\documentclass{beamer}
\usetheme{metropolis}
\setbeamertemplate{mini frame}{}
\setbeamertemplate{mini frame in current section}{}
\setbeamertemplate{mini frame in current subsection}{}
\makeatletter
\setbeamertemplate{footline}{%
\begin{beamercolorbox}[colsep=1.5pt]{upper separation line head}
\end{beamercolorbox}
\begin{beamercolorbox}{section in head/foot}
\vskip2pt\insertnavigation{\paperwidth}\vskip-2pt
\end{beamercolorbox}%
\begin{beamercolorbox}[colsep=1.5pt]{lower separation line head}
\end{beamercolorbox}
}
\makeatother
\setbeamercolor{section in head/foot}{fg=normal text.bg, bg=structure.fg}
\begin{document}
\section{section 1}
\subsection{section name}
\begin{frame}
\frametitle{blub}
abc
\end{frame}
\begin{frame}
\frametitle{blub}
abc
\end{frame}
\section{section 2}
\begin{frame}
\frametitle{blub}
abc
\end{frame}
\section{section 3}
\begin{frame}
\frametitle{blub}
abc
\end{frame}
\end{document}

Second solution including framenumbers
\documentclass{beamer}
\usetheme{metropolis}
\setbeamertemplate{mini frame}{}
\setbeamertemplate{mini frame in current section}{}
\setbeamertemplate{mini frame in current subsection}{}
\makeatletter
\setbeamertemplate{footline}{%
\begin{beamercolorbox}[wd=\textwidth, sep=3ex]{footline}%
\usebeamerfont{page number in head/foot}%
\usebeamertemplate*{frame footer}
\hfill%
\usebeamertemplate*{frame numbering}
\end{beamercolorbox}%
\begin{beamercolorbox}[colsep=1.5pt]{upper separation line head}
\end{beamercolorbox}
\begin{beamercolorbox}{section in head/foot}
\vskip2pt\insertnavigation{\paperwidth}\vskip-2pt
\end{beamercolorbox}%
\begin{beamercolorbox}[colsep=1.5pt]{lower separation line head}
\end{beamercolorbox}
}
\makeatother
\setbeamercolor{section in head/foot}{fg=normal text.bg, bg=structure.fg}
\begin{document}
\section{section 1}
\subsection{section name}
\begin{frame}
\frametitle{blub}
abc
\end{frame}
\begin{frame}
\frametitle{blub}
abc
\end{frame}
\section{section 2}
\begin{frame}
\frametitle{blub}
abc
\end{frame}
\section{section 3}
\begin{frame}
\frametitle{blub}
abc
\end{frame}
\end{document}