Perform the removal
When you remove any Kudu masters from a multi-master deployment, you need to rewrite
the Raft configuration on the remaining masters, remove data and WAL directories from the
unwanted masters, and finaly modify the value of the tserver_master_addrs
configuration parameter for the tablet servers to remove the unwanted masters. You need to bring
the Kudu clusters down. Therefore, identify at least a one-hour maintenance window for this
task.
-
Using a browser, visit each master’s web UI and navigate to the
/masters
page. All the masters should now be listed there with one master in theLEADER
role and the others in theFOLLOWER
role. The contents of/masters
on each master should be the same. -
Run a Kudu system check (
ksck
) on the cluster using thekudu
command line tool.