Is it possible to configure an ingress controller in Kubernetes to route the HTTP requests to a service only if the incoming requests have a certain value for a header?
Example
An HTTP request with following header
X-MY-CUSTOM-HEADER: accepted-valueshould be forwarded to service1
An HTTP request with following header
X-MY-CUSTOM-HEADER: invalid-valueshould be blocked
If is possible could you detail a bit or point to some documentation as I wasn't able to find documentation for such usecase
Traefik 2.0, Istio and Ambassador support Header based routing.
More information from https://discuss.kubernetes.io/t/header-based-ingress-routing/6322
If you are using an nginx ingress controller you can do it with a Configuration snippet annotation. Then you can add something like this:
nginx.ingress.kubernetes.io/configuration-snippet: |
map $http_x_custom_header $not_ok {
default "1";
Value1 "0";
Value2 "0";
Value3 "0";
}
if ($not_ok) {
return 403;
}
Some more info here.