vendor dependencies

vendor/k8s.io/component-base/logs/logs.go

@@ -0,0 +1,80 @@
+/*
+Copyright 2014 The Kubernetes 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 logs
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"time"
+
+	"github.com/spf13/pflag"
+	"k8s.io/apimachinery/pkg/util/wait"
+	"k8s.io/klog"
+)
+
+const logFlushFreqFlagName = "log-flush-frequency"
+
+var logFlushFreq = pflag.Duration(logFlushFreqFlagName, 5*time.Second, "Maximum number of seconds between log flushes")
+
+// TODO(thockin): This is temporary until we agree on log dirs and put those into each cmd.
+func init() {
+	klog.InitFlags(flag.CommandLine)
+	flag.Set("logtostderr", "true")
+}
+
+// AddFlags registers this package's flags on arbitrary FlagSets, such that they point to the
+// same value as the global flags.
+func AddFlags(fs *pflag.FlagSet) {
+	fs.AddFlag(pflag.Lookup(logFlushFreqFlagName))
+}
+
+// KlogWriter serves as a bridge between the standard log package and the glog package.
+type KlogWriter struct{}
+
+// Write implements the io.Writer interface.
+func (writer KlogWriter) Write(data []byte) (n int, err error) {
+	klog.InfoDepth(1, string(data))
+	return len(data), nil
+}
+
+// InitLogs initializes logs the way we want for kubernetes.
+func InitLogs() {
+	log.SetOutput(KlogWriter{})
+	log.SetFlags(0)
+	// The default glog flush interval is 5 seconds.
+	go wait.Forever(klog.Flush, *logFlushFreq)
+}
+
+// FlushLogs flushes logs immediately.
+func FlushLogs() {
+	klog.Flush()
+}
+
+// NewLogger creates a new log.Logger which sends logs to klog.Info.
+func NewLogger(prefix string) *log.Logger {
+	return log.New(KlogWriter{}, prefix, 0)
+}
+
+// GlogSetter is a setter to set glog level.
+func GlogSetter(val string) (string, error) {
+	var level klog.Level
+	if err := level.Set(val); err != nil {
+		return "", fmt.Errorf("failed set klog.logging.verbosity %s: %v", val, err)
+	}
+	return fmt.Sprintf("successfully set klog.logging.verbosity to %s", val), nil
+}