portainer/pkg/libstack/compose/logwriter.go

59 lines
1.5 KiB
Go

package compose
import (
"strings"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
)
// LogrusToZerologWriter is a custom logrus writer that writes logrus logs to zerolog.
// logrus is the logging library used by Docker Compose.
type LogrusToZerologWriter struct{}
func (ltzw *LogrusToZerologWriter) Write(p []byte) (n int, err error) {
logMessage := string(p)
logMessage = strings.TrimSuffix(logMessage, "\n")
// Parse the log level and message from the logrus log.
// This assumes logrus's default text format.
var level, message string
if strings.HasPrefix(logMessage, "time=") {
// Example logrus log: `time="2023-10-01T12:34:56Z" level=info msg="This is a log message" key=value`
parts := strings.SplitN(logMessage, " ", 4)
if len(parts) >= 3 {
level = strings.TrimPrefix(parts[1], "level=")
message = strings.TrimPrefix(parts[2], "msg=")
message = strings.Trim(message, `"`)
}
} else {
// Fallback for simpler log formats.
level = "info"
message = logMessage
}
// Map logrus levels to zerolog levels.
var zlogLevel zerolog.Level
switch level {
case "debug":
zlogLevel = zerolog.DebugLevel
case "info":
zlogLevel = zerolog.InfoLevel
case "warn", "warning":
zlogLevel = zerolog.WarnLevel
case "error":
zlogLevel = zerolog.ErrorLevel
case "fatal":
zlogLevel = zerolog.FatalLevel
case "panic":
zlogLevel = zerolog.PanicLevel
default:
zlogLevel = zerolog.InfoLevel
}
// Log the message using zerolog.
log.WithLevel(zlogLevel).Msg(message)
return len(p), nil
}