Nginx Ingress controller- Path based routing - nginx

Question

i am running an Nginx ingress controller and wanted to allow only few path for users to connect and rest all I wanted to block or provide an 403 error. how can i do that?
I only wanted users to allow to connect /example and rest all should be blocked.
kind: Ingress
metadata:
name: ingress1
annotations:
kubernetes.io/ingress.class: nginx
spec:
rules:
- host: ingress.example.com
http:
paths:
- path: /example
backend:
serviceName: ingress-svc
servicePort: 80
Can i add a nginx server-snippet?
location path {
"if the path is not matching then deny"
deny all;
}```

Answer 1

Make a custom backend using below
apiVersion: apps/v1
kind: Deployment
metadata:
name: custom-http-backend
spec:
selector:
matchLabels:
app: custom-http-backend
template:
metadata:
labels:
app: custom-http-backend
spec:
containers:
- name: custom-http-backend
image: inanimate/echo-server
ports:
- name: http
containerPort: 8080
imagePullPolicy: IfNotPresent
---
apiVersion: v1
kind: Service
metadata:
name: custom-http-backend
spec:
selector:
app: custom-http-backend
ports:
- protocol: TCP
port: 80
targetPort: 8080
Then in your ingress add this rule
- host: ingress.example.com
http:
paths:
- path: /
backend:
serviceName: custom-http-backend
servicePort: 80

Answer 2

Additionally to what #Tarun Khosla mentioned which is correct, there is another stackoverflow question with examples which might be helpful. I am posting this as a community wiki answer for better visibility for the community, feel free to expand on it.
There are 2 examples provided by #Nick Rak
I’ve faced the same issue and found the solution on github.
To achieve your goal, you need to create two Ingresses first by default without any restriction:
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: ingress-test
spec:
rules:
- host: host.host.com
http:
paths:
- path: /service-mapping
backend:
serviceName: /service-mapping
servicePort: 9042
Then, create a secret for auth as described in the doc:
Creating the htpasswd
$ htpasswd -c auth foo
New password: <bar>
New password:
Re-type new password:
Adding password for user foo
Creating the secret:
$ kubectl create secret generic basic-auth --from-file=auth
secret "basic-auth" created
Second Ingress with auth for paths which you need to restrict:
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: ingress-with-auth
annotations:
# type of authentication
nginx.ingress.kubernetes.io/auth-type: basic
# name of the secret that contains the user/password definitions
nginx.ingress.kubernetes.io/auth-secret: basic-auth
# message to display with an appropiate context why the authentication is required
nginx.ingress.kubernetes.io/auth-realm: "Authentication Required - foo"
spec:
rules:
- host: host.host.com
http:
paths:
- path: /admin
backend:
serviceName: service_name
servicePort: 80
According to sedooe answer, his solution may have some issues.
and #sedooe
You can use server-snippet annotation. This seems like exactly what you want to achieve.