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add some documentation around the metrics stability migration changes for clarity

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This commit is contained in:
Han Kang 2019-08-26 18:37:40 -07:00
parent 3a50917795
commit 6f70f781df
2 changed files with 21 additions and 11 deletions
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10
pkg/volume/util/metrics.go
View File

@ -30,6 +30,14 @@ const (
statusFailUnknown = "fail-unknown"
)
/*
* By default, all the following metrics are defined as falling under
* ALPHA stability level https://github.com/kubernetes/enhancements/blob/master/keps/sig-instrumentation/20190404-kubernetes-control-plane-metrics-stability.md#stability-classes)
*
* Promoting the stability level of the metric is a responsibility of the component owner, since it
* involves explicitly acknowledging support for the metric across multiple releases, in accordance with
* the metric stability policy.
*/
var storageOperationMetric = metrics.NewHistogramVec(
&metrics.HistogramOpts{
Name: "storage_operation_duration_seconds",
@ -73,6 +81,8 @@ func init() {
}
func registerMetrics() {
// legacyregistry is the internal k8s wrapper around the prometheus
// global registry, used specifically for metric stability enforcement
legacyregistry.MustRegister(storageOperationMetric)
legacyregistry.MustRegister(storageOperationErrorMetric)
legacyregistry.MustRegister(storageOperationStatusMetric)

2
staging/src/k8s.io/component-base/metrics/version.go
View File

@ -32,6 +32,6 @@ var (
// RegisterBuildInfo registers the build and version info in a metadata metric in prometheus
func RegisterBuildInfo(r KubeRegistry) {
info := version.Get()
buildInfo.WithLabelValues(info.Major, info.Minor, info.GitVersion, info.GitCommit, info.GitTreeState, info.BuildDate, info.GoVersion, info.Compiler, info.Platform).Set(1)
r.MustRegister(buildInfo)
buildInfo.WithLabelValues(info.Major, info.Minor, info.GitVersion, info.GitCommit, info.GitTreeState, info.BuildDate, info.GoVersion, info.Compiler, info.Platform).Set(1)
}