[Tarantool-patches] [PATCH vshard 4/6] config: introduce master 'auto' replicaset option

[Vladislav Shpilevoy]

Hi! Thanks for the extensive review!

>> +local function check_replicaset_master(master, ctx)
>> +    if not lutil.version_is_at_least(1, 10, 0) then
>> +        error('Only versions >= 1.10 support master discovery')
>> +    end
> 
> If we talk about "is_async" netbox option. We should check 1.10.1:
> 
> https://github.com/tarantool/tarantool/commit/0f686829a89b87d4f8d10fd25d4acfdea9b3dc60#diff-1e545a3af3d3592423eff523367e962e18f7eda45c2f9bef6994a254f6044d70
> 
> There is a gap between 1.10.0 and 1.10.1 when there is no is_async.
Good call. It is easy to fix so I did it:

====================
@@ -22,8 +22,9 @@ local function check_replica_master(master, ctx)
 end
 
 local function check_replicaset_master(master, ctx)
-    if not lutil.version_is_at_least(1, 10, 0) then
-        error('Only versions >= 1.10 support master discovery')
+    -- Limit the version due to extensive usage of netbox is_async feature.
+    if not lutil.version_is_at_least(1, 10, 1) then
+        error('Only versions >= 1.10.1 support master discovery')
     end
     if master ~= 'auto' then
         error('Only "auto" master is supported')