fail2ban logrotate scripts stops fail2ban logging

On a clean alpine 3.11.5 system:

after akp add fail2ban logrotate the file /etc/logrotate.d/fail2ban is installed and run by logrotate which is run by crond on a daily basis.

After a logrotate run, fail2ban no longer logs to /var/log/fail2ban.log.

It looks like the post-rotate in /etc/logrotate.d/fail2ban is not correct.

• Currently: /usr/bin/fail2ban-client set logtarget /var/log/fail2ban.log 1>/dev/null || true
• Proposed: /usr/bin/fail2ban-client flushlogs 1>/dev/null || true

Note:

• A service fail2ban reload does NOT start logging after a rotation.
• A service fail2ban restart does start logging in /var/log/fail2ban.log