replacements are now saved in a map

logging/journald.go

@@ -19,6 +19,11 @@ import (
 	"github.com/rs/zerolog"
 )
 
+var replacements = map[string]string{
+	"-": "_",
+	" ": "_",
+}
+
 const defaultJournalDPrio = journal.PriNotice
 
 func binaryFmt(p []byte) bool {
@@ -66,6 +71,14 @@ func levelToJPrio(zLevel string) journal.Priority {
 	return defaultJournalDPrio
 }
 
+func replace(input string) (output string) {
+	output = input
+	for key, value := range replacements {
+		output = strings.ReplaceAll(output, key, value)
+	}
+	return
+}
+
 func (w journalWriter) Write(p []byte) (n int, err error) {
 	var event map[string]interface{}
 	origPLen := len(p)
@@ -87,7 +100,7 @@ func (w journalWriter) Write(p []byte) (n int, err error) {
 
 	msg := ""
 	for key, value := range event {
-		jKey := strings.ToUpper(key)
+		jKey := replace(strings.ToUpper(key))
 		switch key {
 		case zerolog.LevelFieldName, zerolog.TimestampFieldName:
 			continue