3f1d67b99f
We are in the process of upgrading the AFS servers to focal. As explained by auristor (extracted from IRC below) we need 3 servers to actually perform HA with the ubik protocol: the ubik quorum is defined by the list of voting primary ip addresses as specified in the ubik service's CellServDB file. The server with the lowest ip address gets 1.5 votes and the others 1 vote. To win election requires greater than 50% of the votes. In a two server configuration there are a total of 2.5 votes to cast. 1.5 > 2.5/2 so afsdb02.openstack.org always wins regardless of what afsdb01.openstack.org says. And afsb01.openstack.org can never win because 1 < 2.5/2. by adding a third ubik server to the quorum, the total votes cast are 3.5 and it always requires the vote of two servers to elect a winner ... if afsdb03 is added with the highest ip address, then either afsdb01 or afsdb02 can be elected Add a third server which is a focal host and related configuration. Change-Id: I59e562dd56d6cbabd2560e4205b3bd36045d48c2 |
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