/
log.go
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/
log.go
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// Copyright 2022 Antrea Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package log processes the klog flags, and enforces the maximum log file
// size and maximum log file number limits.
package log
import (
"flag"
"time"
"github.com/spf13/pflag"
"k8s.io/klog/v2"
)
const (
logFlushFreqFlag = "log-flush-frequency"
)
var (
klogFlags = flag.NewFlagSet("logging", flag.ContinueOnError)
logFlushFreq time.Duration
)
func init() {
klog.InitFlags(klogFlags)
}
func addKlogFlags(fs *pflag.FlagSet) {
klogFlags.VisitAll(func(f *flag.Flag) {
pf := pflag.PFlagFromGoFlag(f)
fs.AddFlag(pf)
})
}
func AddFlags(fs *pflag.FlagSet) {
addKlogFlags(fs)
fs.Uint16Var(&maxNumArg, maxNumFlag, maxNumArg, "Maximum number of log files per severity level to be kept. Value 0 means unlimited.")
fs.DurationVar(&logFlushFreq, logFlushFreqFlag, 5*time.Second, "Maximum number of seconds between log flushes")
}
type Options struct {
withFlushDaemon bool
}
func WithoutFlushDaemon(options *Options) {
options.withFlushDaemon = false
}
func initKlog(options *Options) {
if options.withFlushDaemon {
klog.StartFlushDaemon(logFlushFreq)
}
klog.EnableContextualLogging(false)
}
func InitLogs(fs *pflag.FlagSet, opts ...func(options *Options)) {
options := Options{
withFlushDaemon: true,
}
for _, opt := range opts {
opt(&options)
}
initKlog(&options)
initLogFileLimits(fs)
initLogLevelManager(fs)
}
func FlushLogs() {
klog.Flush()
}