\documentclass[tikz,convert={outfile=\jobname.svg}]{standalone}
    %\documentclass{article}

\usepackage{tikz}
\usetikzlibrary{positioning,fit,calc}

\begin{document}
    \begin{tikzpicture}[
			block/.style={
				draw,
				fill=white,
				rectangle, 
				minimum width={width("TLE2JSON")+2pt},
				minimum height={height("TLE")+2pt},
				font=\small,
				node distance=2cm
			}
		]

		% left blocks
        \node[block] (TLE) {TLE};
        \node[block, below = of TLE] (TLE2JSON) {TLE2JSON};
        \node[block, left = of TLE2JSON] (celestrack) {celestrack};
        \node[block, below = of TLE2JSON] (cache) {cache};

		% right blocks
        \node[block, right = of TLE] (drone) {drone};
        \node[block, below = of drone, right = of TLE2JSON] (prometheus) {prometheus};
        \node[block, below = of prometheus, right = of cache] (grafana) {grafana};

		% left clusters
		\node[draw, fit=(TLE), label=left:{git.darknebu.la}] (git.darknebu.la) {}; 
		\node[draw, fit=(TLE2JSON) (cache), label=below:{YOU}, draw=red] (you) {}; 
		\node[draw, fit=(celestrack), label=left:{the internet}] (the internet) {}; 

		% right clusters
		\node[draw, fit=(drone) (prometheus) (grafana), label=right:{nbg1}] (nbg1) {}; 

		\path[draw, ->, line width=0.175mm, >=stealth] (grafana.north) -- (prometheus.south) node[midway, fill=white] {data};
		\path[draw, ->, line width=0.175mm, >=stealth] (prometheus.north) -- (drone.south) node[midway, fill=white] {metrics};
		\path[draw, ->, line width=0.175mm, >=stealth] (drone.west) -- (TLE.east) node[midway, fill=white] {ci};
		\path[draw, ->, line width=0.175mm, >=stealth] (prometheus.west) -- (TLE2JSON.east) node[midway, fill=white] {metrics};
		\path[draw, ->, line width=0.175mm, >=stealth] (TLE2JSON.west) -- (celestrack.east) node[midway, fill=white]{TLE};
		\path[draw, ->, line width=0.175mm, >=stealth] (TLE2JSON.north) -- (TLE.south) node[midway, fill=white] {go module};
		\path[draw, ->, line width=0.175mm, >=stealth] (TLE2JSON.south) -- (cache.north) node[midway, fill=white] {TLE};


    \end{tikzpicture}
\end{document}