Spring cloud: Ribbon and HTTPS

Question

We want to use HTTPS for our microservices communication based on Feign and Ribbon. The services are based on spring boot and tomcat is correctly setup. The instances are registered with the HTTPS URL and securePort enabled on Eureka. However, when we call another microservice via Feign then the underlying Ribbon doesn't recognizes the protocol and falls back to HTTP. I could solve that problem by adding the protocol to the FeignClient annotation like this:

    @FeignClient("https://users")

But it seem that the Zuul proxy and the Hystrix/Turbine which are also using Ribbon internally have the same HTTP fallback problem. Is there any way to configure Ribbon centrally to use HTTPS as default or use the securePort setting of the registred eureka instance?

Eureka instance configuration:

eureka.instance.hostname=localhost
eureka.instance.securePort = ${server.port}
eureka.instance.securePortEnabled = true  
eureka.instance.nonSecurePortEnabled = false 
eureka.instance.metadataMap.hostname = ${eureka.instance.hostname}
eureka.instance.metadataMap.securePort = ${server.port}
eureka.instance.homePageUrl = https://${eureka.instance.hostname}:${server.port}/
eureka.instance.statusPageUrl = https://${eureka.instance.hostname}:${server.port}/admin/info

With these settings it looks in Eureka like the service runs on HTTPS. The Zuul proxy runs fine, but uses the HTTP URL to call the service. You have to enable SSL in Spring Boots embedded Tomcat by providing a server certificate in a keystore:

server.ssl.key-store=server.jks
server.ssl.key-store-password=<pw>
server.ssl.keyStoreType=jks
server.ssl.keyAlias=tomcat
server.ssl.key-password=<pw> 

Tomcat than only runs on HTTPS and the HTTP port is blocked, but than I get: localhost:8081 failed to respond because a HTTP URL is used to call the service. By setting ribbon.IsSecure=true the users service url is correctly generated, but the Ribbon loadbalancer fails to lookup the users service in Eureka: Load balancer does not have available server for client: users. I aslo tried to set users.ribbon.IsSecure=true in the zuul proxy only, but still get the same error.

Caused by: com.netflix.client.ClientException: Load balancer does not have available server for client: user
at com.netflix.loadbalancer.LoadBalancerContext.getServerFromLoadBalancer(LoadBalancerContext.java:468)
at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:184)
at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:180)
at rx.Observable$1.call(Observable.java:145)
at rx.Observable$1.call(Observable.java:137)
at rx.Observable$1.call(Observable.java:145)
at rx.Observable$1.call(Observable.java:137)
at rx.Observable.unsafeSubscribe(Observable.java:7304)
at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber$1.call(OperatorRetryWithPredicate.java:112)
at rx.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.enqueue(TrampolineScheduler.java:81)
at rx.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.schedule(TrampolineScheduler.java:59)
at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:77)
at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:45)
at rx.internal.util.ScalarSynchronousObservable$1.call(ScalarSynchronousObservable.java:41)
at rx.internal.util.ScalarSynchronousObservable$1.call(ScalarSynchronousObservable.java:30)
at rx.Observable$1.call(Observable.java:145)
at rx.Observable$1.call(Observable.java:137)
at rx.Observable$1.call(Observable.java:145)
at rx.Observable$1.call(Observable.java:137)
at rx.Observable$1.call(Observable.java:145)
at rx.Observable$1.call(Observable.java:137)
at rx.Observable.subscribe(Observable.java:7393)
at rx.observables.BlockingObservable.blockForSingle(BlockingObservable.java:441)
at rx.observables.BlockingObservable.single(BlockingObservable.java:340)
at com.netflix.client.AbstractLoadBalancerAwareClient.executeWithLoadBalancer(AbstractLoadBalancerAwareClient.java:102)
at com.netflix.client.AbstractLoadBalancerAwareClient.executeWithLoadBalancer(AbstractLoadBalancerAwareClient.java:81)
at org.springframework.cloud.netflix.zuul.filters.route.RibbonCommand.forward(RibbonCommand.java:129)
at org.springframework.cloud.netflix.zuul.filters.route.RibbonCommand.run(RibbonCommand.java:103)
at org.springframework.cloud.netflix.zuul.filters.route.RibbonCommand.run(RibbonCommand.java:1)
at com.netflix.hystrix.HystrixCommand$1.call(HystrixCommand.java:298)

Answer 1

We solved the zuul proxy problem now by setting

ribbon.IsSecure=true
eureka.instance.secureVirtualHostName=${spring.application.name}

so that all services are also in the secure virtual hosts pool in com.netflix.discovery.shared.Applications. That helps the discovery process to find the instances in eureka.

However, the Hystrix dashboard has still a similar problem