速读摘要文章源自JAVA秀-https://www.javaxiu.com/5348.html
最近在github上看了soul网关的设计,突然就来了兴趣准备自己从零开始写一个高性能的网关。经过两周时间的开发,我的网关ship-gate核心功能基本都已完成,最大的缺陷就是前端功底太差没有管理后台。20个线程,500个连接数,吞吐量大概每秒9400个请求。千里之行始于足下,开始以为写一个网关会很难,但当你实际开始行动时就会发现其实没那么难,所以迈出第一步很重要。过程中也遇到了很多问题,还在github上给soul和nacos这两个开源项目提了两个issue,后来发现是自己的问题文章源自JAVA秀-https://www.javaxiu.com/5348.html
原文约 4115 字 | 图片 11 张 | 建议阅读 9 分钟 | 评价反馈文章源自JAVA秀-https://www.javaxiu.com/5348.html
如何设计一个高性能网关?
程序IT圈 文章源自JAVA秀-https://www.javaxiu.com/5348.html
文章源自JAVA秀-https://www.javaxiu.com/5348.html
- 背景 -文章源自JAVA秀-https://www.javaxiu.com/5348.html
最近在github上看了soul网关的设计,突然就来了兴趣准备自己从零开始写一个高性能的网关。经过两周时间的开发,我的网关ship-gate核心功能基本都已完成,最大的缺陷就是前端功底太差没有管理后台。文章源自JAVA秀-https://www.javaxiu.com/5348.html
文章源自JAVA秀-https://www.javaxiu.com/5348.html
- 设计 -文章源自JAVA秀-https://www.javaxiu.com/5348.html
1、技术选型
网关是所有请求的入口,所以要求有很高的吞吐量,为了实现这点可以使用请求异步化来解决。目前一般有以下两种方案:文章源自JAVA秀-https://www.javaxiu.com/5348.html
Tomcat/Jetty+NIO+Servlet3文章源自JAVA秀-https://www.javaxiu.com/5348.html
Servlet3已经支持异步,这种方案使用比较多,京东,有赞和Zuul,都用的是这种方案。文章源自JAVA秀-https://www.javaxiu.com/5348.html
Netty+NIO文章源自JAVA秀-https://www.javaxiu.com/5348.html
Netty为高并发而生,目前唯品会的网关使用这个策略,在唯品会的技术文章中在相同的情况下Netty是每秒30w+的吞吐量,Tomcat是13w+,可以看出是有一定的差距的,但是Netty需要自己处理HTTP协议,这一块比较麻烦。文章源自JAVA秀-https://www.javaxiu.com/5348.html
后面发现Soul网关是基于Spring WebFlux(底层Netty)的,不用太关心HTTP协议的处理,于是决定也用Spring WebFlux。文章源自JAVA秀-https://www.javaxiu.com/5348.html
网关的第二个特点是具备可扩展性,比如Netflix Zuul有preFilters,postFilters等在不同的阶段方便处理不同的业务,基于责任链模式将请求进行链式处理即可实现。文章源自JAVA秀-https://www.javaxiu.com/5348.html
在微服务架构下,服务都会进行多实例部署来保证高可用,请求到达网关时,网关需要根据URL找到所有可用的实例,这时就需要服务注册和发现功能,即注册中心。文章源自JAVA秀-https://www.javaxiu.com/5348.html
现在流行的注册中心有Apache的Zookeeper和阿里的Nacos两种(consul有点小众),因为之前写RPC框架时已经用过了Zookeeper,所以这次就选择了Nacos。文章源自JAVA秀-https://www.javaxiu.com/5348.html
2、需求清单
首先要明确目标,即开发一个具备哪些特性的网关,总结下后如下:文章源自JAVA秀-https://www.javaxiu.com/5348.html
自定义路由规则文章源自JAVA秀-https://www.javaxiu.com/5348.html
可基于version的路由规则设置,路由对象包括DEFAUL,HEADER和QUERY三种,匹配方式包括=、regex、like三种。文章源自JAVA秀-https://www.javaxiu.com/5348.html
跨语言文章源自JAVA秀-https://www.javaxiu.com/5348.html
HTTP协议天生跨语言文章源自JAVA秀-https://www.javaxiu.com/5348.html
高性能文章源自JAVA秀-https://www.javaxiu.com/5348.html
Netty本身就是一款高性能的通信框架,同时server将一些路由规则等数据缓存到JVM内存避免请求admin服务。文章源自JAVA秀-https://www.javaxiu.com/5348.html
高可用文章源自JAVA秀-https://www.javaxiu.com/5348.html
支持集群模式防止单节点故障,无状态。文章源自JAVA秀-https://www.javaxiu.com/5348.html
灰度发布文章源自JAVA秀-https://www.javaxiu.com/5348.html
灰度发布(又名金丝雀发布)是指在黑与白之间,能够平滑过渡的一种发布方式。在其上可以进行A/B testing,即让一部分用户继续用产品特性A,一部分用户开始用产品特性B,如果用户对B没有什么反对意见,那么逐步扩大范围,把所有用户都迁移到B上面来。通过特性一可以实现。文章源自JAVA秀-https://www.javaxiu.com/5348.html
接口鉴权文章源自JAVA秀-https://www.javaxiu.com/5348.html
基于责任链模式,用户开发自己的鉴权插件即可。文章源自JAVA秀-https://www.javaxiu.com/5348.html
负载均衡文章源自JAVA秀-https://www.javaxiu.com/5348.html
支持多种负载均衡算法,如随机,轮询,加权轮询等。利用SPI机制可以根据配置进行动态加载。文章源自JAVA秀-https://www.javaxiu.com/5348.html
3、架构设计
在参考了一些优秀的网关Zuul,Spring Cloud Gateway,Soul后,将项目划分为以下几个模块。文章源自JAVA秀-https://www.javaxiu.com/5348.html
文章源自JAVA秀-https://www.javaxiu.com/5348.html
它们之间的关系如图:文章源自JAVA秀-https://www.javaxiu.com/5348.html
文章源自JAVA秀-https://www.javaxiu.com/5348.html
网关设计文章源自JAVA秀-https://www.javaxiu.com/5348.html
注意: 这张图与实际实现有点出入,Nacos push到本地缓存的那个环节没有实现,目前只有ship-sever定时轮询pull的过程。ship-admin从Nacos获取注册服务信息的过程,也改成了ServiceA启动时主动发生HTTP请求通知ship-admin。文章源自JAVA秀-https://www.javaxiu.com/5348.html
4、表结构设计
文章源自JAVA秀-https://www.javaxiu.com/5348.html
文章源自JAVA秀-https://www.javaxiu.com/5348.html
- 编码 -文章源自JAVA秀-https://www.javaxiu.com/5348.html
1、ship-client-spring-boot-starter文章源自JAVA秀-https://www.javaxiu.com/5348.html
首先创建一个spring-boot-starter命名为ship-client-spring-boot-starter,不知道如何自定义starter的可以看我以前写的《开发自己的starter》。文章源自JAVA秀-https://www.javaxiu.com/5348.html
其核心类 AutoRegisterListener 就是在项目启动时做了两件事:文章源自JAVA秀-https://www.javaxiu.com/5348.html
1.将服务信息注册到Nacos注册中心文章源自JAVA秀-https://www.javaxiu.com/5348.html
2.通知ship-admin服务上线了并注册下线hook。文章源自JAVA秀-https://www.javaxiu.com/5348.html
代码如下:文章源自JAVA秀-https://www.javaxiu.com/5348.html
* Created by 2YSP on 2020/12/21*/public class AutoRegisterListener implements ApplicationListener<ContextRefreshedEvent> { private final static Logger LOGGER = LoggerFactory.getLogger(AutoRegisterListener.class); private volatile AtomicBoolean registered = new AtomicBoolean(false); private final ClientConfigProperties properties; @NacosInjected private NamingService namingService; @Autowired private RequestMappingHandlerMapping handlerMapping; private final ExecutorService pool; /*** url list to ignore*/ private static List<String> ignoreUrlList = new LinkedList<>(); static { ignoreUrlList.add("/error"); } public AutoRegisterListener(ClientConfigProperties properties) { if (!check(properties)) { LOGGER.error("client config port,contextPath,appName adminUrl and version can't be empty!"); throw new ShipException("client config port,contextPath,appName adminUrl and version can't be empty!"); } this.properties = properties; pool = new ThreadPoolExecutor(1, 4, 0, TimeUnit.SECONDS, new LinkedBlockingQueue<>()); } /*** check the ClientConfigProperties** @param properties* @return*/ private boolean check(ClientConfigProperties properties) { if (properties.getPort() == null| properties.getContextPath() == null | properties.getVersion() == null| properties.getAppName() == null | properties.getAdminUrl() == null) { return false; } return true; } @Override public void onApplicationEvent(ContextRefreshedEvent event) { if (!registered.compareAndSet(false, true)) { return; } doRegister(); registerShutDownHook(); } /*** send unregister request to admin when jvm shutdown*/ private void registerShutDownHook() { final String url = "http://" + properties.getAdminUrl() + AdminConstants.UNREGISTER_PATH; final UnregisterAppDTO unregisterAppDTO = new UnregisterAppDTO(); unregisterAppDTO.setAppName(properties.getAppName()); unregisterAppDTO.setVersion(properties.getVersion()); unregisterAppDTO.setIp(IpUtil.getLocalIpAddress()); unregisterAppDTO.setPort(properties.getPort()); Runtime.getRuntime().addShutdownHook(new Thread(() -> { OkhttpTool.doPost(url, unregisterAppDTO); LOGGER.info("[{}:{}] unregister from ship-admin success!", unregisterAppDTO.getAppName(), unregisterAppDTO.getVersion()); })); } /*** register all interface info to register center*/ private void doRegister() { Instance instance = new Instance(); instance.setIp(IpUtil.getLocalIpAddress()); instance.setPort(properties.getPort()); instance.setEphemeral(true); Map<String, String> metadataMap = new HashMap<>(); metadataMap.put("version", properties.getVersion()); metadataMap.put("appName", properties.getAppName()); instance.setMetadata(metadataMap); try { namingService.registerInstance(properties.getAppName(), NacosConstants.APP_GROUP_NAME, instance); } catch (NacosException e) { LOGGER.error("register to nacos fail", e); throw new ShipException(e.getErrCode(), e.getErrMsg()); } LOGGER.info("register interface info to nacos success!"); // send register request to ship-admin String url = "http://" + properties.getAdminUrl() + AdminConstants.REGISTER_PATH; RegisterAppDTO registerAppDTO = buildRegisterAppDTO(instance); OkhttpTool.doPost(url, registerAppDTO); LOGGER.info("register to ship-admin success!"); } private RegisterAppDTO buildRegisterAppDTO(Instance instance) { RegisterAppDTO registerAppDTO = new RegisterAppDTO(); registerAppDTO.setAppName(properties.getAppName()); registerAppDTO.setContextPath(properties.getContextPath()); registerAppDTO.setIp(instance.getIp()); registerAppDTO.setPort(instance.getPort()); registerAppDTO.setVersion(properties.getVersion()); return registerAppDTO; }}
2、ship-server文章源自JAVA秀-https://www.javaxiu.com/5348.html
ship-sever项目主要包括了两个部分内容, 1.请求动态路由的主流程 2.本地缓存数据和ship-admin及nacos同步,这部分在后面3.3再讲。文章源自JAVA秀-https://www.javaxiu.com/5348.html
ship-server实现动态路由的原理是利用WebFilter拦截请求,然后将请求教给plugin chain去链式处理。文章源自JAVA秀-https://www.javaxiu.com/5348.html
PluginFilter根据URL解析出appName,然后将启用的plugin组装成plugin chain。文章源自JAVA秀-https://www.javaxiu.com/5348.html
public class PluginFilter implements WebFilter { private ServerConfigProperties properties; public PluginFilter(ServerConfigProperties properties) { this.properties = properties; } @Override public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) { String appName = parseAppName(exchange); if (CollectionUtils.isEmpty(ServiceCache.getAllInstances(appName))) { throw new ShipException(ShipExceptionEnum.SERVICE_NOT_FIND); } PluginChain pluginChain = new PluginChain(properties, appName); pluginChain.addPlugin(new DynamicRoutePlugin(properties)); pluginChain.addPlugin(new AuthPlugin(properties)); return pluginChain.execute(exchange, pluginChain); } private String parseAppName(ServerWebExchange exchange) { RequestPath path = exchange.getRequest().getPath(); String appName = path.value().split("/")[1]; return appName; }}```PluginChain继承了AbstractShipPlugin并持有所有要执行的插件。```java* @Author: Ship* @Description:* @Date: Created in 2020/12/25*/public class PluginChain extends AbstractShipPlugin { /*** the pos point to current plugin*/ private int pos; /*** the plugins of chain*/ private List<ShipPlugin> plugins; private final String appName; public PluginChain(ServerConfigProperties properties, String appName) { super(properties); this.appName = appName; } /*** add enabled plugin to chain** @param shipPlugin*/ public void addPlugin(ShipPlugin shipPlugin) { if (plugins == null) { plugins = new ArrayList<>(); } if (!PluginCache.isEnabled(appName, shipPlugin.name())) { return; } plugins.add(shipPlugin); // order by the plugin's order plugins.sort(Comparator.comparing(ShipPlugin::order)); } @Override public Integer order() { return null; } @Override public String name() { return null; } @Override public Mono<Void> execute(ServerWebExchange exchange, PluginChain pluginChain) { if (pos == plugins.size()) { return exchange.getResponse().setComplete(); } return pluginChain.plugins.get(pos++).execute(exchange, pluginChain); } public String getAppName() { return appName; }}
AbstractShipPlugin实现了ShipPlugin接口,并持有ServerConfigProperties配置对象。文章源自JAVA秀-https://www.javaxiu.com/5348.html
public abstract class AbstractShipPlugin implements ShipPlugin { protected ServerConfigProperties properties; public AbstractShipPlugin(ServerConfigProperties properties) { this.properties = properties; }}```ShipPlugin接口定义了所有插件必须实现的三个方法order(),name()和execute()。```javapublic interface ShipPlugin { /*** lower values have higher priority** @return*/ Integer order(); /*** return current plugin name** @return*/ String name(); Mono<Void> execute(ServerWebExchange exchange,PluginChain pluginChain);}```DynamicRoutePlugin继承了抽象类AbstractShipPlugin,包含了动态路由的主要业务逻辑。```java* @Author: Ship* @Description:* @Date: Created in 2020/12/25*/public class DynamicRoutePlugin extends AbstractShipPlugin { private final static Logger LOGGER = LoggerFactory.getLogger(DynamicRoutePlugin.class); private static WebClient webClient; private static final Gson gson = new GsonBuilder().create(); static { HttpClient httpClient = HttpClient.create() .tcpConfiguration(client -> client.doOnConnected(conn -> conn.addHandlerLast(new ReadTimeoutHandler(3)) .addHandlerLast(new WriteTimeoutHandler(3))) .option(ChannelOption.TCP_NODELAY, true) ); webClient = WebClient.builder().clientConnector(new ReactorClientHttpConnector(httpClient)) .build(); } public DynamicRoutePlugin(ServerConfigProperties properties) { super(properties); } @Override public Integer order() { return ShipPluginEnum.DYNAMIC_ROUTE.getOrder(); } @Override public String name() { return ShipPluginEnum.DYNAMIC_ROUTE.getName(); } @Override public Mono<Void> execute(ServerWebExchange exchange, PluginChain pluginChain) { String appName = pluginChain.getAppName(); ServiceInstance serviceInstance = chooseInstance(appName, exchange.getRequest());// LOGGER.info("selected instance is [{}]", gson.toJson(serviceInstance)); // request service String url = buildUrl(exchange, serviceInstance); return forward(exchange, url); } /*** forward request to backend service** @param exchange* @param url* @return*/ private Mono<Void> forward(ServerWebExchange exchange, String url) { ServerHttpRequest request = exchange.getRequest(); ServerHttpResponse response = exchange.getResponse(); HttpMethod method = request.getMethod(); WebClient.RequestBodySpec requestBodySpec = webClient.method(method).uri(url).headers((headers) -> { headers.addAll(request.getHeaders()); }); WebClient.RequestHeadersSpec<?> reqHeadersSpec; if (requireHttpBody(method)) { reqHeadersSpec = requestBodySpec.body(BodyInserters.fromDataBuffers(request.getBody())); } else { reqHeadersSpec = requestBodySpec; } // nio->callback->nio return reqHeadersSpec.exchange().timeout(Duration.ofMillis(properties.getTimeOutMillis())) .onErrorResume(ex -> { return Mono.defer(() -> { String errorResultJson = ""; if (ex instanceof TimeoutException) { errorResultJson = "{\"code\":5001,\"message\":\"network timeout\"}"; } else { errorResultJson = "{\"code\":5000,\"message\":\"system error\"}"; } return ShipResponseUtil.doResponse(exchange, errorResultJson); }).then(Mono.empty()); }).flatMap(backendResponse -> { response.setStatusCode(backendResponse.statusCode()); response.getHeaders().putAll(backendResponse.headers().asHttpHeaders()); return response.writeWith(backendResponse.bodyToFlux(DataBuffer.class)); }); } /*** weather the http method need http body** @param method* @return*/ private boolean requireHttpBody(HttpMethod method) { if (method.equals(HttpMethod.POST)| method.equals(HttpMethod.PUT)| method.equals(HttpMethod.PATCH)) { return true; } return false; } private String buildUrl(ServerWebExchange exchange, ServiceInstance serviceInstance) { ServerHttpRequest request = exchange.getRequest(); String query = request.getURI().getQuery(); String path = request.getPath().value().replaceFirst("/" + serviceInstance.getAppName(), ""); String url = "http://" + serviceInstance.getIp() + ":" + serviceInstance.getPort() + path; if (!StringUtils.isEmpty(query)) { url = url + "?" + query; } return url; } /*** choose an ServiceInstance according to route rule config and load balancing algorithm** @param appName* @param request* @return*/ private ServiceInstance chooseInstance(String appName, ServerHttpRequest request) { List<ServiceInstance> serviceInstances = ServiceCache.getAllInstances(appName); if (CollectionUtils.isEmpty(serviceInstances)) { LOGGER.error("service instance of {} not find", appName); throw new ShipException(ShipExceptionEnum.SERVICE_NOT_FIND); } String version = matchAppVersion(appName, request); if (StringUtils.isEmpty(version)) { throw new ShipException("match app version error"); } // filter serviceInstances by version List<ServiceInstance> instances = serviceInstances.stream().filter(i -> i.getVersion().equals(version)).collect(Collectors.toList()); //Select an instance based on the load balancing algorithm LoadBalance loadBalance = LoadBalanceFactory.getInstance(properties.getLoadBalance(), appName, version); ServiceInstance serviceInstance = loadBalance.chooseOne(instances); return serviceInstance; } private String matchAppVersion(String appName, ServerHttpRequest request) { List<AppRuleDTO> rules = RouteRuleCache.getRules(appName); rules.sort(Comparator.comparing(AppRuleDTO::getPriority).reversed()); for (AppRuleDTO rule : rules) { if (match(rule, request)) { return rule.getVersion(); } } return null; } private boolean match(AppRuleDTO rule, ServerHttpRequest request) { String matchObject = rule.getMatchObject(); String matchKey = rule.getMatchKey(); String matchRule = rule.getMatchRule(); Byte matchMethod = rule.getMatchMethod(); if (MatchObjectEnum.DEFAULT.getCode().equals(matchObject)) { return true; } else if (MatchObjectEnum.QUERY.getCode().equals(matchObject)) { String param = request.getQueryParams().getFirst(matchKey); if (!StringUtils.isEmpty(param)) { return StringTools.match(param, matchMethod, matchRule); } } else if (MatchObjectEnum.HEADER.getCode().equals(matchObject)) { HttpHeaders headers = request.getHeaders(); String headerValue = headers.getFirst(matchKey); if (!StringUtils.isEmpty(headerValue)) { return StringTools.match(headerValue, matchMethod, matchRule); } } return false; }}
3、数据同步
app数据同步文章源自JAVA秀-https://www.javaxiu.com/5348.html
后台服务(如订单服务)启动时,只将服务名,版本,ip地址和端口号注册到了Nacos,并没有实例的权重和启用的插件信息怎么办?文章源自JAVA秀-https://www.javaxiu.com/5348.html
一般在线的实例权重和插件列表都是在管理界面配置,然后动态生效的,所以需要ship-admin定时更新实例的权重和插件信息到注册中心。文章源自JAVA秀-https://www.javaxiu.com/5348.html
对应代码ship-admin的NacosSyncListener:文章源自JAVA秀-https://www.javaxiu.com/5348.html
* @Author: Ship* @Description:* @Date: Created in 2020/12/30*/@Configurationpublic class NacosSyncListener implements ApplicationListener<ContextRefreshedEvent> { private static final Logger LOGGER = LoggerFactory.getLogger(NacosSyncListener.class); private static ScheduledThreadPoolExecutor scheduledPool = new ScheduledThreadPoolExecutor(1, new ShipThreadFactory("nacos-sync", true).create()); @NacosInjected private NamingService namingService; @Value("${nacos.discovery.server-addr}") private String baseUrl; @Resource private AppService appService; @Override public void onApplicationEvent(ContextRefreshedEvent event) { if (event.getApplicationContext().getParent() != null) { return; } String url = "http://" + baseUrl + NacosConstants.INSTANCE_UPDATE_PATH; scheduledPool.scheduleWithFixedDelay(new NacosSyncTask(namingService, url, appService), 0, 30L, TimeUnit.SECONDS); } class NacosSyncTask implements Runnable { private NamingService namingService; private String url; private AppService appService; private Gson gson = new GsonBuilder().create(); public NacosSyncTask(NamingService namingService, String url, AppService appService) { this.namingService = namingService; this.url = url; this.appService = appService; } /*** Regular update weight,enabled plugins to nacos instance*/ @Override public void run() { try { // get all app names ListView<String> services = namingService.getServicesOfServer(1, Integer.MAX_VALUE, NacosConstants.APP_GROUP_NAME); if (CollectionUtils.isEmpty(services.getData())) { return; } List<String> appNames = services.getData(); List<AppInfoDTO> appInfos = appService.getAppInfos(appNames); for (AppInfoDTO appInfo : appInfos) { if (CollectionUtils.isEmpty(appInfo.getInstances())) { continue; } for (ServiceInstance instance : appInfo.getInstances()) { Map<String, Object> queryMap = buildQueryMap(appInfo, instance); String resp = OkhttpTool.doPut(url, queryMap, ""); LOGGER.debug("response :{}", resp); } } } catch (Exception e) { LOGGER.error("nacos sync task error", e); } } private Map<String, Object> buildQueryMap(AppInfoDTO appInfo, ServiceInstance instance) { Map<String, Object> map = new HashMap<>(); map.put("serviceName", appInfo.getAppName()); map.put("groupName", NacosConstants.APP_GROUP_NAME); map.put("ip", instance.getIp()); map.put("port", instance.getPort()); map.put("weight", instance.getWeight().doubleValue()); NacosMetadata metadata = new NacosMetadata(); metadata.setAppName(appInfo.getAppName()); metadata.setVersion(instance.getVersion()); metadata.setPlugins(String.join(",", appInfo.getEnabledPlugins())); map.put("metadata", StringTools.urlEncode(gson.toJson(metadata))); map.put("ephemeral", true); return map; } }}
ship-server再定时从Nacos拉取app数据更新到本地Map缓存。文章源自JAVA秀-https://www.javaxiu.com/5348.html
* @Author: Ship* @Description: sync data to local cache* @Date: Created in 2020/12/25*/@Configurationpublic class DataSyncTaskListener implements ApplicationListener<ContextRefreshedEvent> { private static ScheduledThreadPoolExecutor scheduledPool = new ScheduledThreadPoolExecutor(1, new ShipThreadFactory("service-sync", true).create()); @NacosInjected private NamingService namingService; @Autowired private ServerConfigProperties properties; @Override public void onApplicationEvent(ContextRefreshedEvent event) { if (event.getApplicationContext().getParent() != null) { return; } scheduledPool.scheduleWithFixedDelay(new DataSyncTask(namingService) , 0L, properties.getCacheRefreshInterval(), TimeUnit.SECONDS); WebsocketSyncCacheServer websocketSyncCacheServer = new WebsocketSyncCacheServer(properties.getWebSocketPort()); websocketSyncCacheServer.start(); } class DataSyncTask implements Runnable { private NamingService namingService; public DataSyncTask(NamingService namingService) { this.namingService = namingService; } @Override public void run() { try { // get all app names ListView<String> services = namingService.getServicesOfServer(1, Integer.MAX_VALUE, NacosConstants.APP_GROUP_NAME); if (CollectionUtils.isEmpty(services.getData())) { return; } List<String> appNames = services.getData(); // get all instances for (String appName : appNames) { List<Instance> instanceList = namingService.getAllInstances(appName, NacosConstants.APP_GROUP_NAME); if (CollectionUtils.isEmpty(instanceList)) { continue; } ServiceCache.add(appName, buildServiceInstances(instanceList)); List<String> pluginNames = getEnabledPlugins(instanceList); PluginCache.add(appName, pluginNames); } ServiceCache.removeExpired(appNames); PluginCache.removeExpired(appNames); } catch (NacosException e) { e.printStackTrace(); } } private List<String> getEnabledPlugins(List<Instance> instanceList) { Instance instance = instanceList.get(0); Map<String, String> metadata = instance.getMetadata(); // plugins: DynamicRoute,Auth String plugins = metadata.getOrDefault("plugins", ShipPluginEnum.DYNAMIC_ROUTE.getName()); return Arrays.stream(plugins.split(",")).collect(Collectors.toList()); } private List<ServiceInstance> buildServiceInstances(List<Instance> instanceList) { List<ServiceInstance> list = new LinkedList<>(); instanceList.forEach(instance -> { Map<String, String> metadata = instance.getMetadata(); ServiceInstance serviceInstance = new ServiceInstance(); serviceInstance.setAppName(metadata.get("appName")); serviceInstance.setIp(instance.getIp()); serviceInstance.setPort(instance.getPort()); serviceInstance.setVersion(metadata.get("version")); serviceInstance.setWeight((int) instance.getWeight()); list.add(serviceInstance); }); return list; } }}
路由规则数据同步文章源自JAVA秀-https://www.javaxiu.com/5348.html
同时,如果用户在管理后台更新了路由规则,ship-admin需要推送规则数据到ship-server,这里参考了soul网关的做法利用websocket在第一次建立连接后进行全量同步,此后路由规则发生变更就只作增量同步。文章源自JAVA秀-https://www.javaxiu.com/5348.html
服务端WebsocketSyncCacheServer:文章源自JAVA秀-https://www.javaxiu.com/5348.html
* @Author: Ship* @Description:* @Date: Created in 2020/12/28*/public class WebsocketSyncCacheServer extends WebSocketServer { private final static Logger LOGGER = LoggerFactory.getLogger(WebsocketSyncCacheServer.class); private Gson gson = new GsonBuilder().create(); private MessageHandler messageHandler; public WebsocketSyncCacheServer(Integer port) { super(new InetSocketAddress(port)); this.messageHandler = new MessageHandler(); } @Override public void onOpen(WebSocket webSocket, ClientHandshake clientHandshake) { LOGGER.info("server is open"); } @Override public void onClose(WebSocket webSocket, int i, String s, boolean b) { LOGGER.info("websocket server close..."); } @Override public void onMessage(WebSocket webSocket, String message) { LOGGER.info("websocket server receive message:\n[{}]", message); this.messageHandler.handler(message); } @Override public void onError(WebSocket webSocket, Exception e) { } @Override public void onStart() { LOGGER.info("websocket server start..."); } class MessageHandler { public void handler(String message) { RouteRuleOperationDTO operationDTO = gson.fromJson(message, RouteRuleOperationDTO.class); if (CollectionUtils.isEmpty(operationDTO.getRuleList())) { return; } Map<String, List<AppRuleDTO>> map = operationDTO.getRuleList() .stream().collect(Collectors.groupingBy(AppRuleDTO::getAppName)); if (OperationTypeEnum.INSERT.getCode().equals(operationDTO.getOperationType()) | OperationTypeEnum.UPDATE.getCode().equals(operationDTO.getOperationType())) { RouteRuleCache.add(map); } else if (OperationTypeEnum.DELETE.getCode().equals(operationDTO.getOperationType())) { RouteRuleCache.remove(map); } } }}
客户端WebsocketSyncCacheClient:文章源自JAVA秀-https://www.javaxiu.com/5348.html
* @Author: Ship* @Description:* @Date: Created in 2020/12/28*/@Componentpublic class WebsocketSyncCacheClient { private final static Logger LOGGER = LoggerFactory.getLogger(WebsocketSyncCacheClient.class); private WebSocketClient client; private RuleService ruleService; private Gson gson = new GsonBuilder().create(); public WebsocketSyncCacheClient(@Value("${ship.server-web-socket-url}") String serverWebSocketUrl,RuleService ruleService) { if (StringUtils.isEmpty(serverWebSocketUrl)) { throw new ShipException(ShipExceptionEnum.CONFIG_ERROR); } this.ruleService = ruleService; ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(1, new ShipThreadFactory("websocket-connect", true).create()); try { client = new WebSocketClient(new URI(serverWebSocketUrl)) { @Override public void onOpen(ServerHandshake serverHandshake) { LOGGER.info("client is open"); List<AppRuleDTO> list = ruleService.getEnabledRule(); String msg = gson.toJson(new RouteRuleOperationDTO(OperationTypeEnum.INSERT, list)); send(msg); } @Override public void onMessage(String s) { } @Override public void onClose(int i, String s, boolean b) { } @Override public void onError(Exception e) { LOGGER.error("websocket client error", e); } }; client.connectBlocking(); //使用调度线程池进行断线重连,30秒进行一次 executor.scheduleAtFixedRate(() -> { if (client != null && client.isClosed()) { try { client.reconnectBlocking(); } catch (InterruptedException e) { LOGGER.error("reconnect server fail", e); } } }, 10, 30, TimeUnit.SECONDS); } catch (Exception e) { LOGGER.error("websocket sync cache exception", e); throw new ShipException(e.getMessage()); } } public <T> void send(T t) { while (!client.getReadyState().equals(ReadyState.OPEN)) { LOGGER.debug("connecting ...please wait"); } client.send(gson.toJson(t)); }}
文章源自JAVA秀-https://www.javaxiu.com/5348.html
- 测试 -文章源自JAVA秀-https://www.javaxiu.com/5348.html
1、动态路由测试
本地启动nacos ,sh startup.sh -m standalone;文章源自JAVA秀-https://www.javaxiu.com/5348.html
启动ship-admin;文章源自JAVA秀-https://www.javaxiu.com/5348.html
本地启动两个ship-example实例。文章源自JAVA秀-https://www.javaxiu.com/5348.html
实例1配置:文章源自JAVA秀-https://www.javaxiu.com/5348.html
ship: http: app-name: order version: gray_1.0 context-path: /order port: 8081 admin-url: 127.0.0.1:9001 server: port: 8081 nacos: discovery: server-addr: 127.0.0.1:8848
实例2配置:文章源自JAVA秀-https://www.javaxiu.com/5348.html
ship: http: app-name: order version: prod_1.0 context-path: /order port: 8082 admin-url: 127.0.0.1:9001 server: port: 8082 nacos: discovery: server-addr: 127.0.0.1:8848
在数据库添加路由规则配置,该规则表示当http header 中的name=ship时请求路由到gray_1.0版本的节点。文章源自JAVA秀-https://www.javaxiu.com/5348.html
文章源自JAVA秀-https://www.javaxiu.com/5348.html
启动ship-server,看到以下日志时则可以进行测试了。文章源自JAVA秀-https://www.javaxiu.com/5348.html
2021-01-02 19:57:09.159 INFO 30413 --- [SocketWorker-29] cn.sp.sync.WebsocketSyncCacheServer : websocket server receive message: [{"operationType":"INSERT","ruleList":[{"id":1,"appId":5,"appName":"order","version":"gray_1.0","matchObject":"HEADER","matchKey":"name","matchMethod":1,"matchRule":"ship","priority":50}]}]
用Postman请求http://localhost:9000/order/user/add
,POST方式,header设置name=ship,可以看到只有实例1有日志显示。文章源自JAVA秀-https://www.javaxiu.com/5348.html
==========add user,version:gray_1.0
2、性能压测
压测环境:文章源自JAVA秀-https://www.javaxiu.com/5348.html
MacBook Pro 13英寸文章源自JAVA秀-https://www.javaxiu.com/5348.html
处理器 2.3 GHz 四核Intel Core i7文章源自JAVA秀-https://www.javaxiu.com/5348.html
内存 16 GB 3733 MHz LPDDR4X文章源自JAVA秀-https://www.javaxiu.com/5348.html
后端节点个数一个文章源自JAVA秀-https://www.javaxiu.com/5348.html
压测工具:wrk文章源自JAVA秀-https://www.javaxiu.com/5348.html
压测结果:20个线程,500个连接数,吞吐量大概每秒9400个请求。文章源自JAVA秀-https://www.javaxiu.com/5348.html
文章源自JAVA秀-https://www.javaxiu.com/5348.html
压测结果文章源自JAVA秀-https://www.javaxiu.com/5348.html
文章源自JAVA秀-https://www.javaxiu.com/5348.html
- 总结 -文章源自JAVA秀-https://www.javaxiu.com/5348.html
千里之行始于足下,开始以为写一个网关会很难,但当你实际开始行动时就会发现其实没那么难,所以迈出第一步很重要。过程中也遇到了很多问题,还在github上给soul和nacos这两个开源项目提了两个issue,后来发现是自己的问题,尴尬。文章源自JAVA秀-https://www.javaxiu.com/5348.html
本文代码已全部上传到:https://github.com/2YSP/ship-gate 。文章源自JAVA秀-https://www.javaxiu.com/5348.html
内容来源于网络,版权归原作者所有。文章源自JAVA秀-https://www.javaxiu.com/5348.html
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明天见(。・ω・。)ノ♡文章源自JAVA秀-https://www.javaxiu.com/5348.html

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