Sentinel Plugin

Explanation

• Sentinel is one of the options that supports flow control and circuit breaking.
• Sentinel supports flow control and circuit breaking functions for gateway.

Plugin Setting

• In soul-admin --> plugin management --> sentinel set to enable.
• If you don't want to use it, please close the plugin in soul-admin.

Plugin Usage

• Introducing the follow supports to the pom.xml file of soul project.

  <!-- soul sentinel plugin start-->
  <dependency>
      <groupId>org.dromara</groupId>
      <artifactId>soul-spring-boot-starter-plugin-sentinel</artifactId>
       <version>${last.version}</version>
  </dependency>
  <!-- soul sentinel plugin end-->

• Selectors and rules, please refer to: selector

• Sentinel Processing Details

  • flowRuleEnable (1 or 0): whether enable sentinel flow control function.

  • flowRuleControlBehavior: effect(reject directly/ queue/ slow start up), it do not support flow control by invocation relation.

  • flowRuleGrade: type of current limit threshold(QPS or Thread Count)。

  • degradeRuleEnable (1 or 0): whether enable circuit breaking function of sentinel.

  • degradeRuleGrade: circuit breaker strategy, support RT of seconds level/ Error Ratio of seconds level/ Error Count of minutes level strategy.

  • degradeRuleCount: threshold.

  • degradeRuleTimeWindow: time of degrading(unit: second).

  • fallbackUri: degraded uri after circuit breaking.