mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
package jsonfilelog
|
|
|
|
import (
|
|
"bytes"
|
|
"os"
|
|
"sync"
|
|
|
|
"github.com/docker/docker/daemon/logger"
|
|
"github.com/docker/docker/pkg/jsonlog"
|
|
)
|
|
|
|
// JSONFileLogger is Logger implementation for default docker logging:
|
|
// JSON objects to file
|
|
type JSONFileLogger struct {
|
|
buf *bytes.Buffer
|
|
f *os.File // store for closing
|
|
mu sync.Mutex // protects buffer
|
|
}
|
|
|
|
// New creates new JSONFileLogger which writes to filename
|
|
func New(filename string) (logger.Logger, error) {
|
|
log, err := os.OpenFile(filename, os.O_RDWR|os.O_APPEND|os.O_CREATE, 0600)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &JSONFileLogger{
|
|
f: log,
|
|
buf: bytes.NewBuffer(nil),
|
|
}, nil
|
|
}
|
|
|
|
// Log converts logger.Message to jsonlog.JSONLog and serializes it to file
|
|
func (l *JSONFileLogger) Log(msg *logger.Message) error {
|
|
l.mu.Lock()
|
|
defer l.mu.Unlock()
|
|
err := (&jsonlog.JSONLog{Log: string(msg.Line) + "\n", Stream: msg.Source, Created: msg.Timestamp}).MarshalJSONBuf(l.buf)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
l.buf.WriteByte('\n')
|
|
_, err = l.buf.WriteTo(l.f)
|
|
if err != nil {
|
|
// this buffer is screwed, replace it with another to avoid races
|
|
l.buf = bytes.NewBuffer(nil)
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Close closes underlying file
|
|
func (l *JSONFileLogger) Close() error {
|
|
return l.f.Close()
|
|
}
|
|
|
|
// Name returns name of this logger
|
|
func (l *JSONFileLogger) Name() string {
|
|
return "JSONFile"
|
|
}
|