SpringCloud Gateway使用redis实现动态路由的方法
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2022-06-19 09:47:12
1. 将 actuator 端点暴露出来management:endpoints:web:exposure:include: "*"2. redis 配置3. 将原内存路由持久化到 redis@com...
1. 将 actuator 端点暴露出来
management:
endpoints:
web:
exposure:
include: "*"
2. redis 配置
3. 将原内存路由持久化到 redis
@component public class redisroutedefinitionrepository implements routedefinitionrepository { /** * hash存储的key */ public static final string gateway_routes = "gateway_dynamic_route"; @resource private stringredistemplate redistemplate; /** * 获取路由信息 * @return */ @override public flux<routedefinition> getroutedefinitions() { list<routedefinition> routedefinitions = new arraylist<>(); redistemplate.opsforhash().values(gateway_routes).stream() .foreach(routedefinition -> routedefinitions.add(json.parseobject(routedefinition.tostring(), routedefinition.class))); return flux.fromiterable(routedefinitions); } @override public mono<void> save(mono<routedefinition> route) { return route.flatmap(routedefinition -> { redistemplate.opsforhash().put(gateway_routes, routedefinition.getid(), jsonobject.tojsonstring(routedefinition)); return mono.empty(); }); } @override public mono<void> delete(mono<string> routeid) { return routeid.flatmap(id -> { if (redistemplate.opsforhash().haskey(gateway_routes, id)) { redistemplate.opsforhash().delete(gateway_routes, id); return mono.empty(); } return mono.defer(() -> mono.error(new notfoundexception("route definition is not found, routeid:" + routeid))); }); } }
4. 重写动态路由服务
@service public class gatewaydynamicrouteservice implements applicationeventpublisheraware { @resource private redisroutedefinitionrepository redisroutedefinitionrepository; private applicationeventpublisher applicationeventpublisher; /** * 增加路由 * @param routedefinition * @return */ public int add(routedefinition routedefinition) { redisroutedefinitionrepository.save(mono.just(routedefinition)).subscribe(); applicationeventpublisher.publishevent(new refreshroutesevent(this)); return 1; } /** * 更新 * @param routedefinition * @return */ public int update(routedefinition routedefinition) { redisroutedefinitionrepository.delete(mono.just(routedefinition.getid())); redisroutedefinitionrepository.save(mono.just(routedefinition)).subscribe(); applicationeventpublisher.publishevent(new refreshroutesevent(this)); return 1; } /** * 删除 * @param id * @return */ public mono<responseentity<object>> delete(string id) { return redisroutedefinitionrepository.delete(mono.just(id)).then(mono.defer(() -> mono.just(responseentity.ok().build()))) .onerrorresume(t -> t instanceof notfoundexception, t -> mono.just(responseentity.notfound().build())); } @override public void setapplicationeventpublisher(applicationeventpublisher applicationeventpublisher) { this.applicationeventpublisher = applicationeventpublisher; } }
5. 对外暴露接口
@restcontroller @requestmapping("/gateway") public class gatewaydynamicroutecontroller { @resource private gatewaydynamicrouteservice gatewaydynamicrouteservice; @postmapping("/add") public string create(@requestbody routedefinition entity) { int result = gatewaydynamicrouteservice.add(entity); return string.valueof(result); } @postmapping("/update") public string update(@requestbody routedefinition entity) { int result = gatewaydynamicrouteservice.update(entity); return string.valueof(result); } @deletemapping("/delete/{id}") public mono<responseentity<object>> delete(@pathvariable string id) { return gatewaydynamicrouteservice.delete(id); } }
测试
测试前删除我们配置的静态路由,因为静态路由和 redis 动态路由同时存在时取并集。
访问 http://localhost:2000/actuator/gateway/routes , 可以看到只有默认路由。
[ { "route_id": "compositediscoveryclient_consul", "route_definition": { "id": "compositediscoveryclient_consul", "predicates": [ { "name": "path", "args": { "pattern": "/consul/**" } } ], "filters": [ { "name": "rewritepath", "args": { "regexp": "/consul/(?<remaining>.*)", "replacement": "/${remaining}" } } ], "uri": "lb://consul", "order": 0 }, "order": 0 }, { "route_id": "compositediscoveryclient_idc-gateway", "route_definition": { "id": "compositediscoveryclient_idc-gateway", "predicates": [ { "name": "path", "args": { "pattern": "/idc-gateway/**" } } ], "filters": [ { "name": "rewritepath", "args": { "regexp": "/idc-gateway/(?<remaining>.*)", "replacement": "/${remaining}" } } ], "uri": "lb://idc-gateway", "order": 0 }, "order": 0 }, { "route_id": "compositediscoveryclient_idc-provider1", "route_definition": { "id": "compositediscoveryclient_idc-provider1", "predicates": [ { "name": "path", "args": { "pattern": "/idc-provider1/**" } } ], "filters": [ { "name": "rewritepath", "args": { "regexp": "/idc-provider1/(?<remaining>.*)", "replacement": "/${remaining}" } } ], "uri": "lb://idc-provider1", "order": 0 }, "order": 0 }, { "route_id": "compositediscoveryclient_idc-provider2", "route_definition": { "id": "compositediscoveryclient_idc-provider2", "predicates": [ { "name": "path", "args": { "pattern": "/idc-provider2/**" } } ], "filters": [ { "name": "rewritepath", "args": { "regexp": "/idc-provider2/(?<remaining>.*)", "replacement": "/${remaining}" } } ], "uri": "lb://idc-provider2", "order": 0 }, "order": 0 } ]
这个时候访问 http://192.168.124.5:2000/idc-provider1/provider1/1 根据结果可以推测能正确路由到 provider1, 测试结果一致。
创建 provider1 路由,将路径设置为 /p1/**,测试是否生效。
post 请求 http://localhost:2000/gateway/add
{ "id":"provider1", "predicates":[ { "name":"path", "args":{ "_genkey_0":"/p1/**" } }, { "name":"remoteaddr", "args":{ "_genkey_0":"192.168.124.5/16" } } ], "filters":[ { "name":"stripprefix", "args":{ "_genkey_0":"1" } } ], "uri":"lb://idc-provider1", "order":0 }
查看 redis 存储,或者请求 http://localhost:2000/actuator/gateway/routes , 都可以看到配置成功。
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