We have this configuration:

NodeA is located in DataCenterA. NodeB is located in (geographically separate) 
DataCenterB.

DataCenterA is connected to DataCenterB through 4 redundant gigabit links (two 
physically separate Corosync rings).

Both nodes reach the Internet through (geographically separate) DataCenterC.

Is it possible to prevent cluster partition (or drbd split brain) if the links 
between DataCenterA and DataCenterB go down, but at least one node can still 
communicate with DataCenterC? Note that we have no equipment at DataCenterC, 
but we can ping stuff in it and through it.

Ideally, I would like to prevent a secondary node from going primary if it 
cannot communicate with DataCenterC.

--
Eric Robinson



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