Zero Scaling for Service behind a proxy

[kaufmo]

Hello,
I hope some can help me?

My Use Case: (Kubernetes: 1.33, http-add-on: 0.11.1)
I'm trying to enable keda with http-addon on all my non-prod projects to enable zero scaling support.
Many of this Applications have the same setup

Nginx Ingress Controller with one Public Host, this Host points into an oauth2-proxy. Inside the proxy I have 2 upstreams one for a nodejs api and one for a reactjs admin

What I've done now is I created a ExternalName Service and my Ingress points to that. This is already working fine my oauth2-proxy is scaling perfectly. I also create 2 separate ExternalName Services one for api and one for admin so I've two different hosts which i can manage to use inside my httpScaledObject. But my problem now is I'm always getting an "bad gateway" error from keda. my proxy cannot access these backends via the service. When I look into the intercepter I'm getting the error below, nd my services cannot scale only the proxy.

Can someone help me? Do you need more Informations?

Error:

keda-add-ons-http-interceptor-75755b9dc9-khnvz 2025-10-22T14:24:00Z    ERROR    LoggingMiddleware.RoutingMiddleware.CountingMiddleware.UpstreamHandler.StaticHandler    Bad Gateway    {"routingKey": "//xxx", "namespacedName": {"name":"xxx","namespace":"xxx"}, "stream":  │
│ "http://xxx/api", "error": "context canceled"}                                                                                                                                                                                                                                                                     │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz github.com/kedacore/http-add-on/interceptor/handler.(*Static).ServeHTTP                                                                                                                                                                                                                                                         │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz     github.com/kedacore/http-add-on/interceptor/handler/static.go:36                                                                                                                                                                                                                                                            │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz github.com/kedacore/http-add-on/interceptor/handler.(*Upstream).ServeHTTP.func2                                                                                                                                                                                                                                                 │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz     github.com/kedacore/http-add-on/interceptor/handler/upstream.go:83                                                                                                                                                                                                                                                          │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz net/http/httputil.(*ReverseProxy).ServeHTTP                                                                                                                                                                                                                                                                                     │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz     net/http/httputil/reverseproxy.go:486                                                                                                                                                                                                                                                                                       │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz github.com/kedacore/http-add-on/interceptor/handler.(*Upstream).ServeHTTP                                                                                                                                                                                                                                                       │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz     github.com/kedacore/http-add-on/interceptor/handler/upstream.go:86                                                                                                                                                                                                                                                          │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz main.runProxyServer.newForwardingHandler.func2                                                                                                                                                                                                                                                                                  │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz     github.com/kedacore/http-add-on/interceptor/proxy_handlers.go:118                                                                                                                                                                                                                                                           │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz net/http.HandlerFunc.ServeHTTP                                                                                                                                                                                                                                                                                                  │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz     net/http/server.go:2294                                                                                                                                                                                                                                                                                                     │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz github.com/kedacore/http-add-on/interceptor/middleware.(*Counting).ServeHTTP                                                                                                                                                                                                                                                    │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz     github.com/kedacore/http-add-on/interceptor/middleware/counting.go:35                                                                                                                                                                                                                                                       │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz github.com/kedacore/http-add-on/interceptor/middleware.(*Routing).ServeHTTP                                                                                                                                                                                                                                                     │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz     github.com/kedacore/http-add-on/interceptor/middleware/routing.go:79                                                                                                                                                                                                                                                        │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz github.com/kedacore/http-add-on/interceptor/middleware.(*Logging).ServeHTTP                                                                                                                                                                                                                                                     │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz     github.com/kedacore/http-add-on/interceptor/middleware/logging.go:42                                                                                                                                                                                                                                                        │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz github.com/kedacore/http-add-on/interceptor/middleware.(*Metrics).ServeHTTP                                                                                                                                                                                                                                                     │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz     github.com/kedacore/http-add-on/interceptor/middleware/metrics.go:24                                                                                                                                                                                                                                                        │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz net/http.serverHandler.ServeHTTP                                                                                                                                                                                                                                                                                                │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz     net/http/server.go:3301                                                                                                                                                                                                                                                                                                     │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz net/http.(*conn).serve                                                                                                                                                                                                                                                                                                          │
│ keda-add-ons-http-interceptor-75755b9dc9-khnvz     net/http/server.go:2102