log

Package log contains utilities for fetching a new logger when one is not already available.

1. This package contains a root logr.Logger Log.
2. The sub-package zap provides helpers for setting up logr backed by Zap (go.uber.org/zap).

logr

zap

1. Use Zap.Options

   opts := zap.Options{
       Development: true,
       TimeEncoder:  zapcore.ISO8601TimeEncoder,
   }
   opts.BindFlags(flag.CommandLine)
   flag.Parse()
   ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
   

2. Give arguments

   go run main.go -h
   Usage of /var/folders/c2/hjlk2kcn63s4kds9k2_ctdhc0000gp/T/go-build3844265895/b001/exe/main:
     -kubeconfig string
           Paths to a kubeconfig. Only required if out-of-cluster.
     -zap-devel
           Development Mode defaults(encoder=consoleEncoder,logLevel=Debug,stackTraceLevel=Warn). Production Mode defaults(encoder=jsonEncoder,logLevel=Info,stackTraceLevel=Error) (default true)
     -zap-encoder value
           Zap log encoding (one of 'json' or 'console')
     -zap-log-level value
           Zap Level to configure the verbosity of logging. Can be one of 'debug', 'info', 'error', or any integer value > 0 which corresponds to custom debug levels of increasing verbosity
     -zap-stacktrace-level value
           Zap Level at and above which stacktraces are captured (one of 'info', 'error', 'panic').
     -zap-time-encoding value
           Zap time encoding (one of 'epoch', 'millis', 'nano', 'iso8601', 'rfc3339' or 'rfc3339nano'). Defaults to 'epoch'.
   

   go run main.go -zap-time-encoding epoch