mirror of
https://github.com/k3s-io/k3s.git
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81 lines
2.3 KiB
Go
81 lines
2.3 KiB
Go
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/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package logs
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import (
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"flag"
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"fmt"
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"log"
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"time"
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"github.com/spf13/pflag"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/klog"
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)
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const logFlushFreqFlagName = "log-flush-frequency"
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var logFlushFreq = pflag.Duration(logFlushFreqFlagName, 5*time.Second, "Maximum number of seconds between log flushes")
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// TODO(thockin): This is temporary until we agree on log dirs and put those into each cmd.
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func init() {
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klog.InitFlags(flag.CommandLine)
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flag.Set("logtostderr", "true")
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}
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// AddFlags registers this package's flags on arbitrary FlagSets, such that they point to the
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// same value as the global flags.
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func AddFlags(fs *pflag.FlagSet) {
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fs.AddFlag(pflag.Lookup(logFlushFreqFlagName))
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}
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// KlogWriter serves as a bridge between the standard log package and the glog package.
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type KlogWriter struct{}
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// Write implements the io.Writer interface.
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func (writer KlogWriter) Write(data []byte) (n int, err error) {
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klog.InfoDepth(1, string(data))
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return len(data), nil
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}
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// InitLogs initializes logs the way we want for kubernetes.
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func InitLogs() {
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log.SetOutput(KlogWriter{})
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log.SetFlags(0)
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// The default glog flush interval is 5 seconds.
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go wait.Forever(klog.Flush, *logFlushFreq)
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}
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// FlushLogs flushes logs immediately.
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func FlushLogs() {
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klog.Flush()
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}
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// NewLogger creates a new log.Logger which sends logs to klog.Info.
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func NewLogger(prefix string) *log.Logger {
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return log.New(KlogWriter{}, prefix, 0)
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}
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// GlogSetter is a setter to set glog level.
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func GlogSetter(val string) (string, error) {
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var level klog.Level
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if err := level.Set(val); err != nil {
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return "", fmt.Errorf("failed set klog.logging.verbosity %s: %v", val, err)
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}
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return fmt.Sprintf("successfully set klog.logging.verbosity to %s", val), nil
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}
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