How to get which url redirect to default backend

[lw8008]

Is this a request for help? (If yes, you should use our troubleshooting guide and community support channels, see https://kubernetes.io/docs/tasks/debug-application-cluster/troubleshooting/.):

What keywords did you search in NGINX Ingress controller issues before filing this one? (If you have found any duplicates, you should instead reply there.):

---

Is this a BUG REPORT or FEATURE REQUEST? (choose one):
FEATURE REQUEST

NGINX Ingress controller version:
nginx-ingress-controller:0.18.0

startup conf:
args:
- /nginx-ingress-controller
- --default-backend-service=$(POD_NAMESPACE)/default-http-backend
...

Kubernetes version (use kubectl version):
1.11.1

Environment:
Private Data Center

• Cloud provider or hardware configuration:
• OS (e.g. from /etc/os-release):
• Kernel (e.g. uname -a):
• Install tools:
• Others:

What happened:
It sems i can't get those access which redirect to default backend since no endpoint added in both access.log and error.log of Ingress.

What you expected to happen:
Could you pls guide me if i need additional config in Ingress or not support by default and need use my own default backend to log this?

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know:

[aledbf]

@lw8008 I am sorry but what are you trying to do exactly?

[lw8008]

@aledbf thanks for your quick response.
for example, if ingress get access with URL abc.test.com.
but we don't config any ingress to serve this request, then it will go to default-backend-service.
but seems such kind of redirect will not log in access.log or error.log, right?

if i want to get those "invalid" access url, what's your suggestion?

[aledbf]

@lw8008 that is correct. You will see a 404 in the log but no redirect because there is no one. When there is no endpoints, the controller replaces the service with default backend

[lw8008]

Thank @aledbf

But it seems i can't get 404 in the access.log for those access replaces with default backend.

Here is my nginx-ingress-controller:0.18.0 startup parameter:
args:
- /nginx-ingress-controller
- --default-backend-service=$(POD_NAMESPACE)/default-http-backend
- --configmap=$(POD_NAMESPACE)/nginx-configuration
- --tcp-services-configmap=$(POD_NAMESPACE)/tcp-services
- --udp-services-configmap=$(POD_NAMESPACE)/udp-services
- --publish-service=$(POD_NAMESPACE)/ingress-nginx-default
- --annotations-prefix=nginx.ingress.kubernetes.io
- --logtostderr=false
- --alsologtostderr=true
- --log_dir=/var/log/nginx
- --healthz-port=23254
- --http-port=23000
- --https-port=23443
- --watch-namespace=
- --ingress-class=default

i'm wondering if i miss some config?