Put db info on warning logs

Author: diogonicoleti

gauges/deadtuples.go

@@ -20,11 +20,13 @@ func (g *Gauges) DeadTuples() *prometheus.GaugeVec {
 	}, []string{"table"})
 
 	if !g.hasExtension("pgstattuple") {
-		log.Warn("postgresql_dead_tuples_pct disabled because pgstattuple extension is not installed")
+		log.WithField("db", g.name).
+			Warn("postgresql_dead_tuples_pct disabled because pgstattuple extension is not installed")
 		return gauge
 	}
 	if !g.hasPermissionToExecutePgStatTuple() {
-		log.Warn("postgresql_dead_tuples_pct disabled because user doesn't have permission to use pgstattuple functions")
+		log.WithField("db", g.name).
+			Warn("postgresql_dead_tuples_pct disabled because user doesn't have permission to use pgstattuple functions")
 		return gauge
 	}
 
@@ -56,7 +58,7 @@ func (g *Gauges) DeadTuples() *prometheus.GaugeVec {
 
 func (g *Gauges) hasPermissionToExecutePgStatTuple() bool {
 	if _, err := g.db.Exec("SELECT 1 FROM pgstattuple('pg_class')"); err != nil {
-		log.WithError(err).Error("failed to execute pgstattuple function")
+		log.WithField("db", g.name).WithError(err).Error("failed to execute pgstattuple function")
 		return false
 	}
 	return true

gauges/gauge.go

@@ -152,7 +152,7 @@ func (g *Gauges) queryWithTimeout(
 func (g *Gauges) version() string {
 	var version string
 	if err := g.db.QueryRow("show server_version").Scan(&version); err != nil {
-		log.WithError(err).Error("failed to get postgresql version, assuming 9.6.0")
+		log.WithField("db", g.name).WithError(err).Error("failed to get postgresql version, assuming 9.6.0")
 		return "9.6.0"
 	}
 	return version

gauges/slow_queries.go

@@ -29,11 +29,13 @@ func (g *Gauges) SlowestQueries() *prometheus.GaugeVec {
 		[]string{"query"},
 	)
 	if !g.hasExtension("pg_stat_statements") {
-		log.Warn("postgresql_slowest_queries disabled because pg_stat_statements extension is not installed")
+		log.WithField("db", g.name).
+			Warn("postgresql_slowest_queries disabled because pg_stat_statements extension is not installed")
 		return gauge
 	}
 	if !g.hasSharedPreloadLibrary("pg_stat_statements") {
-		log.Warn("postgresql_slowest_queries disabled because pg_stat_statements is not on shared_preload_libraries")
+		log.WithField("db", g.name).
+			Warn("postgresql_slowest_queries disabled because pg_stat_statements is not on shared_preload_libraries")
 		return gauge
 	}
 	go func() {

gauges/vacuum.go

@@ -113,7 +113,8 @@ func (g *Gauges) VacuumRunningTotal() prometheus.Gauge {
 	`
 
 	if !postgres.Version(g.version()).Is96Or10() {
-		log.Warn("postgresql_vacuum_running_total disabled because it's only supported for PostgreSQL 9.6 or newer versions")
+		log.WithField("db", g.name).
+			Warn("postgresql_vacuum_running_total disabled because it's only supported for PostgreSQL 9.6 or newer versions")
 		return prometheus.NewGauge(gaugeOpts)
 	}
 	return g.new(gaugeOpts, vacuumRunningQuery)