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Framework for implementing custom metrics support for Kubernetes

Results 21 custom-metrics-apiserver issues
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## Problem Right now, it is possible for custom/external metrics adapter implemented using this library to expose and list metrics with names, which do not match Kubernetes resource naming convention,...

kind/bug
lifecycle/frozen
needs-triage

In some frequently queried scenarios, such as hpa, the default api qps of client-go is relatively small, which will lead to frequent client-side throttle. We can support qps and burst...

This pr is part of kep [#3247](https://github.com/kubernetes/enhancements/pull/3247), For completion [#3134](https://github.com/kubernetes/enhancements/issues/3134). We need to complete [#109457](https://github.com/kubernetes/kubernetes/issues/109457) before deal with this pr

cncf-cla: yes
size/L

there is a sercurity hole. CVE-2022-1996 Hope: upgrade version to v3.8.0

Currently only one custom or external metrics server in the cluster is supported (because there can be only one `APIService` resouce specified), as already discussed in #3 in #68. This...

lifecycle/frozen

This adds a reference doc for metrics exposed by this component. Mostly generated using tooling from k/k. I can check in the scripts if necessary but it's a bit hacky...

cncf-cla: yes
size/L
needs-ok-to-test
needs-triage

Fixes #167

cncf-cla: yes
size/L
do-not-merge/hold
approved
needs-triage

We should add a documentation that would easily be consumable by our users. We could do something similar to Kubernetes in https://kubernetes.io/docs/reference/instrumentation/metrics/ and reuse their static analysis tool that generates...

help wanted
kind/documentation
triage/accepted

HI, my go application using ``` sigs.k8s.io/custom-metrics-apiserver v1.28.0 k8s.io/apiserver v0.29.2 ``` and it can't compile succeed because of this function **func (o *CustomMetricsAdapterServerOptions) ApplyTo(serverConfig *genericapiserver.Config) error **. In this function,...

help wanted
needs-triage

A lot of code was copied from upstream k/k, but it is not documented which file/functions are and they have hardly been updated since. To make it easier and maybe...

triage/accepted