Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/common/kafka/logger.go

@@ -0,0 +1,41 @@
+package kafka
+
+import (
+	"sync"
+
+	"github.com/IBM/sarama"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/logger"
+)
+
+var (
+	log  = logger.New("sarama", "", "")
+	once sync.Once
+)
+
+type debugLogger struct{}
+
+func (*debugLogger) Print(v ...interface{}) {
+	log.Trace(v...)
+}
+
+func (*debugLogger) Printf(format string, v ...interface{}) {
+	log.Tracef(format, v...)
+}
+
+func (l *debugLogger) Println(v ...interface{}) {
+	l.Print(v...)
+}
+
+// SetLogger configures a debug logger for kafka (sarama)
+func SetLogger(level telegraf.LogLevel) {
+	// Set-up the sarama logger only once
+	once.Do(func() {
+		sarama.Logger = &debugLogger{}
+	})
+	// Increase the log-level if needed.
+	if !log.Level().Includes(level) {
+		log.SetLevel(level)
+	}
+}