283 lines
8.8 KiB
Go
283 lines
8.8 KiB
Go
/*
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Copyright 2022 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package store
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import (
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"context"
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"strconv"
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basemetrics "k8s.io/component-base/metrics"
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"k8s.io/kube-state-metrics/v2/pkg/metric"
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generator "k8s.io/kube-state-metrics/v2/pkg/metric_generator"
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discoveryv1 "k8s.io/api/discovery/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/watch"
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clientset "k8s.io/client-go/kubernetes"
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"k8s.io/client-go/tools/cache"
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)
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var (
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descEndpointSliceAnnotationsName = "kube_endpointslice_annotations"
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descEndpointSliceAnnotationsHelp = "Kubernetes annotations converted to Prometheus labels."
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descEndpointSliceLabelsName = "kube_endpointslice_labels"
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descEndpointSliceLabelsHelp = "Kubernetes labels converted to Prometheus labels."
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descEndpointSliceLabelsDefaultLabels = []string{"endpointslice", "namespace"}
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)
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func endpointSliceMetricFamilies(allowAnnotationsList, allowLabelsList []string) []generator.FamilyGenerator {
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return []generator.FamilyGenerator{
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*generator.NewFamilyGeneratorWithStability(
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"kube_endpointslice_info",
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"Information about endpointslice.",
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metric.Gauge,
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basemetrics.ALPHA,
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"",
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wrapEndpointSliceFunc(func(s *discoveryv1.EndpointSlice) *metric.Family {
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m := metric.Metric{
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LabelKeys: []string{"addresstype"},
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LabelValues: []string{string(s.AddressType)},
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Value: 1,
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}
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return &metric.Family{Metrics: []*metric.Metric{&m}}
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}),
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),
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*generator.NewFamilyGeneratorWithStability(
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"kube_endpointslice_created",
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"Unix creation timestamp",
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metric.Gauge,
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basemetrics.ALPHA,
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"",
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wrapEndpointSliceFunc(func(s *discoveryv1.EndpointSlice) *metric.Family {
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ms := []*metric.Metric{}
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if !s.CreationTimestamp.IsZero() {
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ms = append(ms, &metric.Metric{
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Value: float64(s.CreationTimestamp.Unix()),
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})
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}
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return &metric.Family{
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Metrics: ms,
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}
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}),
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),
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*generator.NewFamilyGeneratorWithStability(
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"kube_endpointslice_endpoints_hints",
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"Topology routing hints attached to endpoints",
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metric.Gauge,
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basemetrics.ALPHA,
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"",
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wrapEndpointSliceFunc(func(e *discoveryv1.EndpointSlice) *metric.Family {
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m := []*metric.Metric{}
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for _, ep := range e.Endpoints {
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// Hint is populated when the endpoint is configured to be zone aware and preferentially route requests to its local zone.
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// If there is no hint, skip this metric
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if ep.Hints != nil && len(ep.Hints.ForZones) > 0 {
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var (
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labelKeys,
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labelValues []string
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)
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// Per Docs.
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// This must contain at least one address but no more than
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// 100. These are all assumed to be fungible and clients may choose to only
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// use the first element. Refer to: https://issue.k8s.io/106267
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labelKeys = append(labelKeys, "address")
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labelValues = append(labelValues, ep.Addresses[0])
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for _, zone := range ep.Hints.ForZones {
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m = append(m, &metric.Metric{
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LabelKeys: append(labelKeys, "for_zone"),
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LabelValues: append(labelValues, zone.Name),
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Value: 1,
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})
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}
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}
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}
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return &metric.Family{
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Metrics: m,
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}
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}),
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),
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*generator.NewFamilyGeneratorWithStability(
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"kube_endpointslice_endpoints",
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"Endpoints attached to the endpointslice.",
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metric.Gauge,
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basemetrics.ALPHA,
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"",
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wrapEndpointSliceFunc(func(e *discoveryv1.EndpointSlice) *metric.Family {
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m := []*metric.Metric{}
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for _, ep := range e.Endpoints {
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var (
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labelKeys,
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labelValues []string
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)
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if ep.Conditions.Ready != nil {
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labelKeys = append(labelKeys, "ready")
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labelValues = append(labelValues, strconv.FormatBool(*ep.Conditions.Ready))
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}
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if ep.Conditions.Serving != nil {
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labelKeys = append(labelKeys, "serving")
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labelValues = append(labelValues, strconv.FormatBool(*ep.Conditions.Serving))
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}
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if ep.Conditions.Terminating != nil {
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labelKeys = append(labelKeys, "terminating")
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labelValues = append(labelValues, strconv.FormatBool(*ep.Conditions.Terminating))
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}
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if ep.Hostname != nil {
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labelKeys = append(labelKeys, "hostname")
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labelValues = append(labelValues, *ep.Hostname)
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}
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if ep.TargetRef != nil {
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if ep.TargetRef.Kind != "" {
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labelKeys = append(labelKeys, "targetref_kind")
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labelValues = append(labelValues, ep.TargetRef.Kind)
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}
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if ep.TargetRef.Name != "" {
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labelKeys = append(labelKeys, "targetref_name")
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labelValues = append(labelValues, ep.TargetRef.Name)
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}
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if ep.TargetRef.Namespace != "" {
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labelKeys = append(labelKeys, "targetref_namespace")
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labelValues = append(labelValues, ep.TargetRef.Namespace)
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}
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}
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if ep.NodeName != nil {
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labelKeys = append(labelKeys, "endpoint_nodename")
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labelValues = append(labelValues, *ep.NodeName)
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}
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if ep.Zone != nil {
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labelKeys = append(labelKeys, "endpoint_zone")
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labelValues = append(labelValues, *ep.Zone)
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}
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labelKeys = append(labelKeys, "address")
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for _, address := range ep.Addresses {
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newlabelValues := make([]string, len(labelValues))
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copy(newlabelValues, labelValues)
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newlabelValues = append(newlabelValues, address)
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m = append(m, &metric.Metric{
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LabelKeys: labelKeys,
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LabelValues: newlabelValues,
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Value: 1,
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})
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}
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}
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return &metric.Family{
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Metrics: m,
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}
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}),
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),
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*generator.NewFamilyGeneratorWithStability(
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"kube_endpointslice_ports",
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"Ports attached to the endpointslice.",
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metric.Gauge,
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basemetrics.ALPHA,
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"",
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wrapEndpointSliceFunc(func(e *discoveryv1.EndpointSlice) *metric.Family {
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m := []*metric.Metric{}
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for _, port := range e.Ports {
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m = append(m, &metric.Metric{
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LabelValues: []string{*port.Name, string(*port.Protocol), strconv.FormatInt(int64(*port.Port), 10)},
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LabelKeys: []string{"port_name", "port_protocol", "port_number"},
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Value: 1,
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})
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}
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return &metric.Family{
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Metrics: m,
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}
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}),
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),
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*generator.NewFamilyGeneratorWithStability(
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descEndpointSliceAnnotationsName,
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descEndpointSliceAnnotationsHelp,
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metric.Gauge,
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basemetrics.ALPHA,
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"",
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wrapEndpointSliceFunc(func(s *discoveryv1.EndpointSlice) *metric.Family {
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if len(allowAnnotationsList) == 0 {
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return &metric.Family{}
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}
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annotationKeys, annotationValues := createPrometheusLabelKeysValues("annotation", s.Annotations, allowAnnotationsList)
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return &metric.Family{
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Metrics: []*metric.Metric{
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{
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LabelKeys: annotationKeys,
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LabelValues: annotationValues,
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Value: 1,
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},
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},
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}
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}),
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),
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*generator.NewFamilyGeneratorWithStability(
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descEndpointSliceLabelsName,
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descEndpointSliceLabelsHelp,
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metric.Gauge,
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basemetrics.ALPHA,
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"",
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wrapEndpointSliceFunc(func(s *discoveryv1.EndpointSlice) *metric.Family {
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if len(allowLabelsList) == 0 {
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return &metric.Family{}
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}
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labelKeys, labelValues := createPrometheusLabelKeysValues("label", s.Labels, allowLabelsList)
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return &metric.Family{
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Metrics: []*metric.Metric{
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{
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LabelKeys: labelKeys,
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LabelValues: labelValues,
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Value: 1,
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},
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},
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}
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}),
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),
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}
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}
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func wrapEndpointSliceFunc(f func(*discoveryv1.EndpointSlice) *metric.Family) func(interface{}) *metric.Family {
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return func(obj interface{}) *metric.Family {
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endpointSlice := obj.(*discoveryv1.EndpointSlice)
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metricFamily := f(endpointSlice)
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for _, m := range metricFamily.Metrics {
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m.LabelKeys, m.LabelValues = mergeKeyValues(descEndpointSliceLabelsDefaultLabels, []string{endpointSlice.Name, endpointSlice.Namespace}, m.LabelKeys, m.LabelValues)
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}
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return metricFamily
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}
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}
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func createEndpointSliceListWatch(kubeClient clientset.Interface, ns string, fieldSelector string) cache.ListerWatcher {
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return &cache.ListWatch{
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ListFunc: func(opts metav1.ListOptions) (runtime.Object, error) {
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opts.FieldSelector = fieldSelector
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return kubeClient.DiscoveryV1().EndpointSlices(ns).List(context.TODO(), opts)
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},
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WatchFunc: func(opts metav1.ListOptions) (watch.Interface, error) {
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opts.FieldSelector = fieldSelector
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return kubeClient.DiscoveryV1().EndpointSlices(ns).Watch(context.TODO(), opts)
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},
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}
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}
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