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receiver.go
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receiver.go
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// Copyright 2020, OpenTelemetry 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:https://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 kubeletstatsreceiver
import (
"context"
"time"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/consumer"
"go.uber.org/zap"
"k8s.io/client-go/kubernetes"
"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/kubeletstatsreceiver/kubelet"
"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/redisreceiver/interval"
)
var _ component.MetricsReceiver = (*receiver)(nil)
type receiver struct {
options *receiverOptions
logger *zap.Logger
consumer consumer.MetricsConsumer
runner *interval.Runner
rest kubelet.RestClient
}
type receiverOptions struct {
name string
collectionInterval time.Duration
extraMetadataLabels []kubelet.MetadataLabel
metricGroupsToCollect map[kubelet.MetricGroup]bool
k8sAPIClient kubernetes.Interface
}
func newReceiver(rOptions *receiverOptions,
logger *zap.Logger, rest kubelet.RestClient,
next consumer.MetricsConsumer) (*receiver, error) {
return &receiver{
options: rOptions,
logger: logger,
consumer: next,
rest: rest,
}, nil
}
// Creates and starts the kubelet stats runnable.
func (r *receiver) Start(ctx context.Context, host component.Host) error {
runnable := newRunnable(ctx, r.consumer, r.rest, r.logger, r.options)
r.runner = interval.NewRunner(r.options.collectionInterval, runnable)
go func() {
if err := r.runner.Start(); err != nil {
host.ReportFatalError(err)
}
}()
return nil
}
// Stops the kubelet stats runner.
func (r *receiver) Shutdown(ctx context.Context) error {
r.runner.Stop()
return nil
}