When running multiple ingress controllers under Kubernetes with the same host, how are the Regexes evaluated? Does the order matter?
Basically, I have one ingress for the API and another for the frontend.
The API being on example.com/api/ -> api/(.*)
The frontend being on example.com -> (.*)
Does the order I deploy these matter? Since the regex for the frontend will essentially just be (.*), if this is evaluated before the /api/(.*) regex, all traffic will be sent to the frontend, which I don't want.
How can I avoid this?
Thanks, James
Regular expressions follow a first match policy.
Ingress-nginx orders the paths by descending length before putting them into the config.
So in your case it will match api/(.*) on the first place
Also, do not forget that you have to enable regexes with following annotation
nginx.ingress.kubernetes.io/use-regex: "true"