Configure Kubernetes Traefik Ingress with different path rewrites for each service - nginx

Question

I'm in the process of migration of our application from single instance Docker-compose configuration to Kubernetes. I currently have the following example NGINX configuration, running as a reverse proxy of my application:
server {
server_name example.com;
ssl_certificate /etc/nginx/certs/${CERT_NAME};
ssl_certificate_key /etc/nginx/certs/${KEY_NAME};
listen 443 ssl;
keepalive_timeout 70;
access_log /var/log/nginx/access.log mtail;
ssl_protocols xxxxxx
ssl_ciphers xxxxxx
ssl_session_cache shared:SSL:10m;
ssl_session_timeout 10m;
rewrite_log on;
resolver 127.0.0.11 ipv6=off;
location /push/ {
auth_basic "Restricted";
auth_basic_user_file /etc/nginx/htpasswd;
rewrite /push/(.*) /index.php/$1 break;
proxy_pass pushinterface:3080;
}
location /flights/ {
rewrite /flights/(.*) /$1 break;
proxy_pass flightstats:3090;
}
location /api/ {
proxy_pass $api;
}
location /grafana/ {
access_log off;
log_not_found off;
proxy_pass http://grafana:3000;
rewrite ^/grafana/(.*) /$1 break;
}
}
My initial plans for the reverse proxy part was implementing an ingress with NGINX ingress controller, but I saw that my configuration can be created as Ingress only with NGINX Plus. That's why I decided to try with Traefik, but I'm not sure if it's still possible to have different rewrites of the path for each service.
I tried the following Ingress configuration, but it seems it's not working:
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: example-traefik
annotations:
kubernetes.io/ingress.class: traefik
traefik.frontend.rule.type: ReplacePathRegex
spec:
rules:
- host: example.com
http:
paths:
- backend:
serviceName: pushinterface
servicePort: 80
path: /push/(.*) /index/$1
- backend:
serviceName: flights
servicePort: 80
path: /flights/(.*) /$1
- backend:
serviceName: api
servicePort: 80
path: /api
- backend:
serviceName: grafana
servicePort: 80
path: /grafana/(.*) /$1
I will appreciate any help for solving this task

Answer 1

After several hours of unsuccessful attempts to solve my issue, I did it with Nginx ingress controller and it works great! Here's the ingress configuration:
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
annotations:
nginx.ingress.kubernetes.io/configuration-snippet: |
rewrite /push/(.*) /index/$1 break;
rewrite /flights/(.*) /$1 break;
rewrite /grafana/(.*) /$1 break;
spec:
rules:
- host: example.com
http:
paths:
- backend:
serviceName: pushinterface
servicePort: 80
path: /push
- backend:
serviceName: flights
servicePort: 80
path: /flights
- backend:
serviceName: api
servicePort: 80
path: /api
- backend:
serviceName: grafana
servicePort: 80
path: /grafana
Thanks to everyone for the answers! :)

Answer 2

Using ReplacePathRegex rule type in your example does not guarantee that incoming requests will be forwarded to the target backends, as mentioned in Traefik Documentation.
In order to route requests to the endpoints, use Matcher instead of Modifiers rules, as they are designed for that purpose.
Find a separate discussion on the similar issue here.