[spp] [PATCH 02/15] docs: add overview of SPP container

[ogawa.yasufumi@lab.ntt.co.jp]

From: Yasufumi Ogawa <ogawa.yasufumi@lab.ntt.co.jp>

Signed-off-by: Yasufumi Ogawa <ogawa.yasufumi@lab.ntt.co.jp>
---
 docs/guides/tools/sppc/overview.rst | 31 +++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 docs/guides/tools/sppc/overview.rst

diff --git a/docs/guides/tools/sppc/overview.rst b/docs/guides/tools/sppc/overview.rst
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+.. _spp_container_overview:
+
+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright(c) 2017-2018 Nippon Telegraph and Telephone Corporation
+
+
+.. _sppc_overview_overview:
+
+Overview
+========
+
+SPP container is a set of tools for running SPP and DPDK applications
+with docker.
+It consists of shell or python scripts
+for building container images and launching app containers
+with docker commands.
+
+As shown in :numref:`figure_sppc_overview`, all of
+DPDK applications, including SPP primary and secondary processes,
+run inside containers.
+SPP controller is just a python script and does not need to be run as
+an app container.
+
+
+.. _figure_sppc_overview:
+
+.. figure:: ../../images/tools/sppc/sppc_overview.*
+   :height: 640 em
+   :width: 640 em
+
+   SPP container overview
-- 
2.17.1