Nacos+Spring Cloud Gateway动态路由配置实现步骤-编程学习网

前言

　　Nacos最近项目一直在使用，其简单灵活，支持更细粒度的命令空间，分组等为麻烦复杂的环境切换提供了方便；同时也很好支持动态路由的配置，只需要简单的几步即可。在国产的注册中心、配置中心中比较突出，容易上手，本文通过gateway、nacos-consumer、nacos-provider三个简单模块来展示：Nacos下动态路由配置。

　博文中源码已上传至github(https://github.com/Jian0110/learning-cloudalibaba)，欢迎小伙伴们star

一、Nacos环境准备

1、启动Nacos配置中心并创建路由配置

具体的Nacos怎么配置就不介绍了，可以参考阿里巴巴的官方介绍，这里通过windows直接本地启动开启单机模式，登录Nacos Console，创建dev的namespace，在dev下的默认分组下创建gateway-router的dataId

gateway-router的主要初始化配置如下：关于gateway的组成（id，order、predicates断言，uri）这里就不详细说明的了，可以自行百度下


[{
    "id": "consumer-router",
    "order": 0,
    "predicates": [{
        "args": {
            "pattern": "/consume
@Configuration
public class GatewayConfig {
    public static final long DEFAULT_TIMEOUT = 30000;

    public static String NACOS_SERVER_ADDR;

    public static String NACOS_NAMESPACE;

    public static String NACOS_ROUTE_DATA_ID;

    public static String NACOS_ROUTE_GROUP;

    @Value("${spring.cloud.nacos.discovery.server-addr}")
    public void setNacosServerAddr(String nacosServerAddr){
        NACOS_SERVER_ADDR = nacosServerAddr;
    }

    @Value("${spring.cloud.nacos.discovery.namespace}")
    public void setNacosNamespace(String nacosNamespace){
        NACOS_NAMESPACE = nacosNamespace;
    }

    @Value("${nacos.gateway.route.config.data-id}")
    public void setNacosRouteDataId(String nacosRouteDataId){
        NACOS_ROUTE_DATA_ID = nacosRouteDataId;
    }

    @Value("${nacos.gateway.route.config.group}")
    public void setNacosRouteGroup(String nacosRouteGroup){
        NACOS_ROUTE_GROUP = nacosRouteGroup;
    }

}

properties配置关于Nacos下读取gateway-router的配置：


spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
spring.cloud.nacos.discovery.namespace=08ecd1e5-c042-410a-84d5-b0a8fbeed8ea
nacos.gateway.route.config.data-id=gateway-router
nacos.gateway.route.config.group=DEFAULT_GROUP

第二，初始化路由，监听动态路由配置的数据源变化(2020.12.28解决删除路由不生效问题)；



@Component
@Slf4j
@DependsOn({"gatewayConfig"}) // 依赖于gatewayConfig bean
public class DynamicRouteServiceImplByNacos {

    @Autowired
    private DynamicRouteServiceImpl dynamicRouteService;


    private ConfigService configService;

    @PostConstruct
    public void init() {
        log.info("gateway route init...");
        try{
            configService = initConfigService();
            if(configService == null){
                log.warn("initConfigService fail");
                return;
            }
            String configInfo = configService.getConfig(GatewayConfig.NACOS_ROUTE_DATA_ID, GatewayConfig.NACOS_ROUTE_GROUP, GatewayConfig.DEFAULT_TIMEOUT);
            log.info("获取网关当前配置:\r\n{}",configInfo);
            List<RouteDefinition> definitionList = JSON.parseArray(configInfo, RouteDefinition.class);
            for(RouteDefinition definition : definitionList){
                log.info("update route : {}",definition.toString());
                dynamicRouteService.add(definition);
            }
        } catch (Exception e) {
            log.error("初始化网关路由时发生错误",e);
        }
        dynamicRouteByNacosListener(GatewayConfig.NACOS_ROUTE_DATA_ID,GatewayConfig.NACOS_ROUTE_GROUP);
    }

    
    public void dynamicRouteByNacosListener (String dataId, String group){
        try {
            configService.addListener(dataId, group, new Listener()  {
                @Override
                public void receiveConfigInfo(String configInfo) {
                    log.info("进行网关更新:\n\r{}",configInfo);
                    List<RouteDefinition> definitionList = JSON.parseArray(configInfo, RouteDefinition.class);
                    log.info("update route : {}",definitionList.toString());
                    dynamicRouteService.updateList(definitionList);
                }
                @Override
                public Executor getExecutor() {
                    log.info("getExecutor\n\r");
                    return null;
                }
            });
        } catch (NacosException e) {
            log.error("从nacos接收动态路由配置出错!!!",e);
        }
    }

    
    private ConfigService initConfigService(){
        try{
            Properties properties = new Properties();
            properties.setProperty("serverAddr",GatewayConfig.NACOS_SERVER_ADDR);
            properties.setProperty("namespace",GatewayConfig.NACOS_NAMESPACE);
            return configService= NacosFactory.createConfigService(properties);
        } catch (Exception e) {
            log.error("初始化网关路由时发生错误",e);
            return null;
        }
    }
}

第三，刷新最新的动态路由变化，实现动态增删改路由（2020.12.28解决删除路由不生效问题）



@Slf4j
@Service
public class DynamicRouteServiceImpl implements ApplicationEventPublisherAware {
    @Autowired
    private RouteDefinitionWriter routeDefinitionWriter;
    @Autowired
    private RouteDefinitionLocator routeDefinitionLocator;

    
    @Autowired
    private ApplicationEventPublisher publisher;

    @Override
    public void setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher) {
        this.publisher = applicationEventPublisher;
    }

    
    public String delete(String id) {
        try {
            log.info("gateway delete route id {}",id);
            this.routeDefinitionWriter.delete(Mono.just(id)).subscribe();
            this.publisher.publishEvent(new RefreshRoutesEvent(this));
            return "delete success";
        } catch (Exception e) {
            return "delete fail";
        }
    }

    
    public String updateList(List<RouteDefinition> definitions) {
        log.info("gateway update route {}",definitions);
        // 删除缓存routerDefinition
        List<RouteDefinition> routeDefinitionsExits =  routeDefinitionLocator.getRouteDefinitions().buffer().blockFirst();
        if (!CollectionUtils.isEmpty(routeDefinitionsExits)) {
            routeDefinitionsExits.forEach(routeDefinition -> {
                log.info("delete routeDefinition:{}", routeDefinition);
                delete(routeDefinition.getId());
            });
        }
        definitions.forEach(definition -> {
            updateById(definition);
        });
        return "success";
    }

    
    public String updateById(RouteDefinition definition) {
        try {
            log.info("gateway update route {}",definition);
            this.routeDefinitionWriter.delete(Mono.just(definition.getId()));
        } catch (Exception e) {
            return "update fail,not find route  routeId: "+definition.getId();
        }
        try {
            routeDefinitionWriter.save(Mono.just(definition)).subscribe();
            this.publisher.publishEvent(new RefreshRoutesEvent(this));
            return "success";
        } catch (Exception e) {
            return "update route fail";
        }
    }

    
    public String add(RouteDefinition definition) {
        log.info("gateway add route {}",definition);
        routeDefinitionWriter.save(Mono.just(definition)).subscribe();
        this.publisher.publishEvent(new RefreshRoutesEvent(this));
        return "success";
    }
}

三、测试动态网关配置

1、启动服务，观察注册中心

分别启动gateway、nacos-consumer、nacos-provider三个服务，观察是否已经在Nacos上正确注册

注意：需要指定注册中心的namespace为dev的空间，即spring.cloud.nacos.discovery.namespace=08ecd1e5-c042-410a-84d5-b0a8fbeed8ea

2、访问网关，观察服务日志

（1）查看gateway服务的初始化启动日志：会发现可以正常从Nacos获取配置gateway-router网关配置文件内容，并进行正确路由加载...


2020-05-10 14:33:44.557  INFO 1272 --- [           main] c.g.r.DynamicRouteServiceImplByNacos     : gateway route init...
2020-05-10 14:33:44.578  INFO 1272 --- [           main] c.g.r.DynamicRouteServiceImplByNacos     : 获取网关当前配置:
[{
    "id": "consumer-router",
    "order": 0,
    "predicates": [{
        "args": {
            "pattern": "/consume/**"
        },
        "name": "Path"
    }],
    "uri": "lb://nacos-consumer"
},{
    "id": "provider-router",
    "order": 2,
    "predicates": [{
        "args": {
            "pattern": "/provide/**"
        },
        "name": "Path"
    }],
    "uri": "lb://nacos-provider"
}]
2020-05-10 14:33:44.691  INFO 1272 --- [           main] c.g.r.DynamicRouteServiceImplByNacos     : update route : RouteDefinition{id='consumer-router', predicates=[PredicateDefinition{name='Path', args={pattern=/consume/**}}], filters=[], uri=lb://nacos-consumer, order=0, metadata={}}
2020-05-10 14:33:44.691  INFO 1272 --- [           main] c.g.service.DynamicRouteServiceImpl      : gateway add route RouteDefinition{id='consumer-router', predicates=[PredicateDefinition{name='Path', args={pattern=/consume/**}}], filters=[], uri=lb://nacos-consumer, order=0, metadata={}}
2020-05-10 14:33:45.192  INFO 1272 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [After]
2020-05-10 14:33:45.192  INFO 1272 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Before]
2020-05-10 14:33:45.192  INFO 1272 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Between]
2020-05-10 14:33:45.193  INFO 1272 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Cookie]
2020-05-10 14:33:45.193  INFO 1272 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Header]
2020-05-10 14:33:45.193  INFO 1272 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Host]
2020-05-10 14:33:45.194  INFO 1272 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Method]
2020-05-10 14:33:45.194  INFO 1272 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Path]
2020-05-10 14:33:45.194  INFO 1272 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Query]
2020-05-10 14:33:45.194  INFO 1272 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [ReadBodyPredicateFactory]
2020-05-10 14:33:45.194  INFO 1272 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [RemoteAddr]
2020-05-10 14:33:45.194  INFO 1272 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [Weight]
2020-05-10 14:33:45.194  INFO 1272 --- [           main] o.s.c.g.r.RouteDefinitionRouteLocator    : Loaded RoutePredicateFactory [CloudFoundryRouteService]
2020-05-10 14:33:45.335  INFO 1272 --- [           main] c.g.r.DynamicRouteServiceImplByNacos     : update route : RouteDefinition{id='provider-router', predicates=[PredicateDefinition{name='Path', args={pattern=/provide/**}}], filters=[], uri=lb://nacos-provider, order=2, metadata={}}
2020-05-10 14:33:45.335  INFO 1272 --- [           main] c.g.service.DynamicRouteServiceImpl      : gateway add route RouteDefinition{id='provider-router', predicates=[PredicateDefinition{name='Path', args={pattern=/provide/**}}], filters=[], uri=lb://nacos-provider, order=2, metadata={}}
2020-05-10 14:33:45.336  INFO 1272 --- [           main] c.g.r.DynamicRouteServiceImplByNacos     : update route : RouteDefinition{id='github-router', predicates=[PredicateDefinition{name='Path', args={pattern=/github}}], filters=[], uri=https://github.com, order=3, metadata={}}
2020-05-10 14:33:45.336  INFO 1272 --- [           main] c.g.service.DynamicRouteServiceImpl      : gateway add route RouteDefinition{id='github-router', predicates=[PredicateDefinition{name='Path', args={pattern=/github}}], filters=[], uri=https://github.com, order=3, metadata={}}

但这只能说明是初始化静态路由，下面我们改变gateway-router网关配置内容，追加github-router路由


[{
    "id": "consumer-router",
    "order": 0,
    "predicates": [{
        "args": {
            "pattern": "/consume/**"
        },
        "name": "Path"
    }],
    "uri": "lb://nacos-consumer"
},{
    "id": "provider-router",
    "order": 2,
    "predicates": [{
        "args": {
            "pattern": "/provide/**"
        },
        "name": "Path"
    }],
    "uri": "lb://nacos-provider"
},{
    "id": "github-router",
    "order": 2,
    "predicates": [{
        "args": {
            "pattern": "/github/**"
        },
        "name": "Path"
    }],
    "uri": "https://github.com"
}]

之后点击发布更新路由配置

观察gateway服务日志，有没有监听，并且进行正确的路由更新：如下日志所示，最新路由配置立马被打印，并且进行正确路由更新


2020-05-10 14:42:27.576  INFO 1272 --- [d5-b0a8fbeed8ea] c.g.r.DynamicRouteServiceImplByNacos     : 进行网关更新:

[{
    "id": "consumer-router",
    "order": 0,
    "predicates": [{
        "args": {
            "pattern": "/consume/**"
        },
        "name": "Path"
    }],
    "uri": "lb://nacos-consumer"
},{
    "id": "provider-router",
    "order": 2,
    "predicates": [{
        "args": {
            "pattern": "/provide/**"
        },
        "name": "Path"
    }],
    "uri": "lb://nacos-provider"
},{
    "id": "github-router",
    "order": 2,
    "predicates": [{
        "args": {
            "pattern": "/github/**"
        },
        "name": "Path"
    }],
    "uri": "https://github.com"
}]
2020-05-10 14:42:27.576  INFO 1272 --- [d5-b0a8fbeed8ea] c.g.r.DynamicRouteServiceImplByNacos     : update route : RouteDefinition{id='consumer-router', predicates=[PredicateDefinition{name='Path', args={pattern=/consume/**}}], filters=[], uri=lb://nacos-consumer, order=0, metadata={}}
2020-05-10 14:42:27.576  INFO 1272 --- [d5-b0a8fbeed8ea] c.g.service.DynamicRouteServiceImpl      : gateway update route RouteDefinition{id='consumer-router', predicates=[PredicateDefinition{name='Path', args={pattern=/consume/**}}], filters=[], uri=lb://nacos-consumer, order=0, metadata={}}
2020-05-10 14:42:27.578  INFO 1272 --- [d5-b0a8fbeed8ea] c.g.r.DynamicRouteServiceImplByNacos     : update route : RouteDefinition{id='provider-router', predicates=[PredicateDefinition{name='Path', args={pattern=/provide/**}}], filters=[], uri=lb://nacos-provider, order=2, metadata={}}
2020-05-10 14:42:27.578  INFO 1272 --- [d5-b0a8fbeed8ea] c.g.service.DynamicRouteServiceImpl      : gateway update route RouteDefinition{id='provider-router', predicates=[PredicateDefinition{name='Path', args={pattern=/provide/**}}], filters=[], uri=lb://nacos-provider, order=2, metadata={}}
2020-05-10 14:42:27.580  INFO 1272 --- [d5-b0a8fbeed8ea] c.g.r.DynamicRouteServiceImplByNacos     : update route : RouteDefinition{id='github-router', predicates=[PredicateDefinition{name='Path', args={pattern=/github/**}}], filters=[], uri=https://github.com, order=2, metadata={}}
2020-05-10 14:42:27.580  INFO 1272 --- [d5-b0a8fbeed8ea] c.g.service.DynamicRouteServiceImpl      : gateway update route RouteDefinition{id='github-router', predicates=[PredicateDefinition{name='Path', args={pattern=/github/**}}], filters=[], uri=https://github.com, order=2, metadata={}}

其实，还有办法可以知道我们的gateway服务有没有监听Nacos的gateway-router配置，那就是在Nacos Console--->监听查询----->选择配置---->输入配置文件的namespace与Group：可以发现我本地IP地址127.0.0.1对配置文件gateway-router进行了监听

（2）访问gateway网关服务：http://localhost:6003/consume/sayHello/nacos

查看consumer服务日志：

2020-05-10 14:55:07.257 INFO 6552 --- [nio-6001-exec-2] c.n.c.controller.ConsumeController : I'm calling nacos-consumer service by dynamic gateway...

发现跳转至consumer服务，并且访问了consumer服务的CosnumerController

（3）访问gateway网关服务：http://localhost:6003/provider/sayHello/nacos

查看provider服务日志：

2020-05-10 14:56:56.144 INFO 10024 --- [nio-6002-exec-1] c.n.p.controller.ProviderController : I'm calling nacos-provider service by dynamic gateway...

发现跳转至consumer服务，并且访问了provider服务的ProviderController

（4）访问访问gateway网关服务：http://localhost:6003/github，正确跳转至github页面

四、总结

　　1）Spring Cloud Gateway作用不光只是简单的跳转重定向，还可以实现用户的验证登录，解决跨域，日志拦截，权限控制，限流，熔断，负载均衡，黑名单和白名单机制等。是微服务架构不二的选择；

　　2）Nacos的配置中心支持动态获取配置文件，可以将一些全局的经常变更的配置文件放在Nacos下，需要到微服务自行获取。

2020.12.28解决删除路由不生效问题，主要是利用RouteDefinitionLocator先读取变化之前的RouteDefinition，之后删除重新再更新，或者可以实现routeDefinitionWriter、RouteDefinitionLocator重写如下方法：


Mono<Void> save(Mono<RouteDefinition> route);
Mono<Void> delete(Mono<String> routeId);
Flux<RouteDefinition> getRouteDefinitions();

到此这篇关于Nacos+Spring Cloud Gateway动态路由配置实现步骤的文章就介绍到这了,更多相关Spring Cloud Gateway动态路由内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网！

文章详情

Nacos+Spring Cloud Gateway动态路由配置实现步骤

目录

前言

一、Nacos环境准备

1、启动Nacos配置中心并创建路由配置

三、测试动态网关配置

1、启动服务，观察注册中心

2、访问网关，观察服务日志

四、总结

软考中级精品资料免费领

相关文章

猜你喜欢

Nacos+Spring Cloud Gateway动态路由配置实现步骤

Nacos+Spring Cloud Gateway动态路由如何配置实现

Spring Cloud Gateway动态路由Apollo实现详解

配置gateway+nacos动态路由管理流程

Spring Cloud 整合 nacos实现动态配置中心的详细步骤

Spring Cloud中的动态路由怎么利用 Zuul实现

全面讲解动态路由协议之RIP配置步骤

PHP中使用路由匹配器实现路由规则的动态配置和扩展