mirror of
https://github.com/kubernetes-sigs/prometheus-adapter.git
synced 2026-04-07 22:25:03 +00:00
9641e70005
Fixed: * `basicMetricLister` wasn't applying the appropriate start time because I had forgotten to set the `lookback`. There are still a number of issues: * The `externalPrometheusProvider` is not hooked up to the web application yet, so it doesn't serve requests. * The namespace and label approach used in `external_info_map.go` is horrifically incorrect. It doesn't appropriately store multiple series with the same name but different labels. * The configuration is still not updated to appropriately handle external metrics, it's sort of half-piggy-backing on the pre-existing work.
55 lines
1.6 KiB
Go
55 lines
1.6 KiB
Go
package provider
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import (
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"errors"
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prom "github.com/directxman12/k8s-prometheus-adapter/pkg/client"
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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 scalarConverter struct {
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}
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//NewScalarConverter creates a ScalarConverter capable of converting
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//scalar Prometheus query results into external metric types.
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func NewScalarConverter() MetricConverter {
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return &scalarConverter{}
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}
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func (c *scalarConverter) Convert(queryResult prom.QueryResult) (*external_metrics.ExternalMetricValueList, error) {
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if queryResult.Type != model.ValScalar {
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return nil, errors.New("scalarConverter can only convert scalar query results")
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}
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toConvert := queryResult.Scalar
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if toConvert == nil {
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return nil, errors.New("the provided input did not contain scalar query results")
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}
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return c.convert(toConvert)
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}
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func (c *scalarConverter) convert(input *model.Scalar) (*external_metrics.ExternalMetricValueList, error) {
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result := external_metrics.ExternalMetricValueList{
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//Using prometheusProvider.metricsFor(...) as an example,
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//it seems that I don't need to provide values for
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//TypeMeta and ListMeta.
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//TODO: Get some confirmation on this.
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Items: []external_metrics.ExternalMetricValue{
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{
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Timestamp: metav1.Time{
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input.Timestamp.Time(),
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},
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//TODO: I'm not so sure about this type/conversions.
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//Is there a meaningful loss of precision here?
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//Does K8S only deal win integer metrics?
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Value: *resource.NewMilliQuantity(int64(input.Value*1000.0), resource.DecimalSI),
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},
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},
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}
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return &result, nil
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}
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