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metrics.go
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metrics.go
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// Copyright 2023 The PipeCD 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 kubernetesmetrics
import (
"context"
"github.com/prometheus/client_golang/prometheus"
"k8s.io/client-go/tools/metrics"
)
const (
hostKey = "host"
methodKey = "method"
codeKey = "code"
eventKey = "event"
eventHandledKey = "handled"
)
type EventKind string
const (
LabelEventAdd EventKind = "add"
LabelEventUpdate EventKind = "update"
LabelEventDelete EventKind = "delete"
)
type EventHandledVal string
const (
LabelEventHandled EventHandledVal = "true"
LabelEventNotYetHandled EventHandledVal = "false"
)
var (
apiRequestsCounter = prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: "livestatestore_kubernetes_api_requests_total",
Help: "Number of requests sent to kubernetes api server.",
},
[]string{
hostKey,
methodKey,
codeKey,
},
)
resourceEventsCounter = prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: "livestatestore_kubernetes_resource_events_total",
Help: "Number of resource events received from kubernetes server.",
},
[]string{
eventKey,
eventHandledKey,
},
)
)
func Register(r prometheus.Registerer) {
r.MustRegister(
apiRequestsCounter,
resourceEventsCounter,
)
opts := metrics.RegisterOpts{
RequestResult: requestResultCollector{},
}
metrics.Register(opts)
}
type requestResultCollector struct {
}
func (c requestResultCollector) Increment(ctx context.Context, code string, method string, host string) {
apiRequestsCounter.With(prometheus.Labels{
hostKey: host,
methodKey: method,
codeKey: code,
}).Inc()
}
func IncResourceEventsCounter(event EventKind, handled EventHandledVal) {
resourceEventsCounter.With(prometheus.Labels{
eventKey: string(event),
eventHandledKey: string(handled),
}).Inc()
}