How can I create custom loggers using Logrus?

How can I create custom loggers using Logrus?

To create custom loggers in Logrus, you can define a new logger instance and set its properties like level and formatter.

Can you show me a code example for that?

Sure! Here's a simple example:

import (
    "github.com/sirupsen/logrus"
)

func main() {
    customLogger := logrus.New()
    customLogger.SetLevel(logrus.InfoLevel)
    customLogger.SetFormatter(&logrus.TextFormatter{})

    customLogger.Info("This is a custom log message")
}

What if I want to log to a file instead?

You can set the output of the logger to a file like this:

file, err := os.OpenFile("logfile.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
if err == nil {
    customLogger.SetOutput(file)
} else {
    logrus.Info("Failed to log to file, using default stderr")
}

Can I add fields to my log messages?

Yes, you can add fields using the WithFields method:

customLogger.WithFields(logrus.Fields{
    "user": "john",
    "action": "login",
}).Info("User logged in")