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helper.go
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helper.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.
// Copyright 2018-2019 VMware, Inc. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package processors
import (
"fmt"
"github.com/wavefronthq/wavefront-collector-for-kubernetes/internal/metrics"
)
func aggregate(src, dst *metrics.Set, metricsToAggregate []string) error {
for _, metricName := range metricsToAggregate {
metricValue, found := src.Values[metricName]
if !found {
continue
}
aggregatedValue, found := dst.Values[metricName]
if found {
if aggregatedValue.ValueType != metricValue.ValueType {
return fmt.Errorf("aggregator: type not supported in %s", metricName)
}
if aggregatedValue.ValueType == metrics.ValueInt64 {
aggregatedValue.IntValue += metricValue.IntValue
} else if aggregatedValue.ValueType == metrics.ValueFloat {
aggregatedValue.FloatValue += metricValue.FloatValue
} else {
return fmt.Errorf("aggregator: type not supported in %s", metricName)
}
} else {
aggregatedValue = metricValue
}
dst.Values[metricName] = aggregatedValue
}
return nil
}
// aggregates the count of pods or containers by node, namespace and cluster.
// If the source already has aggregated counts (by namespace for example), they are used to get the counts per cluster.
// If the source does not have any counts, we increment the dest count by 1 assuming this method is invoked once per pod/container.
func aggregateCount(src, dst *metrics.Set, metricName string) {
srcCount := int64(0)
if count, found := src.Values[metricName]; found {
srcCount += count.IntValue
} else {
srcCount = 1
}
dstCount, found := dst.Values[metricName]
if found {
dstCount.IntValue += srcCount
} else {
dstCount = metrics.Value{
IntValue: srcCount,
}
}
dst.Values[metricName] = dstCount
}