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pg_replication_slot: add slot type label (#960)

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Signed-off-by: Alex Simenduev <shamil.si@gmail.com>
This commit is contained in:
Alex Simenduev 2023-11-23 10:44:58 +02:00 committed by GitHub
parent f0ea0163bb
commit ae1375b28e
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 35 additions and 29 deletions
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22
collector/pg_replication_slot.go
View File

@ -43,7 +43,7 @@ var (
"slot_current_wal_lsn", "slot_current_wal_lsn",
), ),
"current wal lsn value", "current wal lsn value",
[]string{"slot_name"}, nil, []string{"slot_name", "slot_type"}, nil,
) )
pgReplicationSlotCurrentFlushDesc = prometheus.NewDesc( pgReplicationSlotCurrentFlushDesc = prometheus.NewDesc(
prometheus.BuildFQName( prometheus.BuildFQName(
@ -52,7 +52,7 @@ var (
"slot_confirmed_flush_lsn", "slot_confirmed_flush_lsn",
), ),
"last lsn confirmed flushed to the replication slot", "last lsn confirmed flushed to the replication slot",
[]string{"slot_name"}, nil, []string{"slot_name", "slot_type"}, nil,
) )
pgReplicationSlotIsActiveDesc = prometheus.NewDesc( pgReplicationSlotIsActiveDesc = prometheus.NewDesc(
prometheus.BuildFQName( prometheus.BuildFQName(
@ -61,17 +61,18 @@ var (
"slot_is_active", "slot_is_active",
), ),
"whether the replication slot is active or not", "whether the replication slot is active or not",
[]string{"slot_name"}, nil, []string{"slot_name", "slot_type"}, nil,
) )
pgReplicationSlotQuery = `SELECT pgReplicationSlotQuery = `SELECT
slot_name, slot_name,
slot_type,
CASE WHEN pg_is_in_recovery() THEN CASE WHEN pg_is_in_recovery() THEN
pg_last_wal_receive_lsn() - '0/0' pg_last_wal_receive_lsn() - '0/0'
ELSE ELSE
pg_current_wal_lsn() - '0/0' pg_current_wal_lsn() - '0/0'
END AS current_wal_lsn, END AS current_wal_lsn,
COALESCE(confirmed_flush_lsn, '0/0') - '0/0', COALESCE(confirmed_flush_lsn, '0/0') - '0/0' AS confirmed_flush_lsn,
active active
FROM pg_replication_slots;` FROM pg_replication_slots;`
) )
@ -87,10 +88,11 @@ func (PGReplicationSlotCollector) Update(ctx context.Context, instance *instance
for rows.Next() { for rows.Next() {
var slotName sql.NullString var slotName sql.NullString
var slotType sql.NullString
var walLSN sql.NullFloat64 var walLSN sql.NullFloat64
var flushLSN sql.NullFloat64 var flushLSN sql.NullFloat64
var isActive sql.NullBool var isActive sql.NullBool
if err := rows.Scan(&slotName, &walLSN, &flushLSN, &isActive); err != nil { if err := rows.Scan(&slotName, &slotType, &walLSN, &flushLSN, &isActive); err != nil {
return err return err
} }
@ -102,6 +104,10 @@ func (PGReplicationSlotCollector) Update(ctx context.Context, instance *instance
if slotName.Valid { if slotName.Valid {
slotNameLabel = slotName.String slotNameLabel = slotName.String
} }
slotTypeLabel := "unknown"
if slotType.Valid {
slotTypeLabel = slotType.String
}
var walLSNMetric float64 var walLSNMetric float64
if walLSN.Valid { if walLSN.Valid {
@ -109,7 +115,7 @@ func (PGReplicationSlotCollector) Update(ctx context.Context, instance *instance
} }
ch <- prometheus.MustNewConstMetric( ch <- prometheus.MustNewConstMetric(
pgReplicationSlotCurrentWalDesc, pgReplicationSlotCurrentWalDesc,
prometheus.GaugeValue, walLSNMetric, slotNameLabel, prometheus.GaugeValue, walLSNMetric, slotNameLabel, slotTypeLabel,
) )
if isActive.Valid && isActive.Bool { if isActive.Valid && isActive.Bool {
var flushLSNMetric float64 var flushLSNMetric float64
@ -118,12 +124,12 @@ func (PGReplicationSlotCollector) Update(ctx context.Context, instance *instance
} }
ch <- prometheus.MustNewConstMetric( ch <- prometheus.MustNewConstMetric(
pgReplicationSlotCurrentFlushDesc, pgReplicationSlotCurrentFlushDesc,
prometheus.GaugeValue, flushLSNMetric, slotNameLabel, prometheus.GaugeValue, flushLSNMetric, slotNameLabel, slotTypeLabel,
) )
} }
ch <- prometheus.MustNewConstMetric( ch <- prometheus.MustNewConstMetric(
pgReplicationSlotIsActiveDesc, pgReplicationSlotIsActiveDesc,
prometheus.GaugeValue, isActiveValue, slotNameLabel, prometheus.GaugeValue, isActiveValue, slotNameLabel, slotTypeLabel,
) )
} }
return rows.Err() return rows.Err()

36
collector/pg_replication_slot_test.go
View File

@ -31,9 +31,9 @@ func TestPgReplicationSlotCollectorActive(t *testing.T) {
inst := &instance{db: db} inst := &instance{db: db}
columns := []string{"slot_name", "current_wal_lsn", "confirmed_flush_lsn", "active"} columns := []string{"slot_name", "slot_type", "current_wal_lsn", "confirmed_flush_lsn", "active"}
rows := sqlmock.NewRows(columns). rows := sqlmock.NewRows(columns).
AddRow("test_slot", 5, 3, true) AddRow("test_slot", "physical", 5, 3, true)
mock.ExpectQuery(sanitizeQuery(pgReplicationSlotQuery)).WillReturnRows(rows) mock.ExpectQuery(sanitizeQuery(pgReplicationSlotQuery)).WillReturnRows(rows)
ch := make(chan prometheus.Metric) ch := make(chan prometheus.Metric)
@ -47,9 +47,9 @@ func TestPgReplicationSlotCollectorActive(t *testing.T) {
}() }()
expected := []MetricResult{ expected := []MetricResult{
{labels: labelMap{"slot_name": "test_slot"}, value: 5, metricType: dto.MetricType_GAUGE}, {labels: labelMap{"slot_name": "test_slot", "slot_type": "physical"}, value: 5, metricType: dto.MetricType_GAUGE},
{labels: labelMap{"slot_name": "test_slot"}, value: 3, metricType: dto.MetricType_GAUGE}, {labels: labelMap{"slot_name": "test_slot", "slot_type": "physical"}, value: 3, metricType: dto.MetricType_GAUGE},
{labels: labelMap{"slot_name": "test_slot"}, value: 1, metricType: dto.MetricType_GAUGE}, {labels: labelMap{"slot_name": "test_slot", "slot_type": "physical"}, value: 1, metricType: dto.MetricType_GAUGE},
} }
convey.Convey("Metrics comparison", t, func() { convey.Convey("Metrics comparison", t, func() {
@ -72,9 +72,9 @@ func TestPgReplicationSlotCollectorInActive(t *testing.T) {
inst := &instance{db: db} inst := &instance{db: db}
columns := []string{"slot_name", "current_wal_lsn", "confirmed_flush_lsn", "active"} columns := []string{"slot_name", "slot_type", "current_wal_lsn", "confirmed_flush_lsn", "active"}
rows := sqlmock.NewRows(columns). rows := sqlmock.NewRows(columns).
AddRow("test_slot", 6, 12, false) AddRow("test_slot", "physical", 6, 12, false)
mock.ExpectQuery(sanitizeQuery(pgReplicationSlotQuery)).WillReturnRows(rows) mock.ExpectQuery(sanitizeQuery(pgReplicationSlotQuery)).WillReturnRows(rows)
ch := make(chan prometheus.Metric) ch := make(chan prometheus.Metric)
@ -88,8 +88,8 @@ func TestPgReplicationSlotCollectorInActive(t *testing.T) {
}() }()
expected := []MetricResult{ expected := []MetricResult{
{labels: labelMap{"slot_name": "test_slot"}, value: 6, metricType: dto.MetricType_GAUGE}, {labels: labelMap{"slot_name": "test_slot", "slot_type": "physical"}, value: 6, metricType: dto.MetricType_GAUGE},
{labels: labelMap{"slot_name": "test_slot"}, value: 0, metricType: dto.MetricType_GAUGE}, {labels: labelMap{"slot_name": "test_slot", "slot_type": "physical"}, value: 0, metricType: dto.MetricType_GAUGE},
} }
convey.Convey("Metrics comparison", t, func() { convey.Convey("Metrics comparison", t, func() {
@ -113,9 +113,9 @@ func TestPgReplicationSlotCollectorActiveNil(t *testing.T) {
inst := &instance{db: db} inst := &instance{db: db}
columns := []string{"slot_name", "current_wal_lsn", "confirmed_flush_lsn", "active"} columns := []string{"slot_name", "slot_type", "current_wal_lsn", "confirmed_flush_lsn", "active"}
rows := sqlmock.NewRows(columns). rows := sqlmock.NewRows(columns).
AddRow("test_slot", 6, 12, nil) AddRow("test_slot", "physical", 6, 12, nil)
mock.ExpectQuery(sanitizeQuery(pgReplicationSlotQuery)).WillReturnRows(rows) mock.ExpectQuery(sanitizeQuery(pgReplicationSlotQuery)).WillReturnRows(rows)
ch := make(chan prometheus.Metric) ch := make(chan prometheus.Metric)
@ -129,8 +129,8 @@ func TestPgReplicationSlotCollectorActiveNil(t *testing.T) {
}() }()
expected := []MetricResult{ expected := []MetricResult{
{labels: labelMap{"slot_name": "test_slot"}, value: 6, metricType: dto.MetricType_GAUGE}, {labels: labelMap{"slot_name": "test_slot", "slot_type": "physical"}, value: 6, metricType: dto.MetricType_GAUGE},
{labels: labelMap{"slot_name": "test_slot"}, value: 0, metricType: dto.MetricType_GAUGE}, {labels: labelMap{"slot_name": "test_slot", "slot_type": "physical"}, value: 0, metricType: dto.MetricType_GAUGE},
} }
convey.Convey("Metrics comparison", t, func() { convey.Convey("Metrics comparison", t, func() {
@ -153,9 +153,9 @@ func TestPgReplicationSlotCollectorTestNilValues(t *testing.T) {
inst := &instance{db: db} inst := &instance{db: db}
columns := []string{"slot_name", "current_wal_lsn", "confirmed_flush_lsn", "active"} columns := []string{"slot_name", "slot_type", "current_wal_lsn", "confirmed_flush_lsn", "active"}
rows := sqlmock.NewRows(columns). rows := sqlmock.NewRows(columns).
AddRow(nil, nil, nil, true) AddRow(nil, nil, nil, nil, true)
mock.ExpectQuery(sanitizeQuery(pgReplicationSlotQuery)).WillReturnRows(rows) mock.ExpectQuery(sanitizeQuery(pgReplicationSlotQuery)).WillReturnRows(rows)
ch := make(chan prometheus.Metric) ch := make(chan prometheus.Metric)
@ -169,9 +169,9 @@ func TestPgReplicationSlotCollectorTestNilValues(t *testing.T) {
}() }()
expected := []MetricResult{ expected := []MetricResult{
{labels: labelMap{"slot_name": "unknown"}, value: 0, metricType: dto.MetricType_GAUGE}, {labels: labelMap{"slot_name": "unknown", "slot_type": "unknown"}, value: 0, metricType: dto.MetricType_GAUGE},
{labels: labelMap{"slot_name": "unknown"}, value: 0, metricType: dto.MetricType_GAUGE}, {labels: labelMap{"slot_name": "unknown", "slot_type": "unknown"}, value: 0, metricType: dto.MetricType_GAUGE},
{labels: labelMap{"slot_name": "unknown"}, value: 1, metricType: dto.MetricType_GAUGE}, {labels: labelMap{"slot_name": "unknown", "slot_type": "unknown"}, value: 1, metricType: dto.MetricType_GAUGE},
} }
convey.Convey("Metrics comparison", t, func() { convey.Convey("Metrics comparison", t, func() {