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receiver.go
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receiver.go
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// Copyright 2019, 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 awsecscontainermetricsreceiver
import (
"context"
"time"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/component/componenterror"
"go.opentelemetry.io/collector/consumer"
"go.opentelemetry.io/collector/obsreport"
"go.uber.org/zap"
"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/awsecscontainermetricsreceiver/awsecscontainermetrics"
)
var _ component.MetricsReceiver = (*awsEcsContainerMetricsReceiver)(nil)
// awsEcsContainerMetricsReceiver implements the component.MetricsReceiver for aws ecs container metrics.
type awsEcsContainerMetricsReceiver struct {
logger *zap.Logger
nextConsumer consumer.MetricsConsumer
config *Config
cancel context.CancelFunc
restClient awsecscontainermetrics.RestClient
provider *awsecscontainermetrics.StatsProvider
}
// New creates the aws ecs container metrics receiver with the given parameters.
func New(
logger *zap.Logger,
config *Config,
nextConsumer consumer.MetricsConsumer,
rest awsecscontainermetrics.RestClient) (component.MetricsReceiver, error) {
if nextConsumer == nil {
return nil, componenterror.ErrNilNextConsumer
}
r := &awsEcsContainerMetricsReceiver{
logger: logger,
nextConsumer: nextConsumer,
config: config,
restClient: rest,
}
return r, nil
}
// Start begins collecting metrics from Amazon ECS task metadata endpoint.
func (aecmr *awsEcsContainerMetricsReceiver) Start(ctx context.Context, host component.Host) error {
ctx, aecmr.cancel = context.WithCancel(obsreport.ReceiverContext(ctx, aecmr.config.Name(), "http"))
go func() {
ticker := time.NewTicker(aecmr.config.CollectionInterval)
defer ticker.Stop()
for {
select {
case <-ticker.C:
aecmr.collectDataFromEndpoint(ctx)
case <-ctx.Done():
return
}
}
}()
return nil
}
// Shutdown stops the awsecscontainermetricsreceiver receiver.
func (aecmr *awsEcsContainerMetricsReceiver) Shutdown(context.Context) error {
aecmr.cancel()
return nil
}
// collectDataFromEndpoint collects container stats from Amazon ECS Task Metadata Endpoint
func (aecmr *awsEcsContainerMetricsReceiver) collectDataFromEndpoint(ctx context.Context) error {
aecmr.provider = awsecscontainermetrics.NewStatsProvider(aecmr.restClient)
stats, metadata, err := aecmr.provider.GetStats()
if err != nil {
aecmr.logger.Error("Failed to collect stats", zap.Error(err))
return err
}
// TODO: report self metrics using obsreport
mds := awsecscontainermetrics.MetricsData(stats, metadata, aecmr.logger)
for _, md := range mds {
err = aecmr.nextConsumer.ConsumeMetrics(ctx, md)
if err != nil {
return err
}
}
return nil
}