kubernetes/pkg/kubelet/kubelet_server_journal_linux.go

// getLoggingCmd returns the journalctl cmd and arguments for the given nodeLogQuery and boot. Note that
// services are explicitly passed here to account for the heuristics
func getLoggingCmd(n *nodeLogQuery, services []string) (string, []string, error) { … }

// checkForNativeLogger checks journalctl output for a service
func checkForNativeLogger(ctx context.Context, service string) bool { … }