In the fields we saw several cases when people try to update servers in their Kudu clusters to support denser storage per node. Two major points specific to such cases:
- The contents is wiped out since the disk drives are among hardware components to be replaced
- The upgraded node is getting back to the cluster under the same IP address and using the same DNS name, so it's natural to to have the tablet server to run under the same UUID.
The procedure is to use the functionality provided by kudu fs format CLI utility which can take UUID and the set of data directories as input: