when we switched from rsync sst method to mariabackup and forced an sst the sst failed with the following error message, which is not easy to see/find:
[root@notebook31 .sst]# tail innobackup.move.log
180322 17:37:22 innobackupex: Starting the move-back operation
IMPORTANT: Please check that the move-back run completes successfully.
At the end of a successful move-back run innobackupex
prints "completed OK!".
--innobackupex based on MariaDB server 10.2.13-MariaDB Linux (x86_64)
Error: datadir must be specified.
Maybe it is possible to write down datadir automatically in my.cnf when mariadb is rolled out via RPM?