauge}});metricsHub.AddGauge(/pay, new Dictionarystring, Gauge {{-,orderGauge},{,payGauge}});metricsHub.AddGauge(/ship, new Dictionarystring, Gauge {{,shipGauge},{-,payGauge}});//histogram var orderHistogram Metrics.CreateHistogram(business_order_histogram, 订单直方图。,new HistogramConfiguration{Buckets Histogram.LinearBuckets(start: 1000, width: 1000, count: 6)}) ; metricsHub.AddHistogram(/order, orderHistogram);//summary var orderSummary Metrics.CreateSummary(business_order_summary, 10分钟内的订单数量,new SummaryConfiguration{Objectives new[]{new QuantileEpsilonPair(0.1, 0.05), new QuantileEpsilonPair(0.3, 0.05), new QuantileEpsilonPair(0.5, 0.05),new QuantileEpsilonPair(0.7, 0.05), new QuantileEpsilonPair(0.9, 0.05),}});metricsHub.AddSummary(/order, orderSummary);services.AddSingleton(metricsHub);}}
}
其实 new QuantileEpsilonPair(0.1, 0.05) 第一个参数是百分位0.05是误差范围是10%-5%10%5%。最后一步就是打开Grafana来配置展示图表了。最终展示结果同时事例中给出了最大、最少、平均、汇总、当前值以供参考。
