feat: initial implementation of container management platform

internal/database/postgres.go

@@ -0,0 +1,59 @@
+package database
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"time"
+
+	_ "github.com/lib/pq"
+)
+
+type DB struct {
+	*sql.DB
+}
+
+type DBConfig struct {
+	MaxOpenConns    int
+	MaxIdleConns    int
+	ConnMaxLifetime time.Duration
+	ConnMaxIdleTime time.Duration
+}
+
+func NewConnection(databaseURL string) (*DB, error) {
+	return NewConnectionWithConfig(databaseURL, DBConfig{
+		MaxOpenConns:    25,
+		MaxIdleConns:    25,
+		ConnMaxLifetime: 5 * time.Minute,
+		ConnMaxIdleTime: 5 * time.Minute,
+	})
+}
+
+func NewConnectionWithConfig(databaseURL string, config DBConfig) (*DB, error) {
+	db, err := sql.Open("postgres", databaseURL)
+	if err != nil {
+		return nil, fmt.Errorf("unable to open database: %w", err)
+	}
+
+	// Configure connection pool
+	db.SetMaxOpenConns(config.MaxOpenConns)
+	db.SetMaxIdleConns(config.MaxIdleConns)
+	db.SetConnMaxLifetime(config.ConnMaxLifetime)
+	db.SetConnMaxIdleTime(config.ConnMaxIdleTime)
+
+	// Test the connection
+	if err := db.PingContext(context.Background()); err != nil {
+		return nil, fmt.Errorf("unable to ping database: %w", err)
+	}
+
+	return &DB{DB: db}, nil
+}
+
+func (db *DB) Health(ctx context.Context) error {
+	return db.PingContext(ctx)
+}
+
+// Stats returns connection pool statistics for monitoring
+func (db *DB) Stats() sql.DBStats {
+	return db.Stats()
+}