Remove old ingress-rules metrics for prometheus scraping about ingress-nginx

[k8s-ci-robot]

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[longwuyuan]

/help

@SilentEntity thanks for reporting this.

• Yes, you are right and this has been going on for a long time
• Another typical example is expired cert will continue showing up, even after the related ingress is deleted
• But personally I am waiting for clarity from someone on the aspect of the data being a timeseries. The context being, the old rule metrics being present and the metrics from a deleted ingress's cert being present are timeseries data that a user may continue to view in grafana (or get from raw prometheus), in future

So I don't think this is a bug unless we can discuss and triage it to be a bug. So lets wait for expert comments and opinions

/assign

[k8s-ci-robot]

@longwuyuan:
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In response to this:

/help

@SilentEntity thanks for reporting this.

• Yes, you are right and this has been going on for a long time
• Another typical example is expired cert will continue showing up, even after the related ingress is deleted
• But personally I am waiting for clarity from someone on the aspect of the data being a timeseries. The context being, the old rule metrics being present and the metrics from a deleted ingress's cert being present are timeseries data that a user may continue to view in grafana (or get from raw prometheus), in future

So I don't think this is a bug unless we can discuss and triage it to be a bug. So lets wait for expert comments and opinions

/assign

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[longwuyuan]

/remove-kind bug