New: ServiceBase migrated from shortener

database/postgres.go

@@ -0,0 +1,22 @@
+package database
+
+import (
+	"database/sql"
+
+	"github.com/uptrace/opentelemetry-go-extra/otelsql"
+	"go.opentelemetry.io/otel/attribute"
+)
+
+// OpenPostgres establishes a connection to a Postgres database and enables OpenTelemetry tracing and stats reporting.
+func OpenPostgres(dbURL string) (*sql.DB, error) {
+	db, err := otelsql.Open("postgres", dbURL)
+	if err != nil {
+		return nil, err
+	}
+
+	otelsql.ReportDBStatsMetrics(db, otelsql.WithAttributes(
+		attribute.String("db.system", "postgresql"),
+	))
+
+	return db, nil
+}