一 ：修改pom.xml中的sentinel-datasource-nacos的依賴，將<scope>test</scope>註釋掉，這樣才能在主程式中使用。

<dependency>
    <groupId>com.alibaba.csp</groupId>
    <artifactId>sentinel-datasource-nacos</artifactId>
    <!--<scope>test</scope>-->
</dependency>

 二：找到resources/app/scripts/directives/sidebar/sidebar.html中的這段程式碼：

<li ui-sref-active="active">
    <a ui-sref="dashboard.flowV1({app: entry.app})">
        <i class="glyphicon glyphicon-filter"></i>&nbsp;&nbsp;流控規則
    </a>
</li>

修改為：

<li ui-sref-active="active">
    <a ui-sref="dashboard.flow({app: entry.app})">
        <i class="glyphicon glyphicon-filter"></i>&nbsp;&nbsp;流控規則
    </a>
</li>

這樣修改之後就會跳轉到FlowControllerV2的介面。

三：再專案com.alibaba.csp.sentinel.dashboard中新建一個nacos包來實現擴充套件功能。

@Component
@ConfigurationProperties(prefix = "nacos.server")
public class NacosConfigProperties {

    private String ip;

    private String port;

    private String namespace;

    private String groupId;

    public String getIp() {
        return ip;
    }
    public void setIp(String ip) {
        this.ip = ip;
    }
    public String getPort() {
        return port;
    }
    public void setPort(String port) {
        this.port = port;
    }
    public String getNamespace() {
        return namespace;
    }
    public void setNamespace(String namespace) {
        this.namespace = namespace;
    }
    public String getGroupId() {
        return groupId;
    }
    public void setGroupId(String groupId) {
        this.groupId = groupId;
    }
    public String getServerAddr() {
        return this.getIp()+":"+this.getPort();
    }
    @Override
    public String toString() {
        return "NacosConfigProperties [ip=" + ip + ", port=" + port + ", namespace="
                + namespace + ", groupId=" + groupId + "]";
    }

}

public final class NacosConfigConstant {
    public static final String FLOW_DATA_ID_POSTFIX = "-sentinel-flow";
    public static final String GROUP_ID = "DEFAULT_GROUP";
}

@Configuration
public class NacosConfig {

    @Autowired
    private NacosConfigProperties nacosConfigProperties;

    /**
     * 非常關鍵 這裡將FlowRuleEntity轉換成FlowRule才會對客戶端生效
     * @return FlowRule
     */
    @Bean
    public Converter<List<FlowRuleEntity>, String> flowRuleEntityEncoder() {
        return rules -> JSON.toJSONString(rules.stream().map(FlowRuleEntity::toRule).collect(Collectors.toList()), true);
    }

    @Bean
    public Converter<String, List<FlowRuleEntity>> flowRuleEntityDecoder() {
        return s -> JSON.parseArray(s, FlowRuleEntity.class);
    }

    @Bean
    public ConfigService nacosConfigService() throws Exception {
        Properties properties = new Properties();
        properties.put(PropertyKeyConst.SERVER_ADDR, nacosConfigProperties.getServerAddr());
        properties.put(PropertyKeyConst.NAMESPACE, nacosConfigProperties.getNamespace());
        return ConfigFactory.createConfigService(properties);
    }
}

四：編寫動態推拉模式的擴充套件程式碼

@Component("flowRuleNacosProvider")
public class FlowRuleNacosProvider implements DynamicRuleProvider<List<FlowRuleEntity>> {

    private static Logger logger = LoggerFactory.getLogger(FlowRuleNacosProvider.class);

    @Autowired
    private NacosConfigProperties nacosConfigProperties;

    @Autowired
    private ConfigService configService;

    @Autowired
    private Converter<String, List<FlowRuleEntity>> converter;

    @Override
    public List<FlowRuleEntity> getRules(String appName) throws Exception {
        String rules = configService.getConfig(appName + NacosConfigConstant.FLOW_DATA_ID_POSTFIX, nacosConfigProperties.getGroupId(), 3000);
        logger.info("從Nacos中拉取到限流規則資訊:{}",rules);
        if (StringUtil.isEmpty(rules)) {
            return new ArrayList<>();
        }
        return converter.convert(rules);
    }
}

@Component("flowRuleNacosPublisher")
public class FlowRuleNacosPublisher implements DynamicRulePublisher<List<FlowRuleEntity>> {

    @Autowired
    private NacosConfigProperties nacosConfigProperties;

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter<List<FlowRuleEntity>, String> converter;

    @Override
    public void publish(String app, List<FlowRuleEntity> rules) throws Exception {
        AssertUtil.notEmpty(app, "app name cannot be empty");
        if (rules == null) {
            return;
        }
        configService.publishConfig(app + NacosConfigConstant.FLOW_DATA_ID_POSTFIX, nacosConfigProperties.getGroupId(), converter.convert(rules));
    }

}

五：然後將FlowControllerV2中的預設DynamicRuleProvider和DynamicRulePublisher修改為：

@Autowired
@Qualifier("flowRuleNacosProvider")
private DynamicRuleProvider<List<FlowRuleEntity>> ruleProvider;
@Autowired
@Qualifier("flowRuleNacosPublisher")
private DynamicRulePublisher<List<FlowRuleEntity>> rulePublisher;

private void publishRules(/*@NonNull*/ String app) throws Exception {
    List<FlowRuleEntity> rules = repository.findAllByApp(app);
    rulePublisher.publish(app, rules);
    logger.info("新增限流規則成功{}", JSON.toJSONString(rules.stream().map(FlowRuleEntity::toRule).collect(Collectors.toList()), true));
}

六：application.properties配置檔案

#nacos
nacos.server.ip=localhost
nacos.server.port=8848
nacos.server.namespace=
nacos.server.gro