fail2ban/debian/fail2ban.logrotate

/var/log/fail2ban.log {

    weekly
    rotate 4
    compress
    # Do not rotate if empty
    notifempty

    delaycompress
    missingok
    postrotate
	fail2ban-client flushlogs 1>/dev/null
    endscript

    # If fail2ban runs as non-root it still needs to have write access
    # to logfiles.
    # create 640 fail2ban adm
    create 640 root adm
}