// StartLogging initializes and starts the container logging stream.
func (daemon *Daemon) StartLogging(container *container.Container) error {
cfg := container.GetLogConfig(daemon.defaultLogConfig)
if cfg.Type == "none" {
return nil // do not start logging routines
}
if err := logger.ValidateLogOpts(cfg.Type, cfg.Config); err != nil {
return err
}
l, err := container.StartLogger(cfg)
if err != nil {
return fmt.Errorf("Failed to initialize logging driver: %v", err)
}
copier := logger.NewCopier(container.ID, map[string]io.Reader{"stdout": container.StdoutPipe(), "stderr": container.StderrPipe()}, l)
container.LogCopier = copier
copier.Run()
container.LogDriver = l
// set LogPath field only for json-file logdriver
if jl, ok := l.(*jsonfilelog.JSONFileLogger); ok {
container.LogPath = jl.LogPath()
}
return nil
}
func (daemon *Daemon) getLogger(container *container.Container) (logger.Logger, error) {
if container.LogDriver != nil && container.IsRunning() {
return container.LogDriver, nil
}
cfg := container.GetLogConfig(daemon.defaultLogConfig)
if err := logger.ValidateLogOpts(cfg.Type, cfg.Config); err != nil {
return nil, err
}
return container.StartLogger(cfg)
}
func (daemon *Daemon) getLogger(container *container.Container) (logger.Logger, error) {
if container.LogDriver != nil && container.IsRunning() {
return container.LogDriver, nil
}
return container.StartLogger(container.HostConfig.LogConfig)
}