How to use “fit” to frame the nodes and labels

Question

I'm using the fit TikZ library to fit a rectangle around two nodes which include labels. However, the rectangle is only fit around the actual nodes, not about their labels:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{fit}

\begin{document}
\begin{tikzpicture}


\node [label=label1,draw] (node1) {Node1};
\node [label=label2,draw] (node2) at (4,2){Node2};

\node[fit=(node1)(node2), draw] {};
\end{tikzpicture}
\end{document}

How to fit the rectangle also around the node labels?

Answer 1

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{fit}

\begin{document}
\begin{tikzpicture}       
\node [label=label1,draw] (node1) {Node1};
\node [label={[name=l] label2},draw] (node2) at (4,2){Node2};    
\node[fit=(node1)(l), draw] {};
\end{tikzpicture}
\end{document}