configs to reproduce issue when istio routing starts to fail for outbound requests if url length exceeds a certain limit
- ingressgateway -> app1 -> app2
- app1 and app2 each consists of a virtualservice, service, and deployment[nginx].
- app1 receives request from ingressgateway pods, adds host header "service-deployment2" and forward request to app2.
- app2 has 2 deployments[v1 and v2] and based on queryparam "version", it redirects requests to either v1 pods or v2 pods.
- response indicates which pod request was served from.
###Prerequisites
- istio-operator installed and should be listining to istio-operator namespace, this is to create ingressgateway pods.
- you can also use istioctl to apply ingress gateway configs.
###How to reproduce
-
Run
kubectl apply -f ./istio_issue
to deploy configs -
run
kubectl -n istio-test port-forward svc/istio-ingressgateway 8080:80
to port forward into istio gateway pods. -
hit following query and notice that response will be deployment2-v1 always as version=v1 is present in request and requests are served from v1 pods
http://localhost:8080/dfdf?version=v1
-
hit following query and notice that response will be deployment2-v2 always as version=v2 is present in request and requests are served from v2 pods
http://localhost:8080/dfdf?version=v2
-
Hit following query which is 8200 characters long and notice that response will be load balanced between v1 and v2 pods of deployment2 irrespective of what version is passed
http://localhost:8080/dfdf?version=v1&longvalparam=verylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylongstringverylon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