set daemon  30
   with start delay 30
set log syslog

set mailserver localhost

set mail-format { from: ${monit['from_address']} }
% for alert_address in monit['alert_addresses']:
set alert ${alert_address}
% endfor

set httpd unixsocket /var/run/monit.sock
    use address 127.0.0.1
    allow 127.0.0.1

check system $HOST
    if cpu usage > 95% for 10 cycles then alert
    if memory usage > 80% then alert
    if swap usage > 25% then alert

check filesystem rootfs with path /
    if space usage > 80% for 5 times within 15 cycles then alert
    if space usage > 90% then alert
    if inode usage > 90% then alert

check process cron matching "/usr/sbin/cron"
    start program = "/usr/bin/systemctl start cron.service"
    stop program = "/usr/bin/systemctl stop cron.service"

% for systemd_service in ('systemd-timesyncd', 'systemd-networkd', 'systemd-journald'):
check process ${systemd_service} matching "/lib/systemd/${systemd_service}"
    start program = "/usr/bin/systemctl start ${systemd_service}.service"
    stop program = "/usr/bin/systemctl stop ${systemd_service}.service"
% endfor

check process sshd matching "/usr/sbin/sshd"
    start program = "/bin/systemctl start sshd.service"
    stop program = "/bin/systemctl stop sshd.service"
    if failed port 22 for 2 cycles then restart
    if 3 restarts within 5 cycles then alert

check process postfix matching "/usr/lib/postfix/sbin/master"
    start program = "/bin/systemctl start postfix.service"
    stop program = "/bin/systemctl stop postfix.service"
    if failed port 25 protocol smtp for 5 cycles then restart