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diff --git a/docs/design/201-Reference_Architecture.rst b/docs/design/201-Reference_Architecture.rst new file mode 100644 index 0000000..75aa461 --- /dev/null +++ b/docs/design/201-Reference_Architecture.rst @@ -0,0 +1,54 @@ +====================== +Reference Architecture +====================== + +This section describes the reference architecture, the function blocks, +and the function entities of Escalator for the reader to well understand how +the basic functions to be organized. + +The software stack on each node is generally as shown in the table below. + +.. figure:: images/figure2.png + :name: figure2 + :width: 100% + +Since the upgrading of control node will not affect the VNFs service in the blue +box, this chapter will focusing on the upgrading of compute nodes. + + +Precondition of Upgrade +======================= + +Upgrade related modules in VIM +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Upgrade operations are initiated by the user through the VIM. For VIM, upgrade +management mainly contains the object: + +- **Upgrade Manager** + +Mainly responsible for control of the upgrade process.The Escalator is required +to know the software deployment information of the platform and will use these +information during the upgrading. It will be collected from some place, such +as the Installer, Deploy Manager and Escalator itself, etc. + +- **VIM Interface**: + +Mainly responsible for the external interface, include Vi-Vnfm, Or-Vi. This +module stores VNFO and VNFM external information such as address and +authentication. + +- **Cloud Manager**: + +Mainly responsible for virtualization resources management,which might be +considered made up of Openstack and SDN control node. + +- **System Support**: + +This layer is the runtime support environment of upper layers, e.g. Cloud +Manager and VIM interface., including:OS, HA, etc. To upgrade the upper +software is based on this module. + +.. figure:: images/figure3.png + :name: figure3 + :width: 100% |