How can monitoring and troubleshooting database connection issues be implemented?

For monitoring and diagnosing database connection issues in Go, the following approaches can be used:

• Logging connection errors with detailed information.
• Using contexts (context.Context) with timeouts to control connection wait times.
• Periodic checking of connection status (ping) with the database.
• Metrics and alerts through Prometheus or other monitoring systems.

Example of a simple database ping with error logging:

ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
err := db.PingContext(ctx)
if err != nil {
    log.Printf("Database connection error: %v", err)
}

This approach helps quickly identify and respond to connection problems.