#!/bin/bash
JAVA_OPTS=”-server -Xms1g -Xmx1g -Xmn512m”
JAVA_OPTS=”${JAVA_OPTS} -XX:+UseG1GC -XX:MaxGCPauseMillis=200″
JAVA_OPTS=”${JAVA_OPTS} -Dserver.port=8080″
JAVA_OPTS=”${JAVA_OPTS} -Dcsp.sentinel.dashboard.server=192.168.1.51:8080″
JAVA_OPTS=”${JAVA_OPTS} -Dproject.name=sentinel-dashboard”
JAVA_OPTS=”${JAVA_OPTS} -Dsentinel.dashboard.auth.username=admin”
JAVA_OPTS=”${JAVA_OPTS} -Dsentinel.dashboard.auth.password=fgedu123″
JAVA_OPTS=”${JAVA_OPTS} -Dserver.servlet.session.timeout=7200″
JAVA_OPTS=”${JAVA_OPTS} -Dcsp.sentinel.log.dir=/data/sentinel/logs”
JAVA_OPTS=”${JAVA_OPTS} -Dsentinel.datasource.nacos.server-addr=192.168.1.51:8848″
JAVA_OPTS=”${JAVA_OPTS} -Dsentinel.datasource.nacos.namespace=sentinel”
JAVA_OPTS=”${JAVA_OPTS} -Dsentinel.datasource.nacos.group-id=SENTINEL_GROUP”

nohup java ${JAVA_OPTS} -jar /opt/sentinel/sentinel-dashboard-1.8.7.jar > /data/sentinel/logs/startup.log 2>&1 &

# 创建systemd服务
$ vi /etc/systemd/system/sentinel.service

[Unit]
Description=Sentinel Dashboard
After=network.target

[Service]
Type=simple
User=sentinel
Group=sentinel
ExecStart=/opt/sentinel/start.sh
ExecStop=/usr/bin/pkill -f sentinel-dashboard
Restart=on-failure

[Install]
WantedBy=multi-user.target

# 启用服务
# systemctl enable sentinel
# systemctl start sentinel

# application.yml配置
spring:
application:
name: fgedu-service
cloud:
sentinel:
transport:
dashboard: 192.168.1.51:8080
port: 8719
datasource:
flow:
nacos:
server-addr: 192.168.1.51:8848
data-id: ${spring.application.name}-flow-rules
group-id: SENTINEL_GROUP
rule-type: flow
degrade:
nacos:
server-addr: 192.168.1.51:8848
data-id: ${spring.application.name}-degrade-rules
group-id: SENTINEL_GROUP
rule-type: degrade

# 使用注解配置资源
@RestController
public class FgeduController {

@SentinelResource(value = “fgedu-api”, blockHandler = “handleBlock”, fallback = “handleFallback”)
@GetMapping(“/api/fgedu”)
public String fgeduApi(@RequestParam String param) {
// 业务逻辑
return “success”;
}

public String handleBlock(String param, BlockException ex) {
return “blocked: ” + ex.getClass().getSimpleName();
}

public String handleFallback(String param, Throwable ex) {
return “fallback: ” + ex.getMessage();
}
}

# 1. QPS限流
FlowRule qpsRule = new FlowRule(“fgedu-api”);
qpsRule.setGrade(RuleConstant.FLOW_GRADE_QPS);
qpsRule.setCount(100);

# 2. 并发线程数限流
FlowRule threadRule = new FlowRule(“fgedu-api”);
threadRule.setGrade(RuleConstant.FLOW_GRADE_THREAD);
threadRule.setCount(50);

# 3. Warm Up模式
FlowRule warmUpRule = new FlowRule(“fgedu-api”);
warmUpRule.setGrade(RuleConstant.FLOW_GRADE_QPS);
warmUpRule.setCount(100);
warmUpRule.setControlBehavior(RuleConstant.CONTROL_BEHAVIOR_WARM_UP);
warmUpRule.setWarmUpPeriodSec(10);

# 4. 排队等待模式
FlowRule queueRule = new FlowRule(“fgedu-api”);
queueRule.setGrade(RuleConstant.FLOW_GRADE_QPS);
queueRule.setCount(100);
queueRule.setControlBehavior(RuleConstant.CONTROL_BEHAVIOR_RATE_LIMITER);
queueRule.setMaxQueueingTimeMs(500);

# 5. 关联限流
FlowRule relateRule = new FlowRule(“fgedu-api”);
relateRule.setGrade(RuleConstant.FLOW_GRADE_QPS);
relateRule.setCount(100);
relateRule.setStrategy(RuleConstant.STRATEGY_RELATE);
relateRule.setRefResource(“fgedu-write-api”);

# 6. 系统保护规则
SystemRule systemRule = new SystemRule();
systemRule.setHighestSystemLoad(10); // 最大Load
systemRule.setHighestCpuUsage(0.8); // 最大CPU使用率
systemRule.setAvgRt(1000); // 最大平均响应时间
systemRule.setMaxThread(100); // 最大并发线程数
systemRule.setQps(1000); // 最大入口QPS
SystemRuleManager.loadRules(Collections.singletonList(systemRule));