How do I configure Zerolog for my Go application?

How do I configure Zerolog for my Go application?

To configure Zerolog, you need to import the package and set up a logger. Here's a basic example:

import (
    "github.com/rs/zerolog"
    "os"
)

func main() {
    // Set the log level
    zerolog.SetGlobalLevel(zerolog.InfoLevel)

    // Create a logger
    logger := zerolog.New(os.Stdout).With().Timestamp().Logger()

    // Log a message
    logger.Info().Msg("Zerolog is configured!")
}

Can I log to a file instead of stdout?

Yes, you can log to a file by creating a file writer. Here's how:

file, err := os.OpenFile("logfile.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
if err != nil {
    logger.Fatal().Err(err).Msg("Failed to open log file")
}
logger := zerolog.New(file).With().Timestamp().Logger()

How do I set different log levels?

You can set different log levels using the SetGlobalLevel function. For example:

zerolog.SetGlobalLevel(zerolog.DebugLevel)

This will log all messages at the Debug level and above.

Can I format the log output?

Yes, you can format the output by using different writers or by customizing the logger. For JSON output, you can use:

logger := zerolog.New(os.Stdout).Output(zerolog.ConsoleWriter{Out: os.Stdout}).With().Timestamp().Logger()