func()

in logger/fluentd/logger.go [63:109]

• 36 lines of code
• 5 McCabe index (conditional complexity)

func (la *LoggerArgs) RunLogDriver(ctx context.Context, config *logging.Config, ready func() error) error {
	defer debug.DeferFuncForRunLogDriver()

	loggerConfig := getFluentdConfig(la.args)
	info := logger.NewInfo(
		la.globalArgs.ContainerID,
		la.globalArgs.ContainerName,
		logger.WithConfig(loggerConfig),
	)
	stream, err := dockerfluentd.New(*info)
	if err != nil {
		debug.LoggerErr = errors.Wrap(err, "unable to create stream")
		return debug.LoggerErr
	}

	l, err := logger.NewLogger(
		logger.WithStdout(config.Stdout),
		logger.WithStderr(config.Stderr),
		logger.WithInfo(info),
		logger.WithStream(stream),
	)
	if err != nil {
		debug.LoggerErr = errors.Wrap(err, "unable to create fluentd driver")
		return debug.LoggerErr
	}

	if la.globalArgs.Mode == logger.NonBlockingMode {
		debug.SendEventsToLog(logger.DaemonName, "Starting non-blocking mode driver", debug.INFO, 0)
		l = logger.NewBufferedLogger(l, la.globalArgs.MaxBufferSize, la.globalArgs.ContainerID)
	}

	// Start fluentd driver
	debug.SendEventsToLog(logger.DaemonName, "Starting fluentd driver", debug.INFO, 0)
	err = l.Start(ctx, la.globalArgs.UID, la.globalArgs.GID, la.globalArgs.CleanupTime, ready)
	if err != nil {
		debug.LoggerErr = errors.Wrap(err, "failed to run fluentd driver")
		// Do not return error if log driver has issue sending logs to destination, because if error
		// returned here, containerd will identify this error and kill shim process, which will kill
		// the container process accordingly.
		// Note: the container will continue to run if shim logger exits after.
		// Reference: https://github.com/containerd/containerd/blob/release/1.3/runtime/v2/logging/logging.go
		return nil
	}
	debug.SendEventsToLog(logger.DaemonName, "Logging finished", debug.INFO, 1)

	return nil
}