docs: Note currently used L3 gateway HA approach.

The OVN gateway HA design document is very useful in its current form. It describes a range of options OVN could take to provide gateway HA. Leave all the useful discussion in place and add a note to indicate how the current implementation lines up with the options described. I plan to follow up with an additional patch to describe the current L3 gateway HA implementation in the ovn-architecture document. Signed-off-by: Russell Bryant <[email protected]> Acked-by: Miguel Angel Ajo <[email protected]>
qihuaheng · Jul 21, 2017 · f66cca6 · f66cca6
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diff --git a/Documentation/topics/high-availability.rst b/Documentation/topics/high-availability.rst
@@ -66,6 +66,12 @@ a plan for OVN Gateway High Availability which takes into account our past
 experience building similar systems.  It should be considered a fluid changing
 proposal, not a set-in-stone decree.
 
+.. note::
+    This document describes a range of options OVN could take to provide
+    high availability for gateways.  The current implementation provides L3
+    gateway high availability by the "Router Specific Active/Backup"
+    approach described in this document.
+
 Basic Architecture
 ------------------