alibaba/Sentinel

Circuit breaker for outlier service node | sentinel能否对故障实例熔断的隔离

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#2,804 opened on Jul 29, 2022

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Description

现在有A服务调用B服务，B服务有三个节点，其中有个节点发生了异常，我们希望在请求A服务调用B服务的时候，不会把请求打到异常节点上，sentinel能支持在正常节点上负载，对异常节点进行隔离，这样保证主调方迅速自动屏蔽错误率高或故障的服务实例，并启动定时任务对熔断实例进行探活。在达到恢复条件后对其进行半开恢复。在半开恢复后，释放少量请求去进行真实业务探测。并根据真实业务探测结果去判断是否完全恢复正常。

Contributor guide

Research direction
Study the existing circuit breaker implementation in Sentinel and design a mechanism to isolate outlier service nodes while maintaining load balancing on healthy nodes. Investigate how to integrate health checks and half open recovery.
Tech stack
java
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaGitMicroservices
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
55