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Merge pull request #69895 from jpbetz/webhook-metrics-cardinality-fix

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Reduce cardinality of admission webhook metrics
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k8s-ci-robot 2018-10-22 14:21:29 -07:00 committed by GitHub
commit 04d3949048
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2 changed files with 17 additions and 32 deletions
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15
staging/src/k8s.io/apiserver/pkg/admission/metrics/metrics.go
View File

@ -112,17 +112,17 @@ func newAdmissionMetrics() *AdmissionMetrics {
// Admission metrics for a step of the admission flow. The entire admission flow is broken down into a series of steps
// Each step is identified by a distinct type label value.
step := newMetricSet("step",
[]string{"type", "operation", "group", "version", "resource", "subresource", "rejected"},
[]string{"type", "operation", "rejected"},
"Admission sub-step %s, broken out for each operation and API resource and step type (validate or admit).", true)
// Built-in admission controller metrics. Each admission controller is identified by name.
controller := newMetricSet("controller",
[]string{"name", "type", "operation", "group", "version", "resource", "subresource", "rejected"},
[]string{"name", "type", "operation", "rejected"},
"Admission controller %s, identified by name and broken out for each operation and API resource and type (validate or admit).", false)
// Admission webhook metrics. Each webhook is identified by name.
webhook := newMetricSet("webhook",
[]string{"name", "type", "operation", "group", "version", "resource", "subresource", "rejected"},
[]string{"name", "type", "operation", "rejected"},
"Admission webhook %s, identified by name and broken out for each operation and API resource and type (validate or admit).", false)
step.mustRegister()
@ -139,20 +139,17 @@ func (m *AdmissionMetrics) reset() {
// ObserveAdmissionStep records admission related metrics for a admission step, identified by step type.
func (m *AdmissionMetrics) ObserveAdmissionStep(elapsed time.Duration, rejected bool, attr admission.Attributes, stepType string, extraLabels ...string) {
gvr := attr.GetResource()
m.step.observe(elapsed, append(extraLabels, stepType, string(attr.GetOperation()), gvr.Group, gvr.Version, gvr.Resource, attr.GetSubresource(), strconv.FormatBool(rejected))...)
m.step.observe(elapsed, append(extraLabels, stepType, string(attr.GetOperation()), strconv.FormatBool(rejected))...)
}
// ObserveAdmissionController records admission related metrics for a built-in admission controller, identified by it's plugin handler name.
func (m *AdmissionMetrics) ObserveAdmissionController(elapsed time.Duration, rejected bool, attr admission.Attributes, stepType string, extraLabels ...string) {
gvr := attr.GetResource()
m.controller.observe(elapsed, append(extraLabels, stepType, string(attr.GetOperation()), gvr.Group, gvr.Version, gvr.Resource, attr.GetSubresource(), strconv.FormatBool(rejected))...)
m.controller.observe(elapsed, append(extraLabels, stepType, string(attr.GetOperation()), strconv.FormatBool(rejected))...)
}
// ObserveWebhook records admission related metrics for a admission webhook.
func (m *AdmissionMetrics) ObserveWebhook(elapsed time.Duration, rejected bool, attr admission.Attributes, stepType string, extraLabels ...string) {
gvr := attr.GetResource()
m.webhook.observe(elapsed, append(extraLabels, stepType, string(attr.GetOperation()), gvr.Group, gvr.Version, gvr.Resource, attr.GetSubresource(), strconv.FormatBool(rejected))...)
m.webhook.observe(elapsed, append(extraLabels, stepType, string(attr.GetOperation()), strconv.FormatBool(rejected))...)
}
type metricSet struct {

12
staging/src/k8s.io/apiserver/pkg/admission/metrics/metrics_test.go
View File

@ -38,10 +38,6 @@ func TestObserveAdmissionStep(t *testing.T) {
handler.(admission.ValidationInterface).Validate(attr)
wantLabels := map[string]string{
"operation": string(admission.Create),
"group": resource.Group,
"version": resource.Version,
"resource": resource.Resource,
"subresource": "subresource",
"type": "admit",
"rejected": "false",
}
@ -61,10 +57,6 @@ func TestObserveAdmissionController(t *testing.T) {
wantLabels := map[string]string{
"name": "a",
"operation": string(admission.Create),
"group": resource.Group,
"version": resource.Version,
"resource": resource.Resource,
"subresource": "subresource",
"type": "admit",
"rejected": "false",
}
@ -80,10 +72,6 @@ func TestObserveWebhook(t *testing.T) {
wantLabels := map[string]string{
"name": "x",
"operation": string(admission.Create),
"group": resource.Group,
"version": resource.Version,
"resource": resource.Resource,
"subresource": "subresource",
"type": "admit",
"rejected": "false",
}