60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
// +build linux
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// Package journald provides the log driver for forwarding server logs
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// to endpoints that receive the systemd format.
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package journald
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import (
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"fmt"
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"github.com/Sirupsen/logrus"
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"github.com/coreos/go-systemd/journal"
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"github.com/docker/docker/daemon/logger"
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)
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const name = "journald"
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type journald struct {
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Jmap map[string]string
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}
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func init() {
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if err := logger.RegisterLogDriver(name, New); err != nil {
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logrus.Fatal(err)
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}
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}
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// New creates a journald logger using the configuration passed in on
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// the context.
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func New(ctx logger.Context) (logger.Logger, error) {
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if !journal.Enabled() {
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return nil, fmt.Errorf("journald is not enabled on this host")
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}
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// Strip a leading slash so that people can search for
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// CONTAINER_NAME=foo rather than CONTAINER_NAME=/foo.
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name := ctx.ContainerName
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if name[0] == '/' {
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name = name[1:]
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}
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jmap := map[string]string{
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"CONTAINER_ID": ctx.ContainerID[:12],
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"CONTAINER_ID_FULL": ctx.ContainerID,
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"CONTAINER_NAME": name}
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return &journald{Jmap: jmap}, nil
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}
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func (s *journald) Log(msg *logger.Message) error {
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if msg.Source == "stderr" {
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return journal.Send(string(msg.Line), journal.PriErr, s.Jmap)
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}
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return journal.Send(string(msg.Line), journal.PriInfo, s.Jmap)
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}
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func (s *journald) Close() error {
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return nil
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}
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func (s *journald) Name() string {
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return name
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}
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