Monit installation and config on Slicehost

Monit installation and config on slicehost

sudo apt-get install monit
# Edit config file, example below
sudo vim /etc/monit/monitrc
# Check config syntax
sudo monit -t
# When no syntax errors edit the /etc/default/monit file to startup=1
sudo vim /etc/default/monit
# Start the service with:
sudo /etc/init.d/monit start

### EXAMPLE CONFIG
set daemon  60
set logfile syslog facility log_daemon
set mailserver localhost
set mail-format { from: monit@monitorserver.co.uk }
set alert alteremail@alert.com


check process httpd with pidfile /var/run/apache2.pid
   group www-data
   start program  "/etc/init.d/apache2 start"
   stop program  "/etc/init.d/apache2 stop"
   if failed host localhost port 80 protocol http
      and request "/" then alert
   if cpu is greater than 60% for 2 cycles then alert
   if cpu > 80% for 5 cycles then restart
   if children > 250 then restart
   if loadavg(5min) greater than 10 for 8 cycles then alert
   if 3 restarts within 5 cycles then timeout

check file some_file.output with path /var/www/apps/app/shared/pids/some_file.output
  if timestamp > 120 seconds then alert