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driver.go
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driver.go
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// Copyright 2015 Google Inc. All Rights Reserved.
//
// 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 kafka
import (
"net/url"
"sync"
"time"
"github.com/golang/glog"
kafka_common "k8s.io/heapster/common/kafka"
"k8s.io/heapster/metrics/core"
)
type KafkaSinkPoint struct {
MetricsName string
MetricsValue interface{}
MetricsTimestamp time.Time
MetricsTags map[string]string
}
type kafkaSink struct {
kafka_common.KafkaClient
sync.RWMutex
}
func (sink *kafkaSink) ExportData(dataBatch *core.DataBatch) {
sink.Lock()
defer sink.Unlock()
for _, metricSet := range dataBatch.MetricSets {
for metricName, metricValue := range metricSet.MetricValues {
point := KafkaSinkPoint{
MetricsName: metricName,
MetricsTags: metricSet.Labels,
MetricsValue: map[string]interface{}{
"value": metricValue.GetValue(),
},
MetricsTimestamp: dataBatch.Timestamp.UTC(),
}
err := sink.ProduceKafkaMessage(point)
if err != nil {
glog.Errorf("Failed to produce metric message: %s", err)
}
}
for _, metric := range metricSet.LabeledMetrics {
labels := make(map[string]string)
for k, v := range metricSet.Labels {
labels[k] = v
}
for k, v := range metric.Labels {
labels[k] = v
}
point := KafkaSinkPoint{
MetricsName: metric.Name,
MetricsTags: labels,
MetricsValue: map[string]interface{}{
"value": metric.GetValue(),
},
MetricsTimestamp: dataBatch.Timestamp.UTC(),
}
err := sink.ProduceKafkaMessage(point)
if err != nil {
glog.Errorf("Failed to produce metric message: %s", err)
}
}
}
}
func NewKafkaSink(uri *url.URL) (core.DataSink, error) {
client, err := kafka_common.NewKafkaClient(uri, kafka_common.TimeSeriesTopic)
if err != nil {
return nil, err
}
return &kafkaSink{
KafkaClient: client,
}, nil
}