Sentinel Go 1.0 Release: High Availability Flow Control Middleware for Double 11


Sentinel Introduction

Core Scenarios of High-Availability Protection

1. Traffic Throttling and Allocation

_, err = flow.LoadRules([]*flow.Rule{
Resource: "some-service", // Tracking point resource name
Count: 10, // If the threshold is 10, it is the second-level dimension statistics by default, which indicates that the request cannot exceed 10 times per second.
ControlBehavior: flow.Reject, // The control effect is direct rejection, the time interval between requests is not controlled, and the requests are not queued

2. Warm-Up Traffic Throttling

3. Concurrency Control and Circuit Breaking

4. Hotspot Protection

5. Adaptive System Protection

Cloud Native Exploration

1. Kubernetes CRD Data-Source

kind: FlowRules
name: foo-sentinel-flow-rules
- resource: simple-resource
threshold: 500
- resource: something-to-smooth
threshold: 100
controlBehavior: Throttling
maxQueueingTimeMs: 500
- resource: something-to-warmup
threshold: 200
tokenCalculateStrategy: WarmUp
controlBehavior: Reject
warmUpPeriodSec: 30
warmUpColdFactor: 3

2. Service Mesh

3. Kubernetes HPA Based on Sentinel Metrics

Let’s Start Hacking

Original Source:



Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store
Alibaba Cloud

Alibaba Cloud

Follow me to keep abreast with the latest technology news, industry insights, and developer trends. Alibaba Cloud website: