我有一个正在运行并使用spring云网关的spring引导应用程序。该应用程序在kubernetes上运行(在EKS和本地docker桌面上试用)。我在访问指向另一个命名空间(非默认)中的服务的路由时遇到了麻烦。当我启动http://localhost:8080/actuator/gateway/routes时，我看到下面的路由是其中一条
{
predicate: "Paths: [/my-app/**], match trailing slash: true",
metadata: {
port.http: "8080",
k8s_namespace: "customns",
app.kubernetes.io/name: "my-app",
spring-boot: "yes",
kubectl.kubernetes.io/last-applied-configuration: "{"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"labels":{"app.kubernetes.io/name":"my-app","platform":"no","spring-boot":"yes"},"name":"my-app","namespace":"customns"},"spec":{"ports":[{"name":"http","port":8082,"targetPort":8080}],"selector":{"app.kubernetes.io/name":"my-app"},"type":"LoadBalancer"}} ",
platform: "no"
},
route_id: "ReactiveCompositeDiscoveryClient_my-app",
filters: [
"[[RewritePath /my-app/(?<remaining>.*) = '/${remaining}'], order = 1]"
],
uri: "lb://my-app",
order: 0
}
在应用程序中。我已经添加了下面的网关路由
spring:
main:
banner-mode: off
cloud:
kubernetes:
discovery:
enabled: true
all-namespaces: true
gateway:
discovery:
locator:
enabled: true
lower-case-service-id: true
metrics:
enabled: true
routes:
- id: my-app
uri: lb://my-app
predicates:
- Path=/my-custom-url/**
filters:
- RewritePath=/my-custom-url(?<segment>/?.*), ${segment}
然而，当我启动http://localhost:8080/my-app或http://localhost:8080/my-custom-url时，我得到如下错误
2021-03-04 16:18:24.201 ERROR [my-gateway-service,,] 1 --- [or-http-epoll-4] a.w.r.e.AbstractErrorWebExceptionHandler : [9a85e6b2-7] 500 Server Error for HTTP GET "/my-app"
java.lang.IllegalArgumentException: The path does not have a leading slash.
at org.springframework.util.Assert.isTrue(Assert.java:121) ~[spring-core-5.3.3.jar:5.3.3]
Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
|_ checkpoint ⇢ org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.authorization.AuthorizationWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.authorization.ExceptionTranslationWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.authentication.logout.LogoutWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.savedrequest.ServerRequestCacheWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.context.SecurityContextServerWebExchangeWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.ui.LogoutPageGeneratingWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.ui.LoginPageGeneratingWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.oauth2.client.web.server.authentication.OAuth2LoginAuthenticationWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.oauth2.client.web.server.OAuth2AuthorizationRequestRedirectWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.context.ReactorContextWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.header.HttpHeaderWriterWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.config.web.server.ServerHttpSecurity$ServerWebExchangeReactorContextWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.WebFilterChainProxy [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.cloud.sleuth.instrument.web.TraceWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.boot.actuate.metrics.web.reactive.server.MetricsWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ HTTP GET "/my-app" [ExceptionHandlingWebHandler]
Stack trace:
at org.springframework.util.Assert.isTrue(Assert.java:121) ~[spring-core-5.3.3.jar:5.3.3]
at org.springframework.http.server.reactive.DefaultServerHttpRequestBuilder.path(DefaultServerHttpRequestBuilder.java:95) ~[spring-web-5.3.3.jar:5.3.3]
at org.springframework.cloud.gateway.filter.factory.RewritePathGatewayFilterFactory$1.filter(RewritePathGatewayFilterFactory.java:70) ~[spring-cloud-gateway-server-3.0.0.jar:3.0.0]
at org.springframework.cloud.gateway.filter.OrderedGatewayFilter.filter(OrderedGatewayFilter.java:44) ~[spring-cloud-gateway-server-3.0.0.jar:3.0.0]
at org.springframework.cloud.gateway.handler.FilteringWebHandler$DefaultGatewayFilterChain.lambda$filter$0(FilteringWebHandler.java:117) ~[spring-cloud-gateway-server-3.0.0.jar:3.0.0]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:44) ~[reactor-core-3.4.2.jar:3.4.2]
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.2.jar:3.4.2]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.2.jar:3.4.2]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.2.jar:3.4.2]
at reactor.core.publisher.Mono.subscribe(Mono.java:4046) ~[reactor-core-3.4.2.jar:3.4.2]
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:173) ~[reactor-core-3.4.2.jar:3.4.2]
at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) ~[reactor-core-3.4.2.jar:3.4.2]
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.2.jar:3.4.2]
:
:
:
at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436) ~[netty-transport-4.1.58.Final.jar:4.1.58.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) ~[netty-codec-4.1.58.Final.jar:4.1.58.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) ~[netty-codec-4.1.58.Final.jar:4.1.58.Final]
at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251) ~[netty-transport-4.1.58.Final.jar:4.1.58.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.58.Final.jar:4.1.58.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.58.Final.jar:4.1.58.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.58.Final.jar:4.1.58.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.58.Final.jar:4.1.58.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.58.Final.jar:4.1.58.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.58.Final.jar:4.1.58.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.58.Final.jar:4.1.58.Final]
at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:795) ~[netty-transport-native-epoll-4.1.58.Final-linux-x86_64.jar:4.1.58.Final]
at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:480) ~[netty-transport-native-epoll-4.1.58.Final-linux-x86_64.jar:4.1.58.Final]
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378) ~[netty-transport-native-epoll-4.1.58.Final-linux-x86_64.jar:4.1.58.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) ~[netty-common-4.1.58.Final.jar:4.1.58.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.58.Final.jar:4.1.58.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.58.Final.jar:4.1.58.Final]
at java.base/java.lang.Thread.run(Unknown Source) ~[na:na]
我的问题是如何使spring云网关路由到另一个命名空间中的服务?
尝试以下更改
-
在定义路由时不需要启用网关发现
-
还可以更改过滤器正则表达式的使用，如下所示。
RewritePath =/my-custom-url (?& lt;Segment>.*)，/$ {Segment}
- 如果不工作，请更改路由url，如下所示。
http://
: & lt; port_no .>/my-custom-url/* *