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https://github.com/kubernetes-sigs/prometheus-adapter.git
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fe0859aa5c
Notable next steps include: * Intelligently select the aggregation method (rate/avg_over_time/etc). * Intelligenty select the aggregation window. * Figure out how to handle "namespace", if at all. * Fix the crazy type conversion in `sample_converter.go`.
53 lines
1.7 KiB
Go
53 lines
1.7 KiB
Go
package provider
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import (
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"github.com/prometheus/common/model"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/metrics/pkg/apis/external_metrics"
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)
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type sampleConverter struct {
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}
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//SampleConverter is capable of translating Prometheus Sample objects
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//into ExternamMetricValue objects.
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type SampleConverter interface {
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Convert(metadata QueryMetadata, sample *model.Sample) (*external_metrics.ExternalMetricValue, error)
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}
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//NewSampleConverter creates a SampleConverter capable of translating Prometheus Sample objects
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//into ExternamMetricValue objects.
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func NewSampleConverter() SampleConverter {
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return &sampleConverter{}
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}
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func (c *sampleConverter) Convert(metadata QueryMetadata, sample *model.Sample) (*external_metrics.ExternalMetricValue, error) {
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labels := c.convertLabels(sample.Metric)
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singleMetric := external_metrics.ExternalMetricValue{
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MetricName: string(sample.Metric[model.LabelName("__name__")]),
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Timestamp: metav1.Time{
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sample.Timestamp.Time(),
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},
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WindowSeconds: &metadata.WindowInSeconds,
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//TODO: I'm not so sure about this type/conversions.
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//This can't possibly be the right way to convert this.
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//Also, does K8S only deal win integer metrics?
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Value: *resource.NewQuantity(int64(float64(sample.Value)), resource.DecimalSI),
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MetricLabels: labels,
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}
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//TODO: Actual errors?
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return &singleMetric, nil
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}
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func (c *sampleConverter) convertLabels(inLabels model.Metric) map[string]string {
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numLabels := len(inLabels)
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outLabels := make(map[string]string, numLabels)
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for labelName, labelVal := range inLabels {
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outLabels[string(labelName)] = string(labelVal)
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}
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return outLabels
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}
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