Install Monit:

sudo -i

amazon-linux-extras install epel

yum -y install monit

 

Config monit:

vim /etc/monitrc

set daemon 1# set logfile /var/log/monit.logcheck process squid with pidfile /run/squid.pidstart program = "/usr/sbin/squid -f /etc/squid/squid.conf"# if failed port 808 protocol http then restart

  set daemon 1

  # set logfile /var/log/monit.log

Disable and stop squid  then enable monit

systemctl stop squid

systemctl disable squid

systemctl enable monit

systemctl start monit

View status

monit summary

monit status