Support custom service name and port in ingress paths

Allow specifying serviceName and servicePort per path in ingress
configuration. Handles both numeric and string port types for K8s
versions with different backend formats.

Author: Tonio

deploy/charts/litellm-helm/templates/ingress.yaml

@@ -49,12 +49,20 @@ spec:
             backend:
               {{- if semverCompare ">=1.19-0" $.Capabilities.KubeVersion.GitVersion }}
               service:
-                name: {{ $fullName }}
+                name: {{ hasKey . "serviceName" | ternary .serviceName $fullName }}
                 port:
+                {{- if hasKey . "servicePort" }}
+                  {{- if has (typeOf .servicePort) (list "int" "float64") }}
+                  number: {{ .servicePort }}
+                  {{- else }}
+                  name: {{ .servicePort }}
+                  {{- end }}
+                {{- else }}
                   number: {{ $svcPort }}
+                {{- end }}
               {{- else }}
-              serviceName: {{ $fullName }}
-              servicePort: {{ $svcPort }}
+              serviceName: {{ hasKey . "serviceName" | ternary .serviceName $fullName }}
+              servicePort: {{ hasKey . "servicePort" | ternary .servicePort $svcPort }}
               {{- end }}
           {{- end }}
     {{- end }}