Thanos "To many redirects" using --web.external-prefix

[rodrigoscferraz]

Which chart:
Thanos 6.0.0

Describe the bug
Maybe this is not a bug, i think i missconfigure something ... I'm trying to expose bucketweb throught ISTIO but i'm receiving "TO MANY REDIORECTS" when i try to access.
An interesting point is that if i put /metrics at the end it works, but if try to access the root path i receive the redirect message.

To Reproduce
Steps to reproduce the behavior:
I have this config for my bucketweb

    bucketweb:
      service:
        http:
          port: 8080
      enabled: true
      extraFlags:
        - --web.external-prefix=tools/thanos-bucketweb

And for my virtual service i have this:

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: thanos-bucketweb-monitoring-vsvc
  namespace: monitoring
spec:
  hosts:
  - internal.test.io
  gateways:
  - istio-system/private-gateway
  http:
  - match:
    - uri:
        exact: /tools/thanos-bucketweb
    - uri:
        prefix: /tools/thanos-bucketweb/
    rewrite:
      uri: /
    route:
    - destination:
        host: thanos-bucketweb
        port:
          number: 8080

Expected behavior
A clear and concise description of what you expected to happen.

Version of Helm and Kubernetes:

• Output of helm version:

version.BuildInfo{Version:"v3.6.3", GitCommit:"d506314abfb5d21419df8c7e7e68012379db2354", GitTreeState:"clean", GoVersion:"go1.16.5"}

• Output of kubectl version:

Client Version: version.Info{Major:"1", Minor:"22", GitVersion:"v1.22.2", GitCommit:"8b5a19147530eaac9476b0ab82980b4088bbc1b2", GitTreeState:"clean", BuildDate:"2021-09-15T21:38:50Z", GoVersion:"go1.16.8", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"21", GitVersion:"v1.21.2+k3s1", GitCommit:"5a67e8dc473f8945e8e181f6f0b0dbbc387f6fca", GitTreeState:"clean", BuildDate:"2021-06-21T20:52:44Z", GoVersion:"go1.16.4", Compiler:"gc", Platform:"linux/amd64"}

[rodrigoscferraz]

I noticed that the /static content are not coming from /tools/thanos-bucketweb/static but from /tools/static...i just don't know why...

[alvneiayu]

hi @rodrigoscferraz

I am not expert in Thanos but I will try to do my best. Officially, we are not testing our charts with Istio, so we don't know if we have compatibility or not at this moment. Moreover, I found a Thanos case reporting an error with the flag external-prefix (case). I don't know if this is affecting you.

I will try to investigate a little bit to try to help you.

Thanks a lot

Álvaro

[rodrigoscferraz]

Hello @alvneiayu ! Thx for your help!
Seem like that is the same sittuation, i wiil follow this thread, maybe i found something.
Thx a lot!

[alvneiayu]

hi @rodrigoscferraz

You're welcome. Let me know if I can help you with something else.

Thanks

Álvaro

[github-actions]

This Issue has been automatically marked as "stale" because it has not had recent activity (for 15 days). It will be closed if no further activity occurs. Thanks for the feedback.

[github-actions]

Due to the lack of activity in the last 5 days since it was marked as "stale", we proceed to close this Issue. Do not hesitate to reopen it later if necessary.