Coder Social home page Coder Social logo

klog's Introduction

klog

klog is a permanent fork of https://github.com/golang/glog.

Why was klog created?

The decision to create klog was one that wasn't made lightly, but it was necessary due to some drawbacks that are present in glog. Ultimately, the fork was created due to glog not being under active development; this can be seen in the glog README:

The code in this repo [...] is not itself under development

This makes us unable to solve many use cases without a fork. The factors that contributed to needing feature development are listed below:

  • glog presents a lot "gotchas" and introduces challenges in containerized environments, all of which aren't well documented.
  • glog doesn't provide an easy way to test logs, which detracts from the stability of software using it
  • A long term goal is to implement a logging interface that allows us to add context, change output format, etc.

Historical context is available here:


How to use klog

  • Replace imports for github.com/golang/glog with k8s.io/klog
  • Use klog.InitFlags(nil) explicitly for initializing global flags as we no longer use init() method to register the flags
  • You can now use log-file instead of log-dir for logging to a single file (See examples/log_file/usage_log_file.go)
  • If you want to redirect everything logged using klog somewhere else (say syslog!), you can use klog.SetOutput() method and supply a io.Writer. (See examples/set_output/usage_set_output.go)
  • For more logging conventions (See Logging Conventions)

Coexisting with glog

This package can be used side by side with glog. This example shows how to initialize and syncronize flags from the global flag.CommandLine FlagSet. In addition, the example makes use of stderr as combined output by setting alsologtostderr (or logtostderr) to true.

Community, discussion, contribution, and support

Learn how to engage with the Kubernetes community on the community page.

You can reach the maintainers of this project at:

Code of conduct

Participation in the Kubernetes community is governed by the Kubernetes Code of Conduct.


glog

Leveled execution logs for Go.

This is an efficient pure Go implementation of leveled logs in the manner of the open source C++ package https://github.com/google/glog

By binding methods to booleans it is possible to use the log package without paying the expense of evaluating the arguments to the log. Through the -vmodule flag, the package also provides fine-grained control over logging at the file level.

The comment from glog.go introduces the ideas:

Package glog implements logging analogous to the Google-internal
C++ INFO/ERROR/V setup.  It provides functions Info, Warning,
Error, Fatal, plus formatting variants such as Infof. It
also provides V-style logging controlled by the -v and
-vmodule=file=2 flags.

Basic examples:

	glog.Info("Prepare to repel boarders")

	glog.Fatalf("Initialization failed: %s", err)

See the documentation for the V function for an explanation
of these examples:

	if glog.V(2) {
		glog.Info("Starting transaction...")
	}

	glog.V(2).Infoln("Processed", nItems, "elements")

The repository contains an open source version of the log package used inside Google. The master copy of the source lives inside Google, not here. The code in this repo is for export only and is not itself under development. Feature requests will be ignored.

Send bug reports to [email protected].

klog's People

Contributors

adrianlzt avatar bentheelder avatar christopherhein avatar dims avatar dsymonds avatar fatsheep9146 avatar hoegaarden avatar jaredallard avatar joelsmith avatar justinsb avatar k8s-ci-robot avatar mallozup avatar michael-berlin avatar monotek avatar mtaufen avatar munnerz avatar nikhita avatar rlenferink avatar robpike avatar scaat avatar shsjshentao avatar stapelberg avatar thockin avatar vincepri avatar ymmt2005 avatar yuwenma avatar

Watchers

 avatar  avatar

Recommend Projects

  • React photo React

    A declarative, efficient, and flexible JavaScript library for building user interfaces.

  • Vue.js photo Vue.js

    ๐Ÿ–– Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.

  • Typescript photo Typescript

    TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

  • TensorFlow photo TensorFlow

    An Open Source Machine Learning Framework for Everyone

  • Django photo Django

    The Web framework for perfectionists with deadlines.

  • D3 photo D3

    Bring data to life with SVG, Canvas and HTML. ๐Ÿ“Š๐Ÿ“ˆ๐ŸŽ‰

Recommend Topics

  • javascript

    JavaScript (JS) is a lightweight interpreted programming language with first-class functions.

  • web

    Some thing interesting about web. New door for the world.

  • server

    A server is a program made to process requests and deliver data to clients.

  • Machine learning

    Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.

  • Game

    Some thing interesting about game, make everyone happy.

Recommend Org

  • Facebook photo Facebook

    We are working to build community through open source technology. NB: members must have two-factor auth.

  • Microsoft photo Microsoft

    Open source projects and samples from Microsoft.

  • Google photo Google

    Google โค๏ธ Open Source for everyone.

  • D3 photo D3

    Data-Driven Documents codes.