docs: convert extras doc md->rst

Type: improvement

Change-Id: Ie3b25a86b99098d2b3a21a11fc73234c8ed589d6
Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/extras/vpptop/README.rst b/extras/vpptop/README.rst
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+.. _vpp_top_doc:
+
+VPP Top Installation
+====================
+
+`VPPTop <(https://github.com/PANTHEONtech/vpptop)>`__ is a real-time
+data viewer for VPP interfaces and metrics displayed in dynamic terminal
+user interface, written in GO.
+
+Following make targets are available:
+
+* ``install`` downloads and installs VPPTop including all external dependencies, binary API generator
+  and latest version of GO. Running ``make install-dep`` (from the VPP top-level Makefile) is recommended.
+* ``cleanup`` removes VPPTop repository from the target directory (``/build-root/vpptop``)
+* ``start`` runs the VPPTop if installed
+* ``help`` shows information about available commands
+
+The VPPTop is installed to be compatible with the given VPP version and
+may not work with other versions with different API. In that case, the
+VPPTop has to be re-installed.
+
+GO variables management
+-----------------------
+
+The installer depends on Golang environment variables GOROOT (for the GO
+installation) and GOPATH (for other binaries). Those variables are read
+from the environment and set to following values if not found:
+
+::
+
+    GOROOT=/root/.go/ GOPATH=/root/go/
+
+
+If you have the GO already installed and have to run the installer with
+``sudo``, use the ``-E`` switch to provide those variables to the
+installer.