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metrics.go
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/
metrics.go
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//
// DISCLAIMER
//
// Copyright 2023 ArangoDB GmbH, Cologne, Germany
//
// 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.
//
// Copyright holder is ArangoDB GmbH, Cologne, Germany
//
package inspector
import (
"reflect"
"sync"
meta "k8s.io/apimachinery/pkg/apis/meta/v1"
"github.com/dalet-oss/arangodb-operator/pkg/generated/metric_descriptions"
"github.com/dalet-oss/arangodb-operator/pkg/metrics/collector"
"github.com/dalet-oss/arangodb-operator/pkg/util/k8sutil/inspector/definitions"
"github.com/dalet-oss/arangodb-operator/pkg/util/metrics"
)
func init() {
collector.GetCollector().RegisterMetric(clientMetricsInstance)
}
var (
clientMetricsInstance = &clientMetrics{}
)
type clientMetricsFields struct {
calls int
errors int
}
type clientMetrics struct {
lock sync.Mutex
metrics map[definitions.Component]map[definitions.Verb]clientMetricsFields
}
func (c *clientMetrics) reset() {
c.lock.Lock()
defer c.lock.Unlock()
c.metrics = nil
}
func (c *clientMetrics) CollectMetrics(in metrics.PushMetric) {
c.lock.Lock()
defer c.lock.Unlock()
for component, verbs := range c.metrics {
for verb, fields := range verbs {
in.Push(
metric_descriptions.ArangodbOperatorKubernetesClientRequestsCounter(float64(fields.calls), string(component), string(verb)),
metric_descriptions.ArangodbOperatorKubernetesClientRequestErrorsCounter(float64(fields.errors), string(component), string(verb)),
)
}
}
}
func (c *clientMetrics) ObjectRequest(definition definitions.Component, verb definitions.Verb, object meta.Object, err error) {
if object == nil || (reflect.ValueOf(object).Kind() == reflect.Ptr && reflect.ValueOf(object).IsNil()) {
return
}
c.Request(definition, verb, object.GetName(), err)
}
func (c *clientMetrics) Request(definition definitions.Component, verb definitions.Verb, name string, err error) {
c.lock.Lock()
defer c.lock.Unlock()
if c.metrics == nil {
c.metrics = map[definitions.Component]map[definitions.Verb]clientMetricsFields{}
}
if _, ok := c.metrics[definition]; !ok {
c.metrics[definition] = map[definitions.Verb]clientMetricsFields{}
}
if _, ok := c.metrics[definition][verb]; !ok {
c.metrics[definition][verb] = clientMetricsFields{}
}
f := c.metrics[definition][verb]
f.calls++
if err != nil {
f.errors++
}
c.metrics[definition][verb] = f
// Logging
log := clientLogger.Str("name", name).Str("kind", string(definition)).Str("verb", string(verb)).Err(err)
if err == nil {
call := log.Debug
switch verb {
case definitions.Get:
call = log.Trace
case definitions.Update, definitions.UpdateStatus, definitions.Patch:
call = log.Debug
case definitions.Create, definitions.Delete:
call = log.Info
case definitions.ForceDelete:
call = log.Warn
}
call("Kubernetes request has been send")
} else {
log.Warn("Kubernetes request failed")
}
}