⚡ uzap

This repo contains basic configuration for go.uber.org/zap, for easy use with 12-factor apps.

Usage

defer uzap.MustZap()()

Example:

import (
	"go.uber.org/zap"
	"github.com/Unity-Technologies/uzap"
)

// For ease of use, call this in main(), as the first statement
defer uzap.MustZap()()

// Example
zap.L().Info("failed to fetch URL",
	// Structured context as strongly typed Field values.
	zap.String("url", url),
	zap.Int("attempt", 3),
	zap.Duration("backoff", time.Second),
)
log.Println("std log example")

Customizable examble

logger, level := uzap.NewZapLogger(&uzap.Options{})
zap.ReplaceGlobals(logger)
zap.RedirectStdLog(logger)
defer logger.Sync() // nolint:errcheck

Features

On it's own this does mostly nothing, go.uber.org/zap is the logger, this just makes a few assumptions about how you'd use zap to make it even easier.

• It uses a global variable to reference the logger, which allows it to be used from anywhere without prior knowledge, ie. just call zap.L() without worrying about the details.
• It has a one-liner for ease of use.
• It sends informational logs to stdout and higher priority logs to stderr, which is needed for production-ready kubernetes logging.
• It encodes the output in a stackdriver friendly (but not overly specific) (json) format.
• It has an atomic log level, so it can be safely modified from anywhere.
• It optionally supports a human friendly debug output.
• It reads config from environment variables (can be changed/overridden afterwards).