Each time the installer script is executed it will generate the following log file:

/var/log/pki/pki-<subsystem>-<script>.<timestamp>.log

There is no mechanism to purge the log files automatically, so the log files will accumulate and waste disk space. This could be a problem, especially on test machines.

A possible solution is to use rotating log files, so the number of files and their size will be limited:

/var/log/pki/<script>.log
/var/log/pki/<script>.log.1
...
/var/log/pki/<script>.log.10

Each log message has a timestamp, so it should be possible to distinguish one script execution from another.

Additionally, the logging configuration should be stored in a file such as /etc/pki/logging.conf so it can be customized.