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authorcsatari <gergely.csatari@nokia.com>2016-07-01 11:19:54 +0200
committercsatari <gergely.csatari@nokia.com>2016-07-05 11:22:57 +0200
commit791354a57e2e6c6e049877a95cbaecd9d27d6966 (patch)
treee835a62d984bcef2c59ad822220f7799314cd741 /docs/requirements/use_cases/georedundancy_cells.rst
parentd3d984a25934207b9c181e6ce775dae0305252e4 (diff)
Polishing of georedundancy and provider network uc-s
Adding the final touch to my use cases: - Clarification of the introduction text in the general georedundancy capter - Clarification of the description of both the georedundancy and the provider networks use cases - Adding references. Change-Id: I9734154dc7fbb5f3a86af17c451b02cca839a741 Signed-off-by: csatari <gergely.csatari@nokia.com>
Diffstat (limited to 'docs/requirements/use_cases/georedundancy_cells.rst')
-rw-r--r--docs/requirements/use_cases/georedundancy_cells.rst59
1 files changed, 35 insertions, 24 deletions
diff --git a/docs/requirements/use_cases/georedundancy_cells.rst b/docs/requirements/use_cases/georedundancy_cells.rst
index 34269dc..1a98c77 100644
--- a/docs/requirements/use_cases/georedundancy_cells.rst
+++ b/docs/requirements/use_cases/georedundancy_cells.rst
@@ -4,40 +4,51 @@
Connection between different OpenStack cells
--------------------------------------------
Description
-^^^^^^^^^^^
+~~~~~~~~~~~
There should be an API to manage the infrastructure-s networks between two
-OpenStack cells.
-(Note: In the Mitaka release of OpenStack cells v1 are considered as, cells v2
-functionaity is under implementation)
-This capability exists in the different SDN controllers, like the Add New BGP
-neighbour API of OpenDaylight. OpenStack Neutron should provide and abstracted
-API for this functionality what later calls the given SDN controllers related
-API.
+OpenStack cells. (Note: In the Mitaka release of OpenStack cells v1 are
+considered as experimental, while cells v2 functionality is under
+implementation). Cells are considered to be problematic from maintainability
+perspective as the sub-cells are using only the internal message bus and there
+is no API (and CLI) to do maintenance actions in case of a network connectivity
+problem between the main cell and the sub cells.
+
+The functionality behind the API depends on the underlying network providers (SDN
+controllers) and the networking setup.
+(For example OpenDaylight has an API to add new BGP neighbour.)
+
+OpenStack Neutron should provide an abstracted API for this functionality what
+calls the underlying SDN controllers API.
Derrived Requirements
-^^^^^^^^^^^^^^^^^^^^^
+~~~~~~~~~~~~~~~~~~~~~
- Possibility to define a remote and a local endpoint
- As in case of cells the nova-api service is shared it should be possible
to identify the cell in the API calls
-Northbound API
-""""""""""""""
+Northbound API / Workflow
++++++++++++++++++++++++++
- An infrastructure network management API is needed
+ - API call to define the remote and local infrastructure endpoints
- When the endpoints are created neutron is configured to use the new network.
- (Note: Nova networking is not considered as it is deprecated.)
-
-Data model objects
-""""""""""""""""""
- - TBD
-
-Orchestration
-"""""""""""""
- - TBD
Dependencies on compute services
-""""""""""""""""""""""""""""""""
+++++++++++++++++++++++++++++++++
None.
-Potential implementation
-""""""""""""""""""""""""
- - TBD
+Data model objects
+++++++++++++++++++
+ - local and remote endpoint objects (Most probably IP addresses with some
+ additional properties).
+
+Current implementation
+~~~~~~~~~~~~~~~~~~~~~~
+ Current OpenStack implementation provides no way to set up the underlay
+ network connection.
+ OpenStack Tricicle project [TRICICLE]_
+ has plans to build up inter datacenter L2 and L3 networks.
+
+Gaps in the current solution
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ An infrastructure management API is missing from Neutron where the local and
+ remote endpoints of the underlay network could be configured.