/
journald.go
59 lines (49 loc) · 1.34 KB
/
journald.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
// +build linux
// Package journald provides the log driver for forwarding server logs
// to endpoints that receive the systemd format.
package journald
import (
"fmt"
"github.com/Sirupsen/logrus"
"github.com/coreos/go-systemd/journal"
"github.com/docker/docker/daemon/logger"
)
const name = "journald"
type journald struct {
Jmap map[string]string
}
func init() {
if err := logger.RegisterLogDriver(name, New); err != nil {
logrus.Fatal(err)
}
}
// New creates a journald logger using the configuration passed in on
// the context.
func New(ctx logger.Context) (logger.Logger, error) {
if !journal.Enabled() {
return nil, fmt.Errorf("journald is not enabled on this host")
}
// Strip a leading slash so that people can search for
// CONTAINER_NAME=foo rather than CONTAINER_NAME=/foo.
name := ctx.ContainerName
if name[0] == '/' {
name = name[1:]
}
jmap := map[string]string{
"CONTAINER_ID": ctx.ContainerID[:12],
"CONTAINER_ID_FULL": ctx.ContainerID,
"CONTAINER_NAME": name}
return &journald{Jmap: jmap}, nil
}
func (s *journald) Log(msg *logger.Message) error {
if msg.Source == "stderr" {
return journal.Send(string(msg.Line), journal.PriErr, s.Jmap)
}
return journal.Send(string(msg.Line), journal.PriInfo, s.Jmap)
}
func (s *journald) Close() error {
return nil
}
func (s *journald) Name() string {
return name
}