Openshift router does not respect ingress.kubernetes.io annotations

[megastallman]

Openshift router does not respect ingress.kubernetes.io annotations, when tuned for kubernetes-ingress compatibility(https://docs.openshift.org/latest/admin_guide/managing_networking.html).

Version

$ oc version
oc v3.9.0+191fece
kubernetes v1.9.1+a0ce1bc657
features: Basic-Auth GSSAPI Kerberos SPNEGO

Steps To Reproduce

I'm using the same ingress controller resource for phpmyadmin(this application is a nice example to triage the issue), deployed on Tectonic with nginx-based ingress controller, using the following annotations:

  annotations:
    ingress.kubernetes.io/add-base-url: 'true'
    ingress.kubernetes.io/rewrite-target: /

and it works.
I've enabled the ingress compatibility on Openshift. Other applications work great, especially cookie session-affinity, but phppgadmin does not. The base-url is not getting added.

Current Result

ingress.kubernetes.io annotations are ignored

Expected Result

ingress.kubernetes.io annotations should be respected. These annotations are not nginx-specific, so should be supported across all ingress-controllers.

[jwforres]

@openshift/sig-networking

[openshift-bot]

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Exclude this issue from closing by commenting /lifecycle frozen.

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/lifecycle stale

[openshift-merge-robot]

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Mark the issue as fresh by commenting /remove-lifecycle rotten.
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Exclude this issue from closing by commenting /lifecycle frozen.

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/lifecycle rotten
/remove-lifecycle stale

[megastallman]

Guys, actually this issue is not resolved yet. I've quit using rewrites and added an intermediate Nginx instance, but the problem is still here.

[ironcladlou]

/lifecycle frozen

[steimntz]

I've been trying it a lot these days but without success I had tried with others annotations such as nginx.ingress.kubernetes.io and variations however it had not been working properly because it doesn't make any change on the Ingress behavior.

[ironcladlou]

I'm unable to locate any documentation upstream about the cited annotations being part of the "spec" for an ingress controller:

https://kubernetes.io/docs/concepts/services-networking/ingress/
https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.14/#ingress-v1beta1-networking-k8s-io
https://kubernetes.io/docs/concepts/services-networking/ingress-controllers/

I could very well be missing something — can someone help? So far the annotations being asked for appear to be specific to ingress controller implementations (e.g. nginx). To me, the spec for an ingress controller is one that implements an Ingress resource. Do you have a different understanding?

There is one section that defines which I would interpret as being a specified annotation, and that's kubernetes.io/ingress.class.

[danwinship]

/remove-sig networking
/sig network-edge