zoneminder/scripts/zmlogrotate.conf.in

# First the log files

/var/log/zm/*log {
    weekly
    rotate 3
    notifempty
    missingok
}

Now the weekly db backup

/var/lib/zm/zm_backup.sql {
weekly
rotate 3
missingok
compress
postrotate
@BINDIR@/zmdbbackup
endscript
}