Many Galera scripts assumes that my_print_defaults and other MariaDB
binaries are in PATH. This might not be true.
- We can't assume that "mysql" is in the path. We have to search for this like
we do with my_print_defaults !
- Checking for version number doesn't guarantee that the binaries are
compiled with galera.
Instead you should check if a binary supports any of the required wresp
You can do this with:
mysql --test-some-option --version
This will fail with an error if the option is not supported.