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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| /* | ||
| Copyright 2021 The Kubernetes Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package metrics | ||
|
|
||
| import ( | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/prometheus/client_golang/prometheus" | ||
| "sigs.k8s.io/controller-runtime/pkg/metrics" | ||
| ) | ||
|
|
||
| type OpenstackPrometheusMetrics struct { | ||
| Duration *prometheus.HistogramVec | ||
| Total *prometheus.CounterVec | ||
| Errors *prometheus.CounterVec | ||
| } | ||
|
|
||
| // MetricContext indicates the context for OpenStack metrics. | ||
| type MetricPrometheusContext struct { | ||
| Start time.Time | ||
| Attributes []string | ||
| Metrics *OpenstackPrometheusMetrics | ||
| } | ||
|
|
||
| // NewMetricContext creates a new MetricContext. | ||
| func NewMetricPrometheusContext(resource string, request string) *MetricPrometheusContext { | ||
| return &MetricPrometheusContext{ | ||
| Start: time.Now(), | ||
| Attributes: []string{resource + "_" + request}, | ||
| } | ||
| } | ||
|
|
||
| // ObserveRequest records the request latency and counts the errors. | ||
| func (mc *MetricPrometheusContext) ObserveRequest(err error) error { | ||
| return mc.Observe(APIRequestPrometheusMetrics, err) | ||
| } | ||
|
|
||
| // ObserveRequest records the request latency and counts the errors. | ||
| func (mc *MetricPrometheusContext) Observe(om *OpenstackPrometheusMetrics, err error) error { | ||
| if om == nil { | ||
| // mc.RequestMetrics not set, ignore this request | ||
| return nil | ||
| } | ||
|
|
||
| om.Duration.WithLabelValues(mc.Attributes...).Observe( | ||
| time.Since(mc.Start).Seconds()) | ||
| om.Total.WithLabelValues(mc.Attributes...).Inc() | ||
| if err != nil { | ||
| om.Errors.WithLabelValues(mc.Attributes...).Inc() | ||
| } | ||
| return err | ||
| } | ||
|
|
||
| var ( | ||
| APIRequestPrometheusMetrics = &OpenstackPrometheusMetrics{ | ||
| Duration: prometheus.NewHistogramVec( | ||
| prometheus.HistogramOpts{ | ||
| Namespace: "capo", | ||
| Name: "openstack_api_request_duration_seconds", | ||
| Help: "Latency of an OpenStack API call", | ||
| }, []string{"request"}), | ||
| Total: prometheus.NewCounterVec( | ||
| prometheus.CounterOpts{ | ||
| Namespace: "capo", | ||
| Name: "openstack_api_requests_total", | ||
| Help: "Total number of OpenStack API calls", | ||
| }, []string{"request"}), | ||
| Errors: prometheus.NewCounterVec( | ||
| prometheus.CounterOpts{ | ||
| Namespace: "capo", | ||
| Name: "openstack_api_request_errors_total", | ||
| Help: "Total number of errors for an OpenStack API call", | ||
| }, []string{"request"}), | ||
| } | ||
| ) | ||
|
|
||
| var registerAPIPrometheusMetrics sync.Once | ||
|
|
||
| func RegisterAPIPrometheusMetrics() { | ||
| registerAPIPrometheusMetrics.Do(func() { | ||
| metrics.Registry.MustRegister(APIRequestPrometheusMetrics.Duration) | ||
| metrics.Registry.MustRegister(APIRequestPrometheusMetrics.Total) | ||
| metrics.Registry.MustRegister(APIRequestPrometheusMetrics.Errors) | ||
| }) | ||
| } |