I am currently trying to rewrite four paths in kubernetes ingress.
The three are done but the static file path is a bit tricky.
My frontend path is /$1 -> /(.*) web-front-cluster-ip-service
I also need to rewrite all /img/$1 -> /img/(.*) apollo-api-cluster-ip-service
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: servers-ingress-service
annotations:
kubernetes.io/ingress.class: nginx
nginx.ingress.kubernetes.io/rewrite-target: /$1
spec:
rules:
- http:
paths:
- backend:
serviceName: apollo-api-cluster-ip-service
servicePort: 4000
path: /apollo_api/?(.*)
- backend:
serviceName: rest-api-cluster-ip-service
servicePort: 5000
path: /rest/?(.*)
- backend:
serviceName: web-front-cluster-ip-service
servicePort: 6000
path: /?(.*)
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: statics-ingress-service
annotations:
kubernetes.io/ingress.class: nginx
nginx.ingress.kubernetes.io/rewrite-target: /img/$1
spec:
rules:
- http:
paths:
- backend:
serviceName: apollo-api-cluster-ip-service
servicePort: 4000
path: /img/?$(.*)My current setting looks like above but for unknown reason, I am not able to reach the route configured by the second route.
So what I am trying to do instead is to combine two routes together and provide prefix to capture group that matches /img
if I do
- backend:
serviceName: apollo-api-cluster-ip-service
servicePort: 6000
path: /?(.*)it will route everything to apollo-api when I need any route that does not start with /img to be routed to web-front
so I need something like below
- backend:
serviceName: apollo-api-cluster-ip-service
servicePort: 4000
path: /img?(.*) <- somehow add /img to $(.*) because currently it rewrites `/img/static.png` -> `/static.png` but I need `/img/static.png` -> `/img/static.png`.Any help would be appreciated.
As mentioned in Rewrite Target documentation:
!!! attention Starting in Version 0.22.0, ingress definitions using the annotation nginx.ingress.kubernetes.io/rewrite-target are not backwards compatible with previous versions. In Version 0.22.0 and beyond, any substrings within the request URI that need to be passed to the rewritten path must explicitly be defined in a capture group.
!!! note Captured groups are saved in numbered placeholders, chronologically, in the form $1, $2 ... $n. These placeholders can be used as parameters in the rewrite-target annotation.
So I suppose your second ingress should look like:
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: statics-ingress-service
annotations:
kubernetes.io/ingress.class: nginx
nginx.ingress.kubernetes.io/rewrite-target: /img/$2
spec:
rules:
- http:
paths:
- backend:
serviceName: apollo-api-cluster-ip-service
servicePort: 4000
path: /img(/|$)(.*)In this case $2 will reflect (.*)