网站建立的优劣势,seo海外运营,网络服务示范区创建情况,成立软件公司文章目录 1. 探针集成实现高可用1.1 LivenessProbe1.2 ReadinessProbe1.3 StartupProbe 2. 健康检查看板2.1 组件包 1. 探针集成实现高可用
LivenessReadinessStartup
1.1 LivenessProbe
判断服务是否存活结束“非存活”状态服务根据重启策略决定是否重启服务
1.2 Readines… 文章目录 1. 探针集成实现高可用1.1 LivenessProbe1.2 ReadinessProbe1.3 StartupProbe 2. 健康检查看板2.1 组件包 1. 探针集成实现高可用
LivenessReadinessStartup
1.1 LivenessProbe
判断服务是否存活结束“非存活”状态服务根据重启策略决定是否重启服务
1.2 ReadinessProbe
判断服务是否“就绪”“就绪”状态的服务可以接收请求非“就绪”状态的服务将会被从流量负载中摘除
1.3 StartupProbe
检测应用程序是否启动成功启动探针执行成功后将不再执行除非应用重启当启动探针检测成功后其它探针才开始工作适合启动较慢的应用配置Kuberbetes 1.16以后的支持
// startup
internal static bool Ready { get; set; } true;
internal static bool Live { get; set; } true;public void ConfigureServices(IServiceCollection services)
{...// 注册健康检查services.AddHealthChecks().AddMySql(Configuration.GetValuestring(Mysql), mysql, tags: new string[] { mysql, live, all })// tags标签分组.AddRabbitMQ(s {var connectionFactory new RabbitMQ.Client.ConnectionFactory();Configuration.GetSection(RabbitMQ).Bind(connectionFactory);return connectionFactory;}, rabbitmq, tags: new string[] { rabbitmq, live, all }).AddCheck(liveChecker, () {return Live ? HealthCheckResult.Healthy() : HealthCheckResult.Unhealthy();}, new string[] { live, all }).AddCheck(readyChecker, () {return Ready ? HealthCheckResult.Healthy() : HealthCheckResult.Unhealthy();}, new string[] { ready, all });
}// public void Configure(IApplicationBuilder app, IWebHostEnvironment env){...app.UseEndpoints(endpoints {endpoints.MapMetrics();endpoints.MapHealthChecks(/live, new HealthCheckOptions { Predicate registration registration.Tags.Contains(live) });// 检查标记了live的检查项endpoints.MapHealthChecks(/ready, new HealthCheckOptions { Predicate registration registration.Tags.Contains(ready) });endpoints.MapHealthChecks(/hc, new Microsoft.AspNetCore.Diagnostics.HealthChecks.HealthCheckOptions{ResponseWriter HealthChecks.UI.Client.UIResponseWriter.WriteHealthCheckUIResponse});// 没有传检查项检查所有endpoints.MapControllers();endpoints.MapGrpcServiceGeekTime.Ordering.API.Grpc.OrderServiceImpl();});}// Controller调用// 设置Ready的值[HttpGet]public IActionResult SetReady([FromQuery]bool ready){Startup.Ready ready;if (!ready){Task.Run(async () {await Task.Delay(60000);Startup.Ready true;});}return Content(${Environment.MachineName} : Ready{Startup.Ready});}// 设置live
[HttpGet]
public IActionResult SetLive([FromQuery]bool live){Startup.Live live;return Content(${Environment.MachineName} : Live{Startup.Live});}// 程序退出
[HttpGet]
public IActionResult Exit([FromServices]IHostApplicationLifetime application){Task.Run(async () {await Task.Delay(3000);application.StopApplication();});return Content(${Environment.MachineName} : Stopping);}2. 健康检查看板 AspNetCore.Diagnostics.HealthCheck项目开源社区项目插件 2.1 组件包
探针检测端AspNetCore.HealthChecks.UI应用端输出AspNetCore.HealthChecks.UI.Client应用端检查项AspNetCore.HealthChecks.Xxx
// startup
public void ConfigureServices(IServiceCollection services)
{services.AddMvc();services.AddHealthChecks();services.AddHealthChecksUI();}public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{if (env.IsDevelopment()){app.UseDeveloperExceptionPage();}app.UseRouting();app.UseEndpoints(endpoints {endpoints.MapHealthChecks(/live);endpoints.MapHealthChecks(/ready);endpoints.MapHealthChecks(/hc);endpoints.MapMetrics();endpoints.MapHealthChecksUI();// 使得dashboard生效endpoints.MapControllers();});}// 配置文件配置需要检查的项目
HealthChecksUI: {HealthChecks: [{Name: geektime-ordering-api,Uri: http://geektime-ordering-api/hc},{Name: geektime-mobile-apiaggregator,Uri: http://geektime-mobile-apiaggregator/hc},{Name: geektime-mobile-gateway,Uri: http://geektime-mobile-gateway/hc}],
