Add doc files for esr-gui.

Change-Id: If61b34161025e64a098bf48e71b6b153b6439b57
Issue-ID: AAI-427
Signed-off-by: lizi <li.zi30@zte.com.cn>

1 files changed, 30 insertions, 0 deletions

diff --git a/docs/platform/architecture.rst b/docs/platform/architecture.rst
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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+
+
+Architecture
+------------
+
+ESR contains two components: esr server module and esr gui module
+
+- ESR
+    - ESR server
+    - ESR gui
+
+ONAP-level Architecture
+^^^^^^^^^^^^^^^^^^^^^^^
+
+In ONAP architecture, ESR is a sub-project of A&AI. It provide a single point for users to manage the external system information. It provides a way to register/unregister external system dynamically.
+
+.. image:: images/esr-architecture.PNG
+
+How ESR works
+^^^^^^^^^^^^^^^^^^^^^^^
+
+The user register external system through esr-gui, esr-server will store the external system information to A&AI. And the other components such as VF-C/SDNC/Multi-Cloud then can query the external system information form A&AI. The process of VIM register may be a bit different from the VNFM/EMS/thirdparty SDNC. That because the registered VIM information is some basic information such as region/version/auth-url that things, Multi-Cloud will update the cloud information with more details, such as the volume and tenant details. The VNFM/EMS/thirdparty SDNC will not be updated by VF-C and SDNC.
+
+.. image:: images/vim-register-progress.PNG
+.. image:: images/external-system-register-progress.PNG
+
+The complete workflow is shown below in the form of a sequence diagram.
+
+.. image:: images/external-system-register-sequence-diagram.PNG
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