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promsum.go
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promsum.go
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package operator
import (
"context"
"fmt"
"time"
prom "github.com/prometheus/client_golang/api/prometheus/v1"
"github.com/prometheus/client_golang/prometheus"
"github.com/sirupsen/logrus"
"golang.org/x/sync/errgroup"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
metering "github.com/operator-framework/operator-metering/pkg/apis/metering/v1"
"github.com/operator-framework/operator-metering/pkg/operator/prestostore"
"github.com/operator-framework/operator-metering/pkg/operator/reportingutil"
)
const (
prometheusMetricNamespace = "metering"
)
var (
prometheusReportDatasourceLabels = []string{
"reportdatasource",
"namespace",
"table_name",
}
prometheusReportDatasourceMetricsScrapedCounter = prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: prometheusMetricNamespace,
Name: "prometheus_reportdatasource_metrics_scraped_total",
Help: "Number of Prometheus metrics returned by a PrometheusQuery for a ReportDataSource.",
},
prometheusReportDatasourceLabels,
)
prometheusReportDatasourceMetricsImportedCounter = prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: prometheusMetricNamespace,
Name: "prometheus_reportdatasource_metrics_imported_total",
Help: "Number of Prometheus ReportDatasource metrics imported.",
},
prometheusReportDatasourceLabels,
)
prometheusReportDatasourceTotalImportsCounter = prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: prometheusMetricNamespace,
Name: "prometheus_reportdatasource_imports_total",
Help: "Number of Prometheus ReportDatasource metrics imports.",
},
prometheusReportDatasourceLabels,
)
prometheusReportDatasourceFailedImportsCounter = prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: prometheusMetricNamespace,
Name: "prometheus_reportdatasource_failed_imports_total",
Help: "Number of failed Prometheus ReportDatasource metrics imports.",
},
prometheusReportDatasourceLabels,
)
prometheusReportDatasourceTotalPrometheusQueriesCounter = prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: prometheusMetricNamespace,
Name: "prometheus_reportdatasource_prometheus_queries_total",
Help: "Number of Prometheus ReportDatasource Prometheus queries made for the ReportDataSource since start up.",
},
prometheusReportDatasourceLabels,
)
prometheusReportDatasourceFailedPrometheusQueriesCounter = prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: prometheusMetricNamespace,
Name: "prometheus_reportdatasource_failed_prometheus_queries_total",
Help: "Number of failed Prometheus ReportDatasource Prometheus queries made for the ReportDataSource since start up.",
},
prometheusReportDatasourceLabels,
)
prometheusReportDatasourceTotalPrestoStoresCounter = prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: prometheusMetricNamespace,
Name: "prometheus_reportdatasource_presto_stores_total",
Help: "Number of Prometheus ReportDatasource calls to store all metrics collected into Presto.",
},
prometheusReportDatasourceLabels,
)
prometheusReportDatasourceFailedPrestoStoresCounter = prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: prometheusMetricNamespace,
Name: "prometheus_reportdatasource_failed_presto_stores_total",
Help: "Number of failed Prometheus ReportDatasource calls to store all metrics collected into Presto.",
},
prometheusReportDatasourceLabels,
)
prometheusReportDatasourceImportDurationHistogram = prometheus.NewHistogramVec(
prometheus.HistogramOpts{
Namespace: prometheusMetricNamespace,
Name: "prometheus_reportdatasource_import_duration_seconds",
Help: "Duration to import Prometheus metrics into Presto.",
Buckets: []float64{30.0, 60.0, 300.0},
},
prometheusReportDatasourceLabels,
)
prometheusReportDatasourcePrometheusQueryDurationHistogram = prometheus.NewHistogramVec(
prometheus.HistogramOpts{
Namespace: prometheusMetricNamespace,
Name: "prometheus_reportdatasource_prometheus_query_duration_seconds",
Help: "Duration for a Prometheus query to return metrics to reporting-operator.",
Buckets: []float64{2.0, 10.0, 30.0, 60.0},
},
prometheusReportDatasourceLabels,
)
prometheusReportDatasourcePrestoreStoreDurationHistogram = prometheus.NewHistogramVec(
prometheus.HistogramOpts{
Namespace: prometheusMetricNamespace,
Name: "prometheus_reportdatasource_presto_store_duration_seconds",
Help: "Duration to store all metrics fetched into Presto.",
Buckets: []float64{2.0, 10.0, 30.0, 60.0, 300.0},
},
prometheusReportDatasourceLabels,
)
prometheusReportDatasourceRunningImportsGauge = prometheus.NewGauge(
prometheus.GaugeOpts{
Namespace: prometheusMetricNamespace,
Name: "prometheus_reportdatasource_running_imports",
Help: "Number of Prometheus ReportDatasource imports currently running.",
},
)
)
func init() {
prometheus.MustRegister(prometheusReportDatasourceMetricsScrapedCounter)
prometheus.MustRegister(prometheusReportDatasourceMetricsImportedCounter)
prometheus.MustRegister(prometheusReportDatasourceTotalImportsCounter)
prometheus.MustRegister(prometheusReportDatasourceFailedImportsCounter)
prometheus.MustRegister(prometheusReportDatasourceTotalPrometheusQueriesCounter)
prometheus.MustRegister(prometheusReportDatasourceFailedPrometheusQueriesCounter)
prometheus.MustRegister(prometheusReportDatasourceTotalPrestoStoresCounter)
prometheus.MustRegister(prometheusReportDatasourceFailedPrestoStoresCounter)
prometheus.MustRegister(prometheusReportDatasourceImportDurationHistogram)
prometheus.MustRegister(prometheusReportDatasourcePrometheusQueryDurationHistogram)
prometheus.MustRegister(prometheusReportDatasourcePrestoreStoreDurationHistogram)
prometheus.MustRegister(prometheusReportDatasourceRunningImportsGauge)
}
type prometheusImporterFunc func(ctx context.Context, namespace, dsName string, start, end time.Time) ([]*prometheusImportResults, error)
type prometheusImportResults struct {
ReportDataSource string `json:"reportDataSource"`
Namespace string `json:"namespace"`
MetricsImportedCount int `json:"metricsImportedCount"`
}
func (op *Reporting) importPrometheusForTimeRange(ctx context.Context, namespace, dsName string, start, end time.Time) ([]*prometheusImportResults, error) {
reportDataSources, err := op.meteringClient.MeteringV1().ReportDataSources(namespace).List(metav1.ListOptions{})
if err != nil {
return nil, err
}
logger := op.logger.WithField("component", "importPrometheusForTimeRange")
const concurrency = 4
// create a channel to act as a semaphore to limit the number of
// imports happening in parallel
semaphore := make(chan struct{}, concurrency)
resultsCh := make(chan *prometheusImportResults)
g, ctx := errgroup.WithContext(ctx)
var reportDataSourcesToImport []*metering.ReportDataSource
for _, reportDataSource := range reportDataSources.Items {
if reportDataSource.Spec.PrometheusMetricsImporter == nil {
continue
}
if dsName != "" && dsName != reportDataSource.Name {
continue
}
if reportDataSource.Status.TableRef.Name == "" {
return nil, fmt.Errorf("ReportDataSource %s has no table created yet", reportDataSource.Name)
}
reportDataSourcesToImport = append(reportDataSourcesToImport, reportDataSource)
}
for _, reportDataSource := range reportDataSourcesToImport {
reportDataSource := reportDataSource
// collect each dataSource concurrently
g.Go(func() error {
prestoTable, err := op.prestoTableLister.PrestoTables(reportDataSource.Namespace).Get(reportDataSource.Status.TableRef.Name)
if err != nil {
return fmt.Errorf("unable to get PrestoTable %s for ReportDataSource %s, %s", reportDataSource.Status.TableRef, reportDataSource.Name, err)
}
importCfg, err := op.newPromImporterCfg(reportDataSource, reportDataSource.Spec.PrometheusMetricsImporter.Query, prestoTable)
if err != nil {
return err
}
dataSourceLogger := logger.WithFields(logrus.Fields{
"reportDataSource": reportDataSource.Name,
"tableName": importCfg.PrestoTableName,
})
// ignore any global ImportFrom configuration since this is an
// on-demand import
importCfg.ImportFromTime = nil
metricsCollectors := op.newPromImporterMetricsCollectors(reportDataSource, prestoTable, importCfg)
select {
case semaphore <- struct{}{}:
case <-ctx.Done():
return ctx.Err()
}
// decrement the semaphore at the end
defer func() {
<-semaphore
}()
var promConn prom.API
if (reportDataSource.Spec.PrometheusMetricsImporter.PrometheusConfig != nil) && (reportDataSource.Spec.PrometheusMetricsImporter.PrometheusConfig.URL != "") {
promConn, err = op.newPrometheusConnFromURL(reportDataSource.Spec.PrometheusMetricsImporter.PrometheusConfig.URL)
if err != nil {
return err
}
} else {
promConn = op.promConn
}
importResults, err := prestostore.ImportFromTimeRange(dataSourceLogger, op.clock, promConn, op.prometheusMetricsRepo, metricsCollectors, ctx, start, end, importCfg)
if err != nil {
return fmt.Errorf("error importing Prometheus data for ReportDataSource %s: %v", reportDataSource.Name, err)
}
resultsCh <- &prometheusImportResults{
ReportDataSource: reportDataSource.Name,
Namespace: reportDataSource.Namespace,
MetricsImportedCount: len(importResults.Metrics),
}
return nil
})
}
go func() {
g.Wait()
close(resultsCh)
}()
var results []*prometheusImportResults
for importResults := range resultsCh {
results = append(results, importResults)
}
return results, g.Wait()
}
func (op *Reporting) getQueryIntervalForReportDataSource(reportDataSource *metering.ReportDataSource) time.Duration {
queryConf := reportDataSource.Spec.PrometheusMetricsImporter.QueryConfig
queryInterval := op.cfg.PrometheusQueryConfig.QueryInterval.Duration
if queryConf != nil {
if queryConf.QueryInterval != nil {
queryInterval = queryConf.QueryInterval.Duration
}
}
return queryInterval
}
func (op *Reporting) newPromImporterCfg(reportDataSource *metering.ReportDataSource, query string, prestoTable *metering.PrestoTable) (prestostore.Config, error) {
chunkSize := op.cfg.PrometheusQueryConfig.ChunkSize.Duration
stepSize := op.cfg.PrometheusQueryConfig.StepSize.Duration
queryConf := reportDataSource.Spec.PrometheusMetricsImporter.QueryConfig
if queryConf != nil {
if queryConf.ChunkSize != nil {
chunkSize = queryConf.ChunkSize.Duration
}
if queryConf.StepSize != nil {
stepSize = queryConf.StepSize.Duration
}
}
// round to the nearest second for chunk/step sizes
chunkSize = chunkSize.Truncate(time.Second)
stepSize = stepSize.Truncate(time.Second)
// Keep a cap on the number of time ranges we query per reconciliation.
// If we get to defaultMaxPromTimeRanges, it means we're very backlogged,
// or we have a small chunkSize and making tons of small queries all one
// after another will cause undesired resource spikes, or both. This will
// make it take longer to catch up, but should help prevent memory from
// exploding when we end up with a ton of time ranges.
// defaultMaxPromTimeRanges is the max number of Prometheus queries and the
// max amount of StorePrometheusMetrics calls (roughly equivalent to presto
// queries) we make in a single import. We set it to the number of queries
// it would take to chunk up our MaxQueryRangeDuration.
defaultMaxPromTimeRanges := int64(op.cfg.PrometheusDataSourceMaxQueryRangeDuration / chunkSize)
tableName, err := reportingutil.FullyQualifiedTableName(prestoTable)
if err != nil {
return prestostore.Config{}, err
}
return prestostore.Config{
PrometheusQuery: query,
PrestoTableName: tableName,
ChunkSize: chunkSize,
StepSize: stepSize,
MaxTimeRanges: defaultMaxPromTimeRanges,
MaxQueryRangeDuration: op.cfg.PrometheusDataSourceMaxQueryRangeDuration,
MaxBackfillImportDuration: op.cfg.PrometheusDataSourceMaxBackfillImportDuration,
ImportFromTime: op.cfg.PrometheusDataSourceGlobalImportFromTime,
}, nil
}
func (op *Reporting) newPromImporter(logger logrus.FieldLogger, reportDataSource *metering.ReportDataSource, prestoTable *metering.PrestoTable, cfg prestostore.Config) (*prestostore.PrometheusImporter, error) {
metricsCollectors := op.newPromImporterMetricsCollectors(reportDataSource, prestoTable, cfg)
var promConn prom.API
var err error
if (reportDataSource.Spec.PrometheusMetricsImporter.PrometheusConfig != nil) && (reportDataSource.Spec.PrometheusMetricsImporter.PrometheusConfig.URL != "") {
promConn, err = op.newPrometheusConnFromURL(reportDataSource.Spec.PrometheusMetricsImporter.PrometheusConfig.URL)
if err != nil {
return nil, err
}
} else {
promConn = op.promConn
}
return prestostore.NewPrometheusImporter(logger, promConn, op.prometheusMetricsRepo, op.clock, cfg, metricsCollectors), nil
}
func (op *Reporting) newPromImporterMetricsCollectors(reportDataSource *metering.ReportDataSource, prestoTable *metering.PrestoTable, cfg prestostore.Config) prestostore.ImporterMetricsCollectors {
promLabels := prometheus.Labels{
"reportdatasource": reportDataSource.Name,
"namespace": reportDataSource.Namespace,
"table_name": cfg.PrestoTableName,
}
totalImportsCounter := prometheusReportDatasourceTotalImportsCounter.With(promLabels)
failedImportsCounter := prometheusReportDatasourceFailedImportsCounter.With(promLabels)
totalPrometheusQueriesCounter := prometheusReportDatasourceTotalPrometheusQueriesCounter.With(promLabels)
failedPrometheusQueriesCounter := prometheusReportDatasourceFailedPrometheusQueriesCounter.With(promLabels)
totalPrestoStoresCounter := prometheusReportDatasourceTotalPrestoStoresCounter.With(promLabels)
failedPrestoStoresCounter := prometheusReportDatasourceFailedPrestoStoresCounter.With(promLabels)
promQueryMetricsScrapedCounter := prometheusReportDatasourceMetricsScrapedCounter.With(promLabels)
promQueryDurationHistogram := prometheusReportDatasourcePrometheusQueryDurationHistogram.With(promLabels)
metricsImportedCounter := prometheusReportDatasourceMetricsImportedCounter.With(promLabels)
importDurationHistogram := prometheusReportDatasourceImportDurationHistogram.With(promLabels)
prestoStoreDurationHistogram := prometheusReportDatasourcePrestoreStoreDurationHistogram.With(promLabels)
return prestostore.ImporterMetricsCollectors{
TotalImportsCounter: totalImportsCounter,
FailedImportsCounter: failedImportsCounter,
ImportDurationHistogram: importDurationHistogram,
ImportsRunningGauge: prometheusReportDatasourceRunningImportsGauge,
TotalPrometheusQueriesCounter: totalPrometheusQueriesCounter,
FailedPrometheusQueriesCounter: failedPrometheusQueriesCounter,
PrometheusQueryDurationHistogram: promQueryDurationHistogram,
TotalPrestoStoresCounter: totalPrestoStoresCounter,
FailedPrestoStoresCounter: failedPrestoStoresCounter,
PrestoStoreDurationHistogram: prestoStoreDurationHistogram,
MetricsScrapedCounter: promQueryMetricsScrapedCounter,
MetricsImportedCounter: metricsImportedCounter,
}
}