We use op/logging [link] for logs now. One of its many features is printing out the time the message was logged:

credit: github.com/op/go-logging credit: github.com/op/go-logging

The only thing is, when starting our binary as a systemd service we see logs with journalct who already adds the timestamp on its own, we get a double timestamp. Fortunately, we can avoid it by checking if stdout file descriptor is a tty or not.

Like so (credit: github.com/mattn/go-isatty):

package main

import (

func main() {
	if isatty.IsTerminal(os.Stdout.Fd()) {
		fmt.Println("Is Terminal")
	} else {
		fmt.Println("Is Not Terminal")

Happy logging!