Istio 概念介绍
一、流量管理
https://istio.io/latest/docs/concepts/traffic-management/
Istio’s traffic routing rules let you easily control the flow of traffic and API calls between services. Istio simplifies configuration of service-level properties like circuit breakers, timeouts, and retries, and makes it easy to set up important tasks like A/B testing, canary rollouts, and staged rollouts with percentage-based traffic splits. It also provides out-of-box reliability features that help make your application more resilient against failures of dependent services or the network.
Istio 的流量路由规则可以让您很容易的控制服务之间的流量和 API 调用。 Istio 简化了服务级别属性的配置，比如熔断器、超时和重试，并且能轻松的设置重要的任务， 如 A/B 测试、金丝雀发布、基于流量百分比切分的分阶段发布等。它还提供了开箱即用的故障恢复特性， 有助于增强应用的健壮性，从而更好地应对被依赖的服务或网络发生故障的情况。
Istio’s traffic management model relies on the Envoy proxies that are deployed along with your services. All traffic that your mesh services send and receive (data plane traffic) is proxied through Envoy, making it easy to direct and control traffic around your mesh without making any changes to your services.
If you’re interested in the details of how the features described in this guide work, you can find out more about Istio’s traffic management implementation in the architecture overview. The rest of this guide introduces Istio’s traffic management features.