jacobpascual/postgres_exporter
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Signed-off-by: Zachary Caldarola <zmc2005@gmail.com>
This commit is contained in:
Zachary Caldarola
2023-01-28 17:05:45 -05:00
parent 9b13780d14
commit 600ad185cf
1 changed files with 20 additions and 7 deletions
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19
collector/pg_replication_slots.go → collector/replication_slots.go
View File

@@ -44,14 +44,20 @@ var pgReplicationSlot = map[string]*prometheus.Desc{
"last lsn confirmed flushed to the replication slot",
[]string{"slot_name"}, nil,
),
"is_active": prometheus.NewDesc(
"pg_replication_slot_is_active",
"last lsn confirmed flushed to the replication slot",
[]string{"slot_name"}, nil,
),
}
func (PGReplicationSlotCollector) Update(ctx context.Context, db *sql.DB, ch chan<- prometheus.Metric) error {
rows, err := db.QueryContext(ctx,
`SELECT
slot_name,
pg_current_wal_lsn() AS current_wal_lsn,
confirmed_flush_lsn
pg_current_wal_lsn() - '0/0' AS current_wal_lsn,
coalesce(confirmed_flush_lsn, '0/0') - '0/0',
active
FROM
pg_replication_slots;`)
if err != nil {
@@ -63,7 +69,8 @@ func (PGReplicationSlotCollector) Update(ctx context.Context, db *sql.DB, ch cha
var slot_name string
var wal_lsn int64
var flush_lsn int64
if err := rows.Scan(&slot_name, &wal_lsn, &flush_lsn); err != nil {
var is_active int
if err := rows.Scan(&slot_name, &wal_lsn, &flush_lsn, &is_active); err != nil {
return err
}
@@ -71,11 +78,17 @@ func (PGReplicationSlotCollector) Update(ctx context.Context, db *sql.DB, ch cha
pgReplicationSlot["current_wal_lsn"],
prometheus.GaugeValue, float64(wal_lsn), slot_name,
)
if (is_active == 1) {
ch <- prometheus.MustNewConstMetric(
pgReplicationSlot["confirmed_flush_lsn"],
prometheus.GaugeValue, float64(flush_lsn), slot_name,
)
}
ch <- prometheus.MustNewConstMetric(
pgReplicationSlot["is_active"],
prometheus.GaugeValue, int(flush_lsn), slot_name,
)
}
if err := rows.Err(); err != nil {
return err
}