Rewriting paths with Traefik - docker

Question

Can someone give a simple example on how to route the following URLs:
http://monitor.app.com/service-one
http://monitor.app.com/service-two
http://monitor.app.com/service-three
http://monitor.app.com/service-four
To the following backend services?
http://service-one/monitor
http://service-two/monitor
http://service-three/monitor
http://service-four/monitor
Preferably using the [file] syntax of Traefik, although any is fine.

Answer 1

Here is a configuration for your example. Adjust it according to your real cluster configuration:
apiVersion: v1
kind: Service
metadata:
name: service-one
spec:
selector:
k8s-app: service-one-app
ports:
- port: 80
targetPort: 8080
---
apiVersion: v1
kind: Service
metadata:
name: service-two
spec:
selector:
k8s-app: service-two-app
ports:
- port: 80
targetPort: 8080
---
apiVersion: v1
kind: Service
metadata:
name: service-three
spec:
selector:
k8s-app: service-three-app
ports:
- port: 80
targetPort: 8080
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: monitor.app
annotations:
kubernetes.io/ingress.class: traefik
traefik.ingress.kubernetes.io/rewrite-target: /monitor # set path to result request
spec:
rules:
- host: monitor.app.com
http:
paths:
- path /service-one # path for routing, it will be removed because of PathPrefixStrip settings
backend:
serviceName: service-one
servicePort: 80
- path /service-two # path for routing, it will be removed because of PathPrefixStrip settings
backend:
serviceName: service-two
servicePort: 80
- path /service-three # path for routing, it will be removed because of PathPrefixStrip settings
backend:
serviceName: service-three
servicePort: 80
Additional information could be found here:
Kubernetes Ingress Controller
Kubernetes Ingress Provider
kubernetes ingress rewrite-target implementation #1723