[SOLVED] VirtualService: match all except prefix?

1

Hi,

I would like to match a “all except prefix” for a VirtualService but I did not find an example…

I thought about using a regexp but saw this https://stackoverflow.com/a/61071071 and Regex negative lookahead not working in VirtualService HTTPMatchRequest · Issue #23416 · istio/istio · GitHub telling Google Re2 doesn’t support this.

Any idea how can I do?

Otherwise I could add another HTTPRule that matches those with the prefix to send nowhere, but how to do route to nowhere?

Thank you,

2

You can get that behavior using multiple http routes, just putting the one that you want to block as the first with a fault injected, and the catchall after. Like this:

apiVersion: networking.istio.io/v1beta1
kind: VirtualService
metadata:
  name: nginx-fault
spec:
  hosts:
  - nginx
  http:
  - match:
    - uri:
        prefix: "/fault" # the prefix you want to drop
    fault:
      abort:
        percentage:
          value: 100
        httpStatus: 400 # Any return code you want
    route:
    - destination:
        host: none
  - route: # catchall rule
    - destination:
        host: nginx
1 Like
3

Thank you @lucasslima ! Indeed it makes the trick even if it’s a bit uggly to get
image

And not something related to the httpStatus 404 I set ^^