// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env, IHostApplicationLifetime lifetime)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseRouting();
// register this service
ServiceEntity serviceEntity = new ServiceEntity
{
IP = GetLocalIP(),
Port = Convert.ToInt32(Configuration["Service:Port"]),
ServiceName = Configuration["Service:Name"],
ConsulIP = Configuration["Consul:IP"],
ConsulPort = Convert.ToInt32(Configuration["Consul:Port"])
};
app.RegisterConsul(lifetime, serviceEntity);
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
public static IApplicationBuilder RegisterConsul(this IApplicationBuilder app,
IHostApplicationLifetime lifetime, ServiceEntity serviceEntity)
{
var consulClient = new ConsulClient(x => x.Address = new Uri($"http://{serviceEntity.ConsulIP}:{serviceEntity.ConsulPort}"));//请求注册的 Consul 地址
var httpCheck = new AgentServiceCheck()
{
DeregisterCriticalServiceAfter = TimeSpan.FromSeconds(5), //服务启动多久后注册
Interval = TimeSpan.FromSeconds(10), //健康检查时间间隔，或者称为心跳间隔
HTTP = $"http://{serviceEntity.IP}:{serviceEntity.Port}/api/health", //健康检查地址
Timeout = TimeSpan.FromSeconds(5)
};
// Register service with consul
var registration = new AgentServiceRegistration()
{
Checks = new[] { httpCheck },
ID = Guid.NewGuid().ToString(),
Name = serviceEntity.ServiceName,
Address = serviceEntity.IP,
Port = serviceEntity.Port,
Tags = new[] { serviceEntity.IP, $"{serviceEntity.Port}", $"http://{serviceEntity.IP}:{serviceEntity.Port}/api/health" }//添加 urlprefix-/servicename 格式的 tag 标签，以便 Fabio 识别
};
consulClient.Agent.ServiceRegister(registration).Wait();//服务启动时注册，内部实现其实就是使用 Consul API 进行注册（HttpClient发起）
lifetime.ApplicationStopping.Register(() =>
{
consulClient.Agent.ServiceDeregister(registration.ID).Wait();//服务停止时取消注册
});
return(app);
}
