mirror of
https://github.com/prometheus-community/postgres_exporter
synced 2025-03-18 08:32:01 +00:00
Checkpoint related columns in PG 17 have been moved from pg_stat_bgwriter to pg_stat_checkpointer (#1072)
* Checkpoint related columns in PG 17 have been moved from pg_stat_bgwriter to pg_stat_checkpointer Fix https://github.com/prometheus-community/postgres_exporter/issues/1060 See: https://www.dbi-services.com/blog/postgresql-17-new-catalog-view-pg_stat_checkpointer/ Signed-off-by: Nicolas Rodriguez <nico@nicoladmin.fr> * Add support for pg_stat_checkpointer See: https://www.dbi-services.com/blog/postgresql-17-new-catalog-view-pg_stat_checkpointer/ Signed-off-by: Nicolas Rodriguez <nico@nicoladmin.fr> * Run integration tests with Postgres 17 Signed-off-by: Nicolas Rodriguez <nico@nicoladmin.fr> * Update date in file header Signed-off-by: Nicolas Rodriguez <nico@nicoladmin.fr> --------- Signed-off-by: Nicolas Rodriguez <nico@nicoladmin.fr>
This commit is contained in:
parent
5145620988
commit
bea2609519
@ -63,6 +63,7 @@ workflows:
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- cimg/postgres:14.9
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- cimg/postgres:15.4
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- cimg/postgres:16.0
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- cimg/postgres:17.0
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- prometheus/build:
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name: build
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parallelism: 3
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@ -17,6 +17,7 @@ import (
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"context"
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"database/sql"
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"github.com/blang/semver/v4"
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"github.com/prometheus/client_golang/prometheus"
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)
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@ -101,7 +102,7 @@ var (
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prometheus.Labels{},
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)
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statBGWriterQuery = `SELECT
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statBGWriterQueryBefore17 = `SELECT
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checkpoints_timed
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,checkpoints_req
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,checkpoint_write_time
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@ -114,121 +115,177 @@ var (
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,buffers_alloc
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,stats_reset
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FROM pg_stat_bgwriter;`
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statBGWriterQueryAfter17 = `SELECT
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buffers_clean
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,maxwritten_clean
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,buffers_alloc
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,stats_reset
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FROM pg_stat_bgwriter;`
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)
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func (PGStatBGWriterCollector) Update(ctx context.Context, instance *instance, ch chan<- prometheus.Metric) error {
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db := instance.getDB()
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row := db.QueryRowContext(ctx,
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statBGWriterQuery)
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if instance.version.GE(semver.MustParse("17.0.0")) {
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db := instance.getDB()
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row := db.QueryRowContext(ctx, statBGWriterQueryAfter17)
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var cpt, cpr, bcp, bc, mwc, bb, bbf, ba sql.NullInt64
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var cpwt, cpst sql.NullFloat64
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var sr sql.NullTime
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var bc, mwc, ba sql.NullInt64
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var sr sql.NullTime
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err := row.Scan(&cpt, &cpr, &cpwt, &cpst, &bcp, &bc, &mwc, &bb, &bbf, &ba, &sr)
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if err != nil {
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return err
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}
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err := row.Scan(&bc, &mwc, &ba, &sr)
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if err != nil {
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return err
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}
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cptMetric := 0.0
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if cpt.Valid {
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cptMetric = float64(cpt.Int64)
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bcMetric := 0.0
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if bc.Valid {
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bcMetric = float64(bc.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterBuffersCleanDesc,
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prometheus.CounterValue,
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bcMetric,
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)
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mwcMetric := 0.0
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if mwc.Valid {
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mwcMetric = float64(mwc.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterMaxwrittenCleanDesc,
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prometheus.CounterValue,
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mwcMetric,
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)
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baMetric := 0.0
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if ba.Valid {
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baMetric = float64(ba.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterBuffersAllocDesc,
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prometheus.CounterValue,
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baMetric,
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)
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srMetric := 0.0
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if sr.Valid {
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srMetric = float64(sr.Time.Unix())
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterStatsResetDesc,
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prometheus.CounterValue,
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srMetric,
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)
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} else {
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db := instance.getDB()
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row := db.QueryRowContext(ctx, statBGWriterQueryBefore17)
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var cpt, cpr, bcp, bc, mwc, bb, bbf, ba sql.NullInt64
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var cpwt, cpst sql.NullFloat64
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var sr sql.NullTime
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err := row.Scan(&cpt, &cpr, &cpwt, &cpst, &bcp, &bc, &mwc, &bb, &bbf, &ba, &sr)
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if err != nil {
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return err
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}
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cptMetric := 0.0
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if cpt.Valid {
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cptMetric = float64(cpt.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterCheckpointsTimedDesc,
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prometheus.CounterValue,
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cptMetric,
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)
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cprMetric := 0.0
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if cpr.Valid {
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cprMetric = float64(cpr.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterCheckpointsReqDesc,
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prometheus.CounterValue,
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cprMetric,
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)
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cpwtMetric := 0.0
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if cpwt.Valid {
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cpwtMetric = float64(cpwt.Float64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterCheckpointsReqTimeDesc,
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prometheus.CounterValue,
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cpwtMetric,
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)
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cpstMetric := 0.0
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if cpst.Valid {
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cpstMetric = float64(cpst.Float64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterCheckpointsSyncTimeDesc,
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prometheus.CounterValue,
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cpstMetric,
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)
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bcpMetric := 0.0
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if bcp.Valid {
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bcpMetric = float64(bcp.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterBuffersCheckpointDesc,
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prometheus.CounterValue,
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bcpMetric,
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)
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bcMetric := 0.0
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if bc.Valid {
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bcMetric = float64(bc.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterBuffersCleanDesc,
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prometheus.CounterValue,
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bcMetric,
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)
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mwcMetric := 0.0
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if mwc.Valid {
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mwcMetric = float64(mwc.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterMaxwrittenCleanDesc,
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prometheus.CounterValue,
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mwcMetric,
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)
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bbMetric := 0.0
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if bb.Valid {
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bbMetric = float64(bb.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterBuffersBackendDesc,
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prometheus.CounterValue,
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bbMetric,
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)
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bbfMetric := 0.0
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if bbf.Valid {
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bbfMetric = float64(bbf.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterBuffersBackendFsyncDesc,
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prometheus.CounterValue,
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bbfMetric,
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)
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baMetric := 0.0
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if ba.Valid {
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baMetric = float64(ba.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterBuffersAllocDesc,
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prometheus.CounterValue,
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baMetric,
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)
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srMetric := 0.0
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if sr.Valid {
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srMetric = float64(sr.Time.Unix())
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterStatsResetDesc,
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prometheus.CounterValue,
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srMetric,
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)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterCheckpointsTimedDesc,
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prometheus.CounterValue,
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cptMetric,
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)
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cprMetric := 0.0
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if cpr.Valid {
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cprMetric = float64(cpr.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterCheckpointsReqDesc,
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prometheus.CounterValue,
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cprMetric,
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)
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cpwtMetric := 0.0
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if cpwt.Valid {
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cpwtMetric = float64(cpwt.Float64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterCheckpointsReqTimeDesc,
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prometheus.CounterValue,
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cpwtMetric,
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)
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cpstMetric := 0.0
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if cpst.Valid {
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cpstMetric = float64(cpst.Float64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterCheckpointsSyncTimeDesc,
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prometheus.CounterValue,
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cpstMetric,
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)
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bcpMetric := 0.0
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if bcp.Valid {
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bcpMetric = float64(bcp.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterBuffersCheckpointDesc,
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prometheus.CounterValue,
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bcpMetric,
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)
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bcMetric := 0.0
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if bc.Valid {
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bcMetric = float64(bc.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterBuffersCleanDesc,
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prometheus.CounterValue,
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bcMetric,
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)
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mwcMetric := 0.0
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if mwc.Valid {
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mwcMetric = float64(mwc.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterMaxwrittenCleanDesc,
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prometheus.CounterValue,
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mwcMetric,
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)
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bbMetric := 0.0
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if bb.Valid {
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bbMetric = float64(bb.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterBuffersBackendDesc,
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prometheus.CounterValue,
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bbMetric,
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)
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bbfMetric := 0.0
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if bbf.Valid {
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bbfMetric = float64(bbf.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterBuffersBackendFsyncDesc,
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prometheus.CounterValue,
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bbfMetric,
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)
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baMetric := 0.0
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if ba.Valid {
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baMetric = float64(ba.Int64)
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterBuffersAllocDesc,
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prometheus.CounterValue,
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baMetric,
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)
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srMetric := 0.0
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if sr.Valid {
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srMetric = float64(sr.Time.Unix())
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}
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ch <- prometheus.MustNewConstMetric(
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statBGWriterStatsResetDesc,
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prometheus.CounterValue,
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srMetric,
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)
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return nil
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}
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|
@ -52,7 +52,7 @@ func TestPGStatBGWriterCollector(t *testing.T) {
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rows := sqlmock.NewRows(columns).
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AddRow(354, 4945, 289097744, 1242257, int64(3275602074), 89320867, 450139, 2034563757, 0, int64(2725688749), srT)
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mock.ExpectQuery(sanitizeQuery(statBGWriterQuery)).WillReturnRows(rows)
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mock.ExpectQuery(sanitizeQuery(statBGWriterQueryBefore17)).WillReturnRows(rows)
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ch := make(chan prometheus.Metric)
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go func() {
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@ -113,7 +113,7 @@ func TestPGStatBGWriterCollectorNullValues(t *testing.T) {
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rows := sqlmock.NewRows(columns).
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AddRow(nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil)
|
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mock.ExpectQuery(sanitizeQuery(statBGWriterQuery)).WillReturnRows(rows)
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mock.ExpectQuery(sanitizeQuery(statBGWriterQueryBefore17)).WillReturnRows(rows)
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ch := make(chan prometheus.Metric)
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go func() {
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|
221
collector/pg_stat_checkpointer.go
Normal file
221
collector/pg_stat_checkpointer.go
Normal file
@ -0,0 +1,221 @@
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// Copyright 2024 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
|
||||
// You may obtain a copy of the License at
|
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//
|
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// 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,
|
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// 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.
|
||||
|
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package collector
|
||||
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import (
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||||
"context"
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||||
"database/sql"
|
||||
|
||||
"github.com/prometheus/client_golang/prometheus"
|
||||
)
|
||||
|
||||
const statCheckpointerSubsystem = "stat_checkpointer"
|
||||
|
||||
func init() {
|
||||
// WARNING:
|
||||
// Disabled by default because this set of metrics is only available from Postgres 17
|
||||
registerCollector(statCheckpointerSubsystem, defaultDisabled, NewPGStatCheckpointerCollector)
|
||||
}
|
||||
|
||||
type PGStatCheckpointerCollector struct {
|
||||
}
|
||||
|
||||
func NewPGStatCheckpointerCollector(collectorConfig) (Collector, error) {
|
||||
return &PGStatCheckpointerCollector{}, nil
|
||||
}
|
||||
|
||||
var (
|
||||
statCheckpointerNumTimedDesc = prometheus.NewDesc(
|
||||
prometheus.BuildFQName(namespace, statCheckpointerSubsystem, "num_timed_total"),
|
||||
"Number of scheduled checkpoints due to timeout",
|
||||
[]string{},
|
||||
prometheus.Labels{},
|
||||
)
|
||||
statCheckpointerNumRequestedDesc = prometheus.NewDesc(
|
||||
prometheus.BuildFQName(namespace, statCheckpointerSubsystem, "num_requested_total"),
|
||||
"Number of requested checkpoints that have been performed",
|
||||
[]string{},
|
||||
prometheus.Labels{},
|
||||
)
|
||||
statCheckpointerRestartpointsTimedDesc = prometheus.NewDesc(
|
||||
prometheus.BuildFQName(namespace, statCheckpointerSubsystem, "restartpoints_timed_total"),
|
||||
"Number of scheduled restartpoints due to timeout or after a failed attempt to perform it",
|
||||
[]string{},
|
||||
prometheus.Labels{},
|
||||
)
|
||||
statCheckpointerRestartpointsReqDesc = prometheus.NewDesc(
|
||||
prometheus.BuildFQName(namespace, statCheckpointerSubsystem, "restartpoints_req_total"),
|
||||
"Number of requested restartpoints",
|
||||
[]string{},
|
||||
prometheus.Labels{},
|
||||
)
|
||||
statCheckpointerRestartpointsDoneDesc = prometheus.NewDesc(
|
||||
prometheus.BuildFQName(namespace, statCheckpointerSubsystem, "restartpoints_done_total"),
|
||||
"Number of restartpoints that have been performed",
|
||||
[]string{},
|
||||
prometheus.Labels{},
|
||||
)
|
||||
statCheckpointerWriteTimeDesc = prometheus.NewDesc(
|
||||
prometheus.BuildFQName(namespace, statCheckpointerSubsystem, "write_time_total"),
|
||||
"Total amount of time that has been spent in the portion of processing checkpoints and restartpoints where files are written to disk, in milliseconds",
|
||||
[]string{},
|
||||
prometheus.Labels{},
|
||||
)
|
||||
statCheckpointerSyncTimeDesc = prometheus.NewDesc(
|
||||
prometheus.BuildFQName(namespace, statCheckpointerSubsystem, "sync_time_total"),
|
||||
"Total amount of time that has been spent in the portion of processing checkpoints and restartpoints where files are synchronized to disk, in milliseconds",
|
||||
[]string{},
|
||||
prometheus.Labels{},
|
||||
)
|
||||
statCheckpointerBuffersWrittenDesc = prometheus.NewDesc(
|
||||
prometheus.BuildFQName(namespace, statCheckpointerSubsystem, "buffers_written_total"),
|
||||
"Number of buffers written during checkpoints and restartpoints",
|
||||
[]string{},
|
||||
prometheus.Labels{},
|
||||
)
|
||||
statCheckpointerStatsResetDesc = prometheus.NewDesc(
|
||||
prometheus.BuildFQName(namespace, statCheckpointerSubsystem, "stats_reset_total"),
|
||||
"Time at which these statistics were last reset",
|
||||
[]string{},
|
||||
prometheus.Labels{},
|
||||
)
|
||||
|
||||
statCheckpointerQuery = `SELECT
|
||||
num_timed
|
||||
,num_requested
|
||||
,restartpoints_timed
|
||||
,restartpoints_req
|
||||
,restartpoints_done
|
||||
,write_time
|
||||
,sync_time
|
||||
,buffers_written
|
||||
,stats_reset
|
||||
FROM pg_stat_checkpointer;`
|
||||
)
|
||||
|
||||
func (PGStatCheckpointerCollector) Update(ctx context.Context, instance *instance, ch chan<- prometheus.Metric) error {
|
||||
db := instance.getDB()
|
||||
row := db.QueryRowContext(ctx, statCheckpointerQuery)
|
||||
|
||||
// num_timed = nt = bigint
|
||||
// num_requested = nr = bigint
|
||||
// restartpoints_timed = rpt = bigint
|
||||
// restartpoints_req = rpr = bigint
|
||||
// restartpoints_done = rpd = bigint
|
||||
// write_time = wt = double precision
|
||||
// sync_time = st = double precision
|
||||
// buffers_written = bw = bigint
|
||||
// stats_reset = sr = timestamp
|
||||
|
||||
var nt, nr, rpt, rpr, rpd, bw sql.NullInt64
|
||||
var wt, st sql.NullFloat64
|
||||
var sr sql.NullTime
|
||||
|
||||
err := row.Scan(&nt, &nr, &rpt, &rpr, &rpd, &wt, &st, &bw, &sr)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
ntMetric := 0.0
|
||||
if nt.Valid {
|
||||
ntMetric = float64(nt.Int64)
|
||||
}
|
||||
ch <- prometheus.MustNewConstMetric(
|
||||
statCheckpointerNumTimedDesc,
|
||||
prometheus.CounterValue,
|
||||
ntMetric,
|
||||
)
|
||||
|
||||
nrMetric := 0.0
|
||||
if nr.Valid {
|
||||
nrMetric = float64(nr.Int64)
|
||||
}
|
||||
ch <- prometheus.MustNewConstMetric(
|
||||
statCheckpointerNumRequestedDesc,
|
||||
prometheus.CounterValue,
|
||||
nrMetric,
|
||||
)
|
||||
|
||||
rptMetric := 0.0
|
||||
if rpt.Valid {
|
||||
rptMetric = float64(rpt.Int64)
|
||||
}
|
||||
ch <- prometheus.MustNewConstMetric(
|
||||
statCheckpointerRestartpointsTimedDesc,
|
||||
prometheus.CounterValue,
|
||||
rptMetric,
|
||||
)
|
||||
|
||||
rprMetric := 0.0
|
||||
if rpr.Valid {
|
||||
rprMetric = float64(rpr.Int64)
|
||||
}
|
||||
ch <- prometheus.MustNewConstMetric(
|
||||
statCheckpointerRestartpointsReqDesc,
|
||||
prometheus.CounterValue,
|
||||
rprMetric,
|
||||
)
|
||||
|
||||
rpdMetric := 0.0
|
||||
if rpd.Valid {
|
||||
rpdMetric = float64(rpd.Int64)
|
||||
}
|
||||
ch <- prometheus.MustNewConstMetric(
|
||||
statCheckpointerRestartpointsDoneDesc,
|
||||
prometheus.CounterValue,
|
||||
rpdMetric,
|
||||
)
|
||||
|
||||
wtMetric := 0.0
|
||||
if wt.Valid {
|
||||
wtMetric = float64(wt.Float64)
|
||||
}
|
||||
ch <- prometheus.MustNewConstMetric(
|
||||
statCheckpointerWriteTimeDesc,
|
||||
prometheus.CounterValue,
|
||||
wtMetric,
|
||||
)
|
||||
|
||||
stMetric := 0.0
|
||||
if st.Valid {
|
||||
stMetric = float64(st.Float64)
|
||||
}
|
||||
ch <- prometheus.MustNewConstMetric(
|
||||
statCheckpointerSyncTimeDesc,
|
||||
prometheus.CounterValue,
|
||||
stMetric,
|
||||
)
|
||||
|
||||
bwMetric := 0.0
|
||||
if bw.Valid {
|
||||
bwMetric = float64(bw.Int64)
|
||||
}
|
||||
ch <- prometheus.MustNewConstMetric(
|
||||
statCheckpointerBuffersWrittenDesc,
|
||||
prometheus.CounterValue,
|
||||
bwMetric,
|
||||
)
|
||||
|
||||
srMetric := 0.0
|
||||
if sr.Valid {
|
||||
srMetric = float64(sr.Time.Unix())
|
||||
}
|
||||
ch <- prometheus.MustNewConstMetric(
|
||||
statCheckpointerStatsResetDesc,
|
||||
prometheus.CounterValue,
|
||||
srMetric,
|
||||
)
|
||||
|
||||
return nil
|
||||
}
|
143
collector/pg_stat_checkpointer_test.go
Normal file
143
collector/pg_stat_checkpointer_test.go
Normal file
@ -0,0 +1,143 @@
|
||||
// Copyright 2024 The Prometheus Authors
|
||||
// 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 collector
|
||||
|
||||
import (
|
||||
"context"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/DATA-DOG/go-sqlmock"
|
||||
"github.com/prometheus/client_golang/prometheus"
|
||||
dto "github.com/prometheus/client_model/go"
|
||||
"github.com/smartystreets/goconvey/convey"
|
||||
)
|
||||
|
||||
func TestPGStatCheckpointerCollector(t *testing.T) {
|
||||
db, mock, err := sqlmock.New()
|
||||
if err != nil {
|
||||
t.Fatalf("Error opening a stub db connection: %s", err)
|
||||
}
|
||||
defer db.Close()
|
||||
|
||||
inst := &instance{db: db}
|
||||
|
||||
columns := []string{
|
||||
"num_timed",
|
||||
"num_requested",
|
||||
"restartpoints_timed",
|
||||
"restartpoints_req",
|
||||
"restartpoints_done",
|
||||
"write_time",
|
||||
"sync_time",
|
||||
"buffers_written",
|
||||
"stats_reset"}
|
||||
|
||||
srT, err := time.Parse("2006-01-02 15:04:05.00000-07", "2023-05-25 17:10:42.81132-07")
|
||||
if err != nil {
|
||||
t.Fatalf("Error parsing time: %s", err)
|
||||
}
|
||||
|
||||
rows := sqlmock.NewRows(columns).
|
||||
AddRow(354, 4945, 289097744, 1242257, int64(3275602074), 89320867, 450139, 2034563757, srT)
|
||||
mock.ExpectQuery(sanitizeQuery(statCheckpointerQuery)).WillReturnRows(rows)
|
||||
|
||||
ch := make(chan prometheus.Metric)
|
||||
go func() {
|
||||
defer close(ch)
|
||||
c := PGStatCheckpointerCollector{}
|
||||
|
||||
if err := c.Update(context.Background(), inst, ch); err != nil {
|
||||
t.Errorf("Error calling PGStatCheckpointerCollector.Update: %s", err)
|
||||
}
|
||||
}()
|
||||
|
||||
expected := []MetricResult{
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 354},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 4945},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 289097744},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 1242257},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 3275602074},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 89320867},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 450139},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 2034563757},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 1685059842},
|
||||
}
|
||||
|
||||
convey.Convey("Metrics comparison", t, func() {
|
||||
for _, expect := range expected {
|
||||
m := readMetric(<-ch)
|
||||
convey.So(expect, convey.ShouldResemble, m)
|
||||
}
|
||||
})
|
||||
if err := mock.ExpectationsWereMet(); err != nil {
|
||||
t.Errorf("there were unfulfilled exceptions: %s", err)
|
||||
}
|
||||
}
|
||||
|
||||
func TestPGStatCheckpointerCollectorNullValues(t *testing.T) {
|
||||
db, mock, err := sqlmock.New()
|
||||
if err != nil {
|
||||
t.Fatalf("Error opening a stub db connection: %s", err)
|
||||
}
|
||||
defer db.Close()
|
||||
|
||||
inst := &instance{db: db}
|
||||
|
||||
columns := []string{
|
||||
"num_timed",
|
||||
"num_requested",
|
||||
"restartpoints_timed",
|
||||
"restartpoints_req",
|
||||
"restartpoints_done",
|
||||
"write_time",
|
||||
"sync_time",
|
||||
"buffers_written",
|
||||
"stats_reset"}
|
||||
|
||||
rows := sqlmock.NewRows(columns).
|
||||
AddRow(nil, nil, nil, nil, nil, nil, nil, nil, nil)
|
||||
mock.ExpectQuery(sanitizeQuery(statCheckpointerQuery)).WillReturnRows(rows)
|
||||
|
||||
ch := make(chan prometheus.Metric)
|
||||
go func() {
|
||||
defer close(ch)
|
||||
c := PGStatCheckpointerCollector{}
|
||||
|
||||
if err := c.Update(context.Background(), inst, ch); err != nil {
|
||||
t.Errorf("Error calling PGStatCheckpointerCollector.Update: %s", err)
|
||||
}
|
||||
}()
|
||||
|
||||
expected := []MetricResult{
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
|
||||
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
|
||||
}
|
||||
|
||||
convey.Convey("Metrics comparison", t, func() {
|
||||
for _, expect := range expected {
|
||||
m := readMetric(<-ch)
|
||||
convey.So(expect, convey.ShouldResemble, m)
|
||||
}
|
||||
})
|
||||
if err := mock.ExpectationsWereMet(); err != nil {
|
||||
t.Errorf("there were unfulfilled exceptions: %s", err)
|
||||
}
|
||||
}
|
Loading…
Reference in New Issue
Block a user