apache log monitoring?

[Alex]

Hi,
I'm looking for a log monitoring tool that can alert on errors in the
access log and error log. Something like what nagios can do to alert on
serivce issues except for errors like 500 or 503.

Something like fail2ban pattern checking that can take an action in
real-time, like send an email or a text message or a Slack message would be
awesome.

Ideas greatly appreciated