Project: Inclavare Containers (Runtime / Container Runtime)
File: README.md

klog ==== klog is a permanent fork of https://github.com/golang/glog. The decision to create klog was one that wasn't made lightly, but it was necessary due to some drawbacks that are present in . 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` 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: https://github.com/kubernetes/kubernetes/issues/61006 https://github.com/kubernetes/kubernetes/issues/70264 https://groups.google.com/forum/#!msg/kubernetes-sig-architecture/wCWiWf3Juzs/hXRVBH90CgAJ https://groups.google.com/forum/#!msg/kubernetes-dev/7vnijOMhLS0/1oRiNtigBgAJ How to use klog =============== Replace imports for `"github.com/golang/glog"` with `"k8s.io/klog/v2"` Use `klog.InitFlags(nil)` explicitly for initializing global flags as we no longer use `init()` method to register the flags You can now use `logfile` instead of `logdir` for logging to a single file (See `examples/logfile/usagelog_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/setoutput/usageset_output.go`) For more logging conventions (See ) NOTE: please use the newer go versions that support semantic import versioning in modules, ideally go 1.11.4 or greater. See to see how to coexist with both klog/v1 and klog/v2. This package can be used side by side with glog. shows how to initialize and synchronize 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`. Learn how to engage with the Kubernetes community on the . You can reach the maintainers of this project at: Participation in the Kubernetes community is governed by the . 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 golang-nuts@googlegroups.com.